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Chemistry 102
July 2023
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Chemistry 102 Q&A Archive of July 14, 2023

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July 14 of 2023

For the following reaction, 81.6 grams of barium chloride are allowed to react with 71.4 grams of potassium sulfate . barium chloride ( aq ) + potassium sulfate ( aq ) barium sulfate ( s ) + potassium chloride ( aq ) What is the maximum amount of barium sulfate that can be formed? …

A metal cube with a mass of 55 g at temperature of 85°C is immersed in 150 g of water at temperature of 20°C. The metal and water than reach a final temperature of 23°C. How much heat does the water Gain? Specific heat of water, which is 4.184 J/g C.

thoughtful

When 11.48 g of chlorine reacts with excess phosphorus according to the phone equation? 2P + 5CL2 = 2PCl5 Heat change -886 KJ

How much heat is released when 24.77 g of ethanol (C2H5OH) react with excess O2 according to the following equation: C2H5OH + 2O2 v 2CO2 + 3H2O change in heat = -1366.7 KJ

Given the thermodynamic data in the table below, calculate the equilibrium constant (at 298 K) for the reaction: 2 SO2 (g) + O2 (g) --> 2 SO3 (g) Subastance DH S SO2 -297 249 O2 0 205 SO3 -395 256 2.40 * 10^24 1.06 1.95 3.82 * 10^23 More data are needed.

What is the initial concentration of iodine in the reaction, initial thiosulfate, and initial concentration of hydrogen peroxide.

how much heat will be released when 14.72 g of carbon reacts with excess O2 according to the following equation: C +O2 = CO2 ?H= -393.5 kj

Delta S is positive for the reaction ________. 2H2 (g) + O2 (g) → 2H2O (g) 2NO2 (g) → N2O4 (g) CO2 (g) → CO2 (s) BaF2 (s) → Ba2+ (aq) + 2F- (aq) 2Hg (l) + O2 (g) → 2HgO (s)

Categorize the solutes given below by their ideal van't Hoff factor. CH3OH KBr K2SO4 (NH4)2CO3 C6H12O6 Sc(NO3)3 CaS LiC2H3O2 MgF2 Na3PO4 H2O CaCl2 i = 1 i = 2 i = 3 i = 4

What are the necessary conditions to calculate the mass balance of this process?

Why aren't all drugs received fully profiled?

If the path length used in the experiment with Red #40 Food Dye was ( 1.0 cm ) what is the molar absorptivity for Red ( # 40 ) food dye?

N2O + 2Zn(OH)4^2- --> 2Zn + 2NO2-+ 3 H2O+ 2 OH^- In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. name of the element oxidized: fill in the blank 1 name of the element reduced: fill…

Write an equation to show that nitrous acid , HNO2 , behaves as an acid in water.

Under certain conditions, the substances diphosphorus pentoxide and water combine to form phosphoric acid. If 25.3 grams of diphosphorus pentoxide and 9.6 grams of water combine to form phosphoric acid, how many grams of phosphoric acid must form? Mass = g

In the laboratory, a student dilutes 28.0 mL of a 9.96 M hydrobromic acid solution to a total volume of 150.0 mL. What is the concentration of the diluted solution? Concentration = M

What volume of a 0.241 M hydrobromic acid solution is required to neutralize 24.7 mL of a 0.167 M sodium hydroxide solution? mL hydrobromic acid

A 80.0 g sample of copper (specific heat 0.20J/g degrees Celsius) is heated and then added to 100 g water at 22.3°C. The final temperature of the water and copper is 26.9°C. What is the original temperature of the copper sample, assuming that all the heat loss by the copper is gained by the…

A sample of oxygen gas collected at a pressure of 0.657 atm and a temperature of 293 K is found to occupy a volume of 639 milliliters. How many moles of gas are in the sample? mol

A 65.0 g sample of copper (specific heat = 0.20 j/g degrees Celsius) is heated to 97.6 degrees Celsius and then placed in a container of water at 20 degrees Celsius. The final temperature of the water and cooper is 24.9 degrees Celsius. What is the mass of the water in the container, assuming…

Four samples were weighed using three different balances. (All are as accurate as the precision indicates.) The masses are 0.94 kg, 58.2 g, 1.55 g, and 250 mg. The total mass should be reported as:

75.0 g sample of a metal at 65 degrees is added to 100.0 g of water at 20.0 degrees Celcius. The temperature of the water rises to 22.3 degrees Celsius . calculate the specific heat of the metal, assuming that all the heat lost by the metal is gained by the water

A 1320 g block of lead initially at 35 degrees Celsius absorbs 3044 j of heat. What is the final temperature of the lead? ( The specific heat of lead is 0.16 j/g degrees Celsius.

For the following reaction, 81.6 grams of barium chloride are allowed to react with 71.4 grams of potassium sulfate . barium chloride ( aq ) + potassium sulfate ( aq ) barium sulfate ( s ) + potassium chloride ( aq ) What is the maximum amount of barium sulfate that can be formed? …

A metal cube with a mass of 55 g at temperature of 85°C is immersed in 150 g of water at temperature of 20°C. The metal and water than reach a final temperature of 23°C. How much heat does the water Gain? Specific heat of water, which is 4.184 J/g C.

thoughtful

When 11.48 g of chlorine reacts with excess phosphorus according to the phone equation? 2P + 5CL2 = 2PCl5 Heat change -886 KJ

How much heat is released when 24.77 g of ethanol (C2H5OH) react with excess O2 according to the following equation: C2H5OH + 2O2 v 2CO2 + 3H2O change in heat = -1366.7 KJ

Given the thermodynamic data in the table below, calculate the equilibrium constant (at 298 K) for the reaction: 2 SO2 (g) + O2 (g) --> 2 SO3 (g) Subastance DH S SO2 -297 249 O2 0 205 SO3 -395 256 2.40 * 10^24 1.06 1.95 3.82 * 10^23 More data are needed.

how much heat will be released when 14.72 g of carbon reacts with excess O2 according to the following equation: C +O2 = CO2 ?H= -393.5 kj

Delta S is positive for the reaction ________. 2H2 (g) + O2 (g) → 2H2O (g) 2NO2 (g) → N2O4 (g) CO2 (g) → CO2 (s) BaF2 (s) → Ba2+ (aq) + 2F- (aq) 2Hg (l) + O2 (g) → 2HgO (s)

Categorize the solutes given below by their ideal van't Hoff factor. CH3OH KBr K2SO4 (NH4)2CO3 C6H12O6 Sc(NO3)3 CaS LiC2H3O2 MgF2 Na3PO4 H2O CaCl2 i = 1 i = 2 i = 3 i = 4

N2O + 2Zn(OH)4^2- --> 2Zn + 2NO2-+ 3 H2O+ 2 OH^- In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. name of the element oxidized: fill in the blank 1 name of the element reduced: fill…

Write an equation to show that nitrous acid , HNO2 , behaves as an acid in water.

Under certain conditions, the substances diphosphorus pentoxide and water combine to form phosphoric acid. If 25.3 grams of diphosphorus pentoxide and 9.6 grams of water combine to form phosphoric acid, how many grams of phosphoric acid must form? Mass = g

In the laboratory, a student dilutes 28.0 mL of a 9.96 M hydrobromic acid solution to a total volume of 150.0 mL. What is the concentration of the diluted solution? Concentration = M

What volume of a 0.241 M hydrobromic acid solution is required to neutralize 24.7 mL of a 0.167 M sodium hydroxide solution? mL hydrobromic acid

A 80.0 g sample of copper (specific heat 0.20J/g degrees Celsius) is heated and then added to 100 g water at 22.3°C. The final temperature of the water and copper is 26.9°C. What is the original temperature of the copper sample, assuming that all the heat loss by the copper is gained by the…

A sample of oxygen gas collected at a pressure of 0.657 atm and a temperature of 293 K is found to occupy a volume of 639 milliliters. How many moles of gas are in the sample? mol

A 65.0 g sample of copper (specific heat = 0.20 j/g degrees Celsius) is heated to 97.6 degrees Celsius and then placed in a container of water at 20 degrees Celsius. The final temperature of the water and cooper is 24.9 degrees Celsius. What is the mass of the water in the container, assuming…

Four samples were weighed using three different balances. (All are as accurate as the precision indicates.) The masses are 0.94 kg, 58.2 g, 1.55 g, and 250 mg. The total mass should be reported as:

75.0 g sample of a metal at 65 degrees is added to 100.0 g of water at 20.0 degrees Celcius. The temperature of the water rises to 22.3 degrees Celsius . calculate the specific heat of the metal, assuming that all the heat lost by the metal is gained by the water

A 1320 g block of lead initially at 35 degrees Celsius absorbs 3044 j of heat. What is the final temperature of the lead? ( The specific heat of lead is 0.16 j/g degrees Celsius.