The moon makes light the same way that the sun does. True or False

One gram of alum, KAl (SO4) 2.12H2O, contains 1.3 * 1021 Al atoms. How many oxygen atoms are contained in 1.0 g alum?

Arrange the isotopes of sulfur and phosphorus in order from most neutrons to fewest. P-35 S-36 P-33 S-34 P-32 P-31

Silver metal that is exposed to the air tarnishes and becomes doing black overtime this is most likely the result of

Calculate the concentration of an aqueous solution of naoh that has a ph of 11.50

0.004207 round off to 3 significant figures

Organize the items listed into the proper sequence of events for gas exchange. a: O2 is transported to cells by circulatory system. b: O2 is drawn into the lungs during inhalation. c: Cells use O2 and generate CO2. d: CO2 is exhaled.

Research about the reaction of baking soda and vinegar

What mass (in mg) does 2.63 moles of nickel have? 3.56 * 105 mg 1.54 * 105 mg 2.23 * 104 mg 129 mg?

Given the propane molecule C3H8 (g) ! a) What is the balanced equation for the combustion of propane in O2? (20 pts.) b) What is the standard enthalpy change ΔH0 for the reaction at 25°C? (20 pts.

Which of the following happens during a chemical change? Check all of the boxes that apply. One atom or more changes into atoms of another element. New substances with different properties are formed. Solids, liquids, or gases may form.