Chemical Changes and Equations

For the following reaction, identify the products formed and balance the equation:

${\mathrm{Fe}}_2({\mathrm{SO}}_4{)}_3 + \mathrm{NaOH} \to$

For the following reaction, identify the products formed and balance the equation:

${\mathrm{HNO}}_3 + {\mathrm{CaCO}}_3 \to$

For the following reaction, identify the products formed and balance the equation:

${\mathrm{MnO}}_2 + \mathrm{HCl} \to$

For the following reaction, identify the products formed and balance the equation:

$\mathrm{S} + {\mathrm{HNO}}_3 \to$

For the following reaction, identify the products formed and balance the equation:

${\mathrm{Na}}_2{\mathrm{O}}_2 + {\mathrm{H}}_2\mathrm{O} \to$

Balance the following chemical equation: 

${\mathrm{SO}}_2 + {\mathrm{H}}_2\mathrm{S} \to {\mathrm{H}}_2\mathrm{O} + \mathrm{S}$

Balance the chemical equation:

Balance the chemical equation:

Balance the chemical equation:

${\mathrm{LiNO}}_3 \to {\mathrm{Li}}_2\mathrm{O} + {\mathrm{NO}}_2 + {\mathrm{O}}_2$

Balance the chemical equation:

${\mathrm{NaNO}}_3 \to {\mathrm{NaNO}}_2 + {\mathrm{O}}_2$

Balance the chemical equation:

$\mathrm{BeO} + \mathrm{NaOH} \to {\mathrm{Na}}_2{\mathrm{BeO}}_2 + {\mathrm{H}}_2\mathrm{O}$

Explain the types of reaction?

Balance the equation:

$\mathrm{Pb}(\mathrm{NO}{{)}_3}_{ \left(\mathrm{s}\right)} \to {\mathrm{PbO}}_{ \left(\mathrm{s}\right) }+ {\mathrm{NO}}_2{ }_{\left(\mathrm{g}\right)} +{{\mathrm{O}}_2}_{\left(\mathrm{g}\right)}$

Balance the given chemical reaction:
$\mathrm{Al}+{\mathrm{CuCl}}_2\to {\mathrm{AlCl}}_3+ \mathrm{Cu}$

Find the number of phosphine molecules formed when $5$ molecules of ${\mathrm{Ca}}_3{\mathrm{P}}_2$ reacts with water. Slaked lime is another product.

During balancing equation can there be different number for balancing both sides?

A piece of magnesium ribbon is added to a flask containing dilute hydrochloric acid.
Hydrogen gas is formed which is collected in the measuring cylinder.
The line on the graph indicates the rate of chemical reaction occurring in the flask.
The amount of hydrogen formed with time is plotted on a graph.

.

Which of these could increase the rate of reaction in the flask?

Circle ‘Yes’ or ‘No’ for each row. 

Which of the following is incorrect observation of the above reaction?

What are chemical reactions?

Does hydrogen gas reduce magnesium oxide?