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Eva8 [605]
2 years ago
7

Help me answer this question pls

Chemistry
1 answer:
Anarel [89]2 years ago
5 0
Electrical energy !! i hope this helped :))
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A geologist finds a mineral sample alongside a swift flowing river. She determines the mineral is a type of Quartz. Which is tru
Minchanka [31]
I would say d or b sorry im not that good
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3 years ago
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I’m not sure on this!!!
Talja [164]

Answer:

-14

Explanation:

H=-6

G=7

therefore,

=7(H)+4(G)

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8 0
2 years ago
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The oxidation of copper(I) oxide, Cu 2 O ( s ) , to copper(II) oxide, CuO ( s ) , is an exothermic process. 2 Cu 2 O ( s ) + O 2
ICE Princess25 [194]

Answer:

The energy released as heat when 9.94 g Cu 2 O ( s ) undergo oxidation at constant pressure is -10.142 kJ

Explanation:

Here we have

2Cu₂O ( s ) + O₂ ( g ) ⟶ 4 CuO ( s ) Δ H ∘ rxn = − 292.0 kJ mol

In the above reaction, 2 Moles of Cu₂O (copper (I) oxide) react with one mole of O₂ to produce 4 moles of CuO, with the release of − 292.0 kJ/mol of energy

Therefore,

1 Moles of Cu₂O (copper (I) oxide) react with 0.5 mole of O₂ to produce 2 moles of CuO, with the release of − 146.0 kJ  of energy

We have 9.94 g of Cu₂O with molar mass given as 143.09 g/mol

Hence the number of moles in 9.94 g of Cu₂O is given as

9.94/143.09 = 6.95 × 10⁻² moles of Cu₂O

6.95 × 10⁻² moles of Cu₂O will therefore produce 6.95 × 10⁻² ×  − 146.0 kJ mol  or -10.142 kJ.

3 0
3 years ago
HELP NEEDED<br> How many nanoliters are in 1 liter. Show work
DochEvi [55]

1 000 000 000 nanoliters

7 0
2 years ago
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Question 3
algol [13]

Answer:

Curd is acidic in nature, because an acidic substance has less value of pH. A milkman adds a very small amount of baking soda to fresh milk. Why does he shift the pH of the fresh milk from 6 to slightly alkaline? Answer: By making the milk more alkaline, it takes more time to turn into curd.

6 0
3 years ago
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