Half life worksheet answer key 1. How long does it take a 100.00g sample of As-81 to decay to 6.25g?

How much work must be done on a 1,000-kg car to increase its speed from 1 m/s to 2 m/s? A. 1,000 J B. 2,000 J C. 1,500 J D. 1 J

Solve the following: 2.05 x 102 - 1.02 x 101

How many moles of ammonia are produced when 8 moles of nitrogen gas react with hydrogen gas?

If the heat of combustion for a specific compound is - 1320.0 kJ/mol and its molar mass is 71.83 g/mol, how many grams of this compound must you burn to release 543.00 kJ of heat?

What are energy sublevels? (A) multiple energy levels of any magnitude within an energy level (B) multiple orbitals of specific magnitude within an energy level (C) only those energy levels that overlap others (D) electrons whose energy has dropped

Iodine pentafluoride gas reacts with iodine fluoride gas producing iodine heptafluoride gas and iodine gas. What is the maximum number of grams of iodine gas that can be produced from a reaction of 10.0 g of iodine pentafluoride with 11.

What evidence of a chemical reaction might you see in dropping an Alka-Seltzer tablet into a glass of water?

State hess's law. how is it used

When the name of a molecule ends in - ose, the molecule is a

How many moles are in. 12 grams of gold.