What is the number of formula units in a 5.88 mol sample of Ca2O?

When group 2A element from ion they A. lose two proton B. gain two proton C. lose two electron D. gain two electron

A persn uses 750 kcal on a long hike. Calculate the energy used in both units: a. joules b. kilojoules

Calculate the number of moles of Cl atoms in 1.81*10^24 formula units of magnesium chloride, MgCl2.

What is fusion energy

The mole fraction of iodine, i2, dissolved in dichloromethane, ch2cl2, is 0.115. what is the molal concentration, m, of iodine in this solution?

Which is the best description of a scientific theory? a. a statement about how two different variables are related b. a collection of laws that are explained the same way c. an explanation of many observations and tested hypotheses d.

The hypothetical explosion that created the universe is called the big bash. true or false

Given the balanced equation: CaCO3 (s) + 2HCl (aq) - - >CaCl2 (aq) + H2O (l) + CO2 (g) What is the total number of moles of CO2 formed when 20. moles of HCl is completely consumed? (1) 5.0 mol (3) 20. mol (2) 10. mol (4) 40. mol

When the particles of a gas decrease in energy what happens? Question 9 options: It freezes It gets hotter It changes to a liquid It changes to a plasma

2. A solution is 0.01 M in Ba2 + and 0.01 M in Ca2+. Sodium sulfate is added to selectively precipitate one of the cations, while leaving the other in solution. a) Given that BaSO4 and CaSO4 have Ksp values of 1.07 x 10-10 and 7.