Baljinder Kaur Solutions for Chapter: Mole Concept and Stoichiometry, Exercise 1: Test Yourself

$2{\mathrm{C}}_4{\mathrm{H}}_{10}+13{\mathrm{O}}_2 \stackrel{}{\to } 8{\mathrm{CO}}_2+10{\mathrm{H}}_2\mathrm{O}$. Calculate:

How many moles of oxygen would be needed for the complete combustion of $5.8 \mathrm{g}$ of butane?

$2{\mathrm{C}}_4{\mathrm{H}}_{10} +13{\mathrm{O}}_2 \stackrel{}{\to } 8{\mathrm{CO}}_2+10{\mathrm{H}}_2\mathrm{O}.$Calculate:

What volume of ${\mathrm{CO}}_2$ at S.T.P is formed by complete combustion of $5.8 \mathrm{g}$ of butane?

Washing soda $({\mathrm{Na}}_2{\mathrm{CO}}_3.10{\mathrm{H}}_2\mathrm{O})$ of mass $57.2 \mathrm{g}$is heated. Calculate the mass of anhydrous sodium carbonate left.

When an excess of lead nitrate was added to a solution of sodium sulphate, 15.15 g of lead sulphate was precipitated. What mass of sodium sulphate was present in the original solution.

${\mathrm{Na}}_2{\mathrm{SO}}_4+\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_3 \stackrel{}{\to } {\mathrm{PbSO}}_4+2{\mathrm{NaNO}}_3$

$(\mathrm{Pb}=207\mathrm{u}, \mathrm{Na}=23 \mathrm{u}, \mathrm{S}=32 \mathrm{u},\mathrm{O}=16 \mathrm{u}, \mathrm{N}=14\mathrm{u})$

Urea is sold in $50 \mathrm{kg}$ sacs, what mass of nitrogen is present in $1$ sac of urea$\left[\mathrm{CO}{\left({\mathrm{NH}}_2\right)}_2\right]$? 

What is the mass of $22.5 {\mathrm{cm}}^3$ of $\mathrm{CO}$?

$2\mathrm{Ca}{\left({\mathrm{NO}}_3\right)}_2 \stackrel{}{\to } 2\mathrm{CaO}+4{\mathrm{NO}}_2+{\mathrm{O}}_2$

Calculate volume of ${\mathrm{NO}}_2$ obtained at S.T.P.

$2\mathrm{Ca}{\left({\mathrm{NO}}_3\right)}_2 \stackrel{}{\to } 2\mathrm{CaO}+4{\mathrm{NO}}_2+{\mathrm{O}}_2$

Calculate mass of $\mathrm{CaO}$ obtained when $16.4 \mathrm{g}$ of $\mathrm{Ca}{\left({\mathrm{NO}}_3\right)}_2$ is heated to constant mass.