Problem 1 Do the following conversions a. 0.8 cm = mm b. 450,000 nm = m c. 19 kg = g d. 185,000 ml = kl Chemistry basics problem relay significant figures,

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Presentation transcript:

Problem 1 Do the following conversions a. 0.8 cm = mm b. 450,000 nm = m c. 19 kg = g d. 185,000 ml = kl Chemistry basics problem relay significant figures, math and atoms

Problem 2 How many milliseconds has a 95-year-old lived through (365 days in a year)? Chemistry basics problem relay significant figures, math and atoms

Problem 3 Write in scientific notation. a. 7,456,000,000 = __________ b = __________ Chemistry basics problem relay significant figures, math and atoms Write in regular notation. c. 3 x 10 8 = __________ d x = __________

Problem 4: Solve for x (3x + 4)/2 = 20(x +3) Chemistry basics problem relay significant figures, math and atoms

Problem 5: Find the average atomic mass of element X, name X and write the symbol for each isotope of X and explain the number of protons, neutrons and electrons X has. element X Mass Exact Percent number mass abundance Chemistry basics problem relay significant figures, math and atoms

Problem 6: Sig Figs! a. How many significant figures are in cm? b L + 11 L = c m / 3.00 s = d. Calvin and Hobbes are doing an experiment to find the density of Hobbes. Calvin placed Hobbes into a huge graduated cylinder that had some water in it. The water started out at 5.00 L and it rose to L. Calvin also massed Hobbes, and he was approximately 50 kg. What is the density of Hobbes? Does he float? (The density of water is 1000 g/L.) Chemistry basics problem relay significant figures, math and atoms