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Answers to 1.5.1

Answers to 1.5.1. 1. Suppose you have 50 g of rice and 50 g of beans. Which sample has more mass? . Trick Question!!!! They have the same amount of mass! (50 g!). Which sample has more pieces? Explain! . The rice sample has more pieces because they’re smaller than beans.

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Answers to 1.5.1

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  1. Answers to 1.5.1

  2. 1. Suppose you have 50 g of rice and 50 g of beans. Which sample has more mass? Trick Question!!!! They have the same amount of mass! (50 g!) Which sample has more pieces? Explain! The rice sample has more pieces because they’re smaller than beans.

  3. 2. Suppose you have 200 grapes and 200 apples. Which sample has more mass? The 200 apples because each apple weighs much more than a grape! Which sample has more pieces? Explain! TRICK QUESTION!!!! They have the same # of pieces! (200)

  4. A sample of 50 beans has a mass of 14.5 grams. a. What would be the mass of 100,000 beans? Mass Ratio: 14.5 grams/50 beans = 0.29 g bean 100,000 beans x 0.29 g = 29,000 grams bean

  5. A sample of 50 beans has a mass of 14.5 grams. b. One bag of beans has a mass of 1500 g. How many beans are in the bag? Mass Ratio: 14.5 grams/50 beans = 0.29 g bean 1500 grams 0.29 g = 5,172 beans bean

  6. 1 1 = beans beans

  7. A sample of 15 cheerios has a mass of 2.5 grams. a. A box of cheerios has a mass of 455 grams. How many Cheerios are in the box? Mass Ratio: 2.5 grams/15 cheerios= 0.17 g cheerio 455 grams 0.17 g = 2676 cheerios cheerio

  8. 1 1 = cheerios cheerio

  9. A sample of 15 cheerios has a mass of 2.5 grams. b. How much would 200 cheerios weigh? Mass Ratio: 2.5 grams/15 cheerios= 0.17 g cheerio 200 cheerios x 0.17 g = 34 grams cheerio

  10. 5. A sample of 100 grains of sand weight about 0.12 grams. You have a 5 kg (5000 g) bag of sand—how many grains of sand are in the bag? Mass Ratio: 0.12 grams/100 grains= 0.0012 g grain 5000 grams 0.0012 g = 4,166,666 grain grains!

  11. Convert the following numbers to scientific notation: a) 78,938,000 b) 0.00000003809 c) 2,000 d) 0.00200 7.8938 x 107 3.809 x 10-8 2 x 104 2.00 x 10-3

  12. 2) Convert the following numbers from scientific notation to standard notation: a) 3.08 x 103 b) 9.0 x 10-8 c) 4.20 x 10-3 d) 6.02 x 1023 3,080 0.000000090 0.00420 602000000000000000000000

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