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Naily [24]
4 years ago
12

1. The "3" in 3 CaCl2 is called the:

Chemistry
1 answer:
vovangra [49]4 years ago
7 0
The 3 in 3CaCl2 it the coefficient
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An endothermic process is one in which heat is ________ from the surroundings. (2 points)
Marina CMI [18]
The answer is 1) gained
Always <span><span>think "into" for "endo" (energy goes in), and "exit" for "exo" (energy is released).</span> </span>

Hope it helps ^-^

7 0
3 years ago
If the relative humidity is high and the temperature drops, water vapor may
meriva

If the water vapor content stays the same and the temperature drops, the relative humidity increases. If the water vapor content stays the same and the temperature rises, the relative humidity decreases. This is because colder air doesn't require as much moisture to become saturated as warmer air.

6 0
3 years ago
9. What is useful in constructing scientific questions, methods, and explanations?
Varvara68 [4.7K]

Answer: C

creativity

Explanation:

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3 0
3 years ago
Calculate the morality for the following<br> 10.5 kg of Na2 SO4. 10H2O in 18.60 L
Serggg [28]

Answer:

1.75M

Explanation:

The problem deals with finding the molarity of the given compound.

 The compound is:

             Na₂SO₄.10H₂O

Mass of the compound  = 10.5kg  = 10500g

Volume of the compound  = 18.6L

Molarity is the number of moles of solute in a solution;

     Molarity  = \frac{number of moles }{volume}  

 Number of moles  = \frac{mass}{molar mass}  

 Molar mass of   Na₂SO₄.10H₂O  = 2(23) + 32 + 4(16) + 10[2(1) + 16]

                                                       = 322g/mol

 Now;

    Number of moles  = \frac{10500}{322}   = 32.6mole

So;

  Molarity  = \frac{32.6}{18.6}   = 1.75M

5 0
3 years ago
How are electrons excited and what happens when the electrons relax
serg [7]
<span>When electrons are excited they get more energy and jump to higher orbitals. As they loose that energy that had excited them in the beginning, they tend to return to their original orbitals and the color that is given off is when this is occurring. </span>
4 0
3 years ago
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