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Mariulka [41]
3 years ago
14

Which TWO scientist proposed an atomic model with a nucleus.

Chemistry
1 answer:
Zina [86]3 years ago
7 0

Answer:

A. Rutherford and Bohr

Explanation:

I think this is right but I am not sure it has been a while since i read about them

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All cells _____.
xeze [42]
The answer is the fourth choice, or Have membrane-bound organelles. Hope this helps you!

Please mark as Brainliest if this was correct!


-Belle
7 0
3 years ago
If 17. 6 g of hcl are used to produce a 14. 5 l solution, what is the ph of the solution?.
kati45 [8]

This problem is providing us with the mass of hydrochloric acid and the volume of solution and asks for the pH of the resulting solution, which turns out to be 1.477.

<h3>pH calculations</h3>

In chemistry, one can calculate the pH of a solution by firstly obtaining its molarity as the division of the moles of solute by the liters of solution, so in this case for HCl we have:

M=\frac{17.6g*\frac{1mol}{36.46g} }{14.5L} \\\\M=0.0333 M

Next, due to the fact that hydrochloric acid is a strong acid, we realize its concentration is nearly the same to the released hydrogen ions to the solution upon ionization. Thereby, the resulting pH is:

pH=-log(0.0333)\\\\pH=1.477

Which conserves as much decimals as significant figures in the molarity.

Learn more about pH calculations: brainly.com/question/1195974

3 0
2 years ago
How many atoms are in 0.500mol of calcium?
creativ13 [48]

Answer:

3.01×10²³ atoms of calcium

Explanation:

number of moles = number of atoms/Avogadro's constant

n = N/NA

N = n×NA = 0.500 mol×6.02×10²³ mol^-1

N = 3.01×10²³ atoms of calcium

3 0
3 years ago
Which is always the first step in dealing with an accident in the lab?
marin [14]
The answer is the letter C
3 0
3 years ago
Read 2 more answers
I am a teacher in a college in a large city in China. One day, some students asked me to join
IrinaVladis [17]

Answer:

c or b

Explanation:

the story is entertaining and it shares the teachers personal experiences with the teachers students

8 0
2 years ago
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