Other Chemistry Answers

Balance the following combustion reaction in order to answer the following questions. Use lowest whole-number coefficients.

C2H4 + O2 ---> CO2 + H20

You are given 7.5 moles of O2 to react with 1.80 × 102 g C2H4. Upon completion of the reaction, will there be any remaining C2H4?

In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B

2A ---> 3B

How many molecules of substance B are produced when 29.2 g of substance A reacts? The molar mass of substance A is 26.6 g/mol.

Step 1: Convert the mass of A to moles.
Step 2: Convert the number of moles of A to the number of moles of B.
Step 3: Convert the number of moles of B to the molecules of B.

Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3(s). The equation for the reaction is

2KClO3 ---> 2KCl + 3O2

Calculate how many grams of O2(g) can be produced from heating 95.9 grams of KClO3(s).

For the following chemical reaction, how many moles of potassium phosphate (K3PO4) will be produced from 4 mol of potassium hydroxide (KOH)?

3KOH + H3PO4 ---> K3PO4 + 3H2O

For the following chemical reaction, what mass of calcium nitrate in grams will be needed to produce 3.17 mol of sodium nitrate?

Na2CO3 +Ca(NO3)2 ---> CaCO3 + 2NaNO3

For the following chemical reaction, what mass of calcium carbonate (in grams) will be produced from 5.03 mol of sodium carbonate?

Na2CO3 + Ca(NO3)2 ---> CaCO3 + 2NaNO3

Iodine is prepared both in the laboratory and commercially by adding Cl2(g) to an aqueous solution containing sodium iodide:

2NaI(aq) + Cl2(g) ---> I2(s) + 2NaCl(aq)

How many grams of sodium iodide, NaI, must be used to produce 40.4 g of iodine, I2?

For the following chemical reaction, how many moles of lead (II) iodide will be produced from 136 g of potassium iodide?

2Kl +Pb(NO3)2 ---> PbI2 + 2KNO3

In the following reaction, how many grams of sulfuric acid, H2SO4, will be needed to react with 87.3 g of sodium hydroxide, NaOH?

2NaOH + H2SO4 ---> Na2SO4 + 2H2O

In the following reaction, how many grams of potassium phosphate, K3PO4, will be produced from 62.3 g of potassium hydroxide, KOH?

3KOH + H3PO4 ---> K3PO4 +3H2O