1) How many grams of chromium would be electroplated by passing a constant current of 5.2...

1) How many grams of chromium would be electroplated by passing a constant current of 5.2 amperes through a solution containing CrCl₃ for 45.0 min?
A. 9.3 x 10^–4 g
B. 0.042 g
C. 2.5 g
D. 24 g
E. 2.3 x 10¹⁰ g

2) Which one of the following reactions must be carried out in an electrolytic cell rather than in a galvanic cell?
A. 3Ni²⁺(aq) + 2Cr(s) → 3Ni(s) + 2Cr³⁺(aq)

B. 2Ag⁺(aq) + Pb(s) → 2Ag(s) + Pb²⁺(aq)
C. Br₂(l) + 2Cu⁺(aq) → 2Br^–(aq) + Cu²⁺(aq)
D. Cr³⁺(aq) + 3Ag(s) → Cr + 3Ag⁺(aq)
E. 2Fe³⁺(aq) + Sn(s) → 2Fe²⁺(aq) + Sn²⁺(aq)

Expert Solution

queen_honey_blossom answered 2 years ago

How many grams of zinc, Zn (s) are electroplated out of a solution containing Zn2+ (aq)...

How many grams of zinc, Zn (s) are electroplated out of a solution containing Zn2+ (aq) if the solution is electrolyzed for 1 hour 22 minutes and 26 seconds at current of 1.22 amps? In an experiment similar to this one, a polished strip of Cu (s) was found to weigh 17.452 g. This strip was electrolyzed for exactly 25 minutes at an average current of 0.987 amps. The weight of the copper strip after electrolysis was 17.996 g. From...

A. The boiling point of water is 100.0°C at 1 atmosphere. How many grams of chromium(II)...

A. The boiling point of water is 100.0°C at 1 atmosphere. How many grams of chromium(II) chloride (122.9 g/mol), must be dissolved in 256.0 grams of water to raise the boiling point by 0.300°C? Refer to the table for the necessary boiling or freezing point constant. Solvent Formula Kb (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02 ____g chromium(II) chloride. B. The boiling point of water...

1- How many grams in 2.5 of CO2? 2- How many moles are in 90 grams...

1- How many grams in 2.5 of CO2? 2- How many moles are in 90 grams of C6H12O6? 3 - How many grams of hydrogen are in 2 moles C3H8 4- Identify the groups and period that each elements belongs : Silicon Barium Element number 21 Iodine 5 - What is the maximum electron number that can be contained in following: A 2s orbital The 3p subshell The third shell A 4d orbital 6 - How many valence electrons are...

1)How many moles of Sr are there in 93.2 grams of Sr? 2)How many grams of...

1)How many moles of Sr are there in 93.2 grams of Sr? 2)How many grams of Ag are there in 0.692 moles of Ag? 3)How many grams of Ga are there in a sample of Ga that contains the same number of moles as a 39.1 gram sample of Mg? grams of Ga

1) How many atoms of aluminum would be found in 100 grams of aluminum? 2) How...

1) How many atoms of aluminum would be found in 100 grams of aluminum? 2) How many grams are in 66.8 liters of Br2 ?

1) A) How many grams of C10H18 would you need to measure out to have 0.8...

1) A) How many grams of C10H18 would you need to measure out to have 0.8 mol? Give your answer to 2 decimal spaces. B) How many mol of C9H18 would you have if you have 86.71 grams? Give your answer to 2 decimal spaces

Making a buffer soln with K2HPO4 and KH2PO4? 1. How many grams of acid would I...

Making a buffer soln with K2HPO4 and KH2PO4? 1. How many grams of acid would I need to make .08M soln in 100ml? And how many grams of base would I need to make a .05M soln in 100ml? 2. What is the theoretical buffer pH? What is the theroetical buffer pH after lmL of .1M NaOH is added?

How many grams of NaH2PO4 and how many grams of Na2HPO4 are needed to prepare 2.0...

How many grams of NaH2PO4 and how many grams of Na2HPO4 are needed to prepare 2.0 L of 1.50 M “phosphate buffer” with a pH of about 8.00. You are given: For salt form of a weak acid NaH2PO4 or weak acid H2PO4-, pKa = 7.21 and Ka = 6.2 x 10-8 1 mol Na2HPO4 = 142 g Na2HPO4 1 mol NaH2PO4 = 120 g NaH2PO4 Select one: a. Mass of NaH2PO4: 35.5 g and Mass of Na2HPO4: 276.1 g...

How many grams of each product result from the following reactions, AND how many grams of...

How many grams of each product result from the following reactions, AND how many grams of each reactant is left over? (Shntould be three amounts left over for each equation) 1) ( 1.3 g NaCl)+( 3.2 g AgNO3)→(xgAgCl)+(ygNaNO3) 2) ( 2.63 g BaCl2)+( 6.76 g H2SO4)→(xgBaSO4)+(ygH

1. How many GRAMS of nitrogen are present in 3.97 moles of dinitrogen tetrafluoride ? grams....

1. How many GRAMS of nitrogen are present in 3.97 moles of dinitrogen tetrafluoride ? grams. 2. How many MOLES of fluorine are present in 2.72 grams of dinitrogen tetrafluoride ? moles.

Question