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ra1l [238]
3 years ago
7

Chemistry Question!! Please help, I'm stupid...

Chemistry
1 answer:
zlopas [31]3 years ago
4 0
First, let's calculate the concentration by gram per liter:
C = \frac{19.3}{0.25} = 77.2 g/L

Now, let's convert it to molarity, knowing that the molar mass of sodium chloride is 58.5g/mol:
Molarity = \frac{77.2}{58.5} = 1.31 M

For more explanation:
molarity = \frac{gram}{Liter} * \frac{Mol}{gram} = \frac{mol}{Liter}
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ladessa [460]

Answer: you are correct REEE KID  :^)

Explanation:

3 0
4 years ago
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How did atomic theory develop and change?
Agata [3.3K]
The atomic theory started with Democritus, who stated that all space was made up of indivisible particles called atoms, though Aristotles refuted that statement by saying that matter didn’t exist, he believed in the four elements: air, fire, water, and earth. Then came Dalton, who revived Democritus’s ideas and proposed the law of multiple proportions, he revived the idea that all space was made of atoms. Soon after, J.J Thompson discovered the electron by using cathode rays. Max Planck developed the quantum theory by stating that electromagnetic radiation could only be emitted in quantized form (later called quanta). Einstein furthered this idea with studies of light. Robert Millikan eventually measured the charge of a single electron. Ernest Rutherford used a gold foil experiment and discovered the nuclei, considering his alpha particles were deflected by some object. Niels Bohr made the atomic model with electrons spinning around an atom’s nucleus, Erwin Schrodinger describes how electrons have wave like properties. James Chadwick then discovers the neutron!

There ya have it!
6 0
3 years ago
Solve. List your answer in scientific notation and use sig figs.<br> (3.2 x 10^-4)/(1.4 x 10^8)
son4ous [18]
0.00032 / 140000000
=0.000000000002
=2 x 10^-12
3 0
3 years ago
Pls answer this question and have a AMAGING day!! :))
ladessa [460]

Answer:

B

Explanation:

because it is being cooled down

hoped this helps

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3 years ago
Which of these is a balanced chemical equation?
Alex777 [14]
I believe its G because it has the same amount of particles. (I haven't had much background)
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4 years ago
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