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katovenus [111]
3 years ago
9

It rate of effusion of a particular gas was measured and found to be 24.0 ml/min. under identical conditions the rate of effusio

n of methane gas was measured and found to be 47.8 ml/min. what is the molar mass of the unknown gas?
Chemistry
1 answer:
hram777 [196]3 years ago
3 0

The molar mass of unknown gas is 63.5 g/mol

calculation

let the unknown gas be represent by letter Y  

The rate of effusion of a gas varies inversely with square root of molar mass

that is R(CH4)/ R(Y)= √[(M(Y)/M(CH4)]

= 47.8 ml/min/24.0ml/min= √[(Y/16g/mol)]

square both side to remove square root sign

=47.8²ml/min /24²ml/min= Y/16 g/mol

=2284.84ml/min/576ml/min=Y/16g/mol

multiply both side by 16

y =63.5 g/mol


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Solid Iron (III) reacts with oxygen gas to form iron (III) oxide, which is the compound we see when rust is present. Based on th
Sunny_sXe [5.5K]

Answer:

Option E is correct. none of the above is correct

Explanation:

Step 1: Data given

Solid Iron (III) = Fe^3+

iron (III) oxide = Fe2O3

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Molar mass Fe2O3 = 159.69 g/mol

Step 2: The balanced equation:

4Fe + 3O2 → 2Fe2O3

4 moles of iron will need 2 moles of oxygen gas to fully react

⇒ This is false 4 moles of iron will need 3 moles of oxygen gas to fully react

B.12 moles of iron, if reacted completely, can produce 8 moles of iron (III) oxide.

⇒ This is false: When 12 moles of iron completely react, we can produce 12/2 = 6 moles of Fe2O3

C.9 moles of oxygen can produce 9 moles of Iron (III) oxide

⇒ This is false; 9 moles of O2 can produce 6 moles of Fe2O3

D.6 moles of oxygen can react completely to produce 6 moles of iron (III) oxide.

⇒ This is false 6 moles of O2 will react completely to produce 4 moles of Fe2O3

E.none of the above

6 0
3 years ago
How do I find density
skad [1K]
Divide mass by the volume to find density.
7 0
3 years ago
Given 1kg=2.20 lbs, how many kilograms are in 125 lbs?<br> (Metric conversion)
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Answer:

56.82 Kg

Explanation:

Given data:

1 Kg = 2.20 lbs

Number of kilogram in 125 lbs = ?

Solution:

lbs is used for pound. lb is abbreviation of libra. It is Latin word meaning balance.

Both kilogram and pounds are units of mass. Pound is smaller unit than kilogram.

one Kg = 2.20 lbs

Number of kg in 125 lbs:

125 lbs × 1 Kg/2.20 lbs

125 lbs.Kg/2.20 lbs

56.82 Kg

7 0
3 years ago
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7 0
3 years ago
How do i calculate the mass of CO2 emitted per Kj of heat produced in a combustion reaction?
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your set up is:
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your answer 0.06058 grams of CO2 produced per kJ released.
6 0
3 years ago
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