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artcher [175]
3 years ago
15

Substance _____ involves repeated, harmful use of a substance whereas substance _____ is a physical and/or psychological addicti

on to a harmful substance.
Chemistry
1 answer:
alina1380 [7]3 years ago
6 0
Substance abuse... Substance addiction or dependence??
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1. How is the activity series useful in predicting chemical behavior?​
Bas_tet [7]

Answer:

It shows the most reactive to least reactive, so that we can predict whether certain reactions will occur. Any metal can replace any metal below it, but not above it.

Explanation:

4 0
3 years ago
What situation would not encourage competition ?
just olya [345]

Answer:

2

Explanation:

it leads to more food which leads to a  decrease in competition

hope this helps :)

6 0
3 years ago
34 atoms of carbon (C) react with 22 molecules of hydrogen gas (H2). How many molecules of methane (CH4) will be formed, and wha
kolbaska11 [484]

Answer:

11 molecules of CH4.

23 atoms of C is the leftover.

Explanation:

Hello!

In this case, for the formation of methane:

C+2H_2\rightarrow CH_4

We can see there is an excess of carbon based on their stoichiometry, because the needed amount of hydrogen gas molecules would be:

molecules _{H_2}=34atomC*\frac{2molec\ H_2}{1atomC} =68molec\ H_2

Thus, the formed molecules of methane are computed below:

molec\ CH_4=22molec\ H_2 *\frac{1molec\ CH_4}{2molmolec\ H_2} \\\\molec\ CH_4=11molec\ CH_4

In such a way, the leftover of carbon atoms are:

atoms \ C^{left over}=34-22molec\ H_2*\frac{1atoms C}{2molec\ H_2} \\\\atoms \ C^{left over}=23 atoms C

Best regards!

4 0
2 years ago
A gas is contained in a thick walled balloon. when the pressure changes from 417 mm hg to 576 mm hg, the volume changes from ___
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Initial volume is 8.5. Could I get best answer??
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3 years ago
Which statement below references interactions between the geosphere, the hydrosphere and the biosphere?
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