Which energy transformation occurs when anelectrolytic cell is in operation?
(1) chemical energy → electrical energy
(2) electrical energy → chemical energy
(3) light energy → heat energy
(4) light energy → chemical energy

Answers

Answer 1

Answer: The correct answer is option 1. The operation in an electrolytic cell transforms energy from chemical energy to electrical energy. This is a cell which electrolysis occurs to produce electrochemical reaction and eventually producing an electric current.

Answer 2

Answer:

(2) electrical energy -> chemical energy

Explanation:

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Gold has a density of 19.3 g/cm3. What is the mass, in kilograms, of one cubic meter of gold?

Answers

The mass of one cubic meter of gold is 19,300 kilograms.

We can use the specified density and the following formula to determine the mass of one cubic meter of gold:

Mass = Density × Volume

Given:

Density of gold = 19.3 g/cm³

Remember that when converting from cubic centimeters to cubic meters, 1 cubic meter is equal to 1,000,000 cubic centimeters.

Density = Mass / Volume

Mass = Density × Volume

Volume = 1 cubic meter = 1,000,000 cubic centimeters

Density = 19.3 g/cm³

Mass (grams) = Density × Volume = 19.3 g/cm³ × 1,000,000 cm³ = 19,300,000 g

For converting grams to kilograms, divide by 1000:

Mass (kilograms) = 19,300,000 g / 1000 = 19,300 kg

Therefore, the mass of one cubic meter of gold is 19,300 kilograms.

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Answer:

Explanation:

Question:

Gold has a density of

19.3

What is the mass, in kilograms, of one cubic meter of gold?

Density:

The density of an object is a quantity derived from the relation between mass (fundamental quantity) and volume (derived quantity). No matter the size of the object, its density will be the same because it is a constant property that is only varied when changing the mass or volume of the object. There are other factors that affect density such as temperature and pressure.

Data:

Volume:

Density:

19.3

Equation:

The equation to find the mass of the gold is given...

See full answer below.

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Answers

Activation energy is the energy needed to start a chemical reaction. The correct answer to the given question is option b. activation energy.

The energy needed to get a reaction started is called the activation energy. It is the minimum amount of energy required for a chemical reaction to occur. Activation energy is needed to break the existing bonds in reactant molecules and form new bonds to produce product molecules.

The correct answer to the given question is option b. activation energy.

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The energy needed to get a reaction started is the activation energy.

A catalyst speeds up a reaction, as well as an enzyme, and chemical energy is just a form of energy.

Answer: Activation energy

Methane (CH4, 16.05 g/mol) reacts with oxygen to form carbon dioxide (CO2, 44.01 g/mol) and water (H2O, 18.02 g/mol). Assume that you design a system for converting methane to carbon dioxide and water. To test the efficiency of the system in the laboratory, you burn 5.00 g methane. The actual yield is 6.10 g water. What is your percent yield?

Answers

Answer:

The percent yield of reaction is 54.32%.

Explanation:

$CH_4+3O_2\rightarrow CO_2+2H_2O$

Moles of methane = $(5.00 g)/(16.05 g/mol)=0.3115 mol$

According to reaction, 1 mole of methane gives 2 moles of water .

The 0.3115 moles of methane will give:

$(2)/(1)* 0.3115 mol=0.623 mol$ of water

Mass of 0.9345 moles of water = 0.623 mol × 18.02 g/mol = 11.23 g.

Theoretical yield of methane = 11.23 g.

Experimental yield of methane = 6.10 g.

The percent yield of reaction:

$\%(Yield)=\frac{\text{Experimental yield}}{\text{Theoretical yield}}* 100$

The percent yield of reaction is :

$\%(Yield)=(6.10 g )/(11.23 g)* 100=54.32\%$

Answer:54.5

Explanation:

True/False: A virus could have a mutation that makes it more transmissible (higherchance of spreading).

Answers

Answer True

Explanation:

1. For each of the following numbers, by how many places must the decimal point bemoved to express the number in scientific notation?
II. For each number, will the exponent be positive, negative, or zero?
0.0000089911

Answers

The number that you have shown the exponent would be negative and I believe it would be 6 places so 8.9911 x 10^-6

The results of an investigation are the
(Blank)

Answers

Answer: ending results

Explanation:

Final answer:

The results of an investigation are the observations and data collected during an experiment or research, which may be qualitative or quantitative. For example, the results of a plant growth experiment could include measurements and descriptions of the plants under different light conditions.

Explanation:

The results of an investigation are the findings obtained from carrying out an experiment or research. An investigation seeks to answer a question, test a hypothesis, or solve a problem. The results constitute the data collected and analyzed, which may be quantitative (numerical) or qualitative (descriptive) in nature. For example, if you conduct an investigation to determine the effect of light on plant growth, your results might include measurements of plant height, color intensity, and a description of leaves condition at different light exposures.