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Amiraneli [1.4K]
3 years ago
13

To convert between moles and molecules, you need to...

Chemistry
1 answer:
Kobotan [32]3 years ago
6 0
 i bief it is d. halp you at all
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A sealed flask contains 1.3 x 10^25 molecules of CO2. How many moles of CO2 are in the flask?
GenaCL600 [577]
A mole of anything contains 6.022x10^23 items. so we need to divide this

1.3 x 10^25 / 6.022 x 10^23 = 21.59 moles
8 0
3 years ago
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How many moles of zinc are in 4.70 kg of zinc?
faust18 [17]
First we convert kg to g
1kg =1000g
4.70=x(gram)
4.70×1000÷1=4700g
now:
number of moles=mass÷molarmass
number of moles=4700÷65.4
number of moles=71.86moles.
6 0
3 years ago
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Why does burned toast taste so bad? Is it a chemical or physical change?
german

Because things that are burnt have been changed into something else like moldy bread thats cooked.

It is chemical change because you cannot unburn something.

4 0
3 years ago
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Calculate the density of carbon dioxide at STP
Artist 52 [7]

Answer:

Density = mass/volume

= 44/22.4

= 1.96 gram/liter

The density of the Carbon Dioxide at S.T.P. (Standard Temperature and Volume) is 1.96 gram/liter.

5 0
3 years ago
13. Fill in the following table
Mandarinka [93]

Answer:

Potassium Bromide = KBr

Nitrogen dioxide = NO₂

Lithium oxide = Li₂O

Explanation:

Potassium Bromide (KBr)

4 0
3 years ago
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