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Alex17521 [72]
2 years ago
6

Which group has eight valence electrons?

Chemistry
1 answer:
sesenic [268]2 years ago
3 0

Answer:

alkali metals is your answer

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You have 3.498 moles of the gas/neon
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Which pairing below does not correctly match the scientist with the contribution to the understanding of the atom? A. Proust and
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The same reaction is begun with an initial concentration of 0.05 M O3 and 0.02 M NO. Under these conditions, the reaction reache
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The balanced equation of the reaction is:

O3(g) + NO (g) → O2 (g) + NO2 (g)

Then the ratios of reaction is 1 mol O3 : 1 mol NO : 1 mol O2 : 1 mol NO2

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The by the stoichiometry 0.02 mol of O3 will be consumed in 8 seconds.

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Which quantity is constant when working with boyles, charles, and gay lussacs law?
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charles law states that the volume of a gas will increase as temp increases if the pressure remains constant.

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One method for preparing pure iron from Fe2O3 is by reaction with carbon monoxide.Fe2O3(s)+CO(g)→Fe(s)+CO2(g) How many moles of
larisa [96]

Answer:

The 2292 moles of CO are needed to react completely with 122 Kg of Fe₂O₃.

Explanation:

Given data:

Mass of Fe₂O₃ = 122 Kg ( 122×1000 =  122000 g)

Moles of CO = ?

Solution:

Chemical equation:

Fe₂O₃ + 3CO  → 2Fe + 3CO₂

Number of moles of  Fe₂O₃:

Number of moles = mass/ molar mass

Number of moles = 122000 g /159.69 g/mol

Number of moles = 764 mol

Now we will compare the moles of Fe₂O₃ with CO.

                               Fe₂O₃            :            CO  

                                  1                  :             3

                               764                :             3×764  =2292 mol

The 2292 moles of CO are needed to react completely with 122 Kg of Fe₂O₃.

6 0
3 years ago
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