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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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What is the mass, in grams, of one mole of any substance known as?
Elena-2011 [213]

Answer: molar mass

Explanation:

The molar mass of any substance is it's relative molecular mass expressed in grams. Hence, the relationship between molar mass of any substance and mass, in grams, of one mole of any substance is mathematically expressed as:

Number of moles =

(Mass in grams ➗ Molar mass)

Hence, the unit of molar mass is gram per mole (g/mol)

Thus, molar mass is the answer.

3 0
3 years ago
What is the predicted order of first ionization energies from highest to lowest for lithium (Li), sodium (Na), potassium (K), an
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Answer:

Rb > K > Na > Li

Explanation:

Ionization energy increases up the period and up the group.

From the periodic table, we can see that Li is the going to have the highest ionization energy and Rb is going to have the lowest.

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3 years ago
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Which species is most vulnerable to extinction raccoon or mountain gorilla
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How many moles of gas does it take to occupy 120 L at a pressure of 233 kPa and a temperature of 340 K?
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A would be correct have a nice day.


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