- Is the universe expanding?

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How many grams in 100 grams of potatoes? Which symbols represent atoms that are isotopes? Question 7 options: A) C-14 and N-14 B) O-16 and O-18 C) Ca-40 and Ca2+? A cylinder of nitrogen gas has a volume of 20L at SATP. What would the volume of gas be at 30°C with a pressure of 900 kPa? Is cutting down trees helpful or harmful to the environment? Integral of 1+tan^2x/3+tan^2x. pls help to integrate?

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