Convert 0.400 moles of BF3 to molecules

Which elements are likely to gain electrons

When 280. mL of 1.50 * 10⁻⁴ M hydrochloric acid is added to 135 mL of 1.75 * 10⁻⁴ M Mg (OH) ₂, the resulting solution will be? a) acidic b) basic c) neutral d) it is impossible to tell from the information given.

A metal weighing 7.101 g is placed in a graduated cylinder containing 33.0 mL of water. The water level rose to the 37.4 mL mark. a) Calculate the density of the metal (in g/mL).

Can a nonpolar molecule contain polar covalent bonds?

If 4.55 mol of calcium carbide (CaC2) reacts with an excess of water, how many moles of acetylene (C2H2), a gas used in welding, will be produced?

Cracks in rocks chemical or mechanical

A large boulder falls from an underwater ledge and crashes on the floor of the ocean. A pod of dolphins is 800 meters away. Determine how long it takes for the sound of the crash to reach the dolphins. A) 0.5 sec B) 0.3 sec C) 2.3 sec D) 1.9 sec

Given 4.80g of ammonium carbonate, find: Number of moles of the compound Number of moles of ammonium ions Number of moles of carbonate ions Number of moles of hydrogen atoms Number of hydrogen atoms

The density of water is 1.0 g/cm3 will rubbing alcohol float with a density of 0.81 g/cm3

Write an equation that shows the formation of the phosphide ion from a neutral phosphorus atom.