Classifying Matter
what is the term for combining 2 or more different atoms together?
Compound
what is the formula for density?
d= m/v
Round 0.000897 to 1 sig-fig
0.0009
How many decades are equal to 1.7 x 10^25 minutes?
52 weeks= 1 year, 10 years=1 decade
3.1018 decades
a chemical change can be _______ by simple physical methods such as heating and or cooling?
Reversed
Combinations of 2 or more substances that are physically blended together?
Mixture
wood has a density of 0.53 grams/centimeter cubed. What is the volume of 33.3 grams of wood?
62.83 cm^3
Round 2599.999 to 1 sig fig
3000
how many mg are in 20.0 kg? Answer in scientific notation.
2.00 x 10^7 mg
what kind of matter is air?
Homogeneous mixture
copper has a density of 8.9cm^3. What is the volume of 2.789 g of copper?
0.31 cm^3
Round 0.0059925 to 2 sig-figs
0.0060
made up of one type of atom?
element
a gold bar has a mass of 12.4 kg and a density of 19.3g/cm^3. What is the volume of the bar?
642 cm^3
multiply and answer in sig figs: 1.008 x 4.67
4.71
Composition varies by sample?
Mixture
A bottle contains 16 fluid ounces of liquid. If the mass of a full bottle is 3.30x 10^3 grams and the mass of an empty bottle is 1.70x10^3 grams, what is the density of the liquid?
3.38grams/cm^3
Simply the expression according to sig-figs: 3.52^2 x 6.550 x square root of 25 / 0.045
9017
1 mole of Si atoms contains 6.02 x 10^23 Si atoms. 6.02 x 10^23 atoms of Si have a mass of 28.1 grams. How many atoms of Si are contained in a computer chip that masses 38.02 mg?
8.145 x 10^26 atoms of Si