CH₄ + 2O₂ → CO₂ + 2H₂O 1. If 20 moles of methane are available, how many moles of methane (CH₄) will burn?
G
F
S


2. How many moles of carbon dioxide (CO₂) are produced when 40 moles of methane (CH₄) are burned?
G
F
S


3. If 25 moles of oxygen (O₂) are available, how many moles of methane (CH₄) will burn?
G
F
S


4. During combustion, 24 moles of carbon dioxide were obtained. How many moles of water were also obtained?
G
F
S



CH₄ + 2O₂ → CO₂ + 2H₂O
5. How many moles of water will be produced from the combustion of 64 grams of methane (CH₄)?
G
F
S

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.