Which of the following statements about minerals is false?

a. the densities of many minerals are quite similar.

b. minerals reflect light in different ways.

c. the color of a mineral's powder doesn't change.

d. a mineral can break in only one way.

A 0.250 M solution of HCN has a pH = 4.87. a) Determine the [H3O+] in the solution. b) Calculate the percent ionization of HCN in this solution.

Can be lined with moist filter paper to catch insoluble solids a. calorimeter b. Geiger counter c. Burette d. Funnel e. Bunsen burner

Which of these can be classified as a pure substance?

How do atoms become ions?

A steel tank with a volume of 2.15 L contains N2 gas under a pressure of 8.91 atm at 5.81°C. Calculate the number of moles of N2 in the tank.

Zn (s) + 2HCl (aq) → ZnCl2 (aq) + H2 (g) When combining zinc metal with hydrochloric acid, you notice that you run out of zinc and still have plenty of hydrochloric acid to continue the reaction. What is the term used to describe the zinc?

Engineers increase output in crop production by combining the strengths of two plants. This can be done by using one plant to pollinate a different plant so that their strengths are combined into a new plant. What is this technique called?

Using the first volume and temperature reading on the table as V1 and T1, solve for the unknown values in the table below. Remember to use the rules of significant figures when entering your numeric response. A: B: C: D: A 2-column table with 5 rows.

Which scientist performed the cathode ray experiment leading to the discovery of electrons

Why does the temperature remain constant during melting till all the ice has melted?