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Chem 120 Test 1
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Exam of 12 pages for the course Chem 120 Test 1 at Chem 120 Test 1 (Chem 120 Test 1)
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Chem 120 Test 1formulation of a hypothesis, development of a hypothesis, prediction, testing
prediction, analysis of experiment - -What are the steps of the scientific
method?
-qualitative - -What kind of data contains no numerical information?
-quantitative - -What kind of data contains numbers and a scale (unit)?
-qualitative - -Qualitative or quantitative?
Extracts from Pacific-yew bark kill cancer cells.
-quantitative - -Qualitative or quantitative?
Compound "13a" is twenty times more effective than paclitaxel in killing
ovarian cancer cells.
-grams (g) - -SI unit for mass
-meters (m) - -SI unit for length
-liters (L) - -SI unit for volume
-joule (J) - -SI unit for energy
-Kelvin (K) or Celsius (degrees C) - -SI unit for temperature
-mole (mol) - -SI unit for amount of something
-seconds (s) - -SI unit for time
-10^6 - -factor for mega (M)
-10^3 - -factor for kilo (k)
-10^-1 - -factor for deci (d)
-10^-2 - -factor for centi (c)
-10^-3 - -factor for milli (m)
-10^-6 - -factor for micro
-10^-9 - -factor for nano (n)
, -10^-12 - -factor for pico (p)
-10^-15 - -factor for femto (f)
-do not - -Leading zeros are zeros that precede all the nonzero digits. These
________ count as significant figures. (do/do not)
-do - -Captive zeros are zeros between nonzero digits. These _______ count
as significant figures. (do/do not)
-do not, do - -Trailing zeros are zeros at the right end of the numbers. They
______ count as significant figures if the number DOES NOT contain a decimal
point. They ________ count as significant figures if the number DOES contain
a decimal point. (do/do not)
-2 - -How many significant figures are in 0.048?
-4 - -How many significant figures are in 16.07?
-4 - -How many significant figures are in 9.300?
-2 - -How many significant figures are in 150?
-3 - -How many significant figures are in 2.12?
-4 - -How many significant figures are in 4.500?
-4 - -How many significant figures are in 0.002541?
-3 - -How many significant figures are in 0.00100?
-3 - -How many significant figures are in 500. ?
-2 - -How many significant figures are in 5.0x10^2?
-smallest number of decimal places in input = number of decimal places in
final answer - -What is the rule for significant figures with addition and
subtraction?
-smallest number of sig figs in input = number of sig figs in final answer - -
What is the rule for significant figures with multiplication and division?
-one - -Scientists typically report a number with _____ uncertain digit.
-up - -In rounding rules, if the 1st non-significant digit is >5, round ____.
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