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Nadya [2.5K]
2 years ago
11

Chemical properties of potassium

Chemistry
1 answer:
tester [92]2 years ago
6 0
<span><span>Atomic number19 
</span><span>Atomic mass<span>39.0983g.mol -1
</span></span><span>Electronegativity according to Pauling0.8
</span><span>Density<span>0.86
 g.cm -3 at 0 °C
</span></span><span>Melting point <span>63.2 °C</span></span></span>
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How many grams of CO are needed to react with an excess of Fe 2 O 3 to produce 209.7 g Fe?
gavmur [86]

Answer:

Mass = 157.5 g

Explanation:

Given data:

Mass of CO needed  = ?

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Solution:

Chemical equation:

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Number of moles of Fe:

Number of moles = mass/ molar mass

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Number of moles = 3.75 mol

Now we will compare the moles of iron and carbon monoxide.

                               Fe            :              CO

                                 2            :              3

                                3.75         ;             3/2×3.75 = 5.625 mol

Mass of CO:

Mass = number of moles × molar mass

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2 years ago
What pressure will be exerted by 25 g of CO2 at temperature of 25°C and a volume of .50 L?
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P = 13.95 atm.L/ 0.50 L

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