Advertisements
Advertisements
प्रश्न
Calculate the relative molecular masses of the following
(NH4)2 Cr2O7
[At mass : C = 12, H = 1, O = 16, Ci = 35.5, N = 14, Cu = 63.5, S = 32, K = 39, Pt = 195, Ca = 40, P = 31, Mg = 24]
Advertisements
उत्तर
For Relative Molecular Mass, (NH₄)₂Cr₂O₇
= 2(14 + 4 × 1) + 2 × 52 + 7 × 16
= 2 × 18 + 104 + 112
= 36 + 216
= 252
APPEARS IN
संबंधित प्रश्न
Calculate the molecular mass of Cl2.
What is meant by saying that ‘the molecular mass of oxygen is 32’ ?
Calculate the molecular masses of the following :
Carbon dioxide, CO2
(Atomic masses : H = 1 u ; O = 16 u ; Cl = 35.5 u ; N = 14 u ; C = 12 u)
How many molecules are present in one gram molecular mass of a substance ?
Convert 12 g of oxygen gas into moles.
Calculate the relative molecular masses of the following
CHCI3
[At mass : C = 12, H = 1, O = 16, Ci = 35.5, N = 14, Cu = 63.5, S = 32, K = 39, Pt = 195, Ca = 40, P = 31, Mg = 24]
What are ionic and molecular compounds? Give examples.
Write the formulae for the following and calculate the molecular mass for each one of them.
- Caustic potash
- Baking powder
- Limestone
- Caustic soda
- Ethanol
- Common salt
The modem atomic mass scale is based on ______.
Write the name of the following compound and deduce its molecular mass.
MgCl2
