Stoichiometry

Front

The coefficients in a chemical equation represent the # of ___________ of that substance. Options: grams, molecules, moles, atoms.

Back

moles

Front

Molar mass, Avogadro's number, density, and coefficient ratios are all examples of

Back

conversion factors

Front

Avogadro's number is equivalent to the # of ______________ per mole of a substance.

Back

atoms/molecules

Front

If a chemical reaction has a net decrease in potential energy, in other words, a negative change in enthalpy, it is said to be:

Back

exothermic

Front

Balance the chemical equation for the reaction of Lead IV Nitrate and sulfuric acid. Solve for the # of moles of sulfuric acid needed to convert 25 grams of Pb(OH)4 into Pb(SO4)2.

Back

0.165

Front

Propane burns in the reaction shown. How many molecules of oxygen would it take to burn 100 grams of propane?

Back

6.84 x 10^24

Front

Calculate the answer to the problem shown.

Back

0.176g

Front

How much energy is given off when 8.22 grams of oxygen react?

Back

-101.08 KJ

Front

How many grams of barium sulfate (BaSO4) can be prepared from 10 Liters of a 5M solution of barium nitrate (Ba(NO3)2)?

Back

1.17 x 10^3 g

Front

Consider a chemical reaction A+B-->C. If reactant A runs out before reactant B, the reaction

• continues, but more slowly
• stops
• reverses direction

Back

stops