In which chemical reaction will the heat content of the reactants be more than that of the products? A: endothermic B: Reversible C: Irreversible D: Exothermic

If salt is dissolved in water, water serves as the: a. solute. b. solvent. c. dissolved medium. d. none of the above

If temperature is increased the number of collisions per second

How many Br - ions are there in 2.51 grams of AlBr3

26 g of zinc combines with 12.8 g of sulfur. What is the empirical formula of zinc sulfide? A. Zn2S2 B. ZnS2 C. ZnS D. Zn2S

What volume of water, in mL, is needed to dissolve 1.3*103 mg of carbon dioxide gas when the partial pressure of carbon dioxide above the water is 3.7 atm at 25 °C? The Henry's constant for carbon dioxide gas in water at 25 °C is 0.034 M/atm.

Sunlight produces a spectrum of colors that includes what?

Which of the following is not a common use of gypsum? a. wallboard/drywall for homes b. a primary ingredient for toothpaste c. surgical splints and casts d. pH reducing agent for acidic soils

In which of the following are the symbol and name for the ion given correctly A. NH4+: ammonia; H+: hydride B. C2H3O2-: acetate; C2O4-: oxalite C. OH-: hydroxide; O2-: oxide D. PO3 3-: phosphate; PO4 3-: phosphite

If you add a large piece of zinc to a beaker of acid and, in a separate beaker, zinc shavings to a beaker of acid (of equal concentration/volume), the sample with the zinc shavings will react faster than the sample with the large piece.

How many atoms of oxygen are in 0.100 miles of silicon dioxide, SiO^2