Chemistry concepts and calculations
117302 questions • Page 155 / 2347
1. What volume of 0.240M H2SO4 is needed to react with 42.0mL of 0.120M NaOH? Th
1. What volume of 0.240M H2SO4 is needed to react with 42.0mL of 0.120M NaOH? The equation is H2SO4(aq)+2NaOH(aq)?Na2SO4(aq)+2H2O(l) 2. What is the molarity of an HNO3 solution if…
1. What volume of H 2 gas (in liters), measured at 27°C and 670. torr, can be ob
1. What volume of H2 gas (in liters), measured at 27°C and 670. torr, can be obtained by reacting 5.00 g of zinc metal with 189 mL of 0.224 M HCl? The equation is 2. Determine how…
1. What volume of ethanol (D 0.789 g/mL) will have the same mass as 56.85 mL of
1. What volume of ethanol (D 0.789 g/mL) will have the same mass as 56.85 mL of aluminum (D -2.70 g/mL)? 2. A sample of copper has a mass of 100.0 g with a specific heat of 0.385 …
1. What volume of water vapor is produced by burning500g of gasoline at STP and
1. What volume of water vapor is produced by burning500g of gasoline at STP and a temp of 18 degreeC. 2. Determine the density of propanegasC3H8, in grams per liter at 22 degreeC …
1. What was the purpose of the 25% K2CO3 (aq. soln) washing step? Which non-desi
1. What was the purpose of the 25% K2CO3 (aq. soln) washing step? Which non-desired compound(s) did this step remove during the aqueous workup? Was this aqueous wash layer on the …
1. What will be the contents of BX after the following instructions execute? mov
1. What will be the contents of BX after the following instructions execute? mov bx,5 stc mov ax,60h adc bx,ax 2. Describe the output when the following code executes in 64-bit mo…
1. What will be the energy of light whose wavelength is 575 nm? 2. What will be
1. What will be the energy of light whose wavelength is 575 nm? 2. What will be the frequency of a photon whose energy is 3.8 10? 3. Using Bohr's equation for the energy levels of…
1. What will be the energy of light whose wavelength is 575 nm? 2. What will be
1. What will be the energy of light whose wavelength is 575 nm? 2. What will be the frequency of a photon whose energy is 3.8 1018 1? 3. Using Bohr's equation for the energy level…
1. What would be a good hypothesis for this lab? 2. Why do you think the tempera
1. What would be a good hypothesis for this lab? 2. Why do you think the temperature of the reaction increased as the reaction proceeded? Here is my Lab and the results: Oxidation…
1. What would be the concentration of A at equilibrium if the following reaction
1. What would be the concentration of A at equilibrium if the following reaction starts with 0.120M of A? 2A(aq) <==> B(aq) + C(aq) Kc=0.088 2.A solution of calcium hydroxid…
1. What would be the pH if 10 -2 moles of sulfuric acid (H 2 SO 4 ) were added t
1. What would be the pH if 10-2 moles of sulfuric acid (H2SO4) were added to 1 L of water. Sulfuric acid is a strong acid. 2. At a wastewater treatment plant, FeCl3(s) is added to…
1. What would be the result if too much solvent were used in isolating and recry
1. What would be the result if too much solvent were used in isolating and recrystallizing aspirin? a. The solid obtained would not be of high purity. b. Less solid would be ob…
1. What would happen if a metal spatula were allowed to contact the acid solutio
1. What would happen if a metal spatula were allowed to contact the acid solution in part 4 of this experiment? 2· It is not unusual for students to end up with greater than 100% …
1. What would the end point be for a titration of 25.00 mL of0.25 M NaOH with 0.
1. What would the end point be for a titration of 25.00 mL of0.25 M NaOH with 0.10 M HCl? 2. What would the pH be at the end point for thistitration? So, I started by finding the …
1. What would you expect the IR to show? 2. Can IR be used to distinguish starti
1. What would you expect the IR to show? 2. Can IR be used to distinguish starting material and product? Why? 3. What are some other possible products? 4. How would you distinguis…
1. What would you multiply \"atoms of Bromine\" by to get the units \"moles of B
1. What would you multiply "atoms of Bromine" by to get the units "moles of Bromine"? moles Br × = atoms Br (number) (unit) (number) (unit) 2. What would you multiply "atoms of…
1. What would you multiply \"atoms of Bromine\" by to get the units \"moles of B
1. What would you multiply "atoms of Bromine" by to get the units "moles of Bromine"? moles Br × = atoms Br (number) (unit) (number) (unit) 2. What would you multiply "atoms of…
1. Whatis ls -1? Explain. 2. Whatis Is -F? Explain. 3. What doesls-A andls-amean
1. Whatis ls -1? Explain. 2. Whatis Is -F? Explain. 3. What doesls-A andls-amean and display? 4. What doesls-Cmeanand display? 5. What doesls-fmeanand display? 6. What doesls-Fmea…
1. Whats wrong with the following statement, and why? (char c[10] = I am a stude
1. Whats wrong with the following statement, and why? (char c[10] = I am a student; 2. What value will the following program output? Explain in steps. #include<stdio.h> int …
1. When 0.014 mol of a weak acid HA is dissolved in enough water to make 1.0 L o
1. When 0.014 mol of a weak acid HA is dissolved in enough water to make 1.0 L of solution, [H+] is 1.8x10-3 M. Calculate the freezing point of this solution. Assume that the mola…
1. When 0.014 mol of a weak acid HA is dissolved in enough water to make 1.0 L o
1. When 0.014 mol of a weak acid HA is dissolved in enough water to make 1.0 L of solution, [H+] is 1.8x10-3 M. Calculate the freezing point of this solution. Assume that the mola…
1. When 0.014 mol of a weak acid HA is dissolved in enough water to make 1.0 L o
1. When 0.014 mol of a weak acid HA is dissolved in enough water to make 1.0 L of solution, [H+] is 1.8x10-3 M. Calculate the freezing point of this solution. Assume that the mola…
1. When 0.014 mol of a weak acid HA is dissolved in enough water to make 1.0 L o
1. When 0.014 mol of a weak acid HA is dissolved in enough water to make 1.0 L of solution, [H+] is 1.8x10-3 M. Calculate the freezing point of this solution. Assume that the mola…
1. When 0.75 g of hydrazine, NJ?H, decomposes, the mass of hydrogen produced sho
1. When 0.75 g of hydrazine, NJ?H, decomposes, the mass of hydrogen produced should be,L (A) equal to 0.75 g because mass is conserved. (B) equal to twice the mass of the nitrogen…
1. When 1 mole of H 2 (g) reacts with Cl 2 (g) to form HCl(g) according to the f
1. When 1 mole of H2(g) reacts with Cl2(g) to form HCl(g) according to the following equation, 185 kJ of energy are evolved. Is this reaction endothermic or exothermic? _________ …
1. When 1.00 g of the limiting reagent cyclohexanol (FW -100 g/mol) is converted
1. When 1.00 g of the limiting reagent cyclohexanol (FW -100 g/mol) is converted to give 0.710 g of purified cyclohexyl acetate (FW = 142 g/mol), the percent yield is: OH H cataly…
1. When 1.550 g of liquid hexane (C6H14) undergoes combustion in a bomb calorime
1. When 1.550 g of liquid hexane (C6H14) undergoes combustion in a bomb calorimeter, the temperature rises from 25.87C to 38.13C. Find Erxn for the reaction in kJ/mol hexane. The …
1. When 14.01 mL. of HCl of unknown concentration (but less than that of the bas
1. When 14.01 mL. of HCl of unknown concentration (but less than that of the base) are reacted with 15 mL. of 3.068 M NaOH, 1.56 kJ of heat are released. What is the molarity of t…
1. When 14.01 mL. of HCl of unknown concentration (but less than that of the bas
1. When 14.01 mL. of HCl of unknown concentration (but less than that of the base) are reacted with 15 mL. of 3.068 M NaOH, 1.56 kJ of heat are released. What is the molarity of t…
1. When 14.05 mL of Hal of unknown concentration (but less than that of the base
1. When 14.05 mL of Hal of unknown concentration (but less than that of the base)? Are reacted with 15mL of 3.005 M NaOH, 1.86 kj of heat are released. What is the molarity of the…
1. When 15.00g of NH3 reacts with excess ClF3, the heat of the reaction is measu
1. When 15.00g of NH3 reacts with excess ClF3, the heat of the reaction is measured to be -24.8 kJ. What is the ?Hrxn for: 2 ClF3 + 2 NH3 ? N2 + 6 HF + Cl2? (1) -3.31 kJ (2) -4.96…
1. When 2 moles of CO(g) react with O 2 (g) to form CO 2 (g) according to the fo
1. When 2 moles of CO(g) react with O2(g) to form CO2(g) according to the following equation, 566 kJ of energy are …
1. When 2 moles of CO(g) react with O 2 (g) to form CO 2 (g) according to the fo
1. When 2 moles of CO(g) react with O2(g) to form CO2(g) according to the following equation, 566 kJ of energy are …
1. When 2 moles of CO(g) react with O 2 (g) to form CO 2 (g) according to the fo
1. When 2 moles of CO(g) react with O2(g) to form CO2(g) according to the following equation, 566 kJ of energy are …
1. When 2 moles of CO(g) react with O 2 (g) to form CO 2 (g) according to the fo
1. When 2 moles of CO(g) react with O2(g) to form CO2(g) according to the following equation, 566 kJ of energy are …
1. When 50.0 mL of 0.50 M formic acid is titrated with 0.50 M sodium hydroxide,
1. When 50.0 mL of 0.50 M formic acid is titrated with 0.50 M sodium hydroxide, calculate the pH for each of the following: Ka of formic acid = 1.8 x 10^-4 Be sure to account for …
1. When 90 grams of water is evaporated, how many atoms of hydrogen was lost? 2.
1. When 90 grams of water is evaporated, how many atoms of hydrogen was lost? 2. How many picoliters of water are in 3.32 mol of water? 3. How many centiliters of sulfuric acid ar…
1. When C 2 H 4 (g) reacts with H 2 O(g) to form CH 3 CH 2 OH(g) , 45.6 kJ of en
1. When C2H4(g) reacts with H2O(g) to form CH3CH2OH(g) , 45.6 kJ of energy are evolved for each mole of C2H4(g) that reacts. Write a balanced thermochemical equation for the react…
1. When CO(g) reacts with O 2 (g) to form CO 2 (g) , 283 kJ of energy are evolve
1. When CO(g) reacts with O2(g) to form CO2(g) , …
1. When NO2 is bubbled into water, it is completely converted to HNO3 and HNO2 a
1. When NO2 is bubbled into water, it is completely converted to HNO3 and HNO2 according to the reaction shown below. Calculate the pH and the molar concentrations of all dissolve…
1. When a 2.00-g sample of KBr is dissolved in water in a calorimeter that has a
1. When a 2.00-g sample of KBr is dissolved in water in a calorimeter that has a total heat capacity of 0.7271 kJ?K-1, the temperature decreases by 0.460 K. Calculate the molar he…
1. When a ?-carotene molecule is cleaved, two molecules of vitamin A are produce
1. When a ?-carotene molecule is cleaved, two molecules of vitamin A are produced. True or False 2.A hemiacetal contains two ether functional groups. True or False 1. When a ?-car…
1. When a carboxylic acid is reacted with a strong base, the product is a A. car
1. When a carboxylic acid is reacted with a strong base, the product is a A.carboxylic acid B.carboxylatesalt c.amine D.amine salt 2.Whenan amineis reacted with a strong acid, the…
1. When a carboxylic acid is reacted with a strong base, the product is a A. car
1. When a carboxylic acid is reacted with a strong base, the product is a A.carboxylic acid B.carboxylatesalt c.amine D.amine salt 2.Whenan amineis reacted with a strong acid, the…
1. When a chemist speaks of an equilibrium, what does he or she mean? Specifical
1. When a chemist speaks of an equilibrium, what does he or she mean? Specifically, what is equal in an equilibrium? 2. A mountain river flows into a lake. The level of the lake v…
1. When a function returns a value, what declares if it is an integer, float, or
1. When a function returns a value, what declares if it is an integer, float, or char? 2. When a function is called by reference, it is determined by declaring that the calling ar…
1. When a function returns a value, what declares if it is an integer, float, or
1. When a function returns a value, what declares if it is an integer, float, or char? 2. When a function is called by reference, it is determined by declaring that the calling ar…
1. When a function returns a value, what declares if it is an integer, float, or
1. When a function returns a value, what declares if it is an integer, float, or char? 2. When a function is called by reference, it is determined by declaring that the calling ar…
1. When a glycosidic linkage is formed between two monosaccharides, each with th
1. When a glycosidic linkage is formed between two monosaccharides, each with the formula C6H12O6, the resulting disaccharide will have the formula C12H22O11. A – True B- False 2.…
1. When a nucleus absorbs a neutron, ----- a. its mass number is increased by on
1. When a nucleus absorbs a neutron, ----- a. its mass number is increased by one unit b. its atomic number is decreased by two units c. its mass number is reduced by four units d…
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