1.find a possible cathode that can be used in an electrochemical cell using a copper anode and having an E0cell value > 1.00 V.

explain how you determined a possible cathode using calulations

The safe stopping distance, d, in metres, of a Harold Dobson motorcycle on wet pavement is given by the function d s 0 0. 2 3s s 20 2 ^ h = ^ + h, where s is the speed of the motocycle in metres per second. Find the speed at which the safe stopping distance is 50 metres.

which of the following are spontaneous reactions? 

Consider the following combination of reactants.

Sn(NO3)2(aq) and Cr(NO3)2(aq)

Co(s) and HCl(aq)

Fe(NO3)2(aq) and KMnO4(aq)

CuSO4(aq) and Cd(s)

ZnCl2(aq) and Pb(s)

In an experiment to study the reactivity of Ru(s), Tl(s), Gd(s) and V(s), a student observed the reactions.

Tl(s)+Ru3+(aq)→Ru(s)+Tl3+(aq)

Tl(s)+Gd3+(aq)→ no evidence of a reaction

Ru(s)+V3+(aq)→V(s)+Ru3+(aq)

use the above information to find the answer to the question below 

another spontaneous reaction that would occur is

Select one:

V(s)+Tl3+(aq)→Tl(s)+V3+(aq)

Gd(s)+Ru3+(aq)→Ru(s)+Gd3+(aq)

Ru(s)+Tl3+(aq)→Tl(s)+Ru3+(aq)

V(s)+Gd3+(aq)→Gd(s)+V3+(aq)

question 2 

An electrochemical change occurs when a strip of nickel is immersed in an acidified solution that contains dichromate ions.

The colour change that occurs as the reaction above proceeds is:

Select one:

Green to colourless

Green to orange

Orange to green

Colourless to green

CO2(g)+2H+(aq)+2e−→HCOOH(l) Eo=−0.20V

Which of the following substances oxidizes HCOOH(l)?

Select one:

Pb2+(aq)

Pb(s)

Zn2+(aq)

Zn(s)

the energy from an alkaline battery is generated by the following equation.

Zn(s)+2MnO2(s)→ZnO(s)+Mn2O3(s)

During the operation of the alkaline battery, which of the following observations can be made?

Select one:

The amount of MnO2(s) increases as Zn(s) is reduced.

The amount of Zn(s) increases as MnO2(s) is reduced.

The amount of MnO2(s) decreases as Zn(s) is oxidized.

The amount of Zn(s) decreases as MnO2(s) is oxidized.

How do you calculate mass when given efficiency?

The charge in coulombs that a battery produces when it discharges 250 A for 15.0 s, expressed in scientific notation is a.bc x 10^d C. The values of a, b, c and d are

In an electrochemical cell, 150 C of charge is transferred in 1.5 min. The electric current is determined to be _________Answer A. 

The time to transfer 1.25 x 10³ C using a current of 7.00 A is_____ Answermin 

The time to deposit 15.0 g of silver from a silver nitrate solution using a 6.00 A current is__________ Answer__________minutes.

make sure the answers are rounded  correctly

In an experiment to study the reactivity of different substances, the following observations were made.

Tl1+(aq) + 2 V3+(aq) → Tl3+(aq) + 2 V2+(aq) no evidence of a reaction

2V3+(aq) + In1+(aq) → 2V2+(aq) + In3+(aq) spontaneous reaction

2 Rh4+(aq) + Tl1+(aq) → 2 Rh3+(aq) + Tl3+(aq) spontaneous reaction

Using the above results, construct a table of reduction half-reactions that contains four half-reactions.

Write another equation that is a spontaneous reaction 

3Cl2(g) + 6NaOH(aq) →5NaCl(aq) + NaClO3(aq) + 3H2O(l)

CO2(g) + H2O(l) → H2CO3(aq)

2 NH4Cl(aq) + Ca(OH)2(aq) →2 NH3(aq) + 2H2O(l) + CaCl2(aq)

2HNO3(aq) + 6HI(aq) →2NO(g) +3 I2(s) + 4H2O(l)

Identify which one is a redox reaction and which one is not a redox reaction. 

Which equation is an example of a disproportionation reaction?