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22 Cards in this Set
- Front
- Back
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1-1.
(a) List the SI units of length, mass, time, electric current, temperature, and amount of substance. Write the abbreviation for each. (b) Write the units and symbols for frequency, force, pressure, energy and power. |
(a)
length = mass = time = electric current = temperature = amount of substance = (b) frequency = force = pressure = energy = power = |
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1-2.
Write the name and number represented by each abbreviation. For example, for kW you should write kW = kilowatt = 10^3 watts. (a) mW (b) pm (c) k (d) "micro"C (e) TJ (f) ns (g) fg (h) dPa |
(a) mW
(b) pm (c) k (d) "micro"C (e) TJ (f) ns (g) fg (h) dPa |
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1-3.
Express the following quantities with abbreviations for units and prefixes from Tables 1-1 thought 1-3: (a) 10^(-13) (b) 4.317 28 x 10^(-8) coulombs (c) 2.997 9 x 10^(14) hertz (d) 10^(-10) meters (e) 2.1 x 10^(13) watts (f) 48.3 x 10^-20 moles |
(a) 10^(-13)
(b) 4.317 28 x 10^(-8) coulombs (c) 2.997 9 x 10^(14) hertz (d) 10^(-10) meters (e) 2.1 x 10^(13) watts (f) 48.3 x 10^-20 moles |
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1-4.
Table 1-4 states that 1 horsepower = 745.700 watts. Consider a 100.0-horsepower engine. Express its power output in... (a) watts (b) joules per second (c) calories per second (d) calories per hour |
(a) watts
(b) joules per second (c) calories per second (d) calories per hour |
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1-5.
(a) Refer to Table 1-4 and calculate how many meters are in 1 inch. How many inches are in 1 m? (b) A mile is 5 280 feet and a foot is 12 inches. The speed of sound in the atmosphere at sea level is 345 m/s. Express the speed of sound in miles per second and miles per hour. (c) There is a delay between lightning and thunder in a storm because light reaches us almost instantaneously, but sound is slower. How many meters, kilometers, and miles away is lightning if the sound reaches you 3.00 s after the light? |
(a)
(b) (c) |
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1-6.
Define the following measures of concentration: (a) molarity (b) molality (c) density (d) weight percent (e) volume percent (f) parts per million (g) parts per billion (h) formal concentration |
(a) molarity
(b) molality (c) density (d) weight percent (e) volume percent (f) parts per million (g) parts per billion (h) formal concentration |
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1-7.
What is the formal concentration (expressed as mol/L = M) of NaCl when 32.0 g are dissolved in water dilluted to 0.500 L? |
FC=
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1-8.
If 0.250 L of aqueous solution with a density of 1.00 g/mL contains 13.7 "micro"g of pesticide, express the concentration of pesticide in... (a) ppm (b) ppb |
(a) concentration in ppm =
(b) concentration in ppb = |
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1-9.
The concentration of the sugar glucose (C_6H_12O_6) in human blood ranges from about 80 mg/dL before meals to 120 mg/dL after eating. Find the molarity of glucose in blood before and after eating. |
M =
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1-10.
Hot perchloric acid is a powerful (and potentially explosive) reagent used to decompose organic materials and dissolve them for chemical analysis. (a) How many grams of perchloric acid (HClO_4), are contained in 100.0 g of 70.5 wt% aqueous perchloric acid? (b) How many grams of water are in 100.0 g of solution? (c) How many moles of HClO_4 are in 100.0 g of solution? |
(a) grams perchloric acid =
(b) grams of water = (c) moles of perchloric acid = |
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1-11.
How many grams of boric acid [B(OH)_3, FM 61.83] should be used to make 2.00 L of 0.050 M solution? |
grams of boric acid =
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1-12.
Water is fluoridated to prevent tooth decay. (a) How many liters of 1.0 M H_2SiF_6 should be added to a reservoir with a diameter of 100 m and a depth of 20 m to give 1.2 ppm F^-? (Remember that 1 mol H_2SiF_6 contains 6 mol F.) (b) How many grams of solid H_2SiF_6 should be added to the same reservoir to give 1.2 ppm F^-? |
(a) liters of H_2SiF_6 =
(b) grams of solid H_2SiF_6 = |
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1-13.
How many grams of 50 wt% NaOH (FM 40.00) should be diluted to 1.00 L to make 0.10 M NaOH? |
grams of NaOH =
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A bottle of concentrated aqueous sulfuric acid, labeled 98.0 wt% H_2SO_4, has a concentration of 18.0 M.
(a) How many milliliters of reagent should be diluted to 1.00L to give 1.00 M H_2SO_4? (b) Calculate the density of 98.0 wt% H_2SO_4. |
(a) mL of reagent =
(b) density = |
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1-15.
How many grams of methanol (CH_3OH, FM 32.04) are contained in 0.100 L of 1.71 M aqueous methanol? |
Grams of methanol =
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1-16.
A dilute aqueous solution containing 1 ppm of solute has a density of 1.00 g/mL. Express the concentration of solute in g/L, "micro"g/L, "micro"g/mL, and mg/L. |
g/L =
"micro"g/L = "micro"g/mL = mg/L = |
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1-17.
The concentration of C_20H_42 (FM 282.55) in winter rainwater in Figure 1-4 is 0.2 ppb. Assuming the density of rainwater is close to 1.00 g/mL, find the molar concentration of C_20H_42. |
molar concentration =
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1-18.
A 95.0 wt% solution of ethanol (CH_3CH_2OH, FM 46.07) in water has a density of 0.804 g/mL. (a) Find the mass of 1.00 L of this solution and the grams of ethanol per liter. (b) What is the molar concentration of ethanol in this solution? |
(a) mass =
(b) molar concentration = |
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1-19.
(a) How many grams of nickel are contained in 10.0 g of a 10.2 wt% solution of nickel sulfate hexahydrate, NiSO_4 * 6H_2O (FM 262.85)? (b) The concentration of this solution is 0.412 M. Find its density. |
(a) grams of nickel =
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1-20.
A 500.0 mL solution was prepared by dissolving 25.00 mL of methanol (CH_3OH, density = 0.791 4 g/mL) in chloroform. Find the molarity of the methanol. |
Molarity =
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1-21.
Describe how to prepare exactly 100 mL of 1.00 M HCl from 12.1 M HCl reagent. |
Decription:
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1-22.
Cesium chloride is used to prepare dense solutions required for isolating cellular components with a centrifuge. A 40.0 wt% solution of CsCl (FM 168.36) has a density of 1.43 g/mL. (a) Find the molarity of CsCl. (b) How many milliliters of the concentrated solution should be diluted to 500 mL to make 0.100 M CsCl? |
(a) molarity =
(b) milliliters = |
