60cm3 of hydrogen are sparked with 20cm3 of oxygen at 100°C and 1 atmosphere. The total volume of the residual gases is?

EZEUKWU PRINCEWILL CHIGOZIE

10 years ago

The answer is very correct.

Solution

2H2 + O2 ===». 2H2O

2. : 1. :2

If. 20cm3 of oxygen was given,then it would require 40cm3 of hydrogen to form 40cm3 of water.

Volume of unused hydrogen=60-40=20cm3

Residual volume=volume produced +volume left

=40cm3+20cm3

=60cm3 of residual gas

Danniboi1

7 years ago

Since, 20cm3 of oxygen was given
Then 40cm3 of hydrogen will be required to give 40cm3 of water
Therefore leaving 20cm3 of hydrogen as excess
Residual=40+20=60cm3

Ummuafnaan46

3 years ago

2H2 +O2 ===>>2H2O
2 : 1 : 2
60cm3 :20cm3 : -----(at the beginning of the reaction)
40cm3 : 20cm3 : 40cm3
subtracting the equation
20cm3 : 0cm3 : 40cm3
The residual gases = 60cm3

Eheazu

11 years ago

please I still don't understand....need help

agadido

3 years ago

pls why did we use the volume of oxygen to calculate, why not volume of hydrogen

darkypearl

12 years ago

aw is dis calculated pls

owomike

12 years ago

vol of residual gas=vol of excess gas +vol of gas produced

Edefua

1 year ago

I believe the answer is wrong. I think it is 20cm^3

Adelani Adedeji

11 years ago

addition of residual 20cm*3 frm d hydrogen gas nd residual 20cm*3 frm water gives 40cm*3

godoski

9 years ago

the sunset ought to be B because reaction would be between one mole of hydrogen and one mole of oxygen that is 30cm³ of H reacting with 20cm³ of oxygen. the gas left will be 30-20=10cm³

samiland

9 years ago

the answer is correct

Adelani Adedeji

11 years ago

d ansa shuld be 40- 2H20 +02 -2H20....2 moles of hydrogen gas reacts with 1 mole of oxygen yieldin 2moles of water.....sinz onli 20cm*3 is used in in oxygen....and it iz 1 mole.....d volume used in hydrogen wil be 2(20) sinz it is 2 moles makin 40cm....d residual gas hre is 20.....on d oda syd dre are 2 moles of water 2(20)makin 40....20cm is also left addition of dz gives 40cm*3