3 years ago

Which of the following is an example of a chemical reaction?

Chemistry

1 answer:

nevsk [136]3 years ago

3 0

Answer:

where is the option I can't see plz give the option first the I try to give answer

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When a lead storage battery discharges, the concentration of ___.

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Answer:

Sulfuric acid decreases

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When an electron falls from an excited state to ground state, is energy released or absorbed?

strojnjashka [21]

Answer:

Energy is released.

Explanation:

When an electron absorbs energy, it moves up into an excited state. When it releases energy, it will return to the ground state.

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What is the molarity of a solution in which 7.1 g of sodium sulfate is dissolved in enough water to make 100. mL of solution?

Sidana [21]

Answer:

0.50 M

Explanation:

Given data

Mass of sodium sulfate (solute): 7.1 g

Volume of solution: 100 mL

Step 1: Calculate the moles of the solute

The molar mass of sodium sulfate is 142.04 g/mol. The moles corresponding to 7.1 grams of sodium sulfate are:

$7.1g \times \frac{1mol}{142.02g} = 0.050mol$

Step 2: Convert the volume of solution to liters

We will use the relation 1 L = 1000 mL.

$100mL \times \frac{1L}{1000mL} =0.100L$

Step 3: Calculate the molarity of the solution

$M = \frac{moles\ of\ solute }{liters\ of\ solution} = \frac{0.050mol}{0.100L} =0.50 M$

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Which color of white light bends the most when it is refracted by a prism?

hodyreva [135]

The violet light is the answer!

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3 years ago