Advertisements
Advertisements
प्रश्न
Calculate the molecular masses of the following compounds :
Methanol, CH3OH
Advertisements
उत्तर
Given:
Atomic mass of C = 12 u
Atomic mass of O = 16 u
Atomic mass of H = 1 u
Therefore, molecular mass of CH3OH can be calculated as follows:
(1 ×12) + (4 × 1) + (1 × 16) = 32
Hence, molecular mass of methanol is 32 u.
APPEARS IN
संबंधित प्रश्न
Calculate the formula unit mass of ZnO given the atomic mass of:
- Zn = 65 u
- Na = 23 u
- K = 39 u
- C = 12 u
- O = 16 u
What is meant by saying that ‘the molecular mass of oxygen is 32’ ?
What is the significance of the formula H2O ?
Calculate the molecular masses of the following compounds :
Hydrogen sulphide, H2S
Calculate the molecular masses of the following :
Oxygen, O2
(Atomic masses : H = 1 u ; O = 16 u ; Cl = 35.5 u ; N = 14 u ; C = 12 u)
Calculate the molecular masses of the following compounds :
Ethene, C2H4
(Atomic masses : C = 12 u ; H = 1 u)
Calculate the formula masses of the following compounds :
Calcium carbonate
Calculate the formula masses of the following compounds :
- Calcium chloride
- Sodium carbonate
(Given : Atomic masses : Ca = 40 u ; Cl = 35.5 u ; Na = 23 u ; C = 12 u; O = 16 u)
Choose the correct answer from the options given below.
In water, the hydrogen-to-oxygen mass ratio is
Fill in the blank with the correct word from the options given below:
Relative molecular mass of an element/compound is the number of times one ________ of the substance is heavier than −1/12that the mass of an atom of carbon [C12].
