Calculate the number of atoms in 23 g of sodium (Na).

Group 17 elements are the most reactive of the nonmetal elements because they -

A food worker had safely cooled a large pot of soup to 70 F (21 C) with two hours. What temperature must the soup Reach in the four hours to be cooled properly

The smallest unit of an element is a blank

The volume of a gas is 59.5 liters at 121 kPa. what will be the volume if the pressure is reduced to 108 kPa, assuming temperature remains the same?

Match the acid base pairs by arranging the acid name with the conjugate base formula. Hydrogen carbonate Hydrogen phosphate Carbonic acid Read Water Sulfuric acid Phosphoric acid A. CO32- B. HSO4- C. HCO3- D. PO43- E. H2PO4- F. OH-

Which of the following accurately describes carbon atoms? A. When carbon atoms bond to other carbon atoms, they can only form triple bonds. B. Carbon atoms can bond to other carbon atoms. C.

On a separate sheet of paper, write the formulas for each of the following, complete and balance 1. iron + copper (II) sulfate 2. potassium chloride + mercury (I) sulfate 3. sulfur + oxygen

Match the substance with its chemical formula. 1. H + hydroxide ion 2. H3O + hydronium ion 3. OH - hydrogen ion

Which of those molecules are polar. Co2, So2, CH2Cl2, PCl3

A chemical spill gets into the soil and effects the plants within a forested ecosystem. explain why the top predators would be most affected by this