Which element is a metal that is in the liquid phase at STP?

(1) bromine (3) hydrogen

(2) cobalt (4) mercury

A block of metal with a mass of 42.8 g and has side lengths of 4.2 cm, 5.6 cm, and 9.8 cm

When the following reaction is completed and written in the form of a net ionic equation, which of the following elements will NOT be present in the equation? Pb (NO3) 2 (aq) + K2SO4 (aq) a. Pb b. S c. O d. N

Which of the following reactions shows that the rate of the appearance of D is twice the disappearance of A and one third the disappearance of B?

What mass of copper is deposited when a current of 10.0a is passed through a solution of copper (ii) nitrate for 30.6 seconds?

The unburned, unfiltered fuel parts that remain to be removed through the exhaust are called a. sulfuric acid emissions. b. petroleum bases. c. hydrocarbons. d. carbon dioxide emissions.

What astronomical equiptment did hypatia use?

Name each activity or observation as either physical or chemical change. 1) Boiling water for pasta 2) Digesting food 3) Soda goes "flat" 4) Stretching a rubber band 5) Grilling a hamburger 6) Adding sugar to tea 7) Adding lemon to tea 8) Mowing the

Ironing a shirt is an example of ... convection conduction radiation condensation

Which compound conducts electricity only in the molten state? A. sodium bromide B. calcium hydroxide C. barium sulfate D. magnesium sulfate

What is going to happen to a balloon filled with helium that is left in a car over night when the temperature drops approximately 20 degrees