A compound contains 28% nitrogen and 72% of a metal by weight. Three atoms of metal combine with two atoms of nitrogen. If the atomic weight of nitrogen is 14, the atomic weight of the metal is:
12
24
36
48
Related Questions
The production of 10 moles of ammonia by the Haber process requires how many moles of hydrogen gas, assuming complete reaction?
5
10
15
20
Elements X and Y form compounds and . If 20 g of contains 0.2 moles and 18 g of contains 0.1 moles. What are the atomic weights of elements X and Y?
X = 20, Y = 40
X = 30, Y = 35
X = 40, Y = 30
X = 50, Y = 25
The number of Na atoms in 46 g ‘Na”
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}}
What is the mass percent of carbon in
The apparatus in which standard solution is prepared is known as :
Measuring flask
Round bottom flask
Burette
None of these
What is the mass of 0.2 moles of oxygen atoms?
1.6 g
3.2 g
6.4 g
16 g
A sample of magnesium carbonate weighing 30.0 g is heated until it completely decomposes to magnesium oxide and carbon dioxide. If 12.0 g of magnesium oxide is produced, what is the percentage purity of the original magnesium carbonate sample? (Atomic weight: )
60
75
84
90
The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber’s process is:
10
20
30
40
The isoelectronic species among the following are:
0.5 moles of water contains how many molecules?
6.022 x 10²³ molecules
1.204 x 10²⁴ molecules
3.011 x 10²³ molecules
1.505 x 10²³ molecules
