Why is a horizontal row

5) Each element is unique and different from other elements because of the number of protons in the nuclei of its atoms.

An element that speeds up chemical reactions is called a/an a. substrate. b. enzyme. c. calorie. d. solvent.

How many kilojoules of heat are absorbed when 2.00 L of water is heated from 19*C to 80*C? (Show all work including the equation you use to solve)

In water, two hydrogen atoms are bonded to one oxygen atom. why isn't water a linear molecule

Which of the following would make a solution? A. Oil in water B. Ice in water C. Sugar in water D. Sand in water

Which of the following can be classified as an empirical formula? Why? A. S2Cl2 B. C6H10O4 C. Na2SO3

A student records the value 1.5 atm on a data table. The student is measuring what?

How do you percipitate things from solution to telluric acid?

The energy needed to get a reaction started is the a. enzyme energy. b. activation energy. c. catalyst energy. d. chemical energy.

A solution is made by dissolving 8.2 g of NaOH in approximately 450 mL of water in a volumetric flask. The solution becomes quite warm, but after it is allowed to return to room temperature, water is added to total 500 mL of solution.