isotopes have the same number of protons nut different number of neutrons. the difference in thr mumber of neutrons give them their uniques properties.

6 0

3 years ago

Be sure to answer all parts. calculate δg ocell for the reaction between cr(s) and cu2+(aq). e ocell = 1.08 j/c. enter your answ

Mademuasel [1]

Answer:

$\boxed{-6.29 \times10^{5}\text{ J}}$

Explanation:

Step 1. Determine the cell potential

2×[Cr ⟶ Cr³⁺ + 3e⁻] 0.744 V

2Cr + 3Cu²⁺ ⟶ 3Cu + 2Cr³⁺ 1.086 V

Step 2. Calculate ΔG°

$\Delta G^{\circ} = -nFE_{\text{cell}}^{^{\circ}} = -6 \times 96 485 \times 1.086 = \text{-629 000 J}\\\\= \boxed{-6.29 \times10^{5}\text{ J}}$

6 0

3 years ago

If a solution has a [H+] of 9.3x10-11, what is the pH?

Rina8888 [55]

Answer:

Explanation:

The pH of a solution can be found by using the formula

$pH = - log [ {H}^{+} ]$

From the question we have

$ph = - log(9.3 \times {10}^{ - 11} ) \\ = 10.0315...$

We have the final answer as

Hope this helps you

4 0

3 years ago