CHEMICAL FORMULAE, EQUATIONS AND CALCULATIONS: EXAMPLE 2
2
Balance the equation for the combustion of ethane:
C2H6 + O2 + CO2 + H2O
Starting from the left, balance the carbons:
C2H6 + O2 → 2CO2 + H2O
Now the hydrogens:
CHA + 0, 200, + 3H2O

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.

Write and balance the chemical equation that represents the reaction of aqueous sulfuric acid with aqueous sodium hydroxide to form water and sodium sulfate. include phases.