Related Questions
50 mL of a solution reacts completely with 50 mL of a 2.9% NaCl solution to form 3.587 g of AgCl precipitate. What is the percentage concentration of the solution?
8.5%
17%
4.25%
12.75%
In the Haber process, if 40 moles of ammonia are formed, the number of moles of hydrogen consumed is?
20
40
60
80
If g of formic acid and g of oxalic acid react with concentrated , and the resulting gaseous mixture is passed through pellets, what mass of gas (in grams) will remain at STP?
2.8
5.6
8.4
11.2
A sample of hydrated copper sulfate (CuSO₄ ⋅ xH₂O) contains 0.25 moles of water. If the total mass of the hydrated salt is 62.5 g, and the anhydrous copper sulfate (CuSO₄) has a molar mass of 160 g/mol, what is the value of 'x' (the number of water molecules per formula unit)?
1
2
3
4
25.0 g of a calcium carbonate sample decomposes on heating to give carbon dioxide and 10.0 g calcium oxide. What will be the percentage purity of calcium carbonate in the sample? (Atomic weight: )
71.44
80
62.5
90.5
Calculate the mass (in g) of the gaseous product remaining at STP when a mixture of g formic acid and g oxalic acid is treated with conc. and then passed through pellets.
5.6
11.2
16.8
22.4
of are passed over hot coke. The maximum volume of CO formed is :
10g of which of the following substances contains the greatest number of atoms?
He
Ne
2 mol of and 11.2 L at NTP react to form mol at sulphur, then is
1.5
3
11.2
6
Two elements, R and S, combine to form and . If 10 g of contains 0.1 mole and 9 g of contains 0.05 mole, find the atomic weights of R and S.
R = 30, S = 35
R = 60, S = 20
R = 40, S = 30
R = 20, S = 40