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Ulleksa [173]
3 years ago
14

Write a sentence that descrices how to determine the number of moles of a compound in known mass of a

Chemistry
1 answer:
sattari [20]3 years ago
6 0

Explanation:

<u>Moles is denoted by given mass divided by the molecular mass ,  </u>

Hence ,  

n = w / m

n = moles ,  

w = given mass ,  

m = molecular mass .

For example ,

For  a compound X ,

The given mass i.e. w = 20 g

and the molecular mass ,i.e. , m = 10 g / mol

Then the moles can easily be calculated by using the above formula ,

n = w / m

n = 20 g / 10 g/mol = 2 mol

Hence , answer = 2 mol.

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Jlenok [28]
The study of all chemicals containing carbon is organic chemistry.
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2 years ago
How does the type of liquid used to make ice cubes affect the rate at which it melts?
3241004551 [841]
It doesn’t affect it
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Name this compound Cr2(CO3)3
kiruha [24]

Answer:

Molecular Weight

Explanation:

Chromium(III) Carbonate Cr2(CO3)3 Molecular Weight -- EndMemo.

5 0
3 years ago
A 2.87 g sample of carbon reacts with hydrogen to form 3.41 g of car fuel. What is the empirical formula for the car fuel?
olga_2 [115]

CH₇ is the empirical formula of the car fuel.

Explanation:

To find the empirical formula we use the following algorithm.

First divide each mass the the molar weight of each element:

for carbon 2.87 / 12 = 0.239

for hydrogen 3.41 / 2 = 1.705

And now divide each quantity by the lowest number which is 0.239:

for carbon 0.239 / 0.239 = 1

for hydrogen 1.705 / 0.239 = 7.13 ≈ 7

The empirical formula of the car fuel is CH₇.

I have to tell you that in reality this formula is wrong because is not possible to exist. However the algorithm for finding the empirical formula is right, the problem may reside in the amounts of carbon and hydrogen given.

Learn more about:

empirical formula

brainly.com/question/5297213

#learnwithBrainly

5 0
2 years ago
What is the current in the 30 ohm heating coil of a coffee maker that operates on a 120 volt circuit?
SpyIntel [72]

Answer:

4Amps. i can't see other questions clearly

Explanation:

using  ohms law  \\ v = ir

  • V=120 volt
  • R=30ohms
  • I=?

I=V/R

I=120/30

I=4amps

8 0
3 years ago
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