1st NINE WEEKS STUDY GUIDE
1. You must be able to write the metric number line from the mega prefix to the micro prefix.
2. You must be able to convert units using the metric number line.
86.98cm = _______hm .0007mg = _______cg 2.8m = _______µm
22.25kg = .02225______ .0006cl = 6.0_______ 1.24kb = .00124_______
.005kg < = > 50g 24.85µl < = > .02485ml 1.67dg < = > 16.7mg
3. You must be able to determine the number of significant figures in a number.
.0013____ 1002____ 12.003____ 1.26x10-4____ 1.000____ 21000____
4. You must be able to use proper scientific notation.
(convert the following to proper scientific notation with three sig/figs)
12560_______ .001235_______ 21.87_______ .0003605_______
(expand the following)
1.856x103_______ 7.53x10-4_______ 25.576x101_______ 1.23x10-2_______
5. You must be able to use the proper number of significant figures in calculations.
(using the proper number of sig/figs calculate the following)
123.57 + 3.5 + .45 = _______ 1.61 + 23.56 + .997 = _______ 2.8 + 3.7676 + 535.65 = _______
2.68 x 35 = _______ 300 x 5 = _______ 28.67 x 3.56 _______ 1234.5 x 6789.1 = _______
385.9 ÷ 2.3 = _______ 27.7 ÷ 112.7 = _______ 305 ÷ 25 = _______ 2.6 ÷ 7.9 = _______
6. You must be able to calculate mass, volume and density using the proper units.
The mass of an unknown liquid is 46.7g when the volume is 18.6ml what is the density of the
liquid.
Calculate the volume of an unknown metal that has a density of 7.96g/cm3 and mass of 119.4g.
Calculate the mass a rock with a density of 2.75g/cm3 that displaces 4.5ml of water when placed
in a graduated cylinder.
7. You must be able to identify Charles’ law, Boyle’s law, Lussac’s law and the Combined Gas law .
(P1V1 = P2V2)_____ (P1/T1 = P2/T2)_____ (V1/T1 = V2/T2)______ (P1V1/T1 = P2V2/T2)_____
8. You must be able to use the gas laws in calculations using the proper units.
The volume of a gas at 99.0kPa is 300ml. if the pressure is increased to 188.0kPa, what will be
the new volume?
The volume of an unknown gas is decreased from 3.5L to 1.25L, the final pressure is 1255mm Hg
what was the initial pressure.
A gas at 362.0K occupies a volume of 0.67L. At what Kelvin temperature will the volume increase
to 1.12L.
The Celsius temperature of a 3.00L sample of a gas is lowered from 80°C to 30°C. What will the
resulting volume of the gas be?
The pressure in a ball is 782mm Hg when the temperature is 285K, what is new pressure if the
temperature is raised to 306K.
A sample of gas in a tank with a valve rating of 10.0atm is heated in small fire from 25 degrees
Celsius to 38 degrees Celsius, if the original pressure in the tank is 9.7atm will the valve fail.