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45 is 20% of what number
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Math
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anonymous
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atom has mass number of 45 and atomic number of 20 what is the proton
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During a heavy downpour, 3.6 cm of the rain fell on the whole of Singapore. If total area of Singapore is 660 Km^2, calculate the number of litres of water that fell on Singapore during the downpour
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During a heavy downpour 3.6 cm rain fell on an island and if the total area of the island is 660 kmĀ², calculate the number of litres that fell on the island.
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56 is 140% of what number?
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A certain ion has an atomic number of 16, a mass number of 33,and 18 electrons. What is the charge on the ion? What is the identity of this ion? How many neurons does the nucleus of this ion have?
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