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Lelu [443]
2 years ago
11

HELP ME NOW ASAP PLEASE, 10 POINTS HURRY

Chemistry
1 answer:
xxMikexx [17]2 years ago
7 0
Which of those depend on mayfly nymphs. In other terms which animal eats mayfly nymphs?

I would say frogs
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The alkali metals all react with water. which is the most reactive metal?
kifflom [539]
Alkali Metals (Group 1) elements experience an increase in the vigour of their reaction in water as they go down the group (as the atomic number increase). As such the most reactive Alkali Metal would be FRANCIUM, which is at the base of Group One.


Quite frankly, you do not want Francium to react with water- that's a huge explosion on your hand.

8 0
3 years ago
how many H+ ions are in a solution with a pH of 2 and how many H+ ions are in a solution with a pH of 6?
LiRa [457]

Answer:

i) pH = 2

pH = -log(H+)

:- (H+) = 10^(-2)

:- (H+) = 0.01 M

ii) pH = 6

pH = -log(H+)

:- (H+) = 10^(-6)

:- (H+) = 0.000001 M

Explanation:

By definition: pH = -log(H+).

Given your pH, solve for the H+ using the the following log rule:

if a = (+/-) log (b) then

b = 10^((+/-) a).

Also remember unit of concentration is molar (M)

3 0
3 years ago
Which term best describes the role of hydrogen gas in the formation of water molecules?
kobusy [5.1K]
The answer is D, reactant.
6 0
3 years ago
Why are experimental investigations the best type of scientific investigation to demonstrate cause-and-effect relationships?
Fudgin [204]

Answer:

are the best type of scientific investigation to demonstrate cause-and-effect relationships because they allow the investigator to actively manipulate variables and control conditions.

7 0
3 years ago
During the formation of a chemical bond, _________ must be transferred or shared between atoms to satisfy the octet rule. A) pro
ehidna [41]

Answer:

I think it's A or D im not sure which one..

3 0
3 years ago
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