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sesenic [268]
3 years ago
14

Science thing............ Select the correct answer ♡

Chemistry
1 answer:
Alika [10]3 years ago
3 0

Answer:

d

Explanation:

sugar molecules are being broken down

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What is the one or two letter character used to identify an element?
Aleksandr-060686 [28]
A. element symbol!!!
8 0
3 years ago
Read 2 more answers
You are given a piece of paper and a match. The paper has a mass of 2.5 g. You then light the match and light the piece of paper
kow [346]

Answer:

No

Explanation:

<em>No. </em>T<em>he demonstration does not violate the conservation of mass.</em>

<u>The law of conservation of mass states that mass can neither be created nor destroyed in a reaction. However, mass can be converted from one form to another during the reaction.</u>

In this case, even though the remaining bits of paper weigh 0.5 g while the original paper weighed 2.5 g, the ashes and smoke/gas from the burning will all add up to the lost weight of the paper.

<em>The burned part has been converted into other forms. If the smoke/gas and the ashes are properly captured, they will mark up with the weight of the remaining paper to give the weight of the original paper. </em>

5 0
3 years ago
The original substance can be recovered.<br> Is this and physical change or chemical change?
vlabodo [156]

Answer:

That's not true. It would in fact be physical.

Explanation:

physical change: some of its physical properties may change but its identity does not

6 0
3 years ago
How many moles of aluminum are equivalent to 4.816 x 1024 atoms?
CaHeK987 [17]

Answer:

<h2>8 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{4.816 \times  {10}^{24} }{6.02 \times  {10}^{23} }  = 8 \\

We have the final answer as

<h3>8 moles</h3>

Hope this helps you

6 0
3 years ago
Read 2 more answers
Select the correct answer.
cupoosta [38]

Answer:

A.

as the sum of the energy of the products and the energy of the reactants.

Explanation:

Because the sun is on top of the energy.

3 0
3 years ago
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