How many grams are in 4.20 mol of sodium chloride (nacl) ? express your answer numerically in grams?

Which of the following is a synthesis reaction Cl2+2NaBr yields Br2+2NaCl 2Na+2H2O yields 2NaOH+H2 4H+O2 yields 2H2O C7H16+11O2 yields 7CO2+8H2O

All compounds are molecules but not all molecules are compounds. Explain this statement.

The hydrostatic pressure that makes a diluted solution diffuse solvent molecules across a semipermeable membrane into a concentrated solution is known as A. osmotic pressure. B. ambient pressure. C. absorption pressure. D. adsorption pressure.

How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu = 1.6605 10-24 g) ?

Given that the pH of a substance is 2.5, what is the pOH? A. 0 B. 3.5 C. 7.5 D. 11.5

What is the net ionic equation for the following reaction? H2CrO4 + Ba (OH) 2

How does improving food-storage facilities make farming more sustainable? A. It decreases the amount of water needed. B. It keeps food from rotting as quickly and being wasted. C. It decreases the amount of land needed. D.

Which of the following shows the correct net ionic equation for the reaction between HCl and NH3?

How would non secretion of of saliva effect digestion of food in the mouth.

Which of the following is insoluble in water? a." (NH) SO b. Na so c. Maso d. ZnSO e Baso