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Show the work explained in class to determine the answers to the following problems:
1 mile = 1.61 km , 12 in = 1 ft , 1cm3 = 1 mL 3.785 L = 1 gal 454g = 1lb
1) A substance has a density of 3.04 g/ml, how many kg does it weigh if the substance has a volume of 425mL?
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2) What is the volume of a solid ( in gallons) that has a mass of 1.57kg if the density is 0.291 g/cm3?
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3) A substance has a density of 0.410 g/ml, how many mg does it weigh if the substance has a volume of 2.1L?
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4) A substance has a density of 12.1 g/ml, how many lbs does it weigh if the substance has a volume of 7.42L?
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5) What is the volume of a solid ( in ml ) that has a mass of 0.621kg if the density is 2.17 g/L ?
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6) Which substances from the problems above (use the question # as reference) would float on water and why? (Hint density of water is 1.00g/ml or 1.00g/cm3 or 1000.g/L)
Answer:
1) 1.29 kg
2) 1.43 gal
3) 8.61E5 gal
4) 198 lb
5) 2.86E5 ml