Advertisements
Advertisements
Question
What is the significance of the formula H2O ?
Advertisements
Solution
The significance of the formula H2O is:
It represents one molecule of water.
It provides important information on the constituents of water i.e. hydrogen and oxygen, through the chemical formula.
It also provides information on the number of atoms of each element present in one molecule of water.
It refers to the presence of one mole of molecules of water; it refers to 6.022 × 1023 molecules of water.
APPEARS IN
RELATED QUESTIONS
Calculate the molecular mass of NH3.
Calculate the formula unit mass of K2CO3 given the atomic mass of
- Zn = 65 u
- Na = 23 u
- K = 39 u
- C = 12 u
- O = 16 u
Calculate the molecular masses of the following compounds :
Carbon disulphide, CS2
(Atomic masses : H = 1 u ; S = 32 u ; C = 12 u)
Convert 12 g of oxygen gas into moles.
Calculate:
The gram molecular mass of chlorine if 308cm3 of it at STP weighs 0.979 g.
Calculate:
The mass of oxygen in 2.2 litres of CO2 at STP.
Calculate the weight/mass of an atom of hydrogen.
Calculate the weight/mass of: `10^22` atoms of carbon
From the equation
\[\ce{3Cu + 8HNO3 -> 3Cu(NO3)2 + 4H2O + 2NO}\]
(Atomic mass Cu = 64, H = 1, N = 14,O = 16)
Calculate the mass of copper needed to react with 63g of HNO3.
What are ionic and molecular compounds? Give examples.
