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JulijaS [17]
3 years ago
7

10. Liquid changing to gas only at the surface is called

Chemistry
1 answer:
mina [271]3 years ago
3 0

Answer:

Evaporation

Explanation:

Though it doesn't require high temperatures to do so

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Plz someone help me i dont get this and i need to finish this
Verizon [17]

Answer:

The height of A is 900

Explanation: Beside A, there is a number which explains what the height is so the answer is A.

5 0
3 years ago
What mass of water is produced by the combustion 1.2 x 10^26 molecules of butane ?
podryga [215]

Answer:

17.934 kg of water

Explanation:

If balanced equation is not given; this format can come in handy.

For any alkane of the type : CₙH₂ₙ₊₂ , it's combustion reaction will follow:

2CₙH₂ₙ₊₂ + (3n+1) O₂  →  (2n)CO₂ + 2(n+1) H₂O

For butane:

2C₄H₁₀(g) + 13O₂(g) →  8CO₂(g) + 10H₂O(l)

2 moles of butane gives 10 moles of water.

1 mol of any substance has Avogadro number(N) of molecules in it( 6.022 x 10²³)

Mass of 1 mole of any substance is equal to it's molar mass

So, if 2 x N molecules of butane gives 10 x 18 g of water.

Then  1.2 x 10²⁶ molecules will give:

\frac{1.2 \times 10^{26} \times 180}{2 \times 6.022 \times  10^{23}}

= 17.934 x 10³ g of water

= 17.934 kg of water

5 0
3 years ago
What superhero gained his powers by becoming a transgenic organism?
Karolina [17]

Answer:

B.spiderman

Explanation:

DNA has been transferred to another species. Spiderman became Spiderman when DNA from a spider combined with a human.

7 0
2 years ago
Less energy was entering Earth's
ololo11 [35]

Answer:

The temperatures on Earth increase

Explanation:

more energy results in more heat.

6 0
3 years ago
9.
Wewaii [24]
Answer: A) Water Explanation: Water molecules are polar molecules
6 0
3 years ago
Read 2 more answers
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