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algol [13]
2 years ago
8

Is fireworks a physical or a chemical change and why??

Chemistry
1 answer:
Elanso [62]2 years ago
7 0

Answer:

fireworks is a chemical change

Explanation:

Because during a chemical change, substances are changed into different substances. In different terms, the composition of the substance changes.

if this help u, please mark brainliest!

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Genetic engineers must modify eukaryotic genes so that they can be expressed in bacterial host cells. The DNA from a eukaryotic
denpristay [2]

Answer:

Bacterial genes contain no introns, so the cells, which lack splicing machinery, cannot express eukaryotic genes containing introns and exons. Mature eukaryotic mRNA, which has already been spliced, contains only exons, which, after they have been converted back to DNA, can be transcribed and translated by the bacteria.

Explanation:

7 0
3 years ago
Rank the following substances/solutions in order of lowest boiling point to highest boiling point where 1 has the lowest boiling
poizon [28]

Answer:

1) pure water

2) 0.75 m CaCl2

3) 1.0 m NaCl

4) 0.5 m KBr

5) 1.5 m glucose (C6H12O6)

Explanation:

Boiling point elevation is a colligative property. Coligative properties are properties that depend on the amount of solute present in the system. The boiling point of solvents increase due to the presence of solutes.

The boiling point elevation depends on the number of particles the solute forms in solution and the molality of the solute. The more the number of particles formed by the solute and the greater the molality of the solute, the greater the magnitude of boiling point elevation.

The order of decreasing hoping point elevation is;

1) 0.75 m CaCl2

2) 1.0 m NaCl

3) 0.5 m KBr

4) 1.5 m glucose (C6H12O6)

5 0
3 years ago
Can someone tell me the answer and how to do the problem?
Wittaler [7]

Answer:

is tht wht u want

Explanation:

1 grams Sodium is equal to 0.043497607849056 mole.

4 0
3 years ago
Pure water is an electrolytic solution. <br><br><br> True <br> False
dmitriy555 [2]
The answer to this is false. 
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4 years ago
A student mixes sugar and water until the sugar dissolves. This an example of a<br> HELP PLS !!
murzikaleks [220]

Answer:

The sugar water mix is a mixture.

6 0
3 years ago
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