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Luda [366]
2 years ago
7

Write an importance of endothermic reactions​

Chemistry
1 answer:
KengaRu [80]2 years ago
8 0

Answer:

the uses of exothermic reactions are:

1) lighting of stove

2) self heating cans

3) hand warmers

4) in some case exothermic process can be used to cook food such as rice  (by adding calcium oxide to water heat is evolved and it helps to cook food )

Explanation:

hope this helps you pls mark me as brainilst

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Suppose a 10.0 mL sample of an unknown
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The concentration of HCl is equal to 2.54mol/L.

<h3>Mole calculation</h3>

To solve this question, one must use the molarity calculation, which corresponds to the following expression:

                                               M = \frac{mol}{v}

Thus, to find the molarity of the sample, the following calculations must be performed:

V_f = 10ml + 625ml = > 635ml

                                              \frac{0.004mol}{xmol} =\frac{1000ml}{635ml}

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So, 0.00254 moles were added per 10ml, so we can do:

                                              \frac{0.00254mol}{xmol}= \frac{10ml}{1000ml}  \\x = 2.54mol/L

So, the concentration of HCl is equal to 2.54mol/L.

Learn more about mole calculation in: brainly.com/question/2845237

6 0
2 years ago
PLEASE HELP NOOWWW I WILL GIVE BRAINLIEST
Misha Larkins [42]

Answer:

c

Explanation:

5 0
2 years ago
What is the original source of most energy used on Earth?
ser-zykov [4K]

Answer:

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Explanation:

Energy from the sun. Solar energy is the original source of most energy on Earth. There are many ways we use energy from the Sun.

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