Answer to A, B, C, and D

Chemistry

1 answer:

liq [111]3 years ago

4 0

A. Is balanced
B. Not balanced
C. Balanced
D. Not balanced

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How many moles are in a sample of 4.57 x 10^24 atoms of neon (Ne)?

balu736 [363]

Hello!

To find the number of moles in a sample of 4.57 x 10^24 atoms, we need to use Avogadro's number, which is 1 mole = 6.02 x 10^23.

To find how many moles, we divide the given sample by Avogadro's number.

(4.57 x 10^24) / (6.02 x 10^23) ≈ 7.59136

Using the amount of significant figures given (3), the answer is 7.59 moles of neon (Ne).

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3 years ago

PLEASE HELP ME TAKE SOO LONG! (ima fail this test!) its a study guide!

kakasveta [241]

I think it might be C or D

6 0

3 years ago

How much heat is absorbed by a 112.5 g sample of water when it is heated from 12.5 °C to 92.1 °C? (Specific heat capacity of wat

Alborosie

Answer:

$\boxed {\boxed {\sf37,467.72 \ Joules }}$

Explanation:

We are asked to find how much heat a sample of water absorbed. Since we are given the mass, temperature, and specific heat, we will use the following formula.

$q=mc \Delta T$

The mass (m) of the sample is 112.5 grams. The specific heat capacity of water (c) is 4.184 Joules per gram degree Celsius. The difference in temperature (ΔT) is found by subtracting the initial temperature from the final temperature.