How to convert 1.2*10^24 atoms of magnesium into moles?

Which type of reaction is c12 h22 o11. 12c + 11h2o

In which case is more heat involved: mixing 100.0g of 90 degree Celsius water and 80 degree Celsius water or mixing 100g samples of 60 degree celsius water and 10 degree celsius water? Assume no heat is lost to the environment.

Water change of state involves a release of energy

Angela was instructed on a test to make an analogy, or comparison, for polymers. She writes four examples of how polymers are like pearl necklaces. She has many parts to this analogy that make sense, but one part of her analogy does not fit.

A negatively charged particle is attracted to A. All particles that are located close by. B. Only particles that are large. C. Negatively charged particles. D. Positively charged particles. Reset Submit

When does hail happen?

For the reaction, calculate how many moles of the product form when 0.012 mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Al (s) + 3O2 (g) →2Al2O3 (s) Express your answer using two significant figures.

Nuclei with too many or too few neutrons are?

Be sure to answer all parts. Enter the formula for potassium dihydrogen phosphate and determine its molecular (formula) mass.

g Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water. Suppose 2.71 g of ethane is mixed with 3.8 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction.