1. How many anions are there in 2.50 g of MgBr2? 2. What is the mass...
1. How many anions are there in 2.50 g of MgBr2?
2. What is the mass of 0.500 mol of dichlorodifluoromethane, CCl2F2?
Homework Answers
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1. How many anions are there in 2.50 g of MgBr2?
2. What is the mass...
1. How many moles are contained in 2.50 grams of benzoic acid? Molar mass of benzoic...
1. How many moles are contained in 2.50 grams of benzoic acid? Molar mass of benzoic acid: 122.12 g/mol 2. How many mL are in 0.5 grams of cyclohexene? Density of cyclohexene is 0.809 g/ml 3. How many moles are in 250 mL of 2 M sodium hydroxide? 4. If 5.0 mL of 2-methyl-2-butanol are allowed to react with an excess of concentrated hydrochloric acid, what is the maximum mass of 2-chloro-2-methylbutane that can be obtained? 5. An acid-catalyzed dehydration...
6. 48.6 mL of a 0.100 M NaOH solution is needed to react with 20.0 mL...
6. 48.6 mL of a 0.100 M NaOH solution is needed to react with 20.0 mL of an unknown concentration of HCl solution. What is the concentration of the HCl solution? 7. A colorless liquid has a composition of 84.1% carbon and 15.9% hydrogen by mass. Determine the empirical formula. Also, assuming the molar mass of this compound is 114.2 g/mol, determine the molecular formula of this compound. 8. What is the concentration of HCl in the final solution when...
Copper(t) bromide reacts with magnesium metal: 2 CuBr + Mg + 2 Cu + MgBr2 If...
Copper(t) bromide reacts with magnesium metal: 2 CuBr + Mg + 2 Cu + MgBr2 If 0.253 moles of magnesium react in this way, a. How many grams of CuBr are consumed? (1 point) . 143.45 g/mol 0,50cmol x 143.45 g/mol 0.295 mol cu Br x2-0.50 mo = 72.58 grams b. How many grams of Cu can be produced? (1 point), 2x 0.253 moly. 63.596 g/mol = 3 Zoltaron
how many mmoles of oxalate, C2O4^2- ? Mass of sample - What was the initial mass...
how many mmoles of oxalate, C2O4^2- ?
Mass of sample - What was the initial mass of the weighing paper in Trial #1? 0.2000 g Previous Answers ✓ Correct Part B Mass of sample - What was the final mass of the weighing paper and sample in Trial #12 0.3000 g Previous Answers ✓ Correct Part C Mass of sample - What is the mass of the sample in Trial #12 0 1100 g We were unable to transcribe this...
How many moles of glucose are present in 50.0 grams of solution that is 2.50% by...
How many moles of glucose are present in 50.0 grams of solution that is 2.50% by mass glucose (C6H1206)? Molar mass of C6H1206 = 180.16 g/mol a. 11.1 moles 6.225 moles 6.6.94 x 10-3 moles d. 1.25 moles e. 0.800 moles
How many copper (Cu) atoms are in 2.04 moles of copper? What is the mass of...
How many copper (Cu) atoms are in 2.04 moles of copper? What is the mass of 0.500 mol of manganese (Mn)?
You want to make 850.0 mL of a 2.0 M solution of MgBr2. a. How many...
You want to make 850.0 mL of a 2.0 M solution of MgBr2. a. How many g of MgBrą would be needed? b. How many mL of a 9.5 M stock solution would be needed?
14. A hummingbird of mass 2.50 g consumes 65.0 ml of O, (at 27°C and 1...
14. A hummingbird of mass 2.50 g consumes 65.0 ml of O, (at 27°C and 1 atm) per hour of flight. According to the unbalanced chemical equation: C6H12O6 (aq.) + O2(g) – CO2(g) + H2O(g) + AH a. How many mL of oxygen will the hummingbird need to gather to complete a five hour flight? Answer (enclose work) b. If glucose supplies all the needed energy, what is the minimum mass of glucose that the hummingbird must gather from plants...
1- Determine the number of moles of oxygen atoms in 2.15 mol CO2. 2- How many H...
1- Determine the number of moles of oxygen atoms in 2.15 mol CO2. 2- How many H atoms are present in 35.2g of CH2Br2. 3- Calculate the empirical formula of the natural flavor responsible for the taste and smell of vanilla, knowing the elemental mass percent composition: C 63.15% , H 5.30%, O 31.55%. Write the formula in the form CxHyOz. 4- Calculate the number of moles in 72.5 g of N02. 5- Calculate the mass of 15.7 mol of HNO3. 6-...
21 A and B. 21. A solution was made by dissolving 1.63 g MgBr2 in enough...
21 A and B.
21. A solution was made by dissolving 1.63 g MgBr2 in enough water to give 50.0 mL of solution. Then, 10.0 mL of this solution were transferred to another flask and diluted to a volume of 75.0 mL. a. What is the molarity of this final solution? va: 75.0ML V(= 50.0mL 1.639 mg By i mols 1 184.119 mg 1 X 24. 31 Br: 2x 179.904 159.808 184.118 :8.858 103 mois TRIM OSL b. How many...
6. 48.6 mL of a 0.100 M NaOH solution is needed to react with 20.0 mL of an unknown concentration of HCl solution. What is the concentration of the HCl solution? 7. A colorless liquid has a composition of 84.1% carbon and 15.9% hydrogen by mass. Determine the empirical formula. Also, assuming the molar mass of this compound is 114.2 g/mol, determine the molecular formula of this compound. 8. What is the concentration of HCl in the final solution when...
Copper(t) bromide reacts with magnesium metal: 2 CuBr + Mg + 2 Cu + MgBr2 If 0.253 moles of magnesium react in this way, a. How many grams of CuBr are consumed? (1 point) . 143.45 g/mol 0,50cmol x 143.45 g/mol 0.295 mol cu Br x2-0.50 mo = 72.58 grams b. How many grams of Cu can be produced? (1 point), 2x 0.253 moly. 63.596 g/mol = 3 Zoltaron
how many mmoles of oxalate, C2O4^2- ?
Mass of sample - What was the initial mass of the weighing paper in Trial #1? 0.2000 g Previous Answers ✓ Correct Part B Mass of sample - What was the final mass of the weighing paper and sample in Trial #12 0.3000 g Previous Answers ✓ Correct Part C Mass of sample - What is the mass of the sample in Trial #12 0 1100 g We were unable to transcribe this...
How many moles of glucose are present in 50.0 grams of solution that is 2.50% by mass glucose (C6H1206)? Molar mass of C6H1206 = 180.16 g/mol a. 11.1 moles 6.225 moles 6.6.94 x 10-3 moles d. 1.25 moles e. 0.800 moles
You want to make 850.0 mL of a 2.0 M solution of MgBr2. a. How many g of MgBrą would be needed? b. How many mL of a 9.5 M stock solution would be needed?
14. A hummingbird of mass 2.50 g consumes 65.0 ml of O, (at 27°C and 1 atm) per hour of flight. According to the unbalanced chemical equation: C6H12O6 (aq.) + O2(g) – CO2(g) + H2O(g) + AH a. How many mL of oxygen will the hummingbird need to gather to complete a five hour flight? Answer (enclose work) b. If glucose supplies all the needed energy, what is the minimum mass of glucose that the hummingbird must gather from plants...
21 A and B.
21. A solution was made by dissolving 1.63 g MgBr2 in enough water to give 50.0 mL of solution. Then, 10.0 mL of this solution were transferred to another flask and diluted to a volume of 75.0 mL. a. What is the molarity of this final solution? va: 75.0ML V(= 50.0mL 1.639 mg By i mols 1 184.119 mg 1 X 24. 31 Br: 2x 179.904 159.808 184.118 :8.858 103 mois TRIM OSL b. How many...
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