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strojnjashka [21]
3 years ago
15

Which of the following elements has three valence electrons? (2 points)

Chemistry
1 answer:
il63 [147K]3 years ago
7 0

Answer:

Al

Explanation:

It has 3.

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Explain the difference between accuracy and precision.
valina [46]

Answer:

The difference between accuracy and precision is both precision and accuracy are two ways of how scientists think about error. However, accuracy refers to or meaning to how close a measurement is to the true or accepted value. On the other hand, precision refers to or meaning to how close measurements of the same item are to each othe .... But scientists use the best quality of scientific observations and are both accurate and precise.

7 0
3 years ago
If an ocean current is moving northward from Antarctica and up the coast of Africa, the climate of the coastal land would be....
Illusion [34]

Answer:

I would say a cooled

Explanation:

because yeah it's going to be cold when it travels from Antarctica but then it's going on towards Africa and yeah the water is going to get warmth but it's going to cool the land of Antarctica because it's so dry and hot and humid but the water is going to be more warmed because Antarctica the water is freezing so you're trying to ask the temperature of the water it'd be more warm if you're trying to ask kind of like the temperature of the land it would be cooled

8 0
3 years ago
Why does styrofoam fall slower than a rock
mina [271]

Answer:

The foam board has a larger gravitational force but it also has a very large air resistance force. The net (total) force on the foam board will give it a smaller acceleration than paper.

Explanation:

The air molecules get knocked away and take some of the kinetic energy away from the object, which makes the object slow down

4 0
3 years ago
Which part of the water cycle creates a cooling effect for the earth?
pychu [463]
Troposphere is the answer
6 0
3 years ago
The pOH of a solution is 9.21. Calculate the hydrogen ion concentration of the solution. Be sure to report your answer to the co
11Alexandr11 [23.1K]

Answer:

[OH-] = 6.17 *10^-10

Explanation:

Step 1: Data given

pOH = 9.21

Step 2: Calculate [OH-]

pOH = -log [OH-] = 9.21

[OH-] = 10^-9.21

[OH-] = 6.17 *10^-10

Step 3: Check if it's correct

pOH + pH = 14

[H+]*[OH-] = 10^-14

pH = 14 - 9.21 = 4.79

[H+] = 10^-4.79

[H+] = 1.62 *10^-5

6.17 * 10^-10 * 1.62 * 10^-5 = 1* 10^-14

3 0
3 years ago
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