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39 Which statement about aqueous ethanoic acid is correct? A It reacts with magnesium to produce a salt and hydrogen. B It reacts with sodium hydroxide to produce a salt and hydrogen. C It reacts with ammonium salts to produce ammonia.
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1. Decane has a freezing point of –30 °C and a boiling point of 174 °C. A small sample of decane is placed in an open beaker in an oven at a temperature of 120 °C and at atmospheric pressure for ...
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4 Which statement explains why metals conduct electricity when solid? A They have atoms which are free to move. B They have electrons which are free to move. C They have molecules which are free to move. D They have positive ions which are ...
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2. A student put exactly 25.00 cm^3 of dilute hydrochloric acid into a conical flask. The student added 2.5 g of solid sodium carbonate and measured the change in temperature of the mixture. Which apparatus ...
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3 A student separates sugar from pieces of broken glass by dissolving the sugar in water and filtering off the broken glass. What is the filtrate? A broken glass only B broken glass and sugar solution
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