7. Calculate Rock A contains 10% quartz and 45% calcite.
The rest of the rock is mica.
What percentage of the rock
is mica?

45% of the rock is mica

Step-by-step

10% + 45% = 55%. 100% - 55% = 45%

chemists are often responsible for designing a chemical reaction and analyzing the products obtained from it. one significant part of designing a chemical reaction is determining the amount of each reactant that is needed and the amount of each product that will be produced. in order to do so, chemists use stoichiometry, the quantitative relationships between reactants and products.