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Q9: Which of the following hydrocarbons has a
Q36: Citric acid is found in citrus fruit,such
Q39: A fuel cell contains hydrogen and oxygen
Q45: What is the term for the base
Q46: Which of the following are base units
Q49: What is the symbol for the element
Q62: What are the products from the reaction
Q147: Element Z has two natural isotopes: Z-79
Q163: According to the metric system,1 s =
Q168: What is the symbol for the metric