At what temperature will 0.654 moles of helium gas occupy 12.30 liters at 1.95 atmospheres

What is the mass of a 5.00cm^3 piece of copper that has a density 8.96g/cm?

A 250g sample of water with an initial temperature of 98.8oC loses 1794 cal of heat. What is the final temperature of the water?

Convert 0.109 mol of lithium to grams

Seven vans each hold 6 passengers. Each passenger is carrying 20 candies divided equally among 5 small boxes. How many candies are on the vans? 840 candies 4200 candies 168 candies 120 candies

Select all the true statements regarding chemical equilibrium.

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number

Give 3-5 pieces of evidence to support why cloning is bad.

Nitrogen combines with oxygen to form nitrogen monoxide (no) and nitrogen dioxide (no2). a sample of no consists of 1.14 g of oxygen and 1 g of nitrogen.

The modern periodic table reflects many improvements to Mendeleev's original table. If Mendeleev's table was incorrect, why is it still studied in chemistry classrooms today?

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