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bonufazy [111]
2 years ago
10

What type of reaction occurs without the addition of heat?

Chemistry
1 answer:
yawa3891 [41]2 years ago
3 0

Answer:

A.an endothermic reaction

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A(n) ____________ acts to increase the hydrogen ion concentration of a solution. A(n) ____________ acts to decrease the hydrogen
lesya692 [45]

Answer:

Explanation:

An <u>acid</u> acts to increase the hydrogen ion concentration of a solution. A <u>base </u>acts to decrease the hydrogen ion concentration of a solution. A <u>buffer</u> acts to maintain a relatively stable concentration of hydrogen ions in a solution. As the hydrogen ion concentration of a solution decreases, the pH <u>rises</u>. As the pH of a solution increases, the concentration of <u>hydroxide</u> ions increases. The pH of a solution is defined as the<u> negative logarithm</u> of the hydrogen ion concentration.

6 0
4 years ago
a wet 43.2 g sample of copper sulfate heptahydrate is heated until only copper sulfate remains. the mass of the water lost is 34
andreyandreev [35.5K]

Answer:

9.1g

Explanation:

Given parameters:

Mass of copper sulfate heptahydrate  = 43.2g

Mass of water lost  = 34.1g

Unknown:

Mass of copper sulfate = ?

Solution

The copper sulfate heptahydrate is made up of the copper sulfate and water of crystallization which makes it wet.

Mass of copper sulfate heptahydrate  = mass of copper sulfate + mass of water

Mass of copper sulfate = mass of copper sulfate heptahydrate - mass of water

Mass of copper sulfate = 43.2g  - 34.1g = 9.1g

3 0
3 years ago
Chlorine forms from the reaction of hydrochloric acid with manganese(IV) oxide. The balanced
JulijaS [17]

Answer:a) HCl

b) 22.9g

c) 18.11g

Explanation:

7 0
3 years ago
Which forces can be represented in a free body diagram
Lilit [14]
I think external forces acting on an object may include friction, gravity, normal force, drag, tension, or a human force due to pushing or pulling can be represented by a free body diagram.
6 0
3 years ago
Which compound has the highest precent composition by mass of strontium?
PilotLPTM [1.2K]
First find the molar masses of all of the compounds:
SrCl2 = 158.53g/mol
SrI2 = 341.43g/mol
SrO = 103.62g/mol
SrS = 119.68g/mo

Then find the molar mass of Sr in each of the compounds. Since there is only one Sr in every compound, the mass will be the same: 87.62g/mol Sr

Now divide the molar mass of Sr by each of compounds' masses:
SrCl2 = (87.62)/(158.53) = 0.553
SrI2 = (87.62)/(341.43) = 0.257
SrO = (87.62)/(103.62) = 0.846
SrS = (87.62)/(119.68) = 0.732

Now multiply each of the results by 100 to get the percent composition of Sr by mass:
(0.553)(100) = 55.3% Sr in SrCl2
(0.257)(100) = 25.7% Sr in SrI2
(0.846)(100) = 84.6% Sr in SrO
(0.732)(100) = 73.2% Sr in SrS

Thus SrO has the highest percent composition by mass of Sr
4 0
3 years ago
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