Which is the separation technique that identifies parts of a mixture based on how fast different compounds

move across a material?

a. filtration

c. chromatography

b. distillation

d. crystallization

A pharmacist has a prescription for 30 ml of an eye drop that is to contain benzalkonium chloride 1:750 as a preservative. on the shelf the pharmacist finds 17% benzalkonium chloride.

A 75.0 l steel tank at 20.0°c contains acetylene gas, c2h2, at a pressure of 1.39 atm. assuming ideal behavior, how many grams of acetylene are in the tank?

11. How is the solute in a solution generally differentiated from the solvent?

Which type of bond forms between water molecules? a. strong bond b. hydrogen bond c. covalent bond d. polar bond

Which sabatamic particle is electrically neutral and found in the nucleus of an atom

What is the name of a binary compound made up of lithium and chlorine?

A scientist in London and a scientist in California both conducted independent investigations that produced similar results.

When magnesium combines with oxygen, the reaction involves a. a conversion of protons into electrons. b. sharing of electrons between Mg and O. c. transfer of electrons from Mg to O. d. transfer of electrons from O to Mg.

The activation energy for the reaction no2 (g) + co (g) ⟶no (g) + co2 (g) is ea = 100 kj/mol and the change in enthalpy for the reaction is δh = - 375 kj/mol.

What process transform solar energy into chemical energy?