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erica [24]
3 years ago
5

How do total bond energy and

Chemistry
1 answer:
Colt1911 [192]3 years ago
3 0

Answer:

All chemical reactions involve energy. Energy is used to break bonds in reactants, and energy is released when new bonds form in products. Endothermic reactions absorb energy, and exothermic reactions release energy. The law of conservation of energy states that matter cannot be created or destroyed.

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Hydrogen peroxide is used as a cleaning agent in the treatment of cuts and abrasions for several reasons. it is an oxidizing age
valkas [14]
Given:

<span>BaO2(s) + 2 HCl(aq) => H2O2(aq) + BaCl2(aq) 
</span>
Mass of barium peroxide = 1.49 g Volume of HCl solution = 25.1 mLConcentration of HCl solution = 0.0279 g HCl per mL

Solution: To determine the amount of hydrogen peroxide that would be produced, we use need to determine which is the limiting reactant and use the initial amount of this reactant for the calculations. 

0.0279 g HCl / mL ( 25.1 mL ) ( 1 mol HCl / 36.46 g HCl) ( 1 mol BaO2 / 2 mol HCl ) = 0.0096 mol BaO2 needed
1.49 g BaO2 ( 1 mol / 169.3 g BaO2 ) ( 2 mol HCl / 1 mol BaO2 ) = 0.0176 mol HCl needed

Therefore, the limiting reactant would be barium peroxide since it is consumed completely first in the reaction.

1.49 g BaO2 ( 1 mol BaO2 / 169.3 g BaO2 ) ( 1 mol H2O2 / 1 mol BaO2 ) ( 34.02 g H2O2 / 1 mol H2O2 ) = 0.299 g H2O2
3 0
4 years ago
Help plz! its a science question
Tresset [83]

Iron fillings can be separated as they are magnetic. Use a magnet to separate the iron fillings away.

Salt can be separated away as they are soluble in water.

3 0
3 years ago
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The volume of a 2.49 g sample of gas is 752 mL at 1.98 atm and 62 C What is the gas?
creativ13 [48]

Answer:

The volume of a sample of gas (2.49 g) was 752 mL at 1.98 atm and 62∘C 62 ∘ C .

6 0
3 years ago
What happens when Barium (Ba), in group 2, reacts with oxygen (O) which is in group 6?
Digiron [165]

Answer: barium oxide

Explanation: The barium will give some of it's electrons up to the oxygen, and then they will both reach the stability of a noble gas. Then, they will both combinate to barium oxide, so the answer is barium oxide.

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still need help with this?

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2 years ago
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