Mass, Volume and Mole Relationship

Q.

Calculate the molecular weight of the following

Aluminium hydroxide ($\mathrm{Al}{\left(\mathrm{OH}\right)}_3$)

Q.

Calculate the molecular weight of the following

Hydrated copper sulphate ${\mathrm{CuSO}}_4.5{\mathrm{H}}_2\mathrm{O}$.

Q.

The mass of 112 litres of methane gas $\left({\text{CH}}_4\right)$ at STP is:

1. 160 g
2. 80 g
3. 40 g
4. 60 g

Q. Calculate the volume of 340 g of ${\text{NH}}_3$ at STP.

Q. How many moles of nitrogen (${\text{N}}_2$) are required to produce 10 moles of ammonia (${\text{NH}}_3$) by reaction with hydrogen (${\text{H}}_2$)?

1. 5

Q.

Calculate the molecular weight of the following:

Ammonium nitrate $\left({\mathrm{NH}}_4{\mathrm{NO}}_3\right)$

Q. Claculate the mass of 5000 ml of $N{H}_3$ gas at STP.

Q.

The volume of 170 g of ${\text{NH}}_3$ at STP is _______.

1. 2.24 L
2. 224 L
3. 7.58 L
4. 0.45 L

Q.

How many grams of magnesium nitrate should be heated to produce oxygen which is just sufficient to form 15.3g of alumina?

Q. How many moles of nitrogen (${\text{N}}_2$) are required to produce 10 moles of ammonia (${\text{NH}}_3$) by reaction with hydrogen (${\text{H}}_2$)?

1. 5

Q.

The mass of 5000 ml of $N{H}_3$ gas at STP is

1. 0.3 g

2. 0.037 g

3. 0.37 g

4. 3.74 g

Q. How many moles of iron ($\text{Fe}$) are obtained from iron oxide ( ${\text{Fe}}_2{\text{O}}_3$) by using 15 moles of carbon monoxide ($\text{CO}$)? Use the equation given below.

${\text{Fe}}_2{O}_3\left(s\right)+3\mathrm{CO}\left(g\right)\to 2\mathrm{Fe}\left(s\right)+3{\mathrm{CO}}_2\left(g\right)$

1. 10

Q. What amount of Zn will be required to produce $H_2$ by its action on dilute $H_2{\mathrm{SO}}_4$ which will completely react with the oxygen, produced by heating 30g of ${\mathrm{KClO}}_3$?

Q. Calculate volume of oxygen at STP required to complete the combustion of 8 L of methane.

1. 16

Q. How many grams of ${\text{MnO}}_2$ are needed to get 36.2g of ${\text{MnCl}}_2$ from the equation given below?
${\mathrm{MnO}}_2\left(s\right)+4\mathrm{HCl}\left(\mathrm{aq}\right)\to {\mathrm{MnCl}}_2\left(\mathrm{aq}\right)+2H_{2}O\left(l\right)+{\mathrm{Cl}}_2\left(g\right)87g36.5g126g18g71g$

1. 25

Q. Identify the pair that contains the same number of atoms.

1. 8 g of Helium and 4 g of Hydrogen
2. 2 g of Hydrogen and 16 g of Oxygen
3. 14 g of Nitrogen and 16 g of Oxygen
4. 16 g of Oxygen and 8 g of Helium

Q. Four cylinders are filled with 11.2 L of ${\text{H}}_2$, 5 L of ${\text{O}}_2$, 22.4 L of ${\text{N}}_2$ and 8 L of ${\text{Cl}}_2$ gases. Which cylinder contains the maximum number of molecules at STP?

1. The cylinder containing hydrogen.
2. The cylinder containing oxygen.
3. The cylinder containing nitrogen.
4. The cylinder containing nitrogen chlorine.

Q. How many grams of ${\text{MnO}}_2$ are needed to get 36.2g of ${\text{MnCl}}_2$ from the equation given below?
${\mathrm{MnO}}_2\left(s\right)+4\mathrm{HCl}\left(\mathrm{aq}\right)\to {\mathrm{MnCl}}_2\left(\mathrm{aq}\right)+2H_{2}O\left(l\right)+{\mathrm{Cl}}_2\left(g\right)87g36.5g126g18g71g$

1. 25

Q. Which series of reactions correctly represents chemical reactions related to iron and its compound?

1. $Fe\stackrel{C{l}_2,heat}{\to }FeC{l}_3\stackrel{heat,air}{\to }FeC{l}_2\stackrel{Zn}{\to }Fe$
2. $Fe\stackrel{O_2,heat}{\to }F{e}_3{O}_4\stackrel{CO,{600}^{\circ }C}{\to }FeO\stackrel{CO,{700}^{\circ }C}{\to }Fe$
3. $Fe\stackrel{O_2,heat}{\to }FeO\stackrel{dil{H}_{2}S{O}_4}{\to }FeS{O}_4\stackrel{heat}{\to }Fe$
4. $Fe\stackrel{dil{H}_{2}S{O}_4}{\to }FeS{O}_4\stackrel{H_{2}S{O}_4,O_2}{\to }F{e}_2(S{O}_4{)}_3\stackrel{heat}{\to }Fe$

Q.

The mass of 5000 ml of $N{H}_3$ gas at STP is