Which of the following chemical reactions is an oxidation-reduction reaction? CuSO4 + BaCl2 yields BaSO4 + CuCl2 Pb (NO3) 2 + 2NaCl yields PbCl2 + 2NaNO3 N2 + 3H2 yields 2NH3 K2SO4 + BaCl2 yields BaSO4 + 2KCl

Aluminum bromide and potassium sulfate react to form potassium bromide and aluminum sulfate. a. Write and balance the reaction b. If you have 250.0 g of aluminum bromide and 200.0 g of potassium sulfate, which reagent is limiting? c.

Which sample of matter is a mixture? (1) Br2 (ℓ) (3) KBr (s) (2) K (s) (4) KBr (aq)

How to balance this equastion: _H2 + _O2 = _H20

What is density of an apple

Does salt (NaCl) dissolve in ethanol, acetone or hexane? Why or why not?

Facts about heat absorption and simple questions about heat absorption with answer

You measure a piece of wood with a meter stick and is it exactly one meter long. How many centimeters long is it?

When salt dissolved in water, what type of change occurs? A) physical only B) chemical only C) physical and chemical

Select all of the characteristics that define matter. A.) Matter has mass. B.) Matter has volume (takes up space). C.) Atoms and compounds are made out of matter. D.) All matter has the same density.

The science of observing and forecasting weather conditions is called