What is the mass of 5 moles of sodium carbonate (Na₂CO₃)?(Atomic masses : Na = 23 u ; C = 12 u ; O = 16 u)

Academic Chemistry NCERT Class 9

Number of moles of sodium carbonate (Na2CO3) = 5 moles

Molar mass of sodium carbonate = (2 × 23) + (1 × 12) + (3 × 16) = 106g

Mass of 5 moles of sodium carbonate = 5 × 106 = 530g

Therefore, 5 moles of sodium carbonate weigh 530 grams.

Tutorialspoint

Simply Easy Learning

Updated on: 10-Oct-2022

520 Views

Calculate the formula unit masses of ZnO, Na2O, K2C03, given atomic masses of Zn = 65 u, Na = 23 u, K = 39 u, C = 12 u, and O = 16 u.
Calculate the molecular mass of ethanoic acid, CH3COOH.(Atomic masses : C = 12 u; H = 1 u; O = 16 u)
Calculate the formula masses of the following compounds :(i) Sodium oxide, Na2O(ii) Aluminium oxide, Al2O3(Given : Atomic masses : Na = 23 u ; O = 16 u ; Al = 27 u)
The molecular formula of glucose is C6H12O6. Calculate its molecular mass.(Atomic masses: C = 12 u ; H = 1 u ; O = 16 u)
Calculate the molecular mass of Nitric acid, HNO3.(Atomic masses: H = 1 u; N = 14 u; O = 16 u)
How many moles are there in 34.5 g of sodium? (Atomic mass of Na = 23 u)
2. Calculate the formula unit masses of \( \mathrm{ZnO}, \mathrm{Na}_{2} \mathrm{O}, \mathrm{K}_{2} \mathrm{CO}_{x} \) given atomic masses of \( Z n=65 u \), \( N a=23 u, K=39 u, C=12 u . \) and \( O=16 u \).
(a) Define 'formula unit' of an ionic compound. What is the formula unit of (i) sodium chloride, and (ii) magnesium chloride ?(b) Calculate he formula masses of the following compounds :(i) Calcium chloride(ii) Sodium carbonate(Given : Atomic masses : Ca = 40 u ; Cl = 35.5 u ; Na = 23 u ; C = 12 u ; O = 16 u)
(a) Define mole. What are the two things that a mole represents.(b) What weight of each element is present in 1.5 moles of sodium sulphite, Na2SO3?(Atomic masses : Na = 23 u ; S = 32 u ; O = 16 u)
Calculate the molecular mass of chloroform(CHCl3).(Atomic masses: C = 12 u; H = 1 u; Cl = 35.5 u)
How many moles of calcium carbonate (CaCO3) are present in 10 g of the substance? (Ca = 40 u ; C = 12 u ; O = 16 u)
How many moles are represented by 100 g of glucose, C6H12O6 ?(C = 12 u, H = 1 u, O = 16 u)
What mass of nitrogen, N2, will contain the same number of molecules as 1.8 g of water, H2O? (Atomic masses : N = 14 u ; H = 1 u ; O = 16 u)
Which has more atoms, 100 grams of sodium or 100 grams of iron (given atomic mass of Na = 23 u, Fe = 56 u)?
Calculate the molecular mass of hydrogen bromide (HBr).(Atomic masses: H = 1 u; Br = 80 u)

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements