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defon
3 years ago
8

A gas is enclosed in a cylinder fitted with a piston. The volume of the gas is 2.00 L at 0.524 atm. The piston is moved to incre

ase the gas pressure to 5.15 atm. Which of the following is a reasonable value for the volume of the gas at the greater pressure?
A) 0.20 L
B) 0.40 L
C) 1.00 L
D) 16.0 L
Chemistry
1 answer:
MAXImum [283]3 years ago
3 0

Answer:0.20L

Explanation:

Data

P1 =0.524atm

V1=2L

P2=5.15atm

V2=?

Apply Boyle' law

P1V1 =P2V2

P2 =P1V1/P2

= 0.524x 2 /5.15

= 0.20 L

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Answer:

Chemical formula is CoCl. 3H₂O

Explanation:

Data Given

Percentage of water = 45.43%

Percentage of CoCl. = 54.57%

Chemical Formula of the hydrates = ?

Solution:

First, find the mass of each of the part ( CoCl and water) in 100 g of the Compound.

Mass of CoCl = 28 + 35.5

Mass of CoCl = 63.5

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Now find how many moles are there for each element in 100 g of compound

So,

The percentage will be count in grams for 100g in compound

Find the moles in total compounds

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mole of CoCl = mass of CoCl / Molar mass of CoCl

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mole of CoCl = 0.859

Formula Used for H₂O

mole of H₂O = mass of H₂O/ Molar mass ofH₂O

mole of H₂O = 45.43 g / 18 g/mol

mole of  H₂O = 2.539

Now

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Divide each one by the smallest number of moles

CoCl = 0.859 / 0.859

CoCl = 1

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H₂O = 2.539  / 0.859

H₂O = 3

Multiply the mole fraction to a number to get the whole number.

CoCl =  1

H₂O  = 3

So,  

The Chemical formula is CoCl. 3H₂O

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