How many moles of potassium are in 78.20 g

If 8.00 miles of NH3 of 10.00 moles of O2 react in the following reaction, how many moles of which reactant will be left over

Calculate the change in pH when 7.00 mL of 0.100 M HCl (aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3 (aq) and 0.100 M in NH4Cl (aq).

What is the number of protons in oxygen?

Meiosis happens in the major cells of multicellular organisms. true or false

The mass of a rock sample is 25 g and its density is 5 g/cm3. What is the volume of the rock sample?

In the reaction C+02 arrow C02 which element is reduced in the reaction? C O2 CO2

Which of the following correctly identifies steps used in the fractional distillation of petroleum? The mixture is cooled, condenses, then heated and boils. The mixture is cooled, boils, then heated and condense.

What is the formula of the most stable oxide of francium?

You just calculated that the heat of fusion for chloromethane is 6400 J/mol. The heat of fusion for hydrogen is 120 J/mol. Which of the following account for this difference? a. Hydrogen has stronger intermolecular forces than chloromethane. b.

Magnesium burns with a very bright light. When the flame goes out, a White powder is left behind. what is the word equation for this reaction.