Oxygen gas is produced at the positive electrode of the solution.
What is produced?We know that the term electrolysis has to do with the process by which we can be able to cause the splitting of a compound that is ionic when we pass a direct current through the solution of the compound.
Now we know that at the negative electrode, we are going to have the copper metal that is discharged but at the positive electrode, we are going to have the discharge of oxygen gas. This is because it is higher in the series than sulfate ions.
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the radioactive isotope 32p decays by first-order kinetics and has a half-life of 14.3 days. how long does it take for 95.0% of a sample of 32p to decay?
Since 32p has first-order kinetics and a half-life of 14.3 days, it will take 62 days for 95.0% of a sample to degrade. The half-life of a chemical reaction is the time interval during which the concentration.
Of a particular reactant reaches 50% of its initial concentration (i.e. the time taken for the reactant concentration to reach half of chemical reaction and its initial value). The sign "t1/2" is used to denote it and is frequently expressed in seconds. Isotopes are two or more atom types that share the same atomic number (number of protons in their nuclei) and position in the periodic table. 0.693/14.3 = 2.303/t *(log(100/5))
t = 61.82 days
t = 62days
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mixtures typically melt at different temperatures than the pure substances they are composed of. brass is a mixture composed of copper and zinc, and it melts at temperatures between 820 degrees celsius ( oc) and 1030 degrees celsius ( oc). why might different samples of brass melt at different temperatures?
Different samples of brass may melt at different temperatures due to variations in their composition. Impurities or other trace elements present in the brass can also affect the melting point.
Which metal is the easiest to melt?The metal which is easiest to melt and has a low melting point is mercury. Mercury has the lowest melting point reaching in at -39 C, while on the other hand aluminium alloys melt at 463-671 C.
What are the main uses of brass?Brass is still mainly used in applications where there is need of corrosion resistance and low friction. It is used in locks, zippers, plumbing, valves, and electrical plugs and sockets. It is used vastly in making of some musical instruments also.
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When heated strongly, solid calcium carbonate decomposes to produce solid calcium oxide and carbon dioxide gas, as represented by the equation above. A sample of CaCO3 is placed in a rigid 35L reaction vessel from which all the air has been evacuated. The vessel is heated to 437°C at which time the pressure of CO2 in the vessel is constant at 1.00atm. Calculate the number of grams of CO2 gas that are present after the reaction completes.
The mass of the carbon dioxide gas is 26.4 g.
What is the mass of the carbon dioxide?We know that the mass of the carbon dioxide can be gotten from the number of moles of the compound that we have in the compound and we can be able to get it from the ideal gas equation.
Temperature = 437°C + 273
Volume = 35L
Pressure = 1.00atm
Number of moles = ?
Given that;
PV = nRT
n = PV/RT
n = 1.00atm * 35L/0.082 atm LK-1mol-1 * 710
n = 35/58.22
n = 0.60 moles
Mass = Number of moles * Molar mass
= 0.60 moles * 44 g/mol
=26.4 g
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If the ph of a solution is increased from ph 5 to ph 7, it means that the?
If the pH of a solution is increased from pH 5 to pH 7, it means that the solution has become more alkaline. The pH scale ranges from 0 to 14, with 7 being neutral, less than 7 being acidic, and greater than 7 being basic or alkaline.
A pH increase from 5 to 7 means that the concentration of hydroxide ions in the solution has increased, leading to a higher level of basicity.
A change in pH can have significant impacts on the chemical and biological systems that the solution interacts with. For example, a change in pH can alter the solubility of certain substances, alter the activity of enzymes, or affect the growth and behavior of microorganisms. It is important to carefully control the pH of solutions in various applications, such as in food and beverage processing, pharmaceutical manufacturing, and environmental management.
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Place the steps in order from beginning to end to show how to determine the percent composition of a compound from its chemical formula.
Mass percentage is a term that represents the concentration, basically mass by mass percentage. It tells about the percentage of a component in a whole component. Therefore, in the below given ways we can find the percent composition.
What is percentage by mass?Mass percentage represents the the percentage of each element that is making a particular compound. Mass percentage does not have any unit as numerator and denominator contains the same unit.
Mathematically,
Percentage of mass = (component’s mass ÷ total mass) x 100%
Therefore, in the above given ways we can find the percent composition.
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12
(e) Ethane-1. 2-diol has two alcohol functional groups.
H H
H-0-C-C-0-H
Η Η
One molecule of ethane-1,2-diol will react with two molecules of ethanoic acid to form
molecule X
X has two ester functional groups and a molecular formula of CHO
(i) State the empirical formula of X.
[1]
The stated assertion implies that X has the empirical formula C₃H₅O₂ since ethane-1, 2-diol has eight drinking functional groups.
How is a molecule created?When five or more atoms come together and establish bonds with one another, a molecule is created. When two atoms link together, they share a single electron. A molecule is created as a result of a covalent connection.
What makes water a molecule?Because it has molecular bonds, water is a molecule. Water is a compound as well since it contains several different types of elements (oxygen and hydrogen). You might claim that water is really a type of molecule if you want.
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Calculate E∘cell for the balanced redox reaction.
PbO2(s)+4H+(aq)+Sn(s)→Pb2+(aq)+2H2O(l)+Sn2+(aq)
E°cell for the balanced redox reaction is -0.531 V.A redox reaction can be defined as a chemical reaction in which electrons are transferred between two reactants participating in it.
How is an EO cell calculated?Calculating E° cells given K either K provided Eo cell can both be done using this equation. The following formula can be utilized if the RT is constant and the temperature is 298 K: Find the empirical formula (K) for the reaction using F o (0.025693V/n) and K is -0.34V.
PbO2 (s) + 4 H+ (aq) + Sn (s) --> Pb2+ (aq) + 2 H2O (l) + Sn2+ (aq) AI Recommended
How can E° cell be calculated using common reduction potentials?Using E° cell table, calculate the E° readings using the conventional reduction potentials. Identify E°cell as E°cathode - E°anode in step 4. Step 5: We can use G = -nFE°cell after calculating E° cell and determining the amount of moles of electrons.
To know more about A redox reaction can be defined as a chemical reaction in which electrons are transferred between two reactants participating in it.
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You have samples of 3 different dandelion poisons. They cost $10 a gallon, $20 a gallon and $30 a gallon respectively. You would like to determine which one is the most effective. State your hypothesis, design an experiment, and state a result that would support your hypothesis quiz
The toxin that costs $30 per gallon is the most potent. We can draw the conclusion that the dandelion poison that costs $30 per gallon is the most potent.
What poison has the highest potency?Toxin from botulinum. Although scientists have different opinions on the relative toxicity of various compounds, most appear to concur that the anaerobic bacteria-produced botulinum toxin is the most toxic substance ever discovered. At most 1 nanogram per kilogram of its LD50 can kill a human.
What three sorts of poison are there?In terms of poisoning, chemicals can be broken down into three major categories: biological poisons, or substances derived from plants and animals, pharmaceuticals, and health care goods. The following discussion covers these three categories as well as a fourth one called radiation.
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valency of all elements
Answer:
Number Valency
Valency of Hydrogen 1 1
Valency of Helium 2 0
Valency of Lithium 3 1
Valency of Beryllium 4 2
Valency of Boron 5 3
Valency of Carbon 6 4
Valency of Nitrogen 7 3
Valency of Oxygen 8 2
Valency of Fluorine 9 1
Valency of Neon 10 0
Valency of Sodium (Na) 11 1
Valency of Magnesium (Mg) 12 2
Valency of Aluminium 13 3
Valency of Silicon 14 4
Valency of Phosphorus 15 3
Valency of Sulphur 16 2
Valency of Chlorine 17 1
Valency of Argon 18 0
Valency of Potassium (K) 19 1
Valency of Calcium 20 2
Valency of Scandium 21 3
Valency of Titanium 22 4
Valency of Vanadium 23 5,4
Valency of Chromium 24 2
Valency of Manganese 25 7, 4, 2
Valency of Iron (Fe) 26 2, 3
Valency of Cobalt 27 3, 2
Valency of Nickel 28 2
Valency of Copper (Cu) 29 2, 1
Valency of Zinc 30 2
for cis-1,3-dimethylcyclohexane, which structures represent the possible boat conformations?
The two possible boat conformations of cis-1,3-dimethyl cyclohexane are the A) chair-boat and D)the twist-boat conformations.
The chair-boat conformation of cis-1,3-dimethyl cyclohexane has two methyl groups in the equatorial positions and two hydrogens in the axial positions. This conformation occurs when the molecule is twisted about 120° from the chair conformation.
The twist-boat conformation is similar to the chair-boat conformation, except the twist is greater than 120°. In the twist-boat conformation, the two methyl groups are in the axial positions while the two hydrogens are in the equatorial positions.
Both of these conformations are stabilized by the intramolecular hydrogen bonding between the hydrogen and the methyl group. This hydrogen bonding helps to reduce the overall strain within the molecule, allowing the molecule to exist in either of these stable conformations.
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predict whether the following reactions are possible. Explain
your answers.
a. Ni(s) + MgSO4(aq) →→→→ NiSO4(aq) + Mg(s)
b. 3Mg(s) + Al₂(SO4)3(aq) →→→→ 3MgSO4(aq) + 2Al(s)
c. Pb(s) + 2H₂O(1)→→→→ Pb(OH)₂(aq) + H₂(g)
Help please!!!!
Answer:
A - not possible, B - possible, C- possible
Explanation:
You need to consider the reactivity series table. Check the attachment below.
A. If you see in the table, nickel is way below magnesium, meaning less reactive, and hence will not be able to snatch SO4 away from magnesium because it is not reactive enough so A is wrong.
B. Magnesium is more reactive than aluminium as mag appears right above alum, so yes possible.
C. Pb is lead which is more reactive than hydrogen so C is also possible.
Give the full electron configuration for nitrogen. electron configuration: || 1s2s2p
1s can only accommodate two electrons. For N, the next two electrons enter the 2s orbital. The 2p orbital will house the final three electrons. A 1s22s22p3 electron configuration will therefore be present in the N.
How do you determine the configuration of an electron?The shell number (n) is the first symbol used to represent an electron configuration, followed by the kind of orbital and the superscript number of electrons in the orbital. Consider this: The periodic table shows that oxygen has eight electrons.
What three principles govern electron configuration?In other words, we abide by the Aufbau Principle, Electron - electron Concept, and Hund's Rule.
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What is the Lewis symbol for Be2+? Select the correct answer below: :Be2+ :Be2+ Be2+ Be2+
The Lewis symbol for Be2+ is Be2+.
Beryllium is a neutral element that means the no. of electron sand no. of protons they are same. It has two valence electrons. Be lost two negative charges. They will lose two electrons. Be having most stable electronic configuration.
Beryllium is a steel gray metal which is quite brittle at a room temperature, and its chemical properties somewhat resemble with aluminum. They do not occur in a free nature. Be are used in many industries like; Ceramic manufacturing, automotive as well as areospace. Be is a group 1 carcinogen. It is a divalent element which occurs naturally only in combination with the other elements to form a mineral.
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a 10.0 gram sample of impure silicon is 99.44% silicon by mass and the rest is carbon. the mass of carbon present in the sample is:
(E) 0.056 g weight of carbon in the sample is the answer that is correct.
Is silicon a type of metal or not?Silicon is really a metalloid, a material that falls somewhere between the two categories of metals and non-metals. There is no clear definition of what falls under the category of metalloid, although in general, metalloids exhibit characteristics from both metallic and non-metals.
Given mass percent of silicon = 99.44 %
So, mass percent of carbon = (100-99.44) %
= 0.56 %
Hence, mass of carbon = 0.56 % of 10 g
= (0.56/100)×10 g
= 0.056 g
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The Complete Question is :
a 10.0 gram sample of impure silicon is 99.44% silicon by mass and the rest is carbon. The mass of carbon present in the sample is: Select one: OA. 9.944 grams OB. 99.44 grams OC. 0.56 grams O D. 5.6 x 10³ grams O E 0.056 grams
what will the concentration of cd2+ at the moment before fe2+ begins to precipitate?
Express the molar concentration numerically.
Before starting the titration, add a little quantity of Fe3+ to that same analyte's solution. any test curve that coincides with the concentration change.
What does an element's concentration mean?The amount of solute contained in a specific amount of solution is the substance's concentration. The number of molecules or solute throughout 1 L of solution, or molarity, is used to express concentrations. Thus, [Kr]4d10 [K r] 4 d 10 would represent the condensed subsurface electronic structure of Depth comprehension+ C d 2 +. We can see from the diagram of something like the neutral cadmium molecule above that even after the removal of the 5s electrons, all of the remaining orbitals are still occupied with 2 electrons.
What does solution concentration mean?A It is a measurement of the amount of one substance is diluted with another. This can be used to describe any kind of compound, but it's most usually used to describe solutions, where it relates to how much solute has been dissolved in what seems like a solvent.
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Explain why the Vmax of the reaction is much lower with non-competitive inhibitor than reaction without inhibitor or with competitive inhibitor at high substrate concentrations.
The Vmax of the reaction is much lower with non-competitive inhibitor than reaction without inhibitor or with competitive inhibitor at high substrate concentrations because of noncompetitive inhibitor can only bind to an enzyme with or without a substrate at several places at a particular point in time
The substrate still binds to the enzyme in the presence of noncompetitive inhibitors. In fact, the binding of the substrate and inhibitor to the enzyme is completely unaffected by one another. The enzyme, however, is unable to catalyze the reaction to produce a product when the inhibitor is attached. Noncompetitive inhibition works by lowering the quantity of active enzyme molecules available to carry out a process.
In non-competitive inhibition, a different site on the enzyme is the spot where the inhibitor molecules interact with the substrate molecules rather than the active sites on the enzyme surface. As a result, there are less enzyme molecules available to catalyze the reaction. Thus, V m an x is decreased. Because of this, extra substrate cannot entirely overcome the non-competitive inhibitors. As a result, the reaction's V max decreases.
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The level of water in an olympic size swimming pool (50.0 meters long, 25.0 meters wide, and about 2.00 meters deep) needs to be
lowered 1.50 cm. if water is pumped out at a rate of 4.60 liters per second, how long will it take to lower the water level 1.50 cm?
Olympic size: At a rate of 4.60 liters per second, it would take 543,478.2608 seconds (or about 6.5 days) to remove 2.50 m^3 of water.
What is Olympic?The Olympic Games are a major international multi-sport event featuring both summer and winter sports, held every four years. The modern Olympic Games were first held in Athens, Greece in 1896. The International Olympic Committee (IOC) organizes the Games and oversees the host cities. As the premier global sporting event, the Olympics feature more than 200 nations participating in a wide variety of sports
The volume of an Olympic size swimming pool is 50.0 m x 25.0 m x 2.00 m = 2500 m^3. To lower the water level by 1.50 cm, we need to remove a volume of 2.50 m^3 (1.50 cm/100 cm x 2500 m^3).
At a rate of 4.60 liters per second, it would take 543,478.2608 seconds (or about 6.5 days) to remove 2.50 m^3 of water.
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a compound is found to contain 53.70% iron and 46.30% sulfur. Find The Empirical Formula Of A Compound Containing 53.70% Iron And 46.30% Sulfur
Fe2S3 is The Empirical Formula Of A Compound Containing 53.70% Iron And 46.30% Sulfur.
Fe = 0.961 mol and S = 1.44 mol, Now divide them to get lowest empirical formula. When the subscripts in a chemical formula represent the simplest ratio of the kinds of atoms in the compound, the formula is called an empirical formula.
Most ionic compounds are described with empirical formulas. A molecular formula describes the actual numbers of atoms of each element in a molecule. A compound that contains ions and is held together by ionic bonds is called an ionic compound. The periodic table can help us recognize many of the compounds that are ionic:
When a metal is combined with one or more nonmetals, the compound is usually ionic. This guideline works well for predicting ionic compound formation for most of the compounds typically encountered in an introductory chemistry course. However, it is not always true (for example, aluminum chloride, AlCl3, is not ionic).
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classes of hydrocarbons in the most reactive
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A ga occupie a volume of 400cm³ at 500k and 1 atmophere preure. What will be the temperature of the ga when the volume and preure of the ga i 100cm³ and 0. 5 atmophere repectively
The temperature will be 62.5K when the volume and pressure of the ga 100cm³ and 0. 5 atmosphere.
What is stated by the combined gas law?The ratio of the product of the original pressure and volume to the original temperature will equal the ratio of the product of the new pressure and volume to the new temperature, or, according to a commonly used version of the combined gas law.
What are the three gas laws?According to Boyle's Law, gas volume grows as pressure lowers. According to Charles' Law, a gas expands in volume as its temperature rises. Additionally, Avogadro's Law states that as the number of gases increases, so does the volume of the gas.
From the combined gas law equation:
p1V1/T1 = p2V2/T2
where p1 - initial pressure, V1 - initial volume, T1 - initial temperature, p2 - final pressure, V2 - final volume, T2 - final temperature.
T2 = p2V2T1 / p1V1
As a result:
T2 = (0.5 atm × 100 cm3 × 500 K) / (1 atm × 400 cm3) = 62.5 K
T2 = 62.5 K
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At 850 K the equilibrium constant for the following reaction is Kc = 15 M-1.
2SO₂(g)+O₂(g)⇌ 2SO₃(g)
If we mix the following concentrations of the three gases, predict in which direction the net reaction will proceed toward equilibrium.
Left
No Change
Right
(SO₂)=0.20 M
O₂ = 0.60 M
(SO₃)=0.60 M
(SO₂)=0.18 M
O₂ = 0.10 M
(SO₃)=0.50 M
(SO₂)=0.70 M
O₂ = 0.80 M
(SO₃)=0.13 M
Chemical Equilibrium:
A chemical equilibrium is the reversible state of a chemical reaction system in which the concentrations of reactants and products do not change significantly with time. This state has a constant "K" dependent on temperature and the concentrations present at equilibrium. The reaction quotient "Q" is determined the same way but is for concentrations away from equilibrium. The relation between "K" and "Q" is an indicator in which way the reaction will proceed towards equilibrium.
When the reaction moves to the right to reach the chemical equilibrium, which is represented by the equation 2 SO2(g) + O2(g) 2 SO3(g) Kc=15, O2 = 0.80 M will be present.
What is an illustration of chemical equilibrium?is a condition in which the forward reaction rate is equal to the backward reaction rate. "A state where the concentration of reactant and product remains constant" is another definition of OR. For instance, H2(g)+I2(g)HI (g).
What does GCSE chemical equilibrium entail?When anything is said to be in equilibrium, it refers to a balanced state. It describes a state in chemistry when the concentrations of the reactants and products are stable. Equilibria, the plural form of the word, is used to describe the study of concentrations in chemical reactions.
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beryllium fluoride is an ionic compound with the following formula: bef2 what are the charges of beryllium (be) and fluorine (f) ions in this compound?
The beryllium ion has a charge of +2 and the fluorine ion has a charge of -1.
What is fluorine?Fluorine is a chemical element on the periodic table with an atomic number of nine and a symbol of F. It is the most reactive of all elements, and is the only element that forms compounds with all other elements. It is a pale yellow gas with a pungent odor. It readily forms compounds with most metals and nonmetals, and is found in many minerals. Fluorine is used in industries such as glass, ceramics, and aluminum production. It is also used to produce uranium fuel for nuclear power plants. Fluorine is widely used in toothpaste, mouthwash, and other dental products to prevent tooth decay.
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A) 2Fe3+(aq)+3Sn(s)->2Fe(s)+3Sn2+(aq)
B) O2(g)+2H2O(l)+2Cu(s)->4OH-(aq)+2Cu2+(aq)
C) Br2(l)+2I-(aq)->2Br-(aq)I2(s)
Calculate the equilibrium constant for each of the reactions at 25 degrees celcius
*Express your answer using one significant figure.
K=?
0.14-0.036) x 6 = 0.624 0.624/.0592 = 10.54054054 At 25 degrees Celsius, each reaction's equilibrium constant is 1010.54054.
What does Celsius stand for?Degree (Celsius) (Celsius) Temperature measurements are frequently made using the degree Celsius. Celsius degrees are represented by the sign °C. The freezing and boiling points of water are used to form the Celsius scale, with 0°C and 100°C respectively.
What makes degrees Celsius so special?It bears the name Celsius in honor of the Swedish scientist Hans Celsius (1701–1744), who initially proposed the temperate scale in 1742. The estate's Latin name, celsus, which means "mound," became the surname.
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0.14-0.036) x 6 = 0.624 0.624/.0592 = 10.54054054 At 25 degrees Celsius, each reaction's equilibrium constant is 1010.54054.
What makes degrees Celsius so special?It bears the name Celsius in honor of the Swedish scientist Hans Celsius (1701–1744), who initially proposed the temperate scale in 1742. The estate's Latin name, celsus, which means "mound," became the surname.
A) (0.14-0.036) x 6 = 0.624
0.624/.0592 = 10.54054054
10^10.54054054 = 3.47 x 10^10 or 3.0 x 10^10 .
B) (.40-.34) x 4 = .24
.24/.0592 = 4.054054054
10^4.054054054 = 1.13 x 10^4 or 1.0 x 10^4 .
C) (1.09-.54) x 2 = .55
.55/.0592 = 18.58108108
10^18.58108108 = 3.81 x 10^18 or 4.0 x 10^18 .
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what amount of heat is required to convert 10.1 g of an unknown liquid that has a molar mass of 83.21 g/mol at 19.2 celcius to a gas at 93.5 degrees celcius. the specific heat capacity of the liquid is 1.58 j/g celcius. specific heat capacity of gas
The amount of heat is required to convert 10.1 g of an unknown liquid that has a molar mass of 83.21 g/mol to a gas is found to be 3680 J.
How do you figure out how much heat is needed to turn a liquid into a gas?1. The amount of energy needed to increase a liquid's temperature from 19.2° to 57.3°. q = mCT q = heat =? m = mass = 10.1 g C = specific heat of liquid = 1.58 J/go
T = temperature change = 57.3 - 19.2 = 38.1 o q = (10.1 g) (1.58 J/go) (38.1 o) = 608
2. The temperature needed to turn a liquid into a gas at 57.3 degrees (phase change)
q = m
Hvap = enthalpy of vaporisation = 22.5 kJ/mol x 1 mol / 83.21 g = 0.2704 kJ/g = 270.4 J/g q = (10.1 g)(270.4 J/g) = 2731 J. Hvap = heat =? m = mass = 10.1 g
3. The amount of heat needed to increase the gas' temperature from 57.3° to 93.5° q = mCT q = heat =? the gas's specific heat is 0.932 J/go and the mass is 10.1 g. T = temperature change = 93.5o - 57.3o = 36.2o q = (10.1 g)(0.932 J/go)(36.2o) = 341 J
4. To determine the overall amount of heat required, add the heats from each step.
608 J + 2731 J + 341 J = 3680 J
By specific heat, what is meant?One gramme of a substance's temperature can be raised by one degree Celsius by applying a certain amount of heat, or specific heat. Calories or joules per gramme per degree Celsius are frequently used as the units of specific heat. For instance, water has a specific heat of 1 calorie (or 4.186 joules) per gramme per degree Celsius.
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What amount of heat (in kJ) is required to convert 10.1 g of an unknown liquid (MM = 83.21 g/mol) at 19.2 °C to a gas at 93.5 °C? (specific heat capacity of liquid = 1.58 J/g･°C; specific heat capacity of gas = 0.932 J/g･°C; ∆Hvap = 22.5 kJ/mol; normal boiling point, Tb = 57.3°C)
three moles of an ideal monatomic gas are at a temperature of 345 k. then, 2438 j of heat is added to the gas, and 962 j of work is done on it. what is the final temperature of the gas?
The final temperature of gas is approximately 436 K . if three moles of an ideal monatomic gas are at a temperature.
What are monatomic atoms?Monoatomic (monatomic): A molecule composed of just one atom, and lacking any covalent bonds. The noble gases (He, Ne, Ar, Kr, Xe, and Rn) are all monoatomic, whereas most other gases are at least diatomic.
What is monatomic or diatomic?Complete answer: Monatomic gas is the gas that has molecules containing a single atom only while diatomic gas has the molecule containing two atoms. Similarly, triatomic gas contains molecules with three atoms. The hydrogen gas exists as a diatomic molecule, as it contains two atoms of hydrogen.
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Which of the following nuclear processes results in an increase in the number of neutrons in the product element? 1. Alpha emission II. Beta emission III. Positron emission IV. Electron capture O A) III and IV O B) II, III, and IV OC) | and II O D) I, II, III, and IV OE) I, II, and I
The atomic number of an element increases as a result of beta decay, where one of the neutrons in the nucleus abruptly transforms into a proton.
What are nuclear reactions?Atoms occasionally transform abruptly into whole other atoms without prior notice since they aren't content with being who they are. Nuclear reactions, which transform one nucleus into another nucleus, are based on this inexplicable shift from one sort of element into another. Nuclear reactions take place when the ratio of protons and neutrons in an atom's nucleus changes, much way chemical reactions do when molecules exchange electrons, transforming one compound into another.Protons can sometimes be forced out of the nucleus or transformed into neutrons in certain nuclear processes.When an element's atomic number (number of protons) changes, so does its name since we determine what it is called by looking up the element's number on a periodic table and then reading off its name. Since an atom of potassium (atomic number 19) can abruptly change into an atom of calcium, nuclear processes resemble alchemy in this regard (atomic number 20). We'll discuss more about the radiation discharge in a moment, but that is the only indication that anything has changed.To Learn more About beta decay refer To:
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Match the following.
drag the appropriate labels to their respective targets. note: not all labels will be used.
Ionic Bond Lil =
hydrogen bonding CH3OH =
ion-dipole forces CH3CH3 =
H2 + H20 CH2F2 =
dispersion forces Lil + H20 =
dipole-dipole forces
LiI consists of ionic bond, CH3OH contains hydrogen bond, CH3CH3 contains London dispersions forces, CH2F2 has both dipole-dipole and London dispersion forces and Lil + H20 consists of ion-dipole forces.
Ionic bonds are seen in molecules made primarily of metallic materials. When an ionic molecule is dissolved in a polar solvent, such as the solution, ion-dipole forces are at play. It is noticed between polar molecules and charged ions. The strongest intermolecular link between atoms is the hydrogen bond, which can form between O, N, or F. Polar molecules have dipole-dipole forces but lack O-H, N-H, or F-H bonds. All molecules experience London dispersion, which is only seen in nonpolar molecules.
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Which of the following could be the identity of a white crystalline solid that exhibits the following properties?-It melts at 320°C.-It does not conduct electricity as a solid.-It conducts electricity in an aqueous solution.C6H12O6(s)NaOH(s)SiO2(s)Cu(s)
The white crystalline solid which exhibits a melting point at -320°C and will not conduct electricity is NaOH
Manufacturers can use sodium hydroxide to make soap, rayon, paper, explosive products, dyes, and petroleum products. Other jobs where sodium hydroxide can be used include processing cotton cloth, cleaning and processing metals, oxide plating, electroplating, and electrowinning. Many metal hydroxides such as LiOH, NaOH, KOH, and Ca(OH)2 are bases. Non-metallic hydroxides like hypochlorous acid (HOCl) are acids.
Properties of sodium hydroxide
Sodium hydroxide in its pure form is a white crystalline solid. Odorless.Soluble in water, glycerol, and ethanol. ...It has a higher viscosity than water, about 78 mPas.Multiple hydrates can be formed.Learn more about the crystalline solid in
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if your water heater can supply 40 kbtu/h (thats kilo-btu/h), how long will it take to heat this water?
If a water heater can supply 40 KBTU/h then it will take 35.64 second to heat the water. This is calculated using the specific heat of water and the power concept.
The electrical energy is used totally depends on the total power used by all the electrical devices and the total time they are used. One kilowatt hour is equal to 1000 watts of power used for one hour of time.
time taken= energy required/ power delivered
System is used to define the measurement of a physical quantity. It is termed as the unit. Different types of unit measurement systems used are the SI unit system, MKS unit system, Imperial unit system, British unit system, etc.
1 BTU = 1055.6 J
Specific heat of water Cw. = 4186 J/Kg.
Time taken = energy required / power
= 100 . Cw. / 1055.6 * 40*
= 100 * 4186 / 1055.6 * 40 .
= 9.9 * hours
= 35.64 sec
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a mixture of coarse sand and sugar is 45.0 percent sand by mass. 120.0 grams (g) of the mixture is placed in a fine-mesh cloth bag and dunked repeatedly in lake michigan. after drying, the mass of the contents of the bag equals:
After drying, the mass of the contents of the bag equals is X=54g if 45.0 percent sand by mass. 120.0 grams of the mixture is placed in a fine .
Why does mass mean?6vmass, the central act of worship of the Roman Catholic Church, which culminates in celebration of the sacrament of the Eucharist. The term mass is derived from the ecclesiastical Latin formula for the dismissal of the congregation .
What's mass in physics?mass, in physics, quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force. The greater the mass of a body .
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