If the density of an unknown gas z is 4.50 g/l at stp what is the molar mass of gas z

Which of Earth's topographical features can affect weather patterns?* A. oceans B. lakes C. mountains D. all of these

11. The Kw of water varies with temperature. Calculate the pH of water at 46⁰C with a Kw = 1.219 x 10-14. Show all calculations leading to an answer.

Compare the data on the atomic radius graph for elements 3 through 10 with the data for elements 11 through 13. a. How are they similar? b. How are they different?

For every action, there is an equal and opposite reaction. true or false

Have u been to a party where the lighting was colored? how did the color of object look different from how they normally look? how would u investigate why the color of objects appears different in colored lighting

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?