Atoms and Molecules
Trending Questions
Q.
Which one of the following properties of an element can never be variable?
Valency
Atomic weight
Equivalent Mass
All the above
Q.
Mass of 1 atom of Hydrogen is _____
1.66
g
6.022
g
6.022
g
1.67
g
Q.
1 mole of He gas has 6.022×10x atoms. x is _____
20
23
25
30
Q.
Number of gram atoms of oxygen present in 0.3 mole of (COOH)2.2H2O is
0.9
18
1.8
9
Q. If we consider that 16, in place of 112, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will
- Decrease twice
- Increase two fold
- Remain unchanged
Be a function of the molecular mass of the substance
Q.
How many oxygen atoms are present in 50g of CaCo3 ?
12.044
6.022
3.011
9.033
Q.
Ratio of number of atoms in one mole of oxygen to ozone is _____
Q.
1 mole of N2 has _____ number of atoms
- 6.022 × 1023
- 3.011 × 1023
- 12.044 × 1023
- 6.022 × 1022
Q. How many molecules are present in 9g of water?
- 6.022× 1023
- 3.011× 1023
- 6.022× 1025
- 3.011× 1020
Q.
The specific heat of a metal is 0.16 its approximate atomic weight would be
32
16
40
64