3 years ago

Which of the following elements is not diatomic?

Chemistry

1 answer:

KATRIN_1 [288]3 years ago

8 0

Answer:

Neon

Explanation:

Elements from group 8A stay alone

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A radioactive nucleus emits a beta particle, then the parent and daughter nuclei are

Nana76 [90]

Answer:

isobars

Explanation:

How?

A radioactive nucleus emits beta particle(Like uranium,radium)
So the mass numbers are same for daughter nuclei .
They have different atomic numbes .

So they are isobars

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2 years ago

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299792458 m/s in scientific notation

erastova [34]

2.998e^8 is how I would write it. If you want it with the least amount of decimals, use 3e^8

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3 years ago

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liq [111]

Probably a cell wall

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2 years ago

How can I calculate the mass percent of carbon, nitrogen and oxygen in caffeine, C8H10N4O2.

Ahat [919]

You must first calculate the total weight of 1 mole of the substance. You do this by finding the molar weights on the periodic table of each of the elements in the compound:

$8(12.01g)+10(1.008g)+4(14.007g)+2(15.999g)=96.08g+10.08g+56.028g+31.998g=194.186g$

So now we take the amount of each element that is given in the compound and divide it by the total mass of the compound:

Carbon: 96.08g

$\frac{96.08g}{194.186g}= 0.49478=49.48$

Carbon = 49.48%

Nitrogen: 56.028g

$\frac{56.028g}{194.186g}=0.28853=28.85$

Nitrogen = 28.85%

Oxygen: 31.998g

$\frac{31.998g}{194.186g} =0.16478=16.48$

Oxygen = 16.48%

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2 years ago

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Balance the following equation:

Sonbull [250]

You only need a 2 at the end In front of the NaCl

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