non-math content
What SI unit/dimension measured the amounts of particles of a substance?
moles
convert 1.35 km to mm
1,350,000 mm
What is the sum of 36.4 km + 1400 m?
37.8 km
Find the area of a rectangle with a length of 4.5 m and a width of 0.8 m
3.6 m2, but because 0.8 m has 1SD
= 4 m2
1.003 m
4 SD
If a measuring device is not digital, it is called
analog
Write 0.00000540 m in scientific notation with correct SD
5.40 x 10-6 m
Find the sum of 38.4 g +40.26 g +18 g
precise to the ones place
97 g
What volume does a cube with a length of 3.0 cm, width of 1.08 cm and a height of 15.3 cm?
2 SD
50. cm2
4600 L
2 SD
What is the official SI unit for mass?
kg
not g
conversion factor
What is the percent error if you measure a sample to be 38.6 g where it should have been 40.0 g?
(|40.0-38.6|/40.0) x 100% = 3.5%
If a single book measures 35.4 cm long, how long would 6 books back to back be? (in correct SD)
6 is a pure number, so the answer maintains the original precision
212.4 cm
0.00450 kg
3 SD
Which metric prefix refers to a billionth of the base unit (10-9)
nano-
Convert 0.00052 mm to nm
520 nm
Find the sum of 36.4 m + 1400 m with correct SD
precise to the nearest hundred meters
therefore, 1436.4 = 1400 m :)
What is the volume of a 35.4 g sample of iron with a density of 7.62 g/mL (hint: use the bridge notation and take note of where the units are)
4.65 mL
3600. g
4 SD
Units of measurement that come from basic SI units are called
derived units
What is the product of (15.0 cm)(0.460 m)
3SD
690. cm2 or 0.0690 m2
convert 135 mph to m/s if 1.6 km = 1 mi
3SD
60.4 m/s
solve this problem with correct SD
(26.3 g - 14.05 g)/(0.058 mL + 1.15 mL)
10.1666 g/mL
but, 3 SD on top and bottom,
=10.2 g/mL
If you have a device that is precise to the nearest 100 g and you get a measurement of 10,000 g, how would you write this value in correct SD's?
1.00 x 104