The density of osmium, which is the densest metal, is 22.57 g/cm³. What is the mass of a block of osmium that measures 1.00 cm x 4.00 cm x 2.50 cm? Show your work. Be aware of significant figures!

Why does some kind of matter like potassium permanganate dissolve into other kind of matter whereas other kind of matter like wood doesn't dissolve?

What volume change occurs to a 400.0 mL gas sample as the temperature increases from 22.0 °C to 30.0°C?

Suppose 4 moles of a react with excess amount of b to produce 382.5 g of c, calculate the percent yield of c. (the molar mass of c is 310.2 g/mol)

In which scenario is a chemical change occurring? A. A cup of ice cream is melting. B. A block of dry ice is sublimating. C. A section of iron fence is corroding. D. A flask of chlorine gas is condensing.

30) Experts estimate that over 25,000 species become extinct each year, with some estimating this number to be over 100,000. This is an alarming rate that threatens fragile ecosystems and global biodiversity.

When 200. ml of water are added to 100. ml of 12% kcl solution the final concentration of kcl is (assume the volumes add.) ?

What's needed to build a neutral atom?

When forces attracting solvent particles to each other are broken what is provided for a solution. 1. Energy for the solute to precipitate 2. Space for the solute in the solvent 3. Inertia for the solute to move into the solvent 4.

Describe how to determine the rate law for an overall reaction that involves multiple steps

What happens when human blood contains too many bases? A. Hydrogen ions from bicarbonate ions react with the bases. B. Water molecules break down to produce protons to react with the bases. C.