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3 years ago

What type of solid is candle wax? Pls explain

1 answer:

5 0

<span>the type of solid of the candle wax is amorphous.

as the amorphous is doesn't melt at a certain temperature . and it is amorphous because it gets softer and softer and it doesn't melt at a certain temperature. so the wax shape change and being softer and when it re-cooled its shape will become harder again, without melting at distinct temperature.</span>

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for a theoretical yield of 22 g and actual yield of 13 g, calculate the percent yield for a chemical reaction

sammy [17]

Answer:

59.09%

Explanation:

13/22*100=59.09%

8 0

2 years ago

Describe two physical and two chemical changes involved in cooking. (4 points)

Ivenika [448]

Physical changes are when things get changed without altering chemical consistencies, which is melting solid butter into liquid one, or boiling water. Chemical changes are things such as caramelizing sugar when making sweets, or when carbon dioxide is created and released when baking bread.

7 0

3 years ago

The density of water is 1 gm/ml. An object has a mass of 58 grams. What volume must it have in order to float in water?

Keith_Richards [23]

Answer:

58mL

Explanation:

Given parameters:

Density of water = 1g/mL

Mass of object = 58g

Unknown:

The volume the object must have to be able to float in water = ?

Solution:

To solve this problem, we know that the object must have density value equal to that of water or less than that of water to be able to float.

We then set its density to that of water;

Density = $\frac{mass}{volume}$

Volume = $\frac{mass}{density}$

So;

Volume = $\frac{58}{1}$ = 58mL

7 0

2 years ago

Calculate the percentage composition of Mg3 (Po4)2

lutik1710 [3]

Mg3(PO4)2 - the molar mass would be 262g/mol, which is 100%

Atomic mass of Mg is 24, since we have 3Mg we multiply by 3 and get a mass of 72

262 : 100% = 72 : x%

x = 72*100 / 262

x = 27.5%

And do that for every element — get the molar mass of P and multiply by 2, use a ratio, and get the molar mass of O and multiply by 8 and use ratios :)

7 0

2 years ago

Use this oxidation-reduction reaction to answer questions about half-reactions:

Advocard [28]

Answer:

N, O, R

Explanation:

Thanks for answering bro, you saved me

5 0

2 years ago