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photoshop1234 [79]
3 years ago
12

Which of the following forms a new substance? melting, evaporating, freezing or burning

Chemistry
2 answers:
Alekssandra [29.7K]3 years ago
7 0

Answer:

burning

Explanation:

Burning or combustion is a chemical change. Hydrocarbon in the presence of oxygen burns to form carbon dioxide and water. In chemical change reactants react with one another to form new products. In chemical change the chemical composition and chemical property  of the reactants and products and different from each other.

In a physical change there is only a change in the phase of the substance no new substance is formed. Melting, evaporating, freezing are all phase changes hence they are all physical changes.

Slav-nsk [51]3 years ago
4 0
It would be burning be cause when you freeze, evaporate, or melt anything it is just changing how fast the atoms are moving . Think of it like water, ice, and steam, they are all the same thing but in different forms because of melting, evaporating,and melting. Burning is breaking it down.
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The latent heat of melting is 80 calories for 1 gram of ice. if 1 gram of ice absorbs 60 calories what do i get?
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Read 2 more answers
Bi2(CO3)3<br> Name of this compound
Keith_Richards [23]

Answer:

The name of this compound is :

Bi2(CO3)3 = Bismuth Carbonate

Explanation:

The name of the compound is derived from the name of the elements present  in it.

The rule followed while naming the compound are:

1. The first element (always the cation) is named as such .

2. The second element (The anion) end with "-ate ,  -ide ," etc

3. NO prefix is added while naming the first element.

For example : Bi2 can't be named as Dibismuth

Na2 = Can't be named as disodium

Hence the compound :

Bi2(CO3)3 contain two element : Bi and CO3. Here , Bi = cation (named as such) and CO3 = anion (named according to rules)

Bi = Bismuth

CO3 = carbonate

Bi2(CO3)3 = Bismuth Carbonate

The molecular mass of this compound is :

Molecular mass = 2 (mass of Bi) + 3(mass of C) + 6(mass of O)

= 2 (208.98)+3(12.01)+6(15.99)

= 597.987 u

5 0
3 years ago
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