A flask with a volume of 250.0 mL contains air with a density of 1.211 g/L. What is the mass of the air contained in the flask?

Which statement is correct about the rate of most chemical reactions? It increases when the concentration of reactants decreases. It does not depend on the concentration of reactants. It increases when the temperature increases.

What does the atomic number tell you about the atom of the element

Which factors play a role in creating ocean waves? wind speed, direction, and duration wind direction and fetch wind speed and direction wind speed, direction, duration, and fetch

Calculate the ph of a solution that has a [oh-] = 2.50 x 10-4m.

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?

The temperature of a substance is a measure of the average Select one: a. attractive forces between its molecules b. mass of its molecules c. potential energy of its molecules d. kinetic energy of its molecules

Which molecular geometry is least likely to occur with sp3 hybridization? tetrahedral trigonal planar bent trigonal pyramidal

The number of moles in 118.0g of calcium chloride

You should be worried about the safety of a healthcare product if you see which of the following claims made? a. FDA approved! b. Miracle cure! c. Scientifically tested! d. Effective in double-blind study!

Which branch of science provide the proof that earth is approximately 4.6 billion years old