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Goryan [66]
3 years ago
15

Which of the four hypothetical substances you investigated would be most harmful to living organisms

Chemistry
1 answer:
Hoochie [10]3 years ago
5 0
I believe the most harmful substance would be element C, this is because element C has a very long half life therefore it has a very slow rate of a decay. Half life of a substance it the time taken for substance to decay to half its original mass or amount.
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Three Balanced equations for Ammonium salt+Alkali=Salt+water+carbon dioxide
arlik [135]

Answer:

NH₄Cl (aq) + NaOH (aq) -> NaCl (aq) + H₂O (l) + NH₃ (g)

(NH₄)₂CO₃ (aq) + 2KOH (aq) -> K₂CO₃ (aq) + 2H₂O (l) + 2NH₃(g)

NH₄NO₃ (aq) + LiOH (aq) -> LiNO₃ (aq) + H₂O (l) + NH₃ (g)

Explanation:

The gas liberated when an alkali reacts with an ammonium salt is NH₃ (ammonia), not CO₂.

4 0
3 years ago
1)
MAXImum [283]

Answer:

Sulfuric acid + Zinc = reactant

Zinc sulfate + hydrogen = product

Lead oxide + carbon = reactant

lead + carbondioxide = product

Explanation:

Chemical equation:

Sulfuric acid + Zinc → Zinc sulfate + hydrogen

H₂SO₄ + Zn → ZnSO₄ + H₂

In this reaction sulfuric acid and zinc react to produce the zinc sulfate and hydrogen. That's why sulfuric acid and zinc are reactant. While zinc sulfate and hydrogen are products.

2nd reaction:

Lead oxide + carbon   →  lead + carbondioxide

2PbO + C →  2Pb + CO₂

In this reaction Lead oxide and carbon  react to produce the lead and carbondioxide. That's why Lead oxide and carbon are reactant. While lead and carbondioxide are products.

3 0
3 years ago
Three alternate energy sources are:
inysia [295]

Answer: coal oil and gas

Explanation:

3 0
3 years ago
I don’t know what the answer is
BlackZzzverrR [31]
4th one is the answer sorry if i am wrong i tried my best!

4 0
3 years ago
Which elements always have 11 protons on the periodic table ​
sweet-ann [11.9K]

Answer:

I think sodium it may be wrong soŕry

5 0
4 years ago
Read 2 more answers
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