(a)
Interpretation:
Whether the statement “
Concept introduction:
An exact number is a completely certain number, that is, which can be counted. For example, 1 kilometer has exactly 1000 meter or 1 dozen has 12 number of items, which is also an exact number.
Exact numbers have infinite significant figures and zero error or uncertainty. Example 12 has infinite significant figures but 12.00 has 4 significant figures. To exactly determine the uncertainty in the final answer of measurement, significant figures are calculated.
The rules for counting significant figures will be as follows:
- Numbers that are non-zero are significant figures.
- The zeros preceding numbers that are non-zero are non-significant as they only define the place of decimal.
- The zeros in between numbers that are non-zero are also significant.
- The zeros after numbers that are non-zero are significant only if the decimal is present in the number.
(b)
Interpretation:
Whether the statement “
Concept introduction:
An exact number is a completely certain number, that is, which can be counted. For example, 1 kilometer has exactly 1000 meter or 1 dozen has 12 number of items, which is also an exact number.
Exact numbers have infinite significant figures and zero error or uncertainty. Example 12 has infinite significant figures but 12.00 has 4 significant figures. To exactly determine the uncertainty in the final answer of measurement, significant figures are calculated.
The rules for counting significant figures will be as follows:
- Numbers that are non-zero are significant figures.
- The zeros preceding numbers that are non-zero are non-significant as they only define the place of decimal.
- The zeros in between numbers that are non-zero are also significant.
- The zeros after numbers that are non-zero are significant only if the decimal is present in the number.
(c)
Interpretation:
Whether the statement that “Mount Everest has
Concept introduction:
An exact number is a completely certain number, that is, which can be counted. For example, 1 kilometer has exactly 1000 meter or 1 dozen has 12 number of items, which is also an exact number.
Exact numbers have infinite significant figures and zero error or uncertainty. Example 12 has infinite significant figures but 12.00 has 4 significant figures. To exactly determine the uncertainty in the final answer of measurement, significant figures are calculated.
The rules for counting significant figures will be as follows:
- Numbers that are non-zero are significant figures.
- The zeros preceding numbers that are non-zero are non-significant as they only define the place of decimal.
- The zeros in between numbers that are non-zero are also significant.
- The zeros after numbers that are non-zero are significant only if the decimal is present in the number.
d)
Interpretation:
Whether the statement that “the world record for
Concept introduction:
An exact number is a completely certain number, that is, which can be counted. For example, 1 kilometer has exactly 1000 meter or 1 dozen has 12 number of items, which is also an exact number.
Exact numbers have infinite significant figures and zero error or uncertainty. Example 12 has infinite significant figures but 12.00 has 4 significant figures. To exactly determine the uncertainty in the final answer of measurement, significant figures are calculated.
The rules for counting significant figures will be as follows:
- Numbers that are non-zero are significant figures.
- The zeros preceding numbers that are non-zero are non-significant as they only define the place of decimal.
- The zeros in between numbers that are non-zero are also significant.
- The zeros after numbers that are non-zero are significant only if the decimal is present in the number.
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CHEMISTRY-MOD.MASTERING (18W)
- 1-85 In Japan, high-speed “bullet trains” move with an average speed of 220. km./h. If Dallas and Los Angeles were connected by such a train, how long would it take to travel nonstop between these cities (a distance of 1490. miles)?arrow_forward1. (a) Normally the human body can endure a temperature of 105°F for only short periods of time without permanent damage to the brain and other vital organs. What is this temperature in degrees Celsius? (b) Ethylene glycol is a liquid organic compound that is used as an antifreeze in car radiators. It freezes at 211.5°C. Calculate its freezing temperature in degrees Fahrenheit. (c) The temperature on the surface of the sun is about 6300°C. What is this temperature in degrees Fahrenheit?arrow_forward(a) To three decimal places, what is the volume of a cube (cm3) with an edge length of 0.843 cm?(b) If the cube in part (a) is copper and has a mass of 5.34 g, what is the density of copper to two decimal places?arrow_forward
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- Lignum vitae is a hard, durable, and extremely dense wood used to make ship bearings. A sphere of this wood with a diameter of 7.60 cm has a mass of 313 g. (a) What is the density of the lignum vitae sphere?(b) Will the sphere float or sink in water?(c) Will the sphere float or sink in chloroform? (The density of chloroform is 1.48 g/mL.)arrow_forward(1) A rectangular block of wood has the following dimensions: 10.0 cm x 5.00 cm x 4.00 cm. The block weight 100 g. What is the density of the block of wood? (2) What is the mass of a 400-mL sample of ethyl alcohol if its density is 0.8 g/mL?arrow_forwardPerform the following conversions:(a) 10⁶°F (the body temperature of many birds) to K and C(b) 3410°C (the melting point of tungsten, the highest for anymetallic element) to K and F(c) 6.1X10³K (the surface temperature of the Sun) to °F and °Carrow_forward
- Calculate these volumes.(a) What is the volume of 25 g iodine, density = 4.93 g/cm3?(b) What is the volume of 3.28 g gaseous hydrogen, density = 0.089 g/L?arrow_forwardCalculate the mass of each of the following: (a) a sphere of gold with a radius of 12.9 cm. (The volume of a sphere with a radius r is V = (4/3) πr3; the density of gold is 19.3 g/cm3.) Enter your answer in scientific notation. and form ( answer x 10 ) (b) a cube of platinum of edge length 0.021 mm (density = 21.4 g/cm3). Enter your answer in scientific notation. and form ( answer x 10 ) (c) 37.3 mL of ethanol (density = 0.798 g/mL). garrow_forward. The Empire State Building is 443.2 meters. The height of Kilimanjaro is 19,341 meters.(a) Express each of these heights in scientific notation and use all the digits given.(b) Which is taller? How many orders of magnitude taller?arrow_forward
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