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3 years ago

Given the two half-cell reactions for copper and iron below

Chemistry

1 answer:

liraira [26]3 years ago

6 0

Answer:

No, i will not use a water pipe consisting of the two metals

Explanation:

Looking at the reduction potential of the both metals, it is clear that an electrochemical cell is set up with iron as the anode and copper as the cathode.

This will make the iron to quickly corrode and eventually destroy the water pipe. It is better to have a set up in which another metal that is higher than iron in the electrochemical series is combined with it.

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a 150 g sample of water (initially at 45 C) is mixed with an unknown mass of water (initially at 84 C). the final temperature of

Evgesh-ka [11]

Answer : The unknown mass of water is, 200.3 grams.

Explanation :

In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.

$q_1=-q_2$

$m_1\times c_1\times (T_f-T_1)=-m_2\times c_2\times (T_f-T_2)$

As,

$c_1=c_2$ = specific heat water

So,

$m_1\times (T_f-T_1)=-m_2\times (T_f-T_2)$

where,

$m_1$ = mass of water = 150 g

$m_2$ = mass of unknown water = ?

$T_f$ = final temperature of mixture = $67.3^oC$

$T_1$ = initial temperature of water = $45^oC$

$T_2$ = initial temperature of unknown water = $84^oC$

Now put all the given values in the above formula, we get

$150g\times (67.3-45)^oC=-m_2\times (67.3-84)^oC$

$m_2=200.3g$

Therefore, the unknown mass of water is, 200.3 grams.

3 0

4 years ago

Which has the greater number of particles, 1 mole br2 or 80g br2?

KengaRu [80]

They have the same amount of particles.

If you convert 80g to moles, you will find that 80g of diatomic bromine is 1 mole.

3 0

4 years ago

Difference between hard water and cold water ?

sweet-ann [11.9K]

The hardness of water is determined primarily by the amount of calcium and magnesium it contains. ... Instead of having higher levels of calcium and magnesium, soft water tends to have higher concentrations of sodium, or salt.

6 0

3 years ago

What is the organic product formed when ethanoic acid reacts with ethanol?

Nutka1998 [239]

Answer:

Ethyl ethanoate is formed

5 0

3 years ago

A circle has a radius of 5 feet and a central angle AOB that measures 10°. What is the length of the intercepted arc AB? Use 3.1

algol [13]

We are asked to solve for the arc length of the intercepted arc and the formula is shown below:
Arc length = 2*pi*r(central angle/360°)
r = 5 feet
central angle = 10°

Solving for the arc length, we have:
Arc length = 2*3.14*5 (10/360)
Arc length = 0.872 feet

The arc length is 0.872 feet.

5 0

3 years ago