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Artyom0805 [142]
3 years ago
13

I'm not really sure on how to test if it is a chemical or physical change....

Chemistry
1 answer:
kolezko [41]3 years ago
4 0
Chemical change because it cannot be reversed
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The following equation is an example of a ______________ reaction. 2 NaCl + F2 → 2 NaF + Cl2 ???
olga55 [171]

Answer:

double replacement is the answer

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3 years ago
Which of the following is most likely to dissolve in NH3? A) CO2 B) CH4 C) H2S D) BH3
dem82 [27]

Answer:

C) H2S

Explanation:

In chemistry, the dissolution of one substance in another is dependent on the magnitude of intermolecular interaction between the two substances.  Hence, if two substances do not interact in one way or the other, then one can not dissolve the other.

Let us consider the fact that NH3 is a polar molecule and it is a general principle that like dissolves like. Hence, only H2S which is also a polar molecule can effectively interact with  NH3 due to dipole-dipole interaction between the two molecules.

Also, ammonia reacts with hydrogen sulphide as follows;

2NH3 + H2S → (NH4)2S

Hence H2S is more likely to dissolve in NH3.

5 0
3 years ago
What is the total amount of heat required to completely melt 347 grams of ice at its melting point?
Bogdan [553]
In order to calculate the amount of heat energy required to melt 347 grams of ice, we need to will apply the equation:
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Q = 347 x 334
Q = 112,558 joules of energy

Hope this helped.
7 0
3 years ago
An enzyme is: a. A biological reactant b. A biological product c. A biological catalyst d. a biological co-factor
vovangra [49]
It is <span>a substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction.
So I think C matches the discription </span>
8 0
3 years ago
Read 2 more answers
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larisa86 [58]
C+O2=CO2. The 2 would be smaller than the chemical symbol. Hope this helped
8 0
3 years ago
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