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What is the surface area of a sphere with a radius of 30 m? 1,800π m2 90,000π m2 3,600π m2 900π m2

asked Apr 21, 2016

Mathematics
high-school

2 answers

0 votes

183k views

If 0.025 gram of Pb(NO3)2 is dissolved in 100. grams of H2O, what is the concentration of the resulting solution, in parts per million? (1) 2.5 × 10–4 ppm (3) 250 ppm (2) 2.5 ppm (4) 4.0 × 103 ppm

asked Mar 1, 2016

Chemistry
high-school

1 answer

2 votes

38.5k views

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