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Unformatted text preview: 2 cross-sectional area can hold up to 3.5 x 10 4 kg. The tensile strengths of aluminum and Steel No. 5137 are 2.5 x 10 4 lb/in 2 and 35.0 x 10 4 lb/in 2 , respectively. Calculate the cross-sectional area (in cm 2 ) of bars of aluminum and Steel No.5137 that have the same tensile strength as a bar of grunerite with a cross-sectional area of 25 mm 2 . 5) Earths oceans have an average depth of 3800 m, a total area of 3.63 x 10 8 km 2 , and and average concentration of dissolved gold of 5.8 x 10-9 g/L. (a) How many grams of gold are in the oceans? (b) How many m 3 of gold are in the oceans? (c) Given the current price of gold at $892.00/troy oz, what is the value of gold in the oceans? 6) If a raindrop weighs 65 mg on average and 5.1 x 10 5 raindrops fall on a lawn every minute, what mass (in lbs) of rain falls on the lawn in 1.5 hours? From Silberberg, Principles of General Chemistry 1 st Ed....
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- Spring '11