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Elenna [48]
3 years ago
10

Please help me thanks?!?:)

Chemistry
2 answers:
yawa3891 [41]3 years ago
4 0

Answer:

the last one

Explanation:

when the temperature increases it accelerates the spoiling process

dmitriy555 [2]3 years ago
3 0

Answer:

D

Explanation:

The first thing that comes to my mind is a refrigerator.

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slavikrds [6]

Answer:

A Winter storm usually does not come with a warm fronthey warm front.

Explanation:

When the front passes over an area it means to change in the weather. Many. Many friends cause weather events such as rain thunderstorms gusty winds tornadoes and hurricanes.

5 0
2 years ago
How do you find the molar mass of calcium carbonate??
exis [7]
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CaCO3:
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Give the number of particles of each element in NH3, ammonia.
Y_Kistochka [10]
You'll need Avogadro's number for this. NH3 has 1 Nitrogen and 2 Hydrogen. You'll multiply the molar mass of each times Avogadro's number. So:

molar mass N x 6.022x10^23 x 1 Nitrogen= total A

Molar mass H x 6.022x10^23 x 2 Hydrogen= total B

Add total A+B = your answer

I don't have a calculator or periodic table but if you plug in the numbers you'll get your answer. Hope it helps.
3 0
4 years ago
Which of the following is the best description of a chemical reaction?
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