Maria wanted to bring back 5 million grains of sand from her trip to the beach. Each grain of sand weighs approximately 6.7 times 10^-7 kg. How heavy is the bag of sand that Maria brings home?
To find the total weight of the 5 million grains of sand, we can calculate:
Total weight = (5 million grains) x (6.7 x 10^-7 kg/grain)
Total weight = 5 x 10^6 x 6.7 x 10^-7 kg
Total weight = 33.5 x 10^-1 kg
Total weight = 3.35 kg
Therefore, the bag of sand that Maria brings home will weigh approximately 3.35 kg.