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Law Incorporation [45]
2 years ago
6

Which of the following materials fall in the category of a ‘‘pure substance’’?

Chemistry
1 answer:
pishuonlain [190]2 years ago
6 0

Answer:

1) <em>Ice, iron, calcium oxide and mercury</em> are <u>pure substances since they contain particles of only one kind of matter.</u>

2) <em>In contrast, milk, hydrochloric acid</em> (hydrogen chloride gas dissolved in water), brick and air cannot be called <u>pure substances because they consists of particles of more than one kind of matter.</u>

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Why is it important to know what weather fonts are
morpeh [17]

Answer: In order to forecast the weather, they study high and low pressure systems and the boundaries between them which is why they are called weather fonts

Explanation:

4 0
3 years ago
A galvanic cell is powered by the following redox reaction:2Fe+3(aq) + H2 (g) + 2OH−(aq) → 2Fe+2 (aq) + 2H2O (l)Answer the follo
ICE Princess25 [194]

Answer:

Anode: H₂(g) + 2 OH⁻(aq) → 2 H₂O(l) + 2 e⁻

Cathode: 2 Fe⁺³(aq) + 2 e⁻ → 2 Fe⁺²(aq)

E° = 1.60 V

Explanation:

Let's consider the reaction taking place in a galvanic cell.

2 Fe⁺³(aq) + H₂(g) + 2 OH⁻(aq) → 2 Fe⁺²(aq) + 2 H₂O(l)

The corresponding half-reactions are:

Anode (oxidation): H₂(g) + 2 OH⁻(aq) → 2 H₂O(l) + 2 e⁻   E°red = - 0.83 V

Cathode (reduction): 2 Fe⁺³(aq) + 2 e⁻ → 2 Fe⁺²(aq)        E°red = 0.77 V

The standard cell potential (E°) is the difference between the standard reduction potential of the cathode and the standard reduction potential of the anode.

E° = E°red, cat - E°red, an = 0.77 V - (-0.83 V) = 1.60 V

7 0
4 years ago
Which two terns describe this type of data? First to answer (correct) gets brainlist
Nina [5.8K]

Answer:

The is B. and D.

Explanation:

5 0
4 years ago
Use the reaction shown l to answer these questions.
Varvara68 [4.7K]

Answer:

16.8dm3

Explanation:

2 moles of CO gives 1 mole of N2

2 moles of CO= 2* 28= 56g

1 mole of N2 = 1* 22.4dm

56g of CO gives 22.4dm3 of N2

42.7 of CO will give> (42.7*22.4)/56

=16.8dm3

8 0
3 years ago
24-Complete the following sentence:
docker41 [41]

Answer:

B. Solvent

Explanation:

In osmosis, water always moves from low solute concentration to high solute concentration. SOLUTE NEVER MOVES AS IT CANNOT PASS THE SELECTIVELY PERMEABLE MEMBRANE. alot of caps but need to stress this concept cuz otherwise this concept gets very confusing

8 0
3 years ago
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