EASY
11th CBSE
IMPORTANT
Earn 100

In three moles of ethane C2H6, calculate the following:

Number of moles of carbon atoms.
(Only mention the number, not the unit)

10% studentsanswered this correctly

Important Questions on Some Basic Concepts of Chemistry

MEDIUM
11th CBSE
IMPORTANT

In three moles of ethane C2H6, calculate the following:

The number of moles of hydrogen atoms. 

MEDIUM
11th CBSE
IMPORTANT

In three moles of ethane C2H6, calculate the following:

The number of molecules of ethane. 

MEDIUM
11th CBSE
IMPORTANT
What is the concentration of sugar (C12H22O11) in mol L-1 if its 20 g are dissolved in enough water to make a final volume up to 2 L?
(0.03/0.3)
MEDIUM
11th CBSE
IMPORTANT
lf the density of methanol is 0.793 kg L-1, what is its volume needed for making 2.5 L of its 0.25 M solution?

(Provide correct answer upto two decimal places and no need to mention units).

MEDIUM
11th CBSE
IMPORTANT
Pressure is determined as force per unit area of the surface. The SI unit of pressure, Pascal is as shown below:
1Pa=1N m-2
If the mass of air at sea level is 1034 g cm-2. Calculate the pressure in Pascal. 
EASY
11th CBSE
IMPORTANT
What is the SI unit of mass? How is it defined?
EASY
11th CBSE
IMPORTANT
Match the following prefixes with their multiples:
Prefixes Multiples
(i) Micro 106
(ii) Deca 109
(iii) Mega 10-6
(iv) Giga 10-15
(v) Femto 10
EASY
11th CBSE
IMPORTANT
What do you mean by significant figures?