Which of the following is an exmple of a chemical change? A: burning a candle B:adding food coloring to water C: stirring butter and surgar together D: breaking a rock in peices

A common way to make hydrogen gas in the laboratory is to place a metal such as zinc in hydrochloric acid (see the figure). the hydrochloric acid reacts with the metal to produce hydrogen gas, which is then collected over water.

What units are generally used for solubility?

A neutron is a positively charged subatomic particle. a. True b. False

Each orbit surrounding an atom is allowed how many electrons?

Which combinations of substances resulted in a chemical change?

Is a sodium cation smaller or larger than a sodium atom

What would the charge be on an atom with 9 protons 9 electrons and 10 neutrons

PH + pOH = 14. What is the hydroxide concentration of a solution with pH of 8?

A student Increases the temperature of a 417 cubic centimeter balloon from 278 K to 231 K. Assuming constant pressure what should the new volume of the balloon be

What is the molarity of a solution with 1.17 moles of Ca (OH) 2 disolved in 0.2 liters of water? A. 1.17 M B. 0.2 M C. 0.17 M D. 5.85 M