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3 years ago

A substance has a density of .80g/cm3 if you have 60cm3 what is the mass?

Chemistry

2 answers:

Dvinal [7]3 years ago

4 0

Answer:

168.56

Explanation:

Evgen [1.6K]3 years ago

3 0

Answer:

48 grams

Explanation:

If p and V are already given, calculate m by multiplying those two values.

m = pV

m = 4/5 * 60/1

m = 240/5

m = 48 grams

The mass of that substance is 48 grams.

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Firewood burns and ashes remain is it a chemical or physical change?

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4 years ago

Read 2 more answers

A 8.00 L tank at 26.9 C is filled with 5.53 g of dinitrogen difluoride gas and 17.3 g of sulfur hexafluoride gas. You can assume

pshichka [43]

Answer:

mole fraction of N_2 O = 0.330

mole of fraction SF_4 = 0.669

PRESSURE OF N_2 O = 39127.053 Pa

pressure of SF_4 = 792126.36

Total pressure = 118253.413 Pa

Explanation:

Given data:

volume of tank 8 L

Weight of dinitrogen difluoride gas 5.53 g

weight of sulphur hexafluoride gas 17.3 g

Amount of $N_2 O = \frac{5.53}{14*2 + 16} = 0.1256 mol$

amount of $SF_4 = \frac{17.3}{32.1 + 19*4} = 0.254 mol$

mole fraction of $N_2 O = \frac{0.1256}{0.1256 + 0.254} = 0.330$

mole of fraction $SF_4 = \frac{0.254}{0.1256 + 0.254} = 0.669$

PV = nRT

P of N_2 O $= \frac{0.1256 *8.31 (273 + 26.9}{0.008} = 39127.053 Pa$

mole of SF_4 $=\frac{0.254 *8.31*(273+26.9)}{.008} = 79126.36 Pa$

Total pressure = 39127.053 + 79126.36 = 118253.413 Pa

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3 years ago

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Now, to answer your question... Atoms are the smallest you can go while still having it be an element, hence the definition ''the basic unit of a chemical element.'' It is the smallest unit that has the chemical properties of an element. However, atoms still need these charges to be atoms. Without electrons, they'd just be ions. Hope this helps.

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3 years ago