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Nadusha1986 [10]
3 years ago
6

Molecular data suggest that plastids originated as __________ engulfed by a heterotrophic eukaryote.

Chemistry
1 answer:
lord [1]3 years ago
3 0
<span>the answer is cyanobacteria</span>
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Write a net ionic equation for the reaction that occurs when excess hydroiodic acid and nickel(II) sulfide are combined.
tiny-mole [99]

Explanation:

Step 1: Write the balanced "molecular" equation:

2HI(aq) + NIS (s) → NiI₂(aq) + H₂S(g)

Step 2: H₂S is written in molecular form. Consult the solubility and net ionic equation rules on the information page to determine which of the other substances will dissociate:

2HI(aq) + NIS (s) → NiI₂(aq) + H₂S(g)

yes no yes

Step 3: Dissociate all soluble salts, strong acids, and strong bases (except calcium hydroxide). Leave together all "not soluble" salts and weak acids or bases:

{2H₃O}^{ + }  (aq) +  {2I}^{ - }  (aq) + NiS(s)→  { Ni}^{2 + }(aq) +  {2I}^{ - }(aq) + H₂S(g) + 2H₂O(l)

Step 4: Cross out "spectator ions" that appear on both sides of the reaction (these ions do not participate in the chemistry) and rewrite the "net" reaction using the smallest possible coefficients:

{2H₃O}^{ + } (aq) + NiS(s) →   { Ni}^{2 + } (aq) + H₂S(g) + 2H₂O(l)

4 0
3 years ago
Which of the following statements is true?
Flauer [41]

Answer:

D. Q does not depend on the concentration or partial pressures of reaction components

8 0
3 years ago
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The answer to the question is B D E
6 0
3 years ago
Julio hit a baseball. What caused the ball to change direction
Zepler [3.9K]
The force of the swing. 
Hoped I helped, and please tell me if I am wrong.
8 0
3 years ago
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Over the past 150 years, how has fossil fuel consumption affected the carbon dioxide concentrations in the atmosphere?
Eduardwww [97]
Hello!

Fossil fuels are Carbon-based compounds that when heated in the presence of oxygen undergo a combustion reaction to produce thermal energy and gases. The chemical equation for the combustion of a generic Fossil Fuel (C) is the following:

C + O₂ →CO₂

From this chemical reaction, we can see that CO₂ (Carbon Dioxide) is produced, so the consumption of fossil fuels has increased the Carbon Dioxide concentrations in the atmosphere.

Have a nice day!


6 0
3 years ago
Read 2 more answers
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