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nydimaria [60]
3 years ago
6

Which of the following shows a periodic pattern?

Chemistry
1 answer:
kolbaska11 [484]3 years ago
4 0
Out of the following choices, the one that shows a periodic pattern is "the mother takes her medication everyday at 7." 
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Potassium ......................
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How many liters of air must react with 2500 mL of hexane in order for combustion to occur completely. The percentage of oxygen i
bagirrra123 [75]

Answer:

118750 ml

Explanation:

The chemical equation for complete combustion of hexane is given as;

2C6H14 + 19O2 → 12CO2 + 14H2O  

From the equation of the reaction;

2 mol of C6H14 reacts with 19 mol of O2

2 ml of C6H14 reacts with 19 ml of O2

2500 mL of C6H14 would react with x ml of O2

2 = 19

2500 = x

x = 2500 * 19 / 2 = 23750 ml

Since oxygen is 20% of air;

23750 = 20 / 100 * (Volume of air)

Volume of air = 23750 * 100 / 20 = 118750 ml

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Explanation:

your answer is Kelvin because it is the SI unit of temperature

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2 years ago
Compounds that have the exact same molecular formula but are arranged differently are<br> called?
Marysya12 [62]

Answer:

isomers

Explanation:

Compounds that have the same molecular formula but different chemical structures are called isomers. Remember isomerism is a property between a pair (or more) of molecules, i.e. a molecule is an isomer of another molecule.

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What is the mass of 0.5 moles of NaCl
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