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wel
3 years ago
12

Can you please do this on paper. Please and thank you

Chemistry
1 answer:
-BARSIC- [3]3 years ago
6 0

i dont have paper but heres where they should go

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Describe the observation Robert Brown made.​
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Answer:

In 1827, Brown observed, using a microscope, that small particles ejected from pollen grains suspended in water executed a kind of continuous and jittery movement, this was named “Brownian motion”. ... This random movement of particles suspended in a fluid is now called after him.

Explanation:

HOPE this helps :)

3 0
3 years ago
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What is the pH of a solution that has 7.8x10-9 [H+]?
xxTIMURxx [149]

Answer:

8.11

Explanation:

pH = -log[H+]

pH = -log[7.8 x 10^{-9}]

pH = 8.107905...

pH = 8.11

5 0
3 years ago
For the following reaction, the equilibrium constant Kc is 0.80 at a certain temperature. If the concentration of NO(g) and NOBr
velikii [3]

Answer:

[Br₂] =  1.25M

Explanation:

        2NO (g)  +  Br₂ (g)   ⇄   2NOBr (g)

Eq    0.80M            ?                0.80M

That's the situation told, in the statement.

Let's make the expression for Kc

Kc = [NOBr]² / [Br₂] . [NO]²

Kc = 0.80² / [Br₂] . [0.80]²

0.80 = 1 / [Br₂]

[Br₂] = 1 / 0.80 → 1.25

4 0
4 years ago
Which element reacts spontaneously with 1.0M HCl (aq) at room temperature?
Ad libitum [116K]
<span>(4) zinc.................</span>
8 0
3 years ago
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The appropriate geometric "fixing" of two atoms which is necessary to start chemical rearrangement is called the:
ahrayia [7]
Hello there.

Question: <span>The appropriate geometric "fixing" of two atoms which is necessary to start chemical rearrangement is called the:

Answer: It is called activation complex.
</span><span>
Hope This Helps You!
Good Luck Studying ^-^</span>
4 0
4 years ago
Read 2 more answers
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