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3 years ago

What are the coefficients needed to balance this chemical reaction to show that matter is conserved? fe + cl2 → fecl3

SAT

1 answer:

motikmotik3 years ago

5 0

Let a, b, and c be the coefficients in the balanced reaction:

a Fe + b Cl₂ → c FeCl₃

Count the atoms that show up among the reactants and products. They should be equal on both sides:

Fe : a = c

Cl : 2b = 3c

Let c = 2. Then a = 2 and 2b = 6, so b = 3.

Then the balanced reaction is

2 Fe + 3 Cl₂ → 2 FeCl₃

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Find the residual values, and use the graphing calculator tool to make a residual plot.

finlep [7]

Answer:

No, the points are evenly distributed about the x-axis.

Explanation:

1. Write the table with the data:

x given predicted residual

1 - 3.5 - 1.1

2 - 2.9 2

3 - 1.1 5.1

4 2.2 8.2

5 3.4 1.3

2. Complete the column of residuals

The residual is the observed (given) value - the predicted value.

residual = given - predicted.

Thus, the complete table, with the residual values are:

x given predicted residual

1 - 3.5 - 1.1 - 2.4

2 - 2.9 2 - 4.9

3 - 1.1 5.1 - 6.2

4 2.2 8.2 - 6.0

5 3.4 1.3 2.1

3. Residual plot

You must plot the last column:

x residual

1 - 2.4

2 - 4.9

3 - 6.2

4 - 6.0

5 2.1

See the plot attached.

Does the residual plot show that the line of best fit is appropriate for the data?

Ideally, a residual plot for a line of best fit that is appropiate for the data must not show any pattern; the points should be randomly distributed about the x-axis.

But the points of the plot are not randomly distributed about the x-axis: there are 4 points below the x-axis and 1 point over the x-axis: there are more negative residuals than positive residuals. This is a pattern. Also, you could say that they show a curve pattern, which drives to the same conclusion: the residual plot shows that the line of best fit is not appropiate for the data.

Thus, the conclusion should be: No, the points have a pattern.

1. "Yes, the points have no pattern": false, because as shown, the points do have a pattern, which makes the residual plots does not show that the line of best fit is appropiate for the data.

2. "No, the points are evenly distributed about the x-axis": true. As already said the points have a pattern. It is a curved pattern, and this shows the line of best fit is not appropiate for the data.

3. "No, the points are in a linear pattern": false. The points are not in a linear pattern.

4. "Yes, the points are in a curved pattern": false. Because the points are in a curved pattern, the residual plot shows that the line of best fit is not appropiate for the data.

3 0

4 years ago

Read 2 more answers

The United States uses which source of energy to produce almost 40 percent of its

Amiraneli [1.4K]

It should be coal energy

5 0

4 years ago

How was the quran compiled

Flura [38]

Answer:

According to Islamic tradition, the Qur'an was first compiled into a book format by Ali ibn Abi Talib.

Explanation:

6 0

3 years ago

What is likely negative affect on the earth extra carbon dioxide is added to our atmosphere

konstantin123 [22]

Answer:

It will change weather patterns and destroy ecosystems.

Explanation:

Carbon dioxide, while not being the most power, is the most common greenhouse gas. A greenhouse gas helps to trap longwave radiation from leaving the Earth’s atmosphere and is enhancing global warming. We say enhanced global warming due to the Earth warming through natural reasons too. Several changes occur due to this temperature increase. Sea ice melting causes freshwater to enter the sea. An increase in sea levels can cause coastal flooding, increased erosion and a higher frequency and power of storms. Water density is linked to salinity. By introducing more freshwater the salinity decreases in the north and south of the Earth. If the oceanic currents change this will cause the weather to become more extreme during seasonal changes in many regions around the world. While humans can adapt their living conditions to suit the climate, many animals and plants can not. Therefore, enhanced global warming will cause the loss of many ecosystems around the world, including coral reefs.

8 0

3 years ago

At t=0 a ball, initially at rest, starts to roll down a ramp with constant acceleration. You notice it moves 1 foot between t=0

romanna [79]

Answer:

N/A

Explanation:

Need more context. Question is incomplete

7 0

3 years ago