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amm1812
3 years ago
15

A child is upset because his ice cream is melting. He thinks he now has less dessert. Which of these explanations correctly stat

es why the child is incorrect?
Chemistry
1 answer:
11Alexandr11 [23.1K]3 years ago
4 0
The ice cream melts because it is gaining heat and energy from an endothermic reaction but the mass of the ice cream never leaves the cone. This is because the Law of Conservation of Mass says that matter is not created nor destroyed. Where can the mass go exactly?
Nowhere because it stays in the cone and is the same amount of ice cream as before.
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Answer:

Explanation:

Alka Seltzer tablet contains 325 mg of aspirin (acetylsalicylic acid), 1000 mg of citric acid, and 1916 mg of sodium bicarbonate. The acids originally contained in a tablet give only 17.4 mmol of H+, which is not enough to neutralize all of the sodium bicar- bonate (22.8 mmol).

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Why did most scientists reject Wegner's theory for nearly a half century?
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3 0
3 years ago
If the gas in the piston above has a volume of 20.0 L at a temperature of 25 C what is the volume of that gas when it is heated
dexar [7]

Answer:

15.98 L

Explanation:

First, you need to find T1, T2, V1 and V2.

T1 = 25 C = 298.15 K (25C + 273.15K)

T2 = 100 C = 373.15 K (100C + 273.15K)

V1 = 20. L

V2 = ? (we are trying to find)

Next, rearrange to fit the formula

V2 = V1 x T1 / T2

Next, fill in with our numbers

V2 = 20. L x 298.15 K / 373.15 K

Do the math and you should get...

15.98 L

- If you need more help or futher explanation please let me know. I would be glad to help!

8 0
3 years ago
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Answer:

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Explanation:

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Hence,

The concentration of potassium is maintained in the red blood cells via the process of active transport.

3 0
3 years ago
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