A raindrop has a mass of 50. mg and the Pacific Ocean has a mass of 7.08 x 10 kg. 20 Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of raindrops? Round your answer to 2 significant digits. How many moles of raindrops are in the Pacific Ocean? Round your answer to 2 significant digits.

A raindrop has a mass of 50. mg and the Pacific Ocean has a mass of 7.08 x 10 kg. 20 Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of raindrops? Round your answer to 2 significant digits. How many moles of raindrops are in the Pacific Ocean? Round your answer to 2 significant digits.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter1: The Nature Of Chemistry

Section1.5: Measurements, Units, And Calculations

Problem 1.5E

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A raindrop has a mass of 50.mg and the Pacific Ocean has a mass of 7.08e20kg. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of raindrops? Round your answer to 2 significant digits. ____g How many moles of raindrops are in the Pacific Ocean? Round your answer to 2 significant digits.
An oxygen atom has a mass of 2.6610−23g and a glass of water has a mass of 0.050kg. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of oxygen atoms? How many moles of oxygen atoms have a mass equal to the mass of a glass of water?
A virus has a mass of 9.0 * 10 to the negative twelth and an oil tanker has a mass of 3.0 * 10 to the seventh kg Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. 1. What is the mass of 1 mole of viruses? g Round your answer to 2 significant digits. 2. How many moles of viruses have a mass equal to the mass of an oil tanker? Round your answer to 2 significant digits.
An aluminum atom has a mass of 4.48×10^-23 g and a small airplane has a mass of 5000. kg. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of aluminum atoms? How many moles of aluminum atoms have a mass equal to the mass of a small airplane?
Performing the same experiment described on your lab manual, a student used a 0.400 g sample of Alka-Seltzer and the mass of CO2 was found to be 0.114 g. Based on this result, answer the following questions: Determine the % mass of NaHCO3 in the sample. (enter your answer to 3 significant digits) Determine the mass of NaHCO3 in the tablet assuming the mass of the tablet is 3.50 g. (enter your answer to 3 significant digits)
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A chemist weighed out 7.2g of mercury. Calculate the number of moles of mercury she weighed out. Be sure your answer has the correct number of significant digits.
Calculate the mass % of "S" in CS2. Round-off your answer to two significant figures and enter the answer below, without any units. How many grams of "S" would be present in a 25 gram sample of CS2? Round-off your answer to two significant figures and enter the answer below, without any units
How many molecules are contained in 5.00 microliters of methanol (CH4O)? The density of methanol is 0.792 g/mL. Use these atomic masses: C = 12.011 amu; H = 1.008 amu; O = 15.999 amu. Input your result in scientific notation using the format with the lower case e representing the x10. For example, in this format the number 1.234x109 would be expressed as 1.234e9. The number 1.234x10-9 would be expressed as 1.234e-9 Not these answers 0.1569 1.23 0.1569 0.0001
From 1962 until 1981 pennies were made from 95% copper and 5% zinc and had a mass of 3.1 g. Starting in 1982, pennies have been made from 97.5% zinc and 2.5% copper and have a mass of 2.5 g. Suppose you have a sample of pennies that consists of 23.8% pre-1982 pennies. Determine the average mass of a penny in this sample. Average mass= grams
use the chart if needed What is the density of a liquid, in g/mL, which has a mass of 1500 mg when the reference liquid used is water with a density of 0.9967 g/mL and a mass of 3 g? A) 4.9835 B) 1.9934 C) 0.4984 D) 0.1993 The experimental Molecular Weight of benzene obtained in one of our class experiments is 77.9924. what is the percentage error? A) 9.754 x 10^-3 B) none of the choices are correct C) 9.744 x 10^-3 D) 9.745 x 10^-3