Gold is a pure substance or a mixture.

Are metal ions larger or smaller than the neutral atoms they came from

To establish the Intermediate Nuclear Forces Treaty, Reagan negotiated with A. Yeltsin. B. Khomeini. C. Brzezinski. D. Gorbachev.

Your answer should have the same number of significant figures as the starting measurement. 3201 mL = cm³

Introduction: Chemical formulas represent ratios. To make H2O, you need two atoms of H for each atom of O; you would also need two moles of H for every mole of O.

Methanol has a density of 0.79g/ml. Calculate the mass of 589ml of methanol.

Student follow up The ionic equation for the reaction between zinc and sulfuric acid is. Zn (s) + 2H (aq) - - Zn" (aq) + H2 (g) a State what has been oxidised in this reaction. Explain your answer in terms of electrons.

What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large atoms d. Atoms at the top of the periodic table

What does it mean when there are 2.3 x 10-4 moles?

Electric force is an A. attraction and repulsion between protons and electrons . B. attraction and repulsion between protons and neutrons. C. attraction and repulsion between neutrons and electrons.

A salt crystal has a mass of 0.18 mg. how many nacl formula units does it contain?