Advertisements
Advertisements
Question
Which of the following would weigh most?
Options
1 mole of H2O
1 mole of CO2
1 mole of NH3
1 mole of CO
Solution
1 mole of CO2
Explanation:
Molecular mass of H2O = (1 x 2) + 16 = 18 g
Molecular mass of CO2 = 12 + (2 x 16) = 44 g
Molecular mass of NH3 = 14 + (3 x 1) = 17 g
Molecular mass of CO = 12 + 16 = 28 g
∴ 1 mole of CO2 having maximum molecular mass will weigh more.
APPEARS IN
RELATED QUESTIONS
What weight of sulphuric acid will be required to dissolve 3g of magnesium carbonate?
[Mg = 24, C =12, 0 = 16 ]
MgCO3 + H2SO4 → MgSO4 + H2O+ CO2
What is the mass of nitrogen in 1000Kg of urea [CO(NH2)2] ?
[H = 1, C= 12, N= 14, O = 16]
Samples of the gases O2, N2, CO2 and CO under the same conditions of temperature and pressure contain the same number of molecules represented by X. The molecules of Oxygen, occupy V litres and have a mass of 8 g. Under the same conditions of temperature and pressure :
What is the mass of CO2 in g?
The reaction of potassium permanganate (VII) with acidified iron (II) sulphate is given below:
2KMno4 + 10FeSO4 + 8H2O → K2SO4 + 2MnSO4 + 5Fe2(SO4)3 + 8H2O
If 15.8g of potassium permanganate (VII) was used in the reaction, calculate the mass of iron (II) sulphate used in the above reaction.
Calculate the percentage of nitrogen in aluminium nitride. [Al = 27, N = 14]
What is the vapour density of ethylene? (Avogadro's number = 6 x 1023; Atomic weight of C = 12, H = 1; Molar volume = 22.4 litres at STP)
The equation for the burning of octane is:
\[\ce{2C6H18 + 25O2 -> 16CO2 + 18H2O}\]
If the relative molecular mass of carbon dioxide is 44, what is the mass of carbon dioxide produced by burning two moles of octane?
Calculate the relative molecular mass of:
CH3COONa
Calculate the relative molecular mass of:
(NH4)2 Cr2O7
The mass of 5.6 litres of a certain gas at S.T.P. is 12 g. What is the relative molecular mass or molar mass of the gas?
