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Ray Of Light [21]
3 years ago
12

I will give brainliest!!! 8th grade

Chemistry
1 answer:
Stella [2.4K]3 years ago
7 0

Answer:

The distance between the sun and northern and southern hemisphere causes opposite seasons.

I'm not sure if this is correct

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Which of the following is NOT a cause of Earth's internal heat?
miskamm [114]

Answer:

I think it A good luck this thing is making me write 20 letters so I can give you the answer byeee

7 0
3 years ago
The sample concentration was measured at 50mg/ml. The loading concentration needs to be 10mg/ml. The final volume needs to be 25
Svet_ta [14]

Answer:

a)  V_1=5ul

b)  v=20ul

Explanation:

From the question we are told that:

initial Concentration C_1=50mg/ml

Final Concentration C_2=10mg/ml

Final volume needs V_2 =25ul

Generally the equation for Volume is mathematically given by

C_1V_1=C_2V_2

V_1=\frac{C_1V_1}{C_2}

V_1=\frac{10*25}{50}

V_1=5ul

Therefore

The volume of buffer needed is

v=V_2-V_1\\\\v=25-5

v=20ul

3 0
3 years ago
How many atoms are in the 3.5 moles of arsenic atoms?
Dmitry_Shevchenko [17]
Number of atom in one mole = 6.022 × 10²³
So, in 3.5 moles, it would be: = 6.022 × 10²³ * 3.5 = 2.1 × 10²⁴

In short, Your Answer would be 2.1 × 10²⁴ atoms

Hope this helps!
6 0
3 years ago
Read 2 more answers
List out the moles for each element in the following compound ZnBr2
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Answer:

If the colors in a chromatography are able to dissolve and travel up a paper wick, what kind of chemical property do the colors have when mixed with rubbing alcohol?

(You may need to search "Chemical Properties")

4 0
2 years ago
What is a chemical bond?
antoniya [11.8K]
The answer is A. when electrons are shared between atoms
7 0
3 years ago
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