3 years ago

Element definition in chemistry

1 answer:

5 0

An element is a substance made entirely from one type of atom. For example, the element hydrogen is made from atoms containing a single proton and a single electron.

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Atoms of two different elements must have different

kogti [31]

Answer:

C atomic number

Explanation:

As u go from left to right the atomic number changes

So C is the answer,

I took the test on edge and that was the answer

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3 years ago

All of the following are properties of bases except

poizon [28]

The answer is D slippery to the touch

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Both artists and scientists contribute to our understanding of the world around us. Identify the ways that

LUCKY_DIMON [66]

Answer:

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To three significant digit,what is the mass percentage of iron in the compound Fe2O3

svlad2 [7]

69.9%

Explanation:

To find the mass percentage of iron in the compound in Fe₂O₃, we would go ahead to express the given molar mass of the iron to that of the compound.

Mass percentage = $\frac{molar mass of Fe}{Molar mass of Fe_{2}O_{3} }$ x 100

Molar mass of Fe = 55.85g/mol

Molar mass of O = 16g/mol

Molar mass of Fe₂O₃ = 2(55.85) + 3(16) = 159.7‬g/mol

Mass percentage = $\frac{2(55.85)}{159.7} x 100$ = 69.94% = 69.9%

learn more:

Mass percentage brainly.com/question/8170905

#learnwithBrainly

4 0

2 years ago

Is my answer right?

Ahat [919]

Yes the answer is 1s22s22p63s23p64s23d5

7 0

3 years ago