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3 years ago

The disinfectant hydrogen peroxide (H2O2)

Chemistry

1 answer:

Blababa [14]3 years ago

4 0

Answer:

1.1 mol of O2

Explanation:

First we need the balance chemical equation which is

2 H2O2 -------> 2 H2O + O2

This is important because in stoichiometry you can go from units of one thing to other by using mole ratios, here the mole ratio is 2 mol of H2O2 for one mole of O2.

$2.2 mol H2O2 \frac{1mol O2}{2 mol H2O2}$ = 1.1 mol of O2

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Please help

KonstantinChe [14]

Answer: There are 0.5 grams of barium sulfate are present in 250 of 2.0 M $BaSO_{4}$ solution.

Explanation:

Given: Molarity of solution = 2.0 M

Volume of solution = 250 mL

Convert mL int L as follows.

$1 mL = 0.001 L\\250 mL = 250 mL \times \frac{0.001 L}{1 mL}\\= 0.25 L$

Molarity is the number of moles of solute present in liter of solution. Hence, molarity of the given $BaSO_{4}$ solution is as follows.

$Molarity = \frac{mass}{Volume (in L)}\\2.0 M = \frac{mass}{0.25 L}\\mass = 0.5 g$

Thus, we can conclude that there are 0.5 grams of barium sulfate are present in 250 of 2.0 M $BaSO_{4}$ solution.

7 0

2 years ago

If a sample of air in a school container was heated, would the percentage of oxygen in the air increase, decrease, or remain unc

Viktor [21]

Answer:

increase

Explanation:

Let's suppose we have a sample of air in a closed container. We heat the container and we want to predict what would happen to the pressure.

According to Gay-Lussac's law, the pressure of a gas is directly proportional to its absolute temperature.

Thus, if we increased the temperature of the air by heating it, its pressure would increase.

If a sample of air in a closed container was heated, the total pressure of the air would increase.

5 0

2 years ago

Which best describes a similarity between power plants that use water as an energy source and those that use wind as an energy s

elixir [45]

Answer:

Both use kinetic energy to produce electricity.

6 0

2 years ago

Identify the item that does not have kinetic energy.

d1i1m1o1n [39]

Answer:

Explanation:

there is no other answer choice that does not move. This is a fool-proof question because all the other answer choices contain movement except the butterfly resting

4 0

2 years ago

PLEASE HELP ME I BEG YOU I DONT UNDERSTAND A THING

Andrew [12]

low level waste

Explanation:

Low level wastes are nuclear wastes generated from hospitals and industries as well as the nuclear fuel cycle, and is comprised of paper, rags, tools, clothing, filters, etc., which contain small amounts of mostly short-lived radioactivity.

Low level wastes are typically radioactive in nature and are difficult to dispose.
They originate from radioactive processes in the hospital and nuclear reactors.
There has been growing concerns about the safe disposal of radioactive wastes over the years.

They are made up of materials with short lived radioactivity.

Learn more:

Transmutation brainly.com/question/3433940

#learnwithBrainly

7 0

2 years ago