20cm³ of methane burns in excess oxygen.

a) what is the volume of oxygen required for this reaction?

Explain how to determine the average atomic mass from knowing the percent abundance of isotopes

The specific heat of ethanol is 2.44 J/g ֯C. How many kJ of energy are required to heat 50.0 grams of ethanol from - 20 ֯C to 68 ֯C? (heat equation)

8. How many atoms of cobalt are in a 0.39 mole sample of CoC

Sodiun reacts with water to give alkali solution and hydrogen gas. a) construct a balance chenical reaction for the reaction b) How many moles of sodiun metal react with water to make 45 dm3 of hydrogen gas and a sodiun hydroxide solution

What is the. color for base?

As the speed of a particle increases, does its associated wavelenght increase or decrease

The composition of air by volume is approximately 1/5 oxygen, 4/5 nitrogen. When air is passed through red-hot carbon, the following reaction occurs: 2C + O2 (g) 2CO (g).

How many atomic mass units are equal to 1.672*10-24 g of protons?

What is the name of the compound Sr3N2?

The water softener discussed here relies on precipitation softening also known as ion exchange. based o hte reactants used, what ions would remain in the softened water thaat would be consumed buy the homeowners