WorksheetsMole concept
Total questions: 10
Worksheet time: 6mins
Calculate the number of Cl–
and Ca2+ ions in 222 g anhydrous CaCl2
2N, 4N
4N, 2N
6N, 2N
1N,2N
What is the mass of 6.02 x 1023 platinum atoms?
30.97 g
106.42 g
140.91 g
195.09 g
What is Avogadro’s number?
12.046×10*23
6.023 × 10*23
3.0115 × 10*23
1.505 × 10*23
19.7 kg of gold was recovered from a smuggler. How many atoms of gold were recovered
(At. wt of gold = 197)?
100
6.02 × 10*23
6.02 × 10*24
6.02 × 10*25
100 g of which gas contains of the maximum number of gram molecules?
H2
He
SO2
O2
What is the mass of 0.2 mole of orthophosphoric acid (H3PO4) ?
1.96 g
196 g
19.6 g
0.196 g
What is the volume of 3.4 g NH3 gas at STP?
44.8 lit
4.48 lit
22.4 lit
2.24 lit
In a bank there are as many coins as number of molecules in 1.6 microgram of CH4. How many coins are there in the bank(🏧)
9.6 x10*23 coins
6.023x10*16 coins
1.6x10*-6 coins
1.6x10*17 coins
Calculate the number of moles in one metric ton of iron(metric ton=10*3kg)
1.786x10*4 mols
6.023x10*20 mols
6.023x10*16 mols
0.001x10*3 mols
Calculate the number of molecules in one drop ( 💧) of water (🌊💦) having mass 0.06 g .
1.673x10*21 molecules
1.984x10*21 molecules
108x10*21 molecules
1.08x10*23 molecules
