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Juliette [100K]
3 years ago
6

You find a geode while hiking. You place it on a scale and find it has a mass of 62 g.

Chemistry
1 answer:
dexar [7]3 years ago
5 0

Answer:

B

Explanation:

I think that's it.. hope I helped you

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How many kilojoules of heat are released when 0.72 mole of oxygen gas are used to combust methane?
KonstantinChe [14]

0.72 mole of oxygen would produce 320.4 kJ of heat.

<u>Explanation:</u>

CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (ℓ) + 890kJ

According to the equation,

2 moles of O₂ produces 890 kJ of heat

So, 0.72 moles of O₂ will produce:

= \frac{890}{2} X 0.72\\\\= 445 X 0.72\\\\= 320.4 kJ

Therefore, 0.72 mole of oxygen would produce 320.4 kJ of heat.

6 0
3 years ago
For which salt is the aqueous solubility most likely to change by changing the pH of the solution?
Hoochie [10]

The salt whose aqueous solubility will most likely to change the pH of the solution is CaF2(aq).

The pH of a salt solution depends on the nature of the acid and base that forms the salt.

  • Salt of a weak acid and a strong base yields a basic solution
  • Salt of a strong acid and a weak base yields an acidic solution
  • Salt of a strong acid and a strong base yields a neutral solution.

Since HF is a weak acid, its salt CaF2 will be slightly basic when dissolved in water hence the pH of the solution is altered.

Learn more: brainly.com/question/14072179

4 0
2 years ago
Which device involves the use of plasma in technology
Bas_tet [7]

Plasma if fourth phase of matter

Plasma technique is used where fire is used

So the correct answer is arc welder

4 0
3 years ago
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Marking brainlist Why are resources such as coal, oil, or natural gas considered nonrenewable?
crimeas [40]

Renewable and nonrenewable resources are energy sources that human society uses to function on a daily basis. The difference between these two types of resources is that renewable resources can naturally replenish themselves while nonrenewable resources cannot. This means that nonrenewable resources are limited in supply and cannot be used sustainably.

Lol, I hope that was helpful!

3 0
2 years ago
How would an apple, potato, and onion all taste the same?
castortr0y [4]

Answer:

A

Explanation:

Says it on the side of meh screen :P

(Ez question in lol)

6 0
2 years ago
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