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Fantom [35]
3 years ago
9

3) Find the mass, in grams, of 5.08 mol Ca(NO3)2

Chemistry
1 answer:
babunello [35]3 years ago
4 0

Answer:

833.12g

Explanation:

Use the mole=mass/mr equation (rearrange this to find mass)

Mr= 164

So, 5.08 x 164 = 833.12g

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Why is it important for science to keep testing a hypothesis even after they’ve found it to be true?
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Answer:

Explanation:

Repeated tests help determine whether the hypothesis is always true in different circumstances. Repeatedly testing a hypothesis qualifies it to be accepted as a theory.

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2 years ago
What is the Molar Mass of methylammonium bromide: Use the Periodic Table and round to the nearest hundredths.
egoroff_w [7]

The molar mass of methylammonium bromide is 111u.

<h3>What is molar mass?</h3>

The molar mass is defined as the mass per unit amount of substance of a given chemical entity.

Multiply the atomic weight (from the periodic table) of each element by the number of atoms of that element present in the compound.

Add it all together and put units of grams/mole after the number.

Atomic weight of H is 1u

Atomic weight of N is  14u

Atomic weight of C is  12u

Atomic weight of Br is  79u

Calculating molar mass of  2H_3NCH_3Br =2(1 x3+ 14+12+ 1 x 3 +79) = 111u

Hence, the molar mass of methylammonium bromide is 111u.

Learn more about molar mass here:

brainly.com/question/12127540

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8 0
2 years ago
Two people are trying to push a large box across a floor. Each person pushes with an equal amount of force. The total amount of
Charra [1.4K]

Answer:

C- 250+250= 500 newtons (the amount the both exerted) :)

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3 years ago
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The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must
alina1380 [7]

Answer:

The statement which best explains the change that must happen at the molecular level is below:

Explanation:

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