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Elodia [21]
4 years ago
14

I NEED ANSWER TONIGHT PLZ!!!! :(

Chemistry
2 answers:
Anna11 [10]4 years ago
6 0
The answer would be reducing the concentrations of reactant molecules
melisa1 [442]4 years ago
6 0

Answer:

I think adding a catalyst

Explanation:

From what I found, any of the first 4 don't work, reducing the concentrations of reactant molecules just decreases the chances of it reacting, decreasing the temperature does more or less the same, as it takes away energy, decreasing the surface area of the particles does more or less nothing in this situation, but for a reaction to occur, you need to add energy, which only the catalyst does. good luck!

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What changes occur in O + O = O2
ozzi

Answer:

They went from atoms to oxygen molecule.

Explanation:

I'm not sure if this is the answer your teacher is looking for, but in simple terms you had 2 oxygen atoms. Together they make an oxygen molecule, which is the stuff we breathe.

5 0
3 years ago
Distinguish between zinc nitrate and lead nitrate ​
Kobotan [32]

Answer:

Zinc nitrate gives white ppt. which dissolves in excess ammonium hydroxide and produce a colorless solution whereas lead nitrate gives a chalky white ppt. of lead hydroxide which doesnot dissolve.

Explanation:

Hope this helps :)

7 0
3 years ago
What are minerals in the rest of the water.
garri49 [273]

Answer:

-calcium

-magnesium.

5 0
4 years ago
Calculate the density a rectangular block of a metal whose length is 8.335cm width is 1.02cm height is 0.982cm and mass is 62.35
Ostrovityanka [42]

Answer:

Density rectangular block = 7.47 (Approx) gm/cm³

Explanation:

Given:

Length = 8.335 cm

Width = 1.02 cm

Height = 0.982 cm

Mass = 62.3538 gm

Find:

Density rectangular block

Computation:

Volume of block = lbh

Volume of block = (8.335)(1.02)(0.982)

Volume of block = 8.3486 cm³

Density = Mass / Volume

Density rectangular block = 62.3538 / 8.3486

Density rectangular block = 7.47 (Approx) gm/cm³

8 0
3 years ago
If pollution is increased, then the cricket frog population will (increase/decrease/stay the same) over the span of five years.
stepladder [879]
I am guessing it will decrease
4 0
3 years ago
Read 2 more answers
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