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MAVERICK [17]
3 years ago
6

The two electrodes cr(s)/cr3+(aq) and fe(s)/fe2+(aq) are combined to afford a spontaneous electrochemical reaction. the standard

reduction potentials in v for cr3+(aq) and fe2+(aq) are −0.74 and −0.44, respectively. e° for the cell (in v) is
Chemistry
1 answer:
11Alexandr11 [23.1K]3 years ago
3 0

E = Ecathod- Eanode = -0.44 +0.74 =

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A scuba diver goes deeper underwater the diver must be aware that the increased pressure affects the human body be increasing th
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Answer:

The amount of dissolved gases in the body. Have a good day! =)

Explanation:

3 0
3 years ago
An experiment reveals that 125.0 grams of an unknown metal increases in temperature from 22.0 oC to 43.6 oC upon absorbing 640 j
nydimaria [60]

Answer:

                     Cp  =  0.237 J.g⁻¹.°C⁻¹

Explanation:

                      Amount of energy required by known amount of a substance to raise its temperature by one degree is called specific heat capacity.

The equation used for this problem is as follow,

                                                 Q  =  m Cp ΔT   ----- (1)

Where;

           Q  =  Heat  =  640 J

           m  =  mass  =  125 g

           Cp  =  Specific Heat Capacity  =  <u>??</u>

           ΔT  =  Change in Temperature  =  43.6 °C  -  22 °C  =  21.6 °C

Solving eq. 1 for Cp,

                                Cp  =  Q / m ΔT

Putting values,

                                Cp  =  640 J / (125 g × 21.6 °C)

                                Cp  =  0.237 J.g⁻¹.°C⁻¹

3 0
3 years ago
Which equations are in standard form? Check all that apply
aliya0001 [1]

Answer:

2x+3y=-6

4x+3y=12

3x-y=5

5x+3y=1

Explanation:

standard form: ax + by = C

4 0
3 years ago
Most substances become less dense as the temperature increases. Which substance is an exception to this rule
stealth61 [152]
The substance is water
6 0
4 years ago
Read 2 more answers
What is the density of a block marble that occupies 255 cm^3 and has a mass of 1000g
RUDIKE [14]

Answer:

<h2>3.92 g/cm³</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question we have

density =  \frac{1000}{255}  \\  = 3.921568...

We have the final answer as

<h3>3.92 g/cm³</h3>

Hope this helps you

4 0
3 years ago
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