How do i find the mole of something?

Lizzy lost 2.3 lbs of water due to sweating during baseball practice. How much energy is absorbed from Lizzy's body for this process? 2.2 lbs = 1.0 kg. Express the answer in kilojoules.

What is the molarity of a solution that contains 1.67 moles in 1,750 mL?

Are all gas particles of same sizes?

Convert 4.50 moles of Fe to atoms of Fe

Which statement describes surface waves? They arrive before S waves. O They travel faster than P waves. They are produced by P and S waves. O They travel deep below Earth's surface.

Which of the following household appliances is designed to directly convert electrical energy to heat energy? A. a can opener B. a stove C. a garbage disposal D. a fan

The density of benzene at 15 ∘C∘C is 0.8787 g/mg/mL. Calculate the mass of 0.1700 LL of benzene at this temperature.

The mass of an object is 205 gram while the volume was measured to be 82.5 mL. What is this object's density?

What is a magnetic reversal

Suppose you are assigned two unknowns, Compound A and Compound B. One unknown is a fat, while the other is an oil. You dissolve a small amount of Compound A in cyclohexane.