Dimensional Analysis
How many seconds are in 2 days?
172,800
How many significant figures in 90
1
0.000506 mL
5.06 x 10-4 mL
Limestone has a density of 2.72 g/cm3 what is the mass of 24.9 cm3 of limestone?
67.7 g
0.00600 m / 0.030 s
0.20 m/s
convert 150 minutes to hours
2.5 hours
How many significant figures in 7,001
4
42,000,000,000 mm
4.2 x 1010 mm
A flask has a capacity of 2.5 x 102 mL. How many grams of water will the flask hold? (hint:use the density of water = 1.0 m/mL)
2.5 x 102
(6.91 x 10-2) + (2.4 x 10-3)
1.6 x 10-4
Mark McGuire of the st. Louis Cardinals hit 70 homeruns in the 1998 season. Given that there are 4.0 bases with 90 ft. between each base, how many miles did mark run that season just from homeruns? (5280 ft. = 1 mile)
4.77 miles
How many significant figures are in 12,000.
5
23.999 L
2.399 x 101 L
a platform balance showed the mass of a molded glass figurine to be 247.6 g. When immersed in water, the figure displaced 83.9mL. What is the density of the glass?
2.95 g/mL
(50.75 mL) + (155 mL)
205 mL
A school has 5 hallways. In each hallway there are 50 rooms. There are 20 lockers outside of each room. Each locker is shared by 2 students. Each student has 5 pencils in his/her locker. Assuming every locker is used, how many pencils are found in the lockers at school.
50,000 pencils
How many Significant Figures in 0.0001
1
4.99 x 102 cm
499 cm
a rectangular block of copper metal has a mass of 2297 g. The dimensions of the block are 3.2 cm by 4.4 cm by 7.5 cm From this data what is the density of copper?
240000 g/cm3
(1.33 x 105) - (4.9 x 104)
8.4 x 104
A modern tennis match at the elite level lasts on the average about 30 minutes. Top players often smash the ball at speeds exceeding 0.0447 km per second. Convert this speed to miles per hour (1 mi = 1.609)
100 mph
How many significant figures are in 1.000
4
5.00 x 10-3 g
0.00500 g
77.65 g of iron is added to a graduated cylinder containing 33.71 mL of water. The water level rises to the 72.96 mL mark. From this information, calculate the density of iron.
1.978 g.mL
(4.3 x 108) x (2.0 x 106)
8.6 x 1014