The combination of the n and l represent the real orbitals the impossible one is 2d . It will not occur as orbital in electronic configuration.
1) 1s = In the electronic configuration it occurs as a orbital. This means it represent the real orbitals.
2) 2p = In the electronic configuration it occurs as a orbital. This means it represent the real orbitals.
3) 4s = In the electronic configuration it occurs as a orbital. This means it represent the real orbitals.
4) 2d = In the electronic configuration it not occurs as a orbital. This means it is not represent the real orbitals.
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what mass of sodium benzoate should you add to 150.0 ml of a 0.15 m benzoic acid solution to obtain a buffer with a ph of 4.25?
The mass of sodium benzoate that should you add to 150.0 ml of a 0.15 m benzoic acid solution to obtain a buffer with a ph of 4.25 is 3.72 g.
What is mass?Mass is the quantity of matter of a physical body.
The Pka value = 4.19
so, we are going to use H-H equation:
PH = Pka + ㏒[benzoate/benzoic acid]
when we have PH = 4.25
and Pka = 4.19
By substitution:
4.25 = 4.19 + ㏒[benzaoate/ benzoic acid]
[benzaoate/benzoic acid] = 1.148 M
when the [benzoic acid ] = 0.15 m
[benzaoate] = 1.148M x 0.15m = 0.1722 M
The moles of sodium benzoate = molarity x volume L
0.1722 M x 0.15 L = 0.02583 moles
The mass = moles x molar mass
0.02583 moles x 144 g/mol = 3.72 g
Therefore, the mass of sodium benzoate is 3.72 grams.
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A solute makes the freezing point of a solution lower than the freezing point of the pure solvent because A. The solute freezes at a lower temperature than the solvent does. B. The solute freezes at a higher temperature than the solvent does. C. Fewer particles of the solute exist in the solution than particles of solvent. D. The liquid phase of the solution reaches equilibrium with the solid phase at a lower temperature
A solute makes the freezing point of a solution lower than the freezing point of the pure solvent because The liquid phase of the solution reaches equilibrium with the solid phase at a lower temperature.
If a solute is dissolved in the liquid at the triple point, the escaping tendency or vapor pressure of the liquid solvent is lowered below that of the pure solid solvent. The temperature must drop to reestablish equilibrium between the liquid and the solid. Because of this fact, the freezing point of a solution is always lower than that of the pure solvent.
The freezing point depression of a solvent is a function only of the number of particles in the solution, and for this reason it is referred to as a colligative property. The depression of the freezing point, like the boiling point elevation, is a direct result of the lowering of the vapor pressure of the solvent.
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Which of the following solutions of strong electrolytes contains the largest number of moles of chloride ions: 100.0 mL of 0.30 M AlCl3, 50.0 mL of 0.60 M MgCl2, or 200.0 mL of 0.40 M NaCl?
The largest number of moles of chloride ions are in 100ml of 0.3M AlCl3.
The moles is calculated as
molarity= moles/ molecular weight×100
moles of AlCl3= 0.1×0.3×133.34
= 4 mole where there are 3 chloride ion so it will be 12 moles.
Moles of MgCl2= 0.05× 0.6× 95.21
= 2.85 equivalent to 3moles where 2 chloride ion so it will be
Moles of NaCl =0.2× 0.4 ×58.5
= 4.67 where there are 1 chloride ion so it will be 4.67.
Mole is a measure of the number of substances and molarity is a measure of concentration. Molarity indicates the amount of substance present in a mixture. Molarity is given as the moles of substance in the volume of solvent. A mole is a unit, but a molarity is not.
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find the formula of an oxide of carbon in which the ratio by mass of oxygen to carbon is 2.00:1.00.
Since there are three oxygen atoms and a total of 16 times as much carbon as there are carbon atoms, the formula 03C2 will result in a gigantic oxygen to carbon ratio of 2 to 1.
Describe carbon.Carbon is an element with symbol 'C' and atomic number 6 (from the Latin carbo, meaning "coal"). It has a tetravalent atom, which means that four of its electrons can be used to create covalent chemical bonds. It is nonmetallic. The periodic table's group 14 includes it. The crust of the Earth contains 0.025 percent carbon.
Why does carbon matter so much?Without carbon, life on the planet would not be conceivable. This is partly because carbon can easily make bonds to other atoms, allowing biomolecules like RNA and DNA which are crucial for the development and replication that characterizes life, to take on a variety of shapes and functions.
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When 22.3 g of calcium chloride, CaCl2, was dissolved in water in a constant-pressure calorimeter, the temperature rose from 25.0°C to 37.9°C. If the heat capacity of the solution and the calorimeter is 1258 J/°C, what is the enthalpy change when 1.05 mol of calcium chloride dissolves in water? The solution process is the following.
CaCl2(s) → Ca2+(aq) + 2 Cl −(aq)
The change in enthalpy of the solution when 1.05 mol of calcium chloride dissolves in water is 15455.43 J/mol
What is Change in EnthalpyThe enthalpy change when a substance dissolves in water is called the heat of solution or enthalpy of solution. The heat of solution can be calculated using the equation:
ΔHsolution = q / n
Where:
q = heat absorbed or released during the solution process (can be measured by a calorimeter)
n = number of moles of solute dissolved
Given that the heat capacity of the solution and the calorimeter is 1258 J/°C, and the temperature rose from 25.0°C to 37.9°C, we can calculate the heat absorbed during the solution process using the equation:
q = mcΔT
Where:
m = mass of the solution (can be assumed to be the mass of water)c = heat capacity of the solution and the calorimeter (1258 J/°C)ΔT = change in temperature (37.9 - 25.0 = 12.9°C)Substituting the values we get:
q = 1258 J/°C * 12.9°C = 16,228.2 J
Now, we can use this value of q to calculate the enthalpy change when 1.05 mol of calcium chloride dissolves in water by using the equation:
ΔHsolution = q / n
Substituting the values we get:
ΔHsolution = 16,228.2 J / 1.05 mol = 15,455.43 J/mol
Therefore, the enthalpy change when 1.05 mol of calcium chloride dissolves in water is 15,455.43 J/mol.
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determine the ph of a 0.188 m nh3 solution at 25°c. the kb of nh3 is 1.76 × 10-5.
Answer A. 5.480 B. 2.740 C. 8.520 D. 11.260 E. 12.656
pH is 11.26 of a 0.188 m NH₃ solution at 25°c and the kb of nh3 is 1.76 × 10⁻⁵.
When NH₃ is dissolved in water, it will dissociates partially producing NH⁴⁺ ions and OH⁻ ions. Equation will be:
NH₃ + H₂O → NH₄⁺ + OH⁻
We using the Kb expression to determine the [OH-] concentration,
Kb = [NH⁴⁺] [OH⁻] /* [NH₃]
We can write NH₄⁺ as OH⁻ since they are in equal ratio.
(1.76*10^-5) = [OH-]² / 0.188
[OH-]² = 3.3088*10^-6
[OH-] = 1.819*10^-3
Therefore, we calculate for H+ concentration as follows:
[H⁺] [OH⁻] = 10^-14
[H⁺] = 10^-14 / [OH-]
[H⁺] = 10^-14 / (1.819*10^-3)
[H⁺] = 5.50*10^-12
pH = -log [H⁺]
pH = -log (5.5*10^-12)
pH = 11.26
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Prepare six straight dilutions of the 0.1% BPB solution. The six dilutions are 1:2, 1:4, 1:5, 1:10, 1:50, 1:100 of your 0.1% solution. The final volume of each dilution should be 4 ml.
What is the final % BPB in each dilution?
The final % BPB in each dilution is 0.001%, 0.0005%, 0.0004%, 0.0002%, 0.00004% and 0.00002%.
To calculate the final % BPB in each dilution, you need to take into account the dilution factor and the initial concentration of the 0.1% BPB solution. The dilution factor is the ratio of the final volume to the initial volume.
The final concentration of BPB in each dilution can be calculated by using the following formula:
Final concentration = Initial concentration x dilution factor
The dilution factors for each dilution are 1:2, 1:4, 1:5, 1:10, 1:50 and 1:100 respectively. By multiplying the initial concentration of 0.1% with these dilution factors, we get the final concentrations of 0.001%, 0.0005%, 0.0004%, 0.0002%, 0.00004% and 0.00002% respectively.
It's important to note that when preparing dilutions, it is important to make sure that the final volume of each dilution is the same, in this case it's 4ml and to use the appropriate dilution factor for each case, as it affects the final concentration of BPB.
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in photoelectron spectrum for sulfur atoms, which electron corresponds to peak with lowest binding energy ?
In photoelectron spectrum for sulfur atoms valence electrons corresponds to peak with lowest binding energy.
What can be seen in a photoelectron spectrum?The relative energies of occupied molecular orbitals can be determined from a photoelectron spectrum by ionization. (i.e. the electron's ejection). The energy spacing between the vibrational levels of a specific electronic state can also be determined using a photoelectron spectrum.
The electrons in the atom's various subshells are represented by the peaks in the PES spectra. The valence electrons are represented by the peaks with the lowest binding energies, while the inner-shell or core electrons are represented by the peaks with the highest binding energies.
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18. regarding the formula al2o3 which of the following is accurate? a. the coefficient 3 indicates that there are a total of three atoms of oxygen present in the substance. b. the chemical symbol al indicates that argon is present in the substance. c. the subscript 2 indicates that two atoms of aluminum are present in the substance. d. the subscript 2 indicates that two atoms of oxygen are present in the substance.
The subscript 2 denotes that the material contains two aluminum atoms. Silvery-white and light in weight, aluminum is a metal. It is supple and moldable. Cans, foil, culinary kitchenware, window frames, beer kegs, and airplane parts are just a few examples of the many goods that employ aluminum.
Which substances are present in aluminum?Gibbsite and boehmite, two alpha-hydroxide compounds, are found in bauxite. In the synthesis of aluminum compounds such aluminum disulfide, sodium aluminate, metal fluoride, & aluminum chloride hexahydrate, aluminum trihydroxide is a key ingredient.
How is aluminum produced?Natural environments do not contain pure aluminum. Beginning with bauxite, which is made up of dehydrated al2o3 (4.0% to 60%) combined with silica + iron oxide, the manufacturing of primary pure metal can begin. For every 4 to 5 tons of bauxite ore, 2 tonnes of aluminium are produced
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Consider the width of each block and its relation to the subshell being filled. Complete the table. Num of Orbitals s 14 p 30 d 40 f 28 Width of Periodic Block 1 3 5 7 Next (11 of 12) Incorrect
A collection of electrons in a shell organized into subshells based on the form of the space they fill.
Each subshell's electrons are organized into orbitals, which are areas of the atom's interior where a certain electron is most likely to be found. An atomic orbital is a function that describes the position and wave-like activity of an electron in an atom in terms of both atomic theory and quantum mechanics.
This function can be used to determine the likelihood of discovering any atom's electron in any particular area surrounding the nucleus.
The physical area or space where the electron may be calculated to be present, as predicted by the specific mathematical shape of the orbital, is sometimes referred to as an atomic orbital.
The complete question and answer are attached as images.
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plese hurrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrry
Use the food web below and your knowledge of science to answer the question below.
Group 4 Food Web
Hawks are predators to small organism such as snakes, rabbits, and mice. What is a possible result of adding a hawk to this ecosystem?
Question 2 options:
The rabbit population will increase.
The grass population will increase.
The cougar population will increase.
All of the above
Answer:
Pretty sure that’s correct
Explanation:
Answer: The answer is:
The grass population will increase.
Explanation: Didn't see anything that could be correct, so I chose this on the K12 test and it was correct.
an aqueous sucrose (c12h22o11) solution must be created for an experiment. if 100.00 ml of 0.200 m solution is needed, what amount of sucrose (in grams) must be weighed out? only input numbers. your answers must be expressed to the hundredth place. any values less than one must have a zero in front of the decimal (e.g. 0.01 not .01).
The amount of sucrose (in grams) must be weighed out for the given reaction is6.846g.
Moles n = W/ M
Given detail.
molarity of sucrose = 0.2 M
volume of solution 100 ml
Relationship between moles and molarity is.
M = n/ V
On placing value in it
n = 0.02
molar mass of sucrose = 342.3 g/ mole
Now we calculate needed mass from 1st equation.
W = (0.02) (342.3)
= 6.846 g
Molarity is defined as the moles of a solute per liters of a result. Molarity is also known as the molar concentration of a solution.
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Answer the following questions about an atom of the element aluminum.
11. Write the electron configuration. Circle/highlight the electron(s) that are lost when this atom
becomes an ion.
12. Write the orbital diagram. Circle/highlight the electron(s) that are lost when this atom becomes
an ion.
13. Draw a Bohr's model of the atom, putting electrons in orbits. The orbit capacities are 2, 8, 8, 18.
14. Write the electron dot structure.
15. Does this atom gain or lose electrons to become an ion? How many electrons are gained/lost?
16. Which noble gas has the same electron structure as this ion?
17. Write the symbol for the ion. Put the charge on the top right next to the element symbol.
18. Write the new electron configuration for the ion.
19. Write the name of the ion.
20. Write an equation that shows how the element becomes an ion. Use the symbol e to represent
the electron.
Answer:
11. NA+
12. Radium(ra)
13.Orbit or level energy
Explanation:
Which of the following expresses the quantitative measurement? (a)the burette is longer than the pipette. (b)HCl is stronger than HCN d)boiling point of ethyl alcohol is 75°34' water is a colourless liquid.
Answer: d. boiling point of ethyl alcohol is 75.
Explanation:
In a px orbital, the subscript x denotes the A. axis along which the orbital is aligned B. size of the orbital C. spin of the electron D. energy of the electron
The axis that the orbital is aligned with is indicated by the subscript x in a px orbital.
The correct statement is A.
The PX orbital is what?px orbital: A p atomic orbital that is located on the x-axis of the Cartesian coordinate system. A non-hybridized carbon atom's px, py, and pz atomic orbitals are located along the x, y, and z axes of the Cartesian coordinate system. Blue represents the atomic orbital of px. These orthogonal p atomic orbitals are.
PX and PY properties: what are they?Context. px. identifies properties that cannot have user input on an HTML form because they are special properties. py. Values can be entered by users on an HTML form because properties with names that begin with py are not special.
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if it takes three breaths to blow up a balloon to 1.2 l and each breath supplies the balloon with 0.60 moles of exhaled air, how many moles of aur are un a 3.0 l ballon?
If it takes three breaths to blow up a balloon to 1.2 liters and each breath supplies the balloon with 0.60 moles of exhaled air, the total number of moles of air in the 1.2 L balloon is:
0.60 moles/breath x 3 breaths = 1.8 moles
To find out how many moles of air are in a 3.0 L balloon, you can use the relationship between moles and volume (at constant temperature and pressure):
n = PV/RT
where:
n = number of moles
P = pressure (assumed to be constant)
V = volume
R = ideal gas constant
T = temperature (assumed to be constant)
Since the balloon is filled with exhaled air, we can assume that the temperature and pressure inside the balloon are approximately the same as the ambient temperature and pressure. So we can use the ideal gas constant (R) and the current temperature (T) to calculate the number of moles of air in a 3.0 L balloon.
Then,
n = (1.8 moles * 3.0 L) / (R * T)
It should be noted that we are assuming a constant temperature and pressure, and also exhaled air is not a pure gas and its composition can vary, thus the ideal gas law may not be the most accurate way to calculate the number of moles of air in a balloon.
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Find the percentage dissociation and hydrogen ion concentration of 0.2 mol/dm^3 of ethanoic acid if the equilibrium constant of acid is 1.85x10^-5 mol/dm^3
The percentage dissociation is 0.97% and the hydrogen ion concentration is 1.93 x 10^-3 mol/dm^3.
To find the percentage dissociation and hydrogen ion concentrationwe need to use the equation:
Ka = [H^+][A^-] / [HA]
where Ka is the equilibrium constant, [H^+] is the hydrogen ion concentration, [A^-] is the concentration of the dissociated form of the acid (acetate ion), and [HA] is the concentration of the undissociated form of the acid (ethanoic acid).
We know the concentration of ethanoic acid, [HA] = 0.2 mol/dm^3, and the value of the equilibrium constant, Ka = 1.85 x 10^-5 mol/dm^3.
Using the equation:
Ka = [H^+][A^-] / [HA]
1.85 x 10^-5 = [H^+][A^-] / 0.2
[H^+][A^-] = 1.85 x 10^-5 * 0.2
[H^+][A^-] = 3.7 x 10^-6 mol^2/dm^6
Since the concentration of the acetate ion is equal to the concentration of the hydrogen ion, [A^-] = [H^+].
So,
[H^+]^2 = 3.7 x 10^-6 mol^2/dm^6
[H^+] = sqrt(3.7 x 10^-6) = 1.93 x 10^-3 mol/dm^3
The hydrogen ion concentration is 1.93 x 10^-3 mol/dm^3.
To find the percentage dissociation, we divide the concentration of the acetate ion by the initial concentration of ethanoic acid and multiply by 100:
Percentage dissociation = ([A^-] / [HA]) * 100
Percentage dissociation = (1.93 x 10^-3 / 0.2) * 100 = 0.97%.
Therefore, The percentage dissociation is 0.97% and the hydrogen ion concentration is 1.93 x 10^-3 mol/dm^3.
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What is the % yield if 4 moles of hydrogen is reacted with 3 moles of oxygen and produces 3 moles of water?
The balanced equation for the reaction between hydrogen and oxygen to form water is:
2H2 + O2 -> 2H2O
To react 4 moles of hydrogen with 3 moles of oxygen, we will also need 1.5 moles of oxygen.
Since we have enough hydrogen and not enough oxygen to react completely, we can calculate the theoretical yield of water produced.
4 moles of H2 will react to produce 2 moles of H2O and 1.5 moles of O2 will react to produce 0.75 moles of H2O. Therefore, the total theoretical amount of water produced is 2 + 0.75 = 2.75 moles of water.
percent yield = (actual yield / theoretical yield) x 100
percent yield = (3 / 2.75) x 100 = 109.09%.
So the percent yield is 109.09%. This means that 109.09% of the theoretical yield was actually produced, and the reaction was more efficient than expected.
It's worth noting that percent yield can't be more than 100% because it implies that more than the theoretical amount of product was produced, which is not possible. In this case, the percent yield is not a realistic value, therefore, the actual yield and the theoretical yield should be rechecked.
I need help ASAP! Both questions please!!
Answer and Explanation for the First Question:
For the first question, when a 3.0 M aqueous NaOH solution is added to a neutral solution containing litmus, the color change in the solution would be from purple to blue. Thus, the answer would be C.
Litmus exists in solution in equilibrium form as H-Lit(aq) (red) ⇌ H⁺(aq) + Lit⁻(aq) (blue). At around pH 7, or neutral, the solution contains an equal amount of both forms of litmus, resulting in a purple color. This is because there are always some H⁺ ions present in the solution, even in neutral solutions, and the red and blue forms of litmus are present in equal amounts, which make the solution purple.
When a strong base like NaOH is added to the litmus solution, the OH⁻ ions from NaOH fully dissociate and react with the H⁺ ions in the litmus solution, forming water. This reaction causes the equilibrium position to shift in the direction of replacing the lost H⁺ ions. As more H-Lit(aq) molecules dissociate to form H⁺(aq) and Lit⁻(aq), the litmus becomes more ionized.
Since ionized litmus in solution is blue, the color of the solution will change from a neutral purple to a basic blue.
Answer and Explanation for the Second Question:
For the second question, according to the information given, the most likely pH of the solution is 6.0. Thus, the answer would be B.
The pH of the solution can be determined by looking at the color change of the three indicators added. Bromocresol green is yellow at the acidic end of its range, blue at the basic end of its range, and its pH range is 3.8 to 5.4. Chlorophenol red is yellow at the acidic end of its range, red at the basic end of its range, and its pH range is 5.2 to 6.8. Thymol blue is yellow at the acidic end of its range, blue at the basic end of its range, and its pH range is 8.0 to 9.6. Since the solution is blue when bromocresol green is added and orange when chlorophenol red is added, the pH of the solution must be between 5.4 and 6.8. The only possible value in this range is 6.0, which is why it is the most likely pH of the solution.
In Chapter 20, we will explore how nitriles can be converted into carboxylic acids. How would you use IR spectroscopy to monitor the progress of this reaction? Select all that apply. O Disappearance of a signal - 1700 cm^-1 O Appearance of a sharp signal -3300 cm^-1 O Appearance of a broad signal between 3200 and 3600 cm^-1 O Disappearance of a signal-2200 cm^-1 O Appearance of a broad signal between 2200 and 3600 cm^-1 O Appearance of a signal -2200^-1 O Disappearance of a sharp signal - 3300 cm^-1 O Appearance of a signal - 1700 cm^-1
IR spectroscopy can be used to monitor the conversion of nitriles to carboxylic acids by observing changes in the absorption bands of the C-N triple bond at 1700 [tex]cm^-1[/tex], C=O functional group at 3300 [tex]cm^-1[/tex], C-O-H functional group between 2200 and 3600 [tex]cm^-1[/tex], and disappearance of the signal at 2200 [tex]cm^-1[/tex].
The disappearance of a signal at 1700 [tex]cm^-1[/tex].The appearance of a sharp signal at 3300 [tex]cm^-1[/tex].The appearance of a broad signal between 2200 and 3600 [tex]cm^-1[/tex].The disappearance of a signal at 2200 [tex]cm^-1[/tex].IR spectroscopy can be used to monitor the progress of the reaction by observing changes in the absorption bands of the functional groups present in the nitrile and carboxylic acid. During the conversion of nitrile to carboxylic acid, the nitrile C-N triple bond absorbs at around 1700 [tex]cm^-1[/tex].
As the reaction proceeds, this signal will disappear as the triple bond is broken. Additionally, carboxylic acids have a sharp absorption band at around 3300 [tex]cm^-1[/tex]. corresponding to the C=O functional group. As the reaction proceeds, this signal will appear as the carboxylic acid is formed.
Furthermore, carboxylic acids have a broad absorption band between 2200 and 3600 [tex]cm^-1[/tex]. corresponding to the C-O-H functional group. As the reaction proceeds, this signal will appear as the carboxylic acid is formed and the signal at 2200 [tex]cm^-1[/tex]. from the nitrile will disappear.
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How many milligrams of caffeine in a cup of coffee?
The amount of caffeine in a cup of coffee can vary widely depending on the type of bean, the brewing method, and the serving size.
On average, an 8-ounce (240-milliliter) serving of coffee contains about 95 milligrams of caffeine. However, this can range from 40 milligrams to as much as 200 milligrams or more depending on the factors mentioned above.
It's worth noting that a standard cup of coffee has about 95-165mg, but a larger cup could have more than that. Also, some types of coffee have higher caffeine content than others.
It's always good to check the label of the product you are consuming or ask the vendor for more information if you are concerned about your caffeine intake.
if a city water supply has a limit of 250 ppm of nitrate ion, what is the maximum amount of nitrate ion, in grams, that may be present in a 10,000-gallon reservoir?
Nitrate, also referred to as "cyan syndrome," is a potentially fatal blood disease that can affect neonates less than six months.
Why do plants need nitrates in the first place?The necessity of nitrates in plants. Phosphorus
potassium, and nitrogenPhosphorus The growth of leaves is mostly controlled by nitrogen. Plants utilize nitrates, which are compounds of nitrogen and oxygen. Typically, they absorb nitrates from the soil.
How do plant roots respond to nitrification?Uptake and Needs of Plant Nitrogen Plants can take up the soil's nitrogen as NH4+ and NO3 ions, but most of it is snapped up as nitrate due to how common nitrification is in agricultural soils. Nitrate is easily transported to plants.
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Construct the molecular orbital diagram for N2 and then identify the bond order Bond order0.5 O 1.5 O 2.5 2s 2s Click within the blue boxes to add electrons.
This creates a total of six electrons in the bonding molecular orbitals, giving the bond order of 2.5.
What is molecular?Molecular is the level of organization that deals with atoms and molecules. At this level, we are looking at the chemical structure of matter. Molecules are formed when atoms of different elements bond together to form a single unit.
The molecular orbital diagram for N2 consists of two valence orbitals, a 2s orbital and a 2p orbital. Each atom contributes one electron to the 2s orbital and three electrons to the 2p orbital. The electrons in the 2s orbital are paired, while the electrons in the 2p orbital are unpaired.
The molecular orbital diagram for N2 is as follows:
2s orbital:
e- ↑↓
2p orbital:
e- ↑ ↑ ↑
The bond order of N2 is 2.5, which indicates that it is a strong triple bond. This is because the 2s and 2p orbitals overlap to form three bonding molecular orbitals, each containing two electrons. This creates a total of six electrons in the bonding molecular orbitals, giving the bond order of 2.5.
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can someone help me pls ,,
Balance the following equations
1. N2O5 -> N2O4 + O2
2. KNO3 -> KNO2 + O2
3. NH4NO2 -> N2 + H2O
4. O3 -> O2
5. Zn + AgCl -> ZnCl2 + Ag
6. NaOH + H2SO4 -> NA2SO4 + H2O
Answer:
Explanation:
Rather than doing all the reactions, let's look at one in detail and develop a process for answering the rest.
Start with a pencil and paper. Pencil, because balancing equations requires some initial guesses that often need to be changed (erased).
Make a table such as shown on the attached worksheet. The first problem is demonstated on the attachment.
1. N2O5 -> N2O4 + O2
2N2O5 -> 2N2O4 + 1O2
2. KNO3 -> KNO2 + O2
We only need 1 K and 1 N for the producrs, and 1 KNO3 supplies that number. But 1 KNO3 has 3 O atoms, while the only place for the O atoms to go is )2, a diatomic molecule. To obtain 2O for the 1O2, we need to change the KNO3 coefficient to 2:
2KNO3 -> KNO2 + O2
Now change the KNO2 coefficient to 2 (to accomodate the 2 K and 2 N atoms):
2KNO3 -> 2KNO2 + O2
The reactants have 6 O atoms, so we should be balanced:
2KNO3 -> 2KNO2 + O2
K 2 2
N 2 2
O 6 4+2 = 6
3. NH4NO2 -> N2 + H2O
NH4NO2 -> N2 + 2H2O
N 2 2 0
H 4 0 4
O 2 0 2 Everything is balanced
4. O3 -> O2
O3 -> O2
2O3 -> 3O2
6 O 6 O
5. Zn + AgCl -> ZnCl2 + Ag
Zn + 2AgCl -> ZnCl2 + 2Ag
Zn 1 1
Ag 2 2
Cl 2 2
Everything is balanced.
6. 2NaOH + H2SO4 -> Na2SO4 + 2H2O
Na 2 0 2 0
O 2 4 4 2
H 2 2 4
S 1 1
What are hydroscopic salts?
Answer:
A hygroscopic salt is a salt that can absorb water
Explanation:
This water usually comes from water vapor in the atmosphere and the process occurs at room temperature. Once the water is absorbed, the physical properties of the salt, like color and viscosity, may change.
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Answer:
A hygroscopic salt is a salt that can absorb water. This water usually comes from water vapor in the atmosphere and the process occurs at room temperature. Once the water is absorbed, the physical properties of the salt, like color and viscosity, may change. However, the hygroscopic substance does not dissolve.
Hygroscopy - A substance that has the ability to adsorb and absorb moisture or water from the surrounding environment is known as hygroscopic and its property is called hygroscopy. Examples - Silica gel, honey, methanol, concentrated sulphuric acid, glycerine, ethanol, etc.
Explanation:
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The mass number is used to calculate the number of ______________________in one atom of an element. In order to calculate the number of neutrons you must subtract the ___________________ from the ______________________.
Answer:
see full answer in below
Explanation:
The mass number is used to calculate the number of neutrons in one atom of an element. In order to calculate the number of neutrons you must subtract the number of protons (atomic number) from the mass number (atomic mass or mass number).
Answer:
The mass number is used to calculate the number of neutrons in one atom of an element. In order to calculate the number of neutrons you must subtract the atomic number from the mass number.
Explain how and why most of Earth’s precipitation comes from oceans.
The most common types of precipitation are rain, hail, and snow.
What kind of precipitation is in the ocean?Rain is precipitation that falls to the top of the Earth as water droplets. Raindrops form around microscopic cloud moisture nuclei, The ocean plays a key role in this essential cycle of water. The ocean holds 97% of the total water on the planet; 78% of global precipitation happens over the ocean
Precipitation forms in the clouds when water vapor precipitation into bigger and bigger droplets of water. When the drops are heavy sufficient, they fall to the Earth. If a cloud is colder, like it would be at a higher height, the water droplets may freeze to form ice.
So we can conclude that The main forms of precipitation involving drizzle, are rain, sleet, snow, graupel, and hail.
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Which of the following complexes or complex ions has geometric (cis/trans) isomers?
[Co(NH3)2Cl2]^2- (tetrahedral)
[Cr(NH3)4Cl2]^+
[Cr(NH3)5Cl]^2+
[Pt(NH3)2Cl2] (square planar)
Two of the four compounds will exhibit cis-trans isomerism. They are [Pt(NH₃)₂Cl₂] and [Cr(NH₃)₄Cl₂]+, respectively.
What is isomerism?In chemistry, isomers are molecules or polyatomic ions with the same number of atoms in each element as their molecular formulae, but different atomic configurations in space. The existence or absence of isomers is referred to as isomorphism. Not all isomers share the same physicochemical characteristics. Isomerism is the existence of molecules with the same number of atoms (and, consequently, the same formula), but with different chemical and physical characteristics. When several compounds have the same chemical formula but different chemical structures, this is known as isomerism.
Here,
Cis-trans isomerism will be observed in two of the four compounds. They are respectively [Pt(NH₃)₂Cl₂] and [Cr(NH₃)₄Cl₂]+.
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if you have a total of 0.6 moles of ch3cooh, how many moles of naoh would you need to completely neutralize ch3cooh? group of answer choices
We have choice (d) 0.6 mole of NaOH as the response based on the question.
How can acid be neutralized?The proportion of H3O+ ions within the solution is reduced by adding a base. Chemically speaking, a base and a acid are opposites. An acidic solution moves away from the centre of the pH scale and becomes less acidic as a base is introduced. This process of neutralize acid is known as neutralization .
For neutralization reaction :
Number of moles of acid, CH3COOH = Number of moles of base, NaOH = 0.6 mol
So, number of moles of NaOH required = 0.6 mol of NaOH
Therefore, option (d) " 0.6 moles of NaOH " is the answer.
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The Complete Question :
if you have a total of 0.6 moles of CH₃COOH, how many moles of NaOH would you need to completely neutralize CH₃COOH.
A) 0.9 moles NaOH
B) 0.3 moles NaOH
C) No test is provided
D) 0.6 moles NaOH
What is the difference between a magma formed by fractional crystallization and one formed by ordinary cooling?
The difference between a magma formed by fractional crystallization and one formed by ordinary cooling is that the magma becomes progressively enriched in silica.
What is fractional crystallization of magma?Processes that separate crystals from liquid are referred to as fractional crystallization. The liquid that is left over in this situation is regarded as a fresh magma. The crystals can be removed from a magma by a number of methods. The liquid that many minerals crystallise from is denser than the mineral itself.Fractional crystallisation, in its simplest form, is the removal of newly created crystals from an initially homogenous magma (for instance, via gravity settling) in order to stop these crystals from reacting further with the remaining melt.All igneous rocks are created from magma, which is a naturally occurring substance that is molten or semi-molten. The Earth possesses magma beneath its surface, and other terrestrial planets and several naturally occurring satellites have also been confirmed to have magmatic activity.Learn more about fractional crystallization of magma refer to :
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