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DedPeter [7]
3 years ago
11

A chemical element is a pure substance that consists entirely of what?

Chemistry
1 answer:
Novosadov [1.4K]3 years ago
7 0
Ans: consists of atoms
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Hi first one to answer ill give them brainliest <br> can you make a 3-D water cycle in a box?
Eva8 [605]

Answer: if ur talking abt a project,

yes, there will have to be a way to see how it looks like so it can't be a full box. so like the front or the top or anything has to be cut.

plus, if the water cycle itself would have to be printed to be a box shape

if not in a box shape, it can be inside a box. that would make it any shape but it's still in a box.

Explanation:

5 0
3 years ago
Read 2 more answers
By what factor will the rate of the reaction change if the ph decreases from 6.00 to 2.00? express your answer numerically using
jeyben [28]
The reaction equation is first order with respect to [H+]

when PH1 = -㏒[H+]1  so, when PH = 6

So by substitution:

∴ 6 = -㏒[H+]1

∴[H+]1 = 1 x 10^-6

and when PH2 = -㏒[H+]2 so, when PH2 = 2

so by substitution:

∴ 2 = -㏒[H]2

∴[H]2 = 1 x 10^-2

So the rate of reaction changes by the factor of:

[H2]2/[H]1 = (1 x 10^-2) / (1 x 10^-6) = 10000

It is 10000 times faster when PH decreases from 6 to 2
5 0
4 years ago
At stp what element is a good conductor of electricity?
Vlad1618 [11]
Copper is a good conductor
3 0
3 years ago
An ice cube at 0.00C with a mass of 8.32g is placed Into 55g of water, initially at 25C. If no heat is lost to the surroundings,
devlian [24]

Answer:

The final temperature of the entire water sample after all the ice is melted, is 12,9°C. We should realize that if there is no loss of heat in our system, the sum of lost or gained heat is 0.  It is logical to say that the temperature has decreased because the ice gave the water "heat" and cooled it

Thats all i know

7 0
3 years ago
a 10g cookie is burned in a calorimeter causing the temperature of 20 g water to change from 3°C to 5°C, What us the energy cont
Morgarella [4.7K]

Answer:

30 g. 8'C

Explanation:

the 10 g is plus the fact that I have to help you get the chance to get the answer

5 0
3 years ago
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