1. Use the following information to answer 3 questions. When heated in a closed container in the presence of a catalyst, potassium chlorate decomposes into potassium chloride and oxygen gas via the following reaction:
2KClO3(s) → 2KCl(s)+ 3O2(g)
If 12.25g potassium chlorate decomposes, how many grams of oxygen will be release?
(A) 1.60 g (B) 3.20 g
(C) 4.80 g (D) 18.37 g

Answer: 4.88 g/mol. and helium

Explanation:

To find the molar mass of the gas, we can use the ideal gas law equation which is PV=nRT where:

P = pressure = 2.000 atm

V = volume = 50.00 L

n = number of moles

R = gas constant = 0.08206 L·atm/K·mol

T = temperature = 273.15 K

First, we need to find the number of moles of the gas:

PV = nRT

n = PV/RT

n = (2.000 atm)(50.00 L)/(0.08206 L·atm/K·mol)(273.15 K)

n = 1.844 mol

Now, we can find the molar mass of the gas by dividing its mass by the number of moles:

molar mass = mass/number of moles

mass = 9.00 g

molar mass = 9.00 g/1.844 mol

molar mass = 4.88 g/mol

Therefore, the molar mass of the gas is 4.88 g/mol.

To determine what gas this is, we can compare the molar mass of the gas to the molar masses of known gases. The molar mass of 4.88 g/mol is closest to that of helium (4.00 g/mol). Therefore, this gas is most likely helium.

To design a device for turning salt water into freshwater, we can leverage the processes involved in the water cycle, particularly evaporation and condensation.

The first step in the process is evaporation. By subjecting salt water to heat, we can initiate the evaporation process, just as the sun's heat causes water bodies to evaporate in nature.

The heat source can be provided by solar energy or through other means such as thermal energy. As the salt water is heated, the water molecules transition from a liquid state to a gaseous state, leaving the salt and other impurities behind.

The next step is condensation. The water vapor generated during evaporation needs to be collected and condensed back into a liquid form. This can be achieved by cooling the vapor, causing it to condense into freshwater. The condensed freshwater can then be collected and stored for use.

To enhance the efficiency of the process, additional techniques such as membrane filtration or reverse osmosis can be employed. These methods involve passing the salt water through a semipermeable membrane that allows the water molecules to pass through while trapping the larger salt particles and impurities.

By combining evaporation, condensation, and filtration techniques, a device can be designed to effectively convert salt water into freshwater. Such devices are commonly known as desalination plants or desalination units. They are utilized in areas where access to freshwater is limited, such as coastal regions with abundant seawater resources but scarce freshwater supplies.

For more such questions on evaporation visit:

https://brainly.com/question/24258

#SPJ8

Explanation:

Percent by mass is mass of the solute in 100 g of the solution.

So in this case:

mass of solute = 20.1

mass of solution = 513

The expression for calculating the percentage by mass is: % (m/m) = (mass of solute) / (mass of solution) x 100.

So:

% m/m = (20.1/513)*100

% m/m = 3.92%

Answer: % m/m = 3.92%

We are given:

Acceleration of the object (a) = 8.2 m/s²

Force applied on the object (F) = 20.1 newtons

Mass of the object (m) = m kg

Solving for the mass of the object:

From newton's second law of motion:

F = ma

replacing the variables

20.1 = m * 8.2

m = 20.1/8.2

m = 2.45 kg

Hence, the object weighs 2.45 kg

The concentration of H3O+ ions in the solution of aluminum chloride is \(3.16×10^-5\) mol/L.

Aluminum chloride is an acidic salt that contains a cation, Al3+, and an anion, Cl-. When aluminum chloride is dissolved in water, it dissociates into its constituent ions, and the Al3+ cations hydrolyze to produce H+ ions.

This reaction leads to the formation of an acidic solution. The pH of a solution of aluminum chloride is \(4.5×10^0\). We need to determine the concentration of H3O+ ions in this solution.

The concentration of H3O+ ions in a solution is given by the equation: pH = -log[H3O+] where pH is the negative logarithm of the concentration of H3O+ ions in the solution. The negative sign indicates that the pH is inversely proportional to the concentration of H3O+ ions. To determine the concentration of H3O+ ions, we need to rearrange the equation:

[H3O+] = \(10^-pH\) Substituting the value of pH =\(4.5×10^0\), we get: [H3O+] = \(10^-4.5\)

The value of \(10^-4.5\) can be calculated using scientific notation: \(10^-4.5\)= \(3.16×10^-5\) mol/L

for more such questions on  concentration

https://brainly.com/question/28564792

#SPJ8

Answer:

  -172.6 °C

Explanation:

You want to know the Celsius equivalent of the temperature 100.6 K.

The relation is ...

  C = K - 273.15

  C = 100.6 -273.15 = -172.55

The temperature is -172.55 °C, about -172.6 °C.

__

Additional comment

We have rounded to tenths, because that is precision of the temperature given. If you use 273 as the conversion constant, you will get -172.4.

1) Write the chemical equation.

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 1

Cl: 1

List the elements (or polyatomic ions) in the reactants.

K: 1

P: 1

O: 4

H: 3

Cl: 1

2) Balance K.

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 1

Cl: 1

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 3

Cl: 3

3) Balance Cl.

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 3

Cl: 3

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 3

Cl: 3

4) The balanced chemical equation.

.

Both Example A and Example B are correct, but they refer to different processes. Example A refers to the physical action of chopping vegetables into smaller pieces, which can make them easier to cook and eat.

This process does not change the fundamental nature of the vegetable, but simply alters its physical properties.

Example B, on the other hand, refers to the process of digestion in the human body. During digestion, food is broken down into simpler forms, such as sugars, amino acids, and fatty acids, which can be absorbed and used by the body for energy and other functions. This process involves both physical and chemical changes, as enzymes in the digestive system break down complex molecules into simpler ones.

In summary, Example A describes a physical process that alters the size and shape of a vegetable, while Example B describes a physiological process that breaks down complex food molecules into simpler forms for use by the body. Both processes are important for preparing and consuming nutritious food.

for more such question   vegetables

https://brainly.com/question/18134846

#SPJ11

Scientist A's claim is more accurate, as it takes into account the additional water needed to produce the extra amount of oxygen required for the 6-month mission.

To determine the grams of water needed to meet the oxygen demands, we need to use the stoichiometry of the chemical equation for the production of oxygen in water electrolysis:

2H2O → 2H2 + O2

For every 2 moles of water consumed, 1 mole of O2 is produced. The molar mass of water is 18.015 g/mol, and the molar mass of O2 is 31.998 g/mol.

Therefore, the amount of water needed to produce 1 gram of O2 is:

(2 moles H2O / 1 mole O2) x (18.015 g H2O / 1 mole H2O) = 36.03 g H2O/g O2

To find out how many grams of water are needed for a 6-month mission, we need to know how many people are involved in the mission. Let's assume it is one person.

Scientist A claims that 170,300 g of water are needed for a 6-month mission, or approximately 28,383 g of water per month, or 946 g of water per day.

Using our stoichiometry calculation, we can determine that this amount of water would produce:

946 g H2O/day ÷ 36.03 g H2O/g O2 = 26.24 g O2/day

Over a 6-month period, this would result in a total oxygen production of:

26.24 g O2/day x 30 days/month x 6 months = 4,732.8 g O2

On the other hand, Scientist B claims that only 127,500 g of water are needed for a 6-month mission, or approximately 21,250 g of water per month, or 708.3 g of water per day.

Using our stoichiometry calculation, we can determine that this amount of water would produce:

708.3 g H2O/day ÷ 36.03 g H2O/g O2 = 19.65 g O2/day

Over a 6-month period, this would result in a total oxygen production of:

19.65 g O2/day x 30 days/month x 6 months = 3,537 g O2

Therefore, Scientist A's claim is more accurate, as it takes into account the additional water needed to produce the extra amount of oxygen required for the 6-month mission.

Learn more on stoichiometry here https://brainly.com/question/14935523

#SPJ1

Consumers are organisms which depend on the producers or autotrophs for their food and nutrition.

Consumers are also known as heterotrophs, and they feed on the producers (autotrophs or self-feeders or plants) and herbivores (animals that eat plants) for food and energy. They don't produce their own food.

There are four types of consumers:

1) Primary – Herbivores are known as primary consumers and their source of food is plants or the first trophic level of the food chain. Example, Rabbits, Butterflies, Zooplanktons, etc.

2) Secondary – these consumers eat both plants and herbivores and are therefore also known as omnivores. Example, Ants, Crabs, Rats, Humans, etc.

3) Tertiary – these consumers eat primary and secondary consumers. Thus, they can be omnivores as well as carnivores. Example, Hawks, Snakes, Lions, etc.

4) Quaternary – these consumers prey on the tertiary consumers. Example, Polar bear, Alligator, etc.

Learn more about Consumers here:

https://brainly.com/question/13420317

#SPJ9

Na is for sodium and SO4 is sulfate...

Answer: The chemical compound name for Na₂SO₄ is Sodium Sulfate.

1. C) Molarity is indirectly related to volume.

2. A) The CaCl2 beaker has more ions in solution.

3. the molarity of the NaCl solution is 0.0513 M.

Step 1: Convert 30g of NaCl to moles.

The molar mass of NaCl is 58.44 g/mol. To convert 30 g to moles, divide by the molar mass:

30 g NaCl / 58.44 g/mol = 0.513 mol NaCl

Step 2: List Given and asking information.

Given:

Mass of NaCl = 30g

Volume of solution = 10.0L

Asking:

Molarity of the solution = ?

Step 3: set Molarity Formula and plug the mole/ Volume into the formula.

Molarity = moles of solute / volume of solution

Molarity = 0.513 mol / 10.0 L = 0.0513 M

Therefore, the molarity of the NaCl solution is 0.0513 M.

Learn more about molarity at

https://brainly.com/question/14469428

#SPJ1

The emission of a transmitter is caused by the action of calcium ions, which also cause synaptic vesicle exocytosis, which releases the neurotransmitters inside the vesicles and starts synaptic transmission.

Nearly all bodily biological processes, including heart and muscle pulses, neurotransmission of information, memories and learning baby creation, cell proliferation, and Calcium ions enter the cytoplasm of organelles through calcium channels.

Calcium plays a critical role in the brain's regulation of synaptogenesis and memory formation. This process activates certain calmodulin signal transmission pathways and involves important protein effectors such CaMKs, MAPK/ERKs, or CREB.

To know more about Calcium ions visit:

https://brainly.com/question/28186243

#SPJ4

Answer:

Hubble's law says that the universe is expanding outward.

Explanation:

Actually Hubble's law was discovered before the Big Bang theory was formulated. The Big Bang Theory is an attempt to explain the observations that led to Hubble's Law.Before the 1900s the theory was that the universe was eternal and self existent. The idea was that the universe was in a steady state having always existed and would always continue to exist. Albert Einstein even changed the equations in his general theory of relativity to reflect the idea of a steady state. Later he called putting in a fudge factor to result in a steady state the worse mistake of his life.

Hubble observed that most of the universe has a red shift indicating that the universe is expanding and moving away from itself. The further out that the universe is observed the faster it is moving apart.

These observations were inconsistent with a steady state universe.

The Big Bang theory extrapolated backwards. If the universe is expanding and spreading out from itself then further back in time the universe was closer together. The Theory explained Hubble's observations by the idea that at the beginning of time ( for our universe) all the matter and energy were together in one place.

This super dense ball of matter and energy then exploded outwards creating space and time as it is presently observed. The question was would the forces of gravity and black holes bring the matter and energy back together again. The answer found in 1998 was no. The rate of the expansion of the universe is increasing not slowing down and the universe will not collapse back into the super dense ball of matter that it began as.

The Big Bang Theory postulated based on the empirical evidence that our universe had a beginning and it will eventually cease to exist. The conclusion based on Hubble's observations is that matter and energy are not eternal and self existent.

Answer:B

Explanation:

Tetrahedral I took the test

Answer:

B is the answer'

Explanation:

To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. Therefore,  coefficient of Al in balanced equation is 2.

Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.

The other characteristic of balanced reaction is that physical state should be written with each compound or molecule on reactant and product side. Physical state should be written in brackets. s means solid, l means liquid, g means gas.

Al(s)→Al³⁺(aq)+3e⁻      × 2

Zn²⁺(aq)+2e⁻−→Zn(s)  × 3

adding the two equations we get balanced equation as

2Al+3Zn²⁺→ 2Al³⁺ + 3Zn(s)

The coefficient of Al in balanced equation is 2.

Therefore,  coefficient of Al in balanced equation is 2.

Learn more about the balanced equation, here:

https://brainly.com/question/7181548

#SPJ1

Answer:

6 N to the left, or -6 N
unbalanced

Explanation:

The forces are two 3 N forces. The forces are additive, so 3+3 = 6, so the answer is 6 N to the left.
Since the net force isn't 0, the forces are unbalanced (aka the block will move since there is a force pushing the block)

The number that matches the power of ten is given below:

The value of numbers expressed in the power of ten is that number multiplied or divided by the given power or exponent of 10.

Writing numbers in powers of 10 is described as writing in standard form.

For a number written in powers of 10, if the power of ten is positive, the number is multiplied by 10 the number of times found in the power of 10. However, if the power of ten is negative, the number is divided by 10 the number of times found in the power of 10.

For example:

10⁵ = 1 * 10 * 10 * 10 * 10 * 10 * 10 = 100000

10⁻³ = 1 ÷ 10 ÷10 ÷ 10 = 0.001

Learn more about standard form at: https://brainly.com/question/19169731

#SPJ1

The description of an ideal gas is as follows:

An ideal gas is a theoretical gas composed of many randomly moving particles that do not engage in any inter-particle interactions.

An ideal gas obeys all the gas laws and possess the following characteristics:

Learn more about gas laws at: https://brainly.com/question/1437490

Answer:

-They have no mass.

-They have no volume.

-They have no intermolecular forces.

Explanation:

Answer:

We can use the combined gas law to solve this problem:

(P1V1/T1) = (P2V2/T2)

where:

P1 = 1 atm (pressure of nitrogen gas in the first container)

V1 = 300 cm^3 (volume of the first container)

T1 = 3°C + 273.15 = 276.15 K (temperature of the nitrogen gas in the first container, converted to Kelvin)

P2 = 0.8 atm (pressure of nitrogen gas in the second container)

V2 = ? (volume of the second container, what we want to find)

T2 = 25°C + 273.15 = 298.15 K (temperature of the nitrogen gas in the second container, converted to Kelvin)

Plugging in the values, we get:

(1 atm x 300 cm^3) / 276.15 K = (0.8 atm x V2) / 298.15 K

Simplifying and solving for V2, we get:

V2 = (1 atm x 300 cm^3 x 298.15 K) / (0.8 atm x 276.15 K)

V2 = 1309.5 cm^3

Therefore, the volume of the larger container is approximately 1309.5 cm^3.

The amount of volume of KOH solution that should be added to make 500mL of a 0.300M solution is 200mL.

The volume of a solution given the concentration can be calculated using the following expression;

CaVa = CbVb

Where;

According to this question, we are to calculate how many mL of a 0.75 M OH solution that should be added to a 500 mL flask to make 500 mL of a 0.300 M KOH solution.

0.75 × Va = 500 × 0.3

0.75Va = 150

Va = 150/0.75

Va = 200mL

Learn more about volume at: https://brainly.com/question/14710169

#SPJ1

Carbohydrates, lipids, proteins, and nucleic acids are the 4 types of organic molecules.

The simplest organic compounds are hydrocarbons, which carry only carbon and hydrogen. Alkanes contain hardly carbon–hydrogen and carbon–carbon single bonds, alkenes hold at least one carbon–carbon double bond, and alkynes contain molecules with one or more carbon–carbon triple bonds.

Four main classes of organic molecules—carbohydrates, lipids, proteins, and nucleic acids—are debated in the following sections. Examples of organic molecules are hydrocarbons, aliphatic amalgam, aromatic and alicyclic compounds, polymers, biomolecules, and buckyballs. collate inorganic molecules.

So we can conclude that organic compounds are carbohydrates, fats (lipids), proteins, and nucleic acids.

Learn more about organic molecules here: https://brainly.com/question/26556885

#SPJ1

To construct the solubility curve, we must first determine the maximum amount of Ce2(SO4)3 that can dissolve in 100 grams of water at 10°C, which is approximately 20 grams.

To find the mole fraction of the solute in a solution of 4 m CaCl2, we need to first calculate the moles of CaCl2 present in 1 kg (1000 g) of the solution:

moles of CaCl2 = molality x mass of solvent (in kg)

= 4 mol/kg x 1 kg

= 4 mol

Next, we need to find the total moles of solute and solvent in the solution:

moles of solute = 4 mol

moles of solvent = mass of solvent (in g) / molar mass of solvent

= 1000 g / 18.015 g/mol (molar mass of water)

= 55.49 mol

Therefore, the total moles of solute and solvent in the solution is:

total moles = moles of solute + moles of solvent

= 4 mol + 55.49 mol

= 59.49 mol

Finally, we can calculate the mole fraction of the solute:

mole fraction of solute = moles of solute / total moles

= 4 mol / 59.49 mol

= 0.0672

Therefore, the mole fraction of the solute in a 4 m CaCl2 solution is 0.0672.

To calculate the molality of an ethylene glycol solution with a molarity of 2.87 M, we need to use the formula:

molality = moles of solute/mass of solvent (in kg)

We can find the moles of solute by multiplying the molarity by the volume of the solution in liters:

moles of solute = molarity x volume (in L)

= 2.87 mol/L x 1 L

= 2.87 mol

We can find the mass of the solvent by using the density of the solution:

mass of solvent = volume of solution x density

= 1 L x 1.04 g/mL

= 1040 g

Converting the mass of the solution

a. 25 grams: This is a supersaturated solution because 25 g is more than the maximum amount of Ce2(SO4)3 that can dissolve in 100 grams of water at 10°C.

b. 10 g: Because 10 g is less than the maximum amount of Ce2(SO4)3 that can dissolve in 100 g of water at 10°C, this solution is saturated.

c. 5 g  Because 5g is less than 10g, this is an unsaturated solution.

As a result, the answers are: a. supersaturated, b. saturated, and c. unsaturated.

To know more about saturated visit:-

https://brainly.com/question/28215821

#SPJ4

Answer:

liquid to gas

Explanation:

when boiling water when evaporating heat is given out

Answer:

Starch is a viable indicator in the titration process because it turns deep dark blue when iodine is present in a solution. When starch is heated in water, decomposition occurs and beta-amylose is produced

The desired reaction is 2Al(s) + 3CO2 from Al2O3(s) + 3CO(g) (g) The reactions include 2 Al(s), 3/2 O2(g), and Al2O3(s), with H = 1675.7kJ. ————————— (1) CO(g) = CO2 + 1/2 O2(g) (g).

As a result, the enthalpies of a reactants and products are added together, and the result is used to compute the enthalpy of a reaction. This endothermic process generates and absorbs environmental heat if H is positive. This reaction is exothermic so emits heat into the environment if H is negative.

A negative H indicates that heat is transferred from the a system towards its surroundings, whereas a positive H indicates that heat is transferred from the surroundings into the system. An enthalpy of reaction (Hrxn) for a chemical reaction is the difference of enthalpy between the products and reactants; Hrxn is measured in kilojoules per mole.

To know more about reaction visit:

https://brainly.com/question/28984750

#SPJ1