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Calcium in a 5.55ml sample was? Which is the strongest acid in order from strongest to weakest: acetic acid, propanoic acid, and formic acid? 3x^3 -4y^4=2 How can I determine if this is a function or not? If 400 g of water are produced from combustion of ethane, how many grams of thane reacted? and how to calculate.? If the equation y = x + 4 is changed to y = x - 2, how will the graph of the equation change?