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Oksanka [162]
2 years ago
7

BRAINLIEST, 5 STARS, AND THANKS!!!tapos na po ako Dyan katapos kulang ma answer

Chemistry
1 answer:
mezya [45]2 years ago
5 0

Answer:

before

1. Prepare a handy emergency supply kit

2. Know the earthquake hazard in your area

3. Familiarize yourself with the exit routes

During

1. Do the DUCK, COVER AND HOLD.

2. stay away from trees and posts.

3. stay clam

4. Don't enter damaged buildings

After

1. Check yourself and others for injuries

2. Monitor news through radio and Tv.

Hope this will help you.

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1 Calcium carbonate breaks down on heating to produce calcium oxide and carbon dioxide gas.
Alborosie

Answer:  See below

Explanation:

1.  a)  0.15 moles calcium carbonate  (15g/100g/mole)

   b)  0.15 moles CaO  (molar ratio of CaO to CaCO3 is 1:1)

   c)   8.4 grams CaO  (0.15 moles)*(56 grams/mole)

2. a)  0.274 moles Na2O  (17g/62 grams/mole)

   b)  46.6 grams NaNO3  (2 moles NaNO3/1 mole Na2O)*(0.274 moles Na2O)*(85 g/mole NaNO3)

7 0
3 years ago
What questions, if we were to answer them, would
Margarita [4]

Answer:

When our bodies are dry and wind blows by, we lose some energy to the air molecules. When are bodies are wet, we have a substance on our skin that likes to absorb heat. So when wind blows by, we lose a LOT of energy to the air molecules. When the body loses heat energy, our body temperature drops.

Explanation:

hope it helps

<u>plzz </u><u>mark</u><u> it</u><u> as</u><u> brainliest</u><u>.</u><u>.</u><u>.</u>

7 0
3 years ago
What is the chemical formula for aluminum selenide ?​
yulyashka [42]

Al2Se3 is your chemical formula

Hope this helps

God Bless you

-Kayla <3

7 0
3 years ago
Read 2 more answers
This is hard, isn't it? please help me though. PLEASE
Liono4ka [1.6K]
I think it might be A. i am not totally sure though
6 0
2 years ago
Calculate the number of molecules in 210 grams of H2O
spin [16.1K]
H2O=18.01g/mole. 210g divided by 18.01g/mole=11.653mole. 1 mole has 6.22x10^23 molecules. So there is 11.653x(6.22x10^23) molecules. Just multiply 11.653 by 6.22. Then put it as answerx10^23 molecules
4 0
3 years ago
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