5. carry out the following operations and express the answer with the correct number of significant
figures. (10 + 67.809) × 20 =
a: 1560
b. 1500
c.2000
d.1600

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j

How many moles of bromine are needed to produce 3.23 moles of potassium bromide