Answer the following questions in the textbox. Number each question with the answer. 1. Which compound is composed of the most atoms?

A. H2SO4 B. Li2N C. Mg(OH)2 D. NaF

2. Which compound has the most hydrogen atoms?

A. NaOH B. C2H4O C. H3PO4 D. (NH3)2SO4

3. Which compound has the greatest molar mass?

A. H2O B. C6H12O6 C. HNO3 D. C2H6

4. What is the molar mass for Ca(C2H3O2)2?

A. 71g B. 99g C. 158g D. 148g

5. Show work for #4.

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

Why is retrograde motion an apparent motion