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Ulleksa [173]
2 years ago
5

In what way does a temporary magnet provide an advantage over a permanent magnet?

Chemistry
2 answers:
Vilka [71]2 years ago
7 0

Answer:

A temporary magnet allows the user to determine when it is magnetic.

Murljashka [212]2 years ago
4 0

Answer:

A temporary magnet allows the user to determine when it is magnetic.

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Input an output  energy
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Name a common greenhouse gas with only hydrogen and oxygen
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I'm guessing water vapour. i can't think of any other gas limited to only hydrogen and oxygen

hope it helps :)
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What is more likely to happen if wetlands are drained?
Rudik [331]
Animals and Plants won't have a place to live, get food and resourses. Some organisms won't have anyshelter, because some live in the water. 
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3 years ago
Consider these changes.
Ede4ka [16]

Answer:

(a) The system does work on the surroundings.

(b) The surroundings do work on the system.

(c) The system does work on the surroundings.

(d) No work is done.

Explanation:

The work (W) done in a chemical reaction can be calculated using the following expression:

W = -R.T.Δn(g)

where,

R is the ideal gas constant

T is the absolute temperature

Δn(g) is the difference between the gaseous moles of products and the gaseous moles of reactants

R and T are always positive.

  • If Δn(g) > 0, W < 0, which means that the system does work on the surroundings.
  • If Δn(g) < 0, W > 0, which means that the surroundings do work on the system.
  • If Δn(g) = 0, W = 0, which means that no work is done.

<em>(a) Hg(l) ⇒ Hg(g)</em>

Δn(g) = 1 - 0 = 1. W < 0. The system does work on the surroundings.

<em>(b) 3 O₂(g) ⇒ 2 O₃(g) </em>

Δn(g) = 2 - 3 = -1. W > 0. The surroundings do work on the system.

<em>(c) CuSO₄.5H₂O(s) ⇒ CuSO₄(s) + 5H₅O(g) </em>

Δn(g) = 5 - 0 = 5. W < 0. The system does work on the surroundings.

<em>(d) H₂(g) + F₂(g) ⇒ 2 HF(g)</em>

Δn(g) = 2 - 2 = 0. W = 0. No work is done.

3 0
3 years ago
1. Ethanol has a density of 0.800 g/mL. <br> What is the mass of 225 mL of ethanol?
ziro4ka [17]

Answer: I have no clue.

Explanation:

45.0

4 0
3 years ago
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