Primordial swamps decomposing under ancient seas and tons of rock layers gave rise to an important fuel used today. That fuel is

Chemistry

2 answers:

motikmotik3 years ago

8 0

I believe the correct answer is C. Coal. It is used to make tons of things in the world. I hope this helps :)

nata0808 [166]3 years ago

6 0

C) coal

I had this question and it was c

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Scoring: Your score will be based on the number of correct matches minus the number of incorrect matches. There is no penalty fo

bonufazy [111]

Answer:

- Ammonium perchlorate: acidic, so its pH will be less than 7.

- Sodium fluoride: basic, so its pH will be greater than 7.

- Calcium chloride: neutral, so its pH will be approximately equal to 7.

- Calcium nitrate: neutral, so its pH will be approximately equal to 7.

Explanation:

Hello,

In this case, we can foresee whether the given bases are acidic, neutral or basic by knowing both the acid and base they come from. In such a way, if a strong acid reacts with a strong base, the resulting salt is neutral, next, if a strong acid reacts with a weak base the resulting salt is acidic and if a weak acid reacts with a strong base the resulting salt is basic. Therefore, we have:

- Ammonium perchlorate: it comes from ammonium hydroxide or ammonia that are weak bases and perchloric acid which is a strong acid, therefore the salt is acidic so its pH will be less than 7.

- Sodium fluoride: is comes from sodium hydroxide which is a strong base and hydrofluoric acid which is a weak acid, therefore the salt is basic so its pH will be greater than 7.

- Calcium chloride: it comes from calcium hydroxide and hydrochloric acid which are both strong, for that reason the resulting salt will be neutral so its pH will be approximately equal to 7.

- Calcium nitrate: it comes from calcium hydroxide and nitric acid which are both strong, for that reason the resulting salt will be neutral so its pH will be approximately equal to 7.

Best regards.

5 0

4 years ago

Calculate Ecell for the following electrochemical cell at 25 ºCPt (s) | H2 (g, 1.00 atm) | H+ (aq, 1.00 M) || Sn2+ (aq, 0.350 M)

katrin2010 [14]

Answer: The electrode potential of the cell is 0.093 V

Explanation:

The given chemical cell follows:

$Pt(s)|H_2(g,1atm)|H^+(aq,1.00M)||Sn^{4+}(aq,0.020M)|Sn^{2+}(aq.,0.350M)|Pt(s)$