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konstantin123 [22]
3 years ago
10

Before you can find the mass, what do you need to know?

Chemistry
2 answers:
Oxana [17]3 years ago
5 0

Answer:

you need to know what you're finding the mass of.

Explanation:

This is just one example. There are probably more out there, but this is one thing my parents taught me. Hope this helps, and tell me if I'm wrong!

Dmitrij [34]3 years ago
3 0

Answer:The easiest way to find the mass of anything is to weigh it. You're actually measuring the force of gravity on the object, and technically, you should divide the weight by the acceleration due to gravity to get the mass.

Explanation:

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bagirrra123 [75]
What is the question is it a fill in the blank multiple choice?
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3 years ago
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A solution is prepared from 26.7 g of an unknown compound and 116.2 g acetone, C3H6O, at 313 K. At this temperature the vapor pr
Cloud [144]

Answer:

The molecular weight of the unknown compound is 267.7 g/mol

Explanation:

Lowering vapor pressure → Colligative property where the vapor pressure of solution is lower than vapor pressure of pure solvent

ΔP = P° . Xm

0.526 atm - 0.501 atm = 0.025atm

0.025 atm = 0.526 atm . Xm

Xm = 0.025 atm / 0.526 atm → 0.0475 (mole fraction)

Mole fraction = Moles of solute / Total moles (solute + solvent)

0.0475 = Moles of solute / Moles of solute + Moles of solvent

We determine the moles of solvent → 116.2 g . 1mol / 58 g = 2 moles

0.0475 = Moles of solute / Moles of solute + 2

0.0475 moles of solute + 0.095 = Moles of solute

0.095 = Moles of solute - 0.0475 moles of solute

0.095 / 0.9525 = Moles of solute → 0.0997 moles

Molas mass = g/mol → 26.7 g / 0.0997 mol = 267.7 g/mol

4 0
3 years ago
Give two test substances that would react with each other to produce salt and water​
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Answer:

NaOH +HCl==>Nacl+H2O

KOH+HCl==>KOH+H2O

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What would you need to lower to change a gas to a liquid
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The temperature or the average kinetic energy of the molecules

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What causes a liquid to change into vapor
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The molecules in the water become more separated due to heat.

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