Help me out here I don’t understand please :((((((, ppl srsly answer my questions a week later :/

Chemistry

2 answers:

kow [346]3 years ago

8 0

Answer:

2. For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number.

3. in fact, electron mass is so small that it is not counted in an atom's mass

Explanation:

lions [1.4K]3 years ago

3 0

You can calculate the mass number by finding the sum of the neutrons and protons. An electron is not counted when calculating mass because it is so small it is nearly massless.

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2KClO3 》》2KCl +3O2

C+ O2》》CO2

number of C moles

Required O2 moles (According to the mole ratio )

Relevant to the first equation, find the moles the KClO3, which is used to produce that amount of O2 moles

Now you can find the mass of KClO3

I mentioned the useful steps which can guide you to get the answer.

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