Homework Answers
4) we knwo that
Density = Mass / Volume
So volume = Mass / Density = 3 / 11.34 = 0.264 mL = 0.26 m L
5) we know that
1miles / hour = 0.447 m /s
So 850 miles / hr = 0.447 X 850 m /s = 379.95 m /s = 380 m/s
6) It is a chemical change as one compound is converted to two compounds
Water is not ionic
It is not a nuclear reaction
Not a physical change
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What is the volume of 3.0 g of lead? The density of lead is 11.34 grid....
37) What is the volume occupied by 4.00 g of O2 gas at STP? A) 2.8...
37) What is the volume occupied by 4.00 g of O2 gas at STP? A) 2.8 mL B) 89.6 L C) 89.6 mL D) 5.6 L E) 2.8 L 38) Which of the followin g expressions is the correct equilibrium-constant expression for the following reaction? CO2 (s)+ 2H2 (g)CH3OH (g) A) [CH30H] (H2]2 CH3OH] co2 CH3OH] CO2H2)2 [CO2l(H212 [CH3OH ICO2l[H2] (CH3OH B) C) D) E) 39) The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0...
Report Sheet: Post-lab Questions (pay attention to significant figures) 1) 50.00 mL of 0.20 M lead...
Report Sheet: Post-lab Questions (pay attention to significant figures) 1) 50.00 mL of 0.20 M lead (II) nitrate solution was added to 30 mL of 1.25 M potassium iodide. These compounds react to form a lead (11) iodide, a bright yellow solid. Both solutions were at room temperature at the start of the reaction (19.6 'C). The final temperature of the reaction mixture was 22.2c. a. Write a balanced equation for this reaction. b. What is the theoretical yield of...
1.Gaseous carbon dioxide has a density of 0.001977 g/mL at standard conditions. What is the mass...
1.Gaseous carbon dioxide has a density of 0.001977 g/mL at standard conditions. What is the mass of 50.00 cm3 of gaseous carbon dioxide? a.0.09885 g b.9.885 g c.3.954 x 10-5 g d.2.529 x 104 g e.0.9885 g 2.The half-life of tungsten-187 is 0.9875 days. How much of a 10.0 gram sample remains after 71.1 hours? a.1.25 g b.5.00 g c.2.50 g d .Not enough information is given. 3 .If 35.0 mL of 0.550 M KOH are needed to neutralize 15.0...
1) 2H2O(g) → 2H2 (g) + O2 (g) DH = 483.6 kJ If 5 moles of...
1) 2H2O(g) → 2H2 (g) + O2 (g) DH = 483.6 kJ If 5 moles of water vapor decompose to form hydrogen and oxygen gas at a pressure of 1.0 atm and 125 oC, what is the change in internal energy of the system? 2)How much heat (in kJ) is evolved when 266 g of white phosphorus (P4 ) burn in air? P4 (s) + 5O2 (g)---> P4O10(s) DH = -3013 kJ 3) A quantity of 1.00 × 102 mL...
.stonl sample of a 60 M solution of HCI is diluted to 200, mL A) 240...
.stonl sample of a 60 M solution of HCI is diluted to 200, mL A) 240 M 8) 6.0 M WI 2.10M D) 1.50 M E) 2.00 M 21) 21) Which one of the following would act like a strong electrolyte in an aqueous solution? A) NH3 B) CH3OH C) CCl4 22) 22) In which of the following pairs of ionic compounds are both chemical species soluble in water? A) Be(NO312 and Bes(PO4)2 C)Cu S and PbBr2 B) NH4F and...
please explain and help calculate the orange cirlced ones L in volume at STP 1. One...
please explain and help calculate the orange cirlced ones
L in volume at STP 1. One mole of an IDEAL GAS occupies a) 12.2 6) 22.4 c) 23.6 d) 40 (2What are the units for the molar volume of a gas? -a) Moles/liter -b) Liters/mole Grams/mole d) Moles/grams What is the gas produce in this experiment CaCO3+ HCI? a) O2 b) CO2 c) NO2 d) H2 e) Natural gas on: 2:23 los molhoz 4 When CaCO3 react with HCI, calculate...
19. What is the mole fraction of H, in a mixture with a total pressure of...
19. What is the mole fraction of H, in a mixture with a total pressure of 800 torr when the partial pressure of H2 is 90 torr? a. 0.11 d. 0.5 b. 8.8 e. 0.88 c. 1.0 20. The kinetic theory of gases assumes that collisions a. with the walls of the container cause energy to be lost. b. of molecules with each other cause energy to be lost. c. are caused by molecules attracting each other. d do not...
The solubility of lead(II) fluoride, PbF_2, in pure water is 2.1 times 10^-3 moles per liter....
The solubility of lead(II) fluoride, PbF_2, in pure water is 2.1 times 10^-3 moles per liter. Calculate the value of K_sp for lead(II) fluoride from this data. a. 1.3 times 10^-7 b. 1.9 times 10^-8 c. 3.7 times 10^-8 d. 1.6 times 10^-9 e. 9.3 times 10^-9 In an experiment, it is planned to add 300 mL of 2.0 times 10^-5 M AgNO_3 to 300 mL of 2.0 times 10^-9 M NaI. Will a precipitate form? What is the precipitate?...
17. When 13.8 ml of 0.870 M lead(II) nitrate reacts with 90.0 ml of 0.777 Msodium chloride, 0.279 kJ of heat is rel...
17. When 13.8 ml of 0.870 M lead(II) nitrate reacts with 90.0 ml of 0.777 Msodium chloride, 0.279 kJ of heat is released at constant pressure. What is Alt for this reaction? Pb(NO ) ) + 2NaCl(a) - PC(s) + 2NaNO3(aq) a 23.3 kJ b. 4 1.84 kJ d. 3.411 e. &J 18. A 1.67-g sample of solid silver reacted in excess chlorine gas to give a 2.21-g sample of pure solid AgCl. The heat given off in this reaction...
finish all of them and show process (g) What is the volume of the oil displaced...
finish all of them and show process
(g) What is the volume of the oil displaced by the block, in terms of the variables of the problem? Vo= Problem 2 - Pressure and Buoyancy with Oil and Water You have a block of a light wood that is 10 cm by 10 cm by 10 cm. You also have a bucket that you fill with a depth of 20 cm of water (has a density of 1000 kg/m'), and then...
37) What is the volume occupied by 4.00 g of O2 gas at STP? A) 2.8 mL B) 89.6 L C) 89.6 mL D) 5.6 L E) 2.8 L 38) Which of the followin g expressions is the correct equilibrium-constant expression for the following reaction? CO2 (s)+ 2H2 (g)CH3OH (g) A) [CH30H] (H2]2 CH3OH] co2 CH3OH] CO2H2)2 [CO2l(H212 [CH3OH ICO2l[H2] (CH3OH B) C) D) E) 39) The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0...
Report Sheet: Post-lab Questions (pay attention to significant figures) 1) 50.00 mL of 0.20 M lead (II) nitrate solution was added to 30 mL of 1.25 M potassium iodide. These compounds react to form a lead (11) iodide, a bright yellow solid. Both solutions were at room temperature at the start of the reaction (19.6 'C). The final temperature of the reaction mixture was 22.2c. a. Write a balanced equation for this reaction. b. What is the theoretical yield of...
.stonl sample of a 60 M solution of HCI is diluted to 200, mL A) 240 M 8) 6.0 M WI 2.10M D) 1.50 M E) 2.00 M 21) 21) Which one of the following would act like a strong electrolyte in an aqueous solution? A) NH3 B) CH3OH C) CCl4 22) 22) In which of the following pairs of ionic compounds are both chemical species soluble in water? A) Be(NO312 and Bes(PO4)2 C)Cu S and PbBr2 B) NH4F and...
please explain and help calculate the orange cirlced ones
L in volume at STP 1. One mole of an IDEAL GAS occupies a) 12.2 6) 22.4 c) 23.6 d) 40 (2What are the units for the molar volume of a gas? -a) Moles/liter -b) Liters/mole Grams/mole d) Moles/grams What is the gas produce in this experiment CaCO3+ HCI? a) O2 b) CO2 c) NO2 d) H2 e) Natural gas on: 2:23 los molhoz 4 When CaCO3 react with HCI, calculate...
19. What is the mole fraction of H, in a mixture with a total pressure of 800 torr when the partial pressure of H2 is 90 torr? a. 0.11 d. 0.5 b. 8.8 e. 0.88 c. 1.0 20. The kinetic theory of gases assumes that collisions a. with the walls of the container cause energy to be lost. b. of molecules with each other cause energy to be lost. c. are caused by molecules attracting each other. d do not...
The solubility of lead(II) fluoride, PbF_2, in pure water is 2.1 times 10^-3 moles per liter. Calculate the value of K_sp for lead(II) fluoride from this data. a. 1.3 times 10^-7 b. 1.9 times 10^-8 c. 3.7 times 10^-8 d. 1.6 times 10^-9 e. 9.3 times 10^-9 In an experiment, it is planned to add 300 mL of 2.0 times 10^-5 M AgNO_3 to 300 mL of 2.0 times 10^-9 M NaI. Will a precipitate form? What is the precipitate?...
17. When 13.8 ml of 0.870 M lead(II) nitrate reacts with 90.0 ml of 0.777 Msodium chloride, 0.279 kJ of heat is released at constant pressure. What is Alt for this reaction? Pb(NO ) ) + 2NaCl(a) - PC(s) + 2NaNO3(aq) a 23.3 kJ b. 4 1.84 kJ d. 3.411 e. &J 18. A 1.67-g sample of solid silver reacted in excess chlorine gas to give a 2.21-g sample of pure solid AgCl. The heat given off in this reaction...
finish all of them and show process
(g) What is the volume of the oil displaced by the block, in terms of the variables of the problem? Vo= Problem 2 - Pressure and Buoyancy with Oil and Water You have a block of a light wood that is 10 cm by 10 cm by 10 cm. You also have a bucket that you fill with a depth of 20 cm of water (has a density of 1000 kg/m'), and then...
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