valance shell example..
Answer:
Oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.Valence electrons are the electrons in the outermost shell, or energy level, of an atom. Configuration of oxygen's valence electrons as 2s²2p⁴.Explanation:
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[tex]\\ \green{MaggieEve}[/tex]
A 13.00 g sample of citric acid reacts with an excess of baking soda as shown in the equation.
H3C6H507 +3NaHCO3 →3CO2 + 3H₂O+Na3C6H507
What is the theoretical yield of carbon dioxide?
0.993 g
O2.98 g
O 3.65 g
8.93 g
Answer:
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Convert from moles to particles 6.02x1023 particles 1 mole Question 2. 2.7 moles of lithium Question 3. 1.8 moles of sodium chloride
Considering the definition of Avogadro's number:
the number of molecules of lithium is 1.62621×10²⁴ molecules.the number of molecules of sodium chloride is 1.08414×10²⁴ molecules.Definition of Avogadro's numberAvogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Amount of molecules in this caseYou can apply the following rule of three, considering the Avogadro's number: If 1 mole of lithium contains 6.023×10²³ molecules, 2.7 moles of lithium contains how many molecules?
amount of molecules of lithium= (6.023×10²³ molecules × 2.7 moles)÷1 mole
amount of molecules of lithium=1.62621×10²⁴ molecules
Finally, the number of molecules of lithium is 1.62621×10²⁴ molecules.
On the other hand you can apply the following rule of three, considering the Avogadro's number: If 1 mole of sodium chloride contains 6.023×10²³ molecules, 1.8 moles of sodium chloride contains how many molecules?
amount of molecules of sodium chloride= (6.023×10²³ molecules × 1.8 moles)÷1 mole
amount of molecules of sodium chloride=1.08414 ×10²⁴ molecules
Finally, the number of molecules of sodium chloride is 1.08414×10²⁴ molecules.
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Grams in 1.083e+24
Molecules Na BR
Please help explain why
Answer:
185 gms o NaBr
Explanation:
Na Br mole weight = 22.989 +79.904 = 102.893 gm/mole
1.083 x 10^24 molecules / 6.022 x 10^23 molecules / mole = 1.798 moles
102.893 * 1.798 = 185 gms
which sugar is called milk sugar
Answer:
Lactose is called milk sugar.
Explanation:
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Answer:
lactose
Explanation:
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An unidentified element has one electron in the outer most shell. Explain what
characteristics you would expect this element to have? Your response should include
three or four sentences
Answer:
They are unstable as single atoms, but can become stable by losing or sharing their one valence electron.
Explanation:
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What is the name of this compound
Hydrobrome Aicd
I think so...
Answer:
[tex]\fbox {1,2-di bromo pentane}[/tex]
Explanation:
⇒ Bromine atoms present on 1st and 2nd Carbon atoms
⇒ 5 carbon atoms
⇒ Only single bonds
Hence, the IUPAC name will be :
1,2-dibromopentane
Waste water from nuclear power plants is generally:
Answer:
Nuclear energy produces radioactive waste
A major environmental concern related to nuclear power is the creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes. These materials can remain radioactive and dangerous to human health for thousands of years.
Escriba la formula de:
5) Ácido -3,3-dimetil-Pentinoico
6) 3-etil-6-Heptenoato de propilo
7) Bromuro de 2,3,3-trimetil--5--Hexenoilo
8) N,N-dimetil-2-metil-3-fenil-Butanamida
9) 2-etil-2,5-Octadienal
10) 2,3,3-trimetil-5-Hexinamida
Answer:
Translate your language to EnglishAn atom is determined to contain 13 protons 10 electrons and 12 neutrons what are the mass number and charge of this atom or ion
Mass number 24 charge +2
Mass number 22 charge neutral
Mass number 34 charge -2
Mass number 34 charge +2
The mass number and charge of this atom or ion is 24 and charge +2
What is mass number ?
The mass number is equals to the total number of protons and neutrons in a nucleus.
In the give question, The number of neutrons is a distractor.
Only the number of electrons versus the number of protons determines ionic charge. The charge of the ion is +2
Hence, The mass number and charge of this atom or ion is 24 and charge +2
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What mass of ammonium nitrate
is needed to dissolve in 995 g of
water to make a 1.50 m solution?
Answer:
=> 119.4597 g
Explanation:
From our question, we have been provided with the molarity of the resultant solution.
We know that, molarity of a solution is contained in 1 L or 1000 cm³ of solution.
Hence we have 1.50 moles in 1000 cm³.
Also, we know that, 1 cm³ equivalent to 1 g for water.
Thus, from our question we have 995 cm³ of water.
Lets now solve our problem;
1.5 moles are contained in 1000 cm³
x moles are contained in 995 cm³
Cross multiply
[tex]x \: moles \: = \frac{(995 {cm}^{3} \times 1.5 \: moles )}{(1000 {cm}^{3} )} \\ = \frac{1492.5 \: moles}{1000} \\ = 1.4925 \: moles[/tex]
1.4925 moles of NH4NO3 are required to be dissolved in water.
To find the mass of solute (NH4NO3) we use the formula;
Mass = RFM (Relative Formula Mass) x Number of moles
[tex] = 80.04 \: \frac{g}{mol} \times1.4925 \: mol \\ = 119.4597 \: g [/tex]
Therefore the mass of NH4NO3 needed to be dissolved in 995 g of water is 119.4597 g
Answer:
119.4597
Explanation:
Acellus
Part 1. A chemist reacted 15.0 liters of F2 gas with NaCl in the laboratory to form Cl2 and NaF. Use the ideal gas law equation to determine the mass of NaCl that reacted with F2 at 280. K and 1.50 atm.
F2 + 2NaCl → Cl2 + 2NaF
Part 2. Explain how you would determine the mass of sodium chloride that can react with the same volume of fluorine gas at STP.
explain please (for 40 pts)
Answer:
113 g NaCl
Explanation:
The Ideal Gas Law equation is:
PV = nRT
In this equation,
> P = pressure (atm)
> V = volume (L)
> n = number of moles
> R = 8.314 (constant)
> T = temperature (K)
The given values all have to due with the conditions fo F₂. You have been given values for all of the variables but moles F₂. Therefore, to find moles F₂, plug each of the values into the Ideal Gas Law equation and simplify.
(1.50 atm)(15.0 L) = n(8.314)(280. K)
2250 = n(2327.92)
0.967 moles F₂ = n
Using the Ideal Gas Law, we determined that the moles of F₂ is 0.967 moles. Now, to find the mass of NaCl that can react with F₂, you need to (1) convert moles F₂ to moles NaCl (via the mole-to-mole ratio using the reaction coefficients) and then (2) convert moles NaCl to grams NaCl (via molar mass from periodic table). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator).
1 F₂ + 2 NaCl ---> Cl₂ + 2NaF
Molar Mass (NaCl): 22.99 g/mol + 35.45 g/mol
Molar Mass (NaCl): 58.44 g/mol
0.967 moles F₂ 2 moles NaCl 58.44 g
---------------------- x ----------------------- x ----------------------- = 113 g NaCl
1 mole F₂ 1 mole NaCl
What is the si unit if sound
Explanation:
The SI Unit of sound is decibel.
or we can say that
The SI Unit of sound is watt per square metre (i.e.w/m2).
If 19.4 mL of a Ca(OH)₂ solution are needed to neutralize 31.5 mL of 0.1 M HC₂H302 solution, what is the concentration (molarity) of the
Ca(OH)₂ solution?
Select one:
O a. 0.009 M
O b. 1.6 M
OC 0.08 M
O d. 0.1 M
The concentration (molarity) of the Ca(OH)₂ solution needed to neutralize 31.5 mL of 0.1 M HC₂H302 solution is 0.162M (option D).
How to calculate molarity?The molarity of a solution can be calculated using the following formula:
CaVa = CbVb
Where;
Ca = concentration of acidCb = concentration of baseVa = volume of acidVb = volume of base31.5 × 0.1 = 19.4 × Cb
3.15 = 19.4Cb
Cb = 0.162M
Therefore, the concentration (molarity) of the Ca(OH)₂ solution needed to neutralize 31.5 mL of 0.1 M HC₂H302 solution is 0.162M.
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Ordinary water boils at 100°C. Can it be made to boil at 95°C or 105°C.
It can be done. Normally the boiling point of water is 100°C. It will boil at temperature greater than 100°C more quickly. Water can be boiled at 95°C but for that the atmospheric pressure of the water should be decreased which will decrease the boiling point of water.
Concept :To boil water at 95°C, decrease the atmospheric pressure.
At 105°C, the water will be boiling quickly than normal at 100°C.
The best way is add alcohol .
The common way is that decrease the atmospheric pressure .
This will work as per Boyles law ,and boiling point can be decreased.
but it has few restrictions
You can't decrease pressure simply at normal conditionsFor decreasing pressure you have to go hill tops .Hence there is a spare way
Add alcoholGeneral alcohols like ethanol,butanol can decrease the boiling point of water
What are chloroethane's conditions?
Please help me
Thanks
Explanation:
Hi there!
Chloroethane requires atleast one chlorine in ethane. It's general formula is CnH2n+1Cl. It mean it must have 2 carbons, 5 hydrogens and atleast one chlorine.
In addition, carbon-carbon bond must be single and chlorine is attached to either carbons. The carbon of this compound is SP³ hybridized and has bond angle of 120°.
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What is the chemical formula for acetic acid?
CH3COOH
Explanation:
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Describe graham's law.
hydrogen chloride gas (hcl) diffuses 1.8 times faster than an unknown gas. determine the molar mass of the unknown gas. show your work or explain your answer, giving specific values used to determine the answer.
The molar mass of gas is 6.48 g/mol
What is the statement of Graham's law?Graham's law of diffusion states that the rate of diffusion of a gas is inversely proportional to the density of the gas.
The molar mass of Hydrogen gas = 2
R2/R1 = 1.8
Molar mass of gas = 2 × 1.8 × 1.8
Molar mass of gas = 6.48 g/mol
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The products of __________ combustion are carbon monoxide, carbon and water. what one word completes this sentence?
Answer:
Complete combustion
Explanation:
To solve such this we must know the concept of combustion reaction. Therefore the products of complete combustion are carbon monoxide, carbon and water.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved.
There are so many types of chemical reaction reaction like combustion reaction, acid base reaction, double displacement reaction, combustion reactions. The products of complete combustion are carbon monoxide, carbon and water. Large amount of heat is also released in combustion reaction
Therefore the products of complete combustion are carbon monoxide, carbon and water.
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compare the properties of physical and chemical change with the help of an example.
Explanation:
For physical change(1)It is easily reversable, example: the melting of ice.
(2)It produces no new substance example: all cases of melting of solid to liquid.
(3) There is no change in the mass of the substance
example: the magnetization of iron.
For chemical change(1)It is not easily reversable, example: all cases of burning.
(2) new substance are produced example: rusting of iron.
(3) There is change in the mass of the substance, example : slaking of lime.
What are two ways in which the safe house of lean might influence a product owner?
The safe house of lean might influence a product owner to provide better customer service.
What is the main purpose of safe house of lean?The safe house of lean is designed to provide ultimate value to the customer one the shortest possible time.
Employing the safe house of lean might influence the product owner in the following two ways:
enable the product ownerr work together with Agile Teams to develop stories with clear acceptance criteria.assist Agile Teams gain a clear understanding of their customers and how best to serve them.Therefore, the safe house of lean might influence a product owner to provide better customer service.
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Please answer step by step.
3 moles of NaOH reacts with 1 mole of phosphoric acid.
What is the moles ratio of the NaOH and Phosphoric acid reaction?The moles ratio of the reaction between NaOH and Phosphoric acid is given by the equation of the reaction below:
[tex]3\:NaOH + H_{3}PO_{4} \rightarrow Na_{3}PO_{4} + 3\:H_{2}O \\ [/tex]
Based on the equation of the reaction, 3 moles of NaOH reacts with 1 mole of phosphoric acid.
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Which particles that make up an atom are involved in nuclear reactions?.
How can you use quantitative chemistry and reaction dynamics to explain and optimize industrial processes and reactions that happen in everyday life?
The quantitative chemistry is helps in measuring the quantity of chemicals or chemical agents of food while making some dish or cleaning agent. It also helps in determining the quantity of macromolecules in the body, like protein, lipid, etc.
What is quantitative chemistry?
Quantitative chemistry is a branch which tells the quantity of substances, chemicals. The mass, volume etc. It also helps in determining the molecules and toxic level in the body.
Thus, the quantitative chemistry is helps in measuring the quantity of chemicals or chemical agents of food while making some dish or cleaning agent. It also helps in determining the quantity of macromolecules in the body, like protein, lipid, etc.
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What is the molar concentration of
a solution that contains
5.0 mol HCl in a total volume
of 10.0 L?
Answer:
0.5
Explanation:
5/10=0.5
What is the word equation for atoms of magnesium reacting with molecules of oxygen to produce magnesium oxide?
Answer:
The "word equation" is Magnesium + Dioxygen → Magnesium Oxide
Explanation: This is also the same as Mg + O₂ → MgO.
The reaction of nitrogen(g) with hydrogen(g) to form ammonia(g) proceeds as follows: N2(g) 3H2(g)2NH3(g) When 6.44 grams of N2(g) react with sufficient H2(g), 21.2 kJ of energy are evolved. What is the value of H for the chemical equation given
The enthalpy of the reaction is obtained as 4.876 kJ.
What is the enthalpy?The enthalpy of a reaction is the heat that is absorbed or emitted in a reaction.
Given the reaction; N2(g) + 3H2(g) ⇔2NH3(g);
Number of moles of N2 = 6.44 grams/28 g/mol
= 0.23 moles
If 1 mole of N2 releases 21.2 kJ of energy
0.23 moles of N2 releases 0.23 moles * 21.2 kJ /1 mole
= 4.876 kJ
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state and explain the trend in electronegativity values across period 3 from sodium to chlorine
The trend in electronegativity values across period 3 from sodium to chlorine is that sodium with 11 protons is the least electromagnetic element and chlorine with 17 protons is the most electronegative element.
What is electronegativity?It should be noted that electronegativity simply means a chemical property that describes the tendency of an atom to attract elements towards it.
In this case, the trend in electronegativity values across period 3 from sodium to chlorine is that sodium with 11 protons us the least electromagnetic element and chlorine with 17 protons is the most electronegative element.
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pls solve
question attached as image
Answer:
a) formula for citric acid is - C6 H8 o7
b) lime water turns opaque after adding co2 due to the formation of calcium carbonate.
c) reaction 3 is displacement reaction where a high reactive metal displace a less reactive from its salt solution.
d) reaction 1) is combination reaction where two reactant combines to give a single product whereas reaction 2) is decomposition reaction where a single reactant splits into more that 1 products.
is Zinc + Hydrogen Chloride a chem. change why or why not
Answer:
When zinc reacts with hydrochloric acid, the reaction bubbles vigorously as hydrogen gas is produced. The production of a gas is also an indication that a chemical reaction is occurring.
Explanation:
