Reference no: EM132650818
If someone would be able to assist me with these 15 Questions, that would be great. My textbook doesn't show 100% how to solve/get answers. I do have an upcoming test on this material, so if you could show and explain your answers that would be greatly appreciated.
1) Determine the number of significant figures in each of the following measured values.
a) 0.444
b) 0.00444
c) 0.04040
d) 0.00004
2) Round off each of the following numbers to the number of significant figures indicated in parentheses.
a) 0.350763 (four)
b) 13.43 (three)
c) 22.4555 (two)
d) 0.030303 (three)
3) Carry out the following additions and subtractions, expressing your answer to the correct number of significant figures. Assume that all numbers are measured numbers.
a) 12 + 23 + 127
b) 3.111 + 3.11 + 3.1
c) 1237.6 + 23 + 0.12
d) 43.65 - 23.7
4) For each of the following numbers, will the exponent be positive, negative, or zero when the number is expressed in scientific notation?
a) 0.0123
b) 375,000
c) 0.100
d) 68.75
5) Express the following measured values in scientific notation to the correct number of significant figures.
a) 120.7
b) 0.0034
c) 231.00
d) 23,100
6) Carry out the following multiplications and divisions, expressing your answer in scientific notation to the correct number of significant figures.
a) (3.20 x 107) x (1.720 x 105)
b) (1.00 x 103) x (5.00 x 103) x (3.0 x 10-3)
c) 3.0 x 10-5 / 1.5 x 102
d) (2.2 x 106) x (2.3 x 10-6) / (1.2 x 10-3) x (3.5 x 10-3)
7) Write each of the following numbers in scientific notation to the number of significant figures indicated in parentheses.
a) 0.00300300 (three)
b) 936,000 (two)
c) 23.5003 (three)
d) 450,000,001 (six)
8) Give the two forms of the conversion factor that relate each of the following pairs of units.
a) days and hours
b) decades and centuries
c) feet and yards
d) quarts and gallons
9) Using dimensional analysis, convert each of the following measurements to meters
a) 1.6 x 103 dm
b) 24nm
c) 0.003 km
d) 3.0 x 108mm
10) An individual weighs 83.2 kg and is 1.92m tall. What are the person's equivalent measurements in pounds and feet?
11) A sample of mercury is found to have a mass of 524.5g and to have a volume of 38.72cm3. What is its density in grams per cubic centimeter?
12) Air has a density of 1.29 g/L at room temperature. State whether each of the following will rise or sink in air.
a) Helium gas (density = 0.18 g/L)
b) Argon gas (density = 1.78 g/L)
13) An oven for baking pizza operates at approximately 525 deg F. What is this temperature in Celsius?
14) Mercury freezes at -38.9 deg C. What is the coldest temperature, in degrees Fahrenheit, that can be measured using a mercury thermometer?
15) Which is the higher temperature, -15 deg C or 4 deg F?