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20 A raindrop has a mass of 50. mg and the Pacific Ocean has a mass of 7.08 X 10 kg. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. x10 What is the mass of 1 mole of raindrops? g Round your answer to 2 significant digits. X ? How many moles of raindrops are in the Pacific Ocean? Round your answer to 2 significant digits. Evaluate. 1 log 10000 Reminder: When a logarithm is written "log" without an explicit base, it refers to the common logarithm, 1 - log logo log 10000 = 0 No solution X ? A chemist measures the amount of nitrogen gas produced during an experiment. She finds that 77.1 g of nitrogen gas is produced. Calculate the number of moles of nitrogen gas produced. Round your answer to 3 significant digits. mol x10 x Read each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second column. Does any element If you checked yes, give description match the the symbol of an element description? that matches. An element in Period 6 and Group 2A. Yes No A metalloid in Group 4A. Yes No An alkali metal with a lower atomic Yes No number than barium. A transition element in Period 5. Yes No An organic chemist measures the temperature T of a solution in a reaction flask. Here is the result. T= 149.175 °C Convert T to SI units. Round your answer to 3 decimal places. K x10 x ? Decide whether each proposed multiplication or division of measurements is possible. If it is possible, write the result in the last column of the table. proposed Is this result x10 multiplication or division possible? yes . ( 1.0 mg 2 ) (0.015 g) = ? no x 2 3.0 dL yes =? no 0.10 L 2 yes 32. cm = ? 00 no 4.0 cm Decide whether each proposed multiplication or division of measurements is possible. If it is possible, write the result in the last column of the table. proposed Is this result x10 multiplication or division possible? yes - (2.5 dL).(0.20 ) ) no ? yes (90g)-(10g)-7 no yes 7.0 m).(3.0s)=? no

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1. 50*10¯³
7.1*10...

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