A 20 L vessel contains 0.1 mole of at 300 K. is prepared in the vessel by subjecting to silent electric discharge till the volume is reduced to 15 L at 300K. What is the number of moles of formed?
0.05
0.025
0.075
0.01
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The number of Na atoms in 46 g βNaβ
6.023{\mkern 1mu} {\mkern 1mu} imes {\mkern 1mu} {\mkern 1mu} {10^{23}}
2
1
12.046{\mkern 1mu} {\mkern 1mu} imes {\mkern 1mu} {\mkern 1mu} {10^{23}}
Which of the following pair of gases contain the same number of molecules?
2 mol of and 11.2 L at NTP react to form mol at sulphur, then is
1.5
3
11.2
6
The number of molecules present in 1 mL of gas or vapour at STP is:
6.02 x 10Β²Β³
2.68 x 10ΒΉβΉ
1.68 x 10Β²Β²
22.4 x 10Β²β°
0.3 g of an oxalate salt was dissolved in 100 mL solution. The solution required 90 mL of for complete oxidation. The % of oxalate ion in salt is:
Which of the following contains the maximum number of water molecules?
18 moles of water
18 molecules of water
18 grams of water
18 g of
What is the mass percent of carbon in
Arrange the following in increasing order of the number of atoms present:
(i) 2 g of He
(ii) 4 g of
(iii) 8 g of
(i) < (ii) < (iii)
(i) < (iii) < (ii)
(ii) < (i) < (iii)
(iii) < (ii) < (i)
Which of these samples contains the fewest atoms?
10 g of Au
10 g of Fe
10 g of Al
10 g of C
