Write a complete ionic equation for each of the following reactions. a. BaCl2(aq) + Na2SO4(aq) BaSO4(s) + 2NaCl(aq)

b. Zn(s) + 2HCl(aq) ZnCl2(aq) + H2(g)

Why should the scientific method be used to answer a question? a. it provides a way to test an idea without any bias. b. it provides a way to test a hypothesis. c. it provides a way to ensure all hypotheses are proven correct. d. it provides a way to quickly turn a hypothesis into a scientific theory.

Stage in which a typical star has completely stopped fusion

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness