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sweet [91]
3 years ago
5

Name alkanes family from 20 - 50​

Chemistry
1 answer:
Anton [14]3 years ago
5 0

Answer:

calcium strontium barium radium

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A compound is composed of 85.6% Carbon and the rest is Hydrogen. The molecular mass of the compound is 42.078g/mol. What is the
s344n2d4d5 [400]

The molecular formula for the compound is  C_{3} H_{6}

<u>Explanation</u>:

As with all of these problems, we assume 100 g of an unknown compound.

And thus, we determine the elemental composition by the given percentages.

Moles of carbon = 85.64 / 12.011

                            = 7.13 mol.

Moles of hydrogen = 14.36 / 1.00794

                               = 14.25 mol.

There are 2 moles of hydrogen per mole of carbon. And thus the empirical formula is CH_{2}.

And molecular formula = n × (empirical formula)

Thus, 42.08 = n × (12.011 + 2 × 1.00794)

And thus n = 3, and molecular formula = C_{3} H_{6}

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3 years ago
Which condition is likely to result in the MOST competition?
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How many molecules of SO2 are in 2.45 g of SO2? (molar mass=64.06 g/mol). (Hint: you need to use your entire stoichiometry flow
Reil [10]
9.45 x10^25 molecules
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The following is what kind of reaction?<br> 2 CH4 +4 02 → 2 CO2 + 4H2O
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<u>It</u><u> </u><u>is</u><u> </u><u>a</u><u> </u><u>combustion</u><u> </u><u>reaction</u><u>.</u>

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A student has a mass of 90 kg what would his weight be on mars if the acceleration due to gravity is 3.7 ?
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Once we have the object's mass, we can find the weight by multiplying it by the gravitational force, which it is subject to. Being that Mars has a gravitational force of 3.7m/s2, we multiply the object's mass by this quantity to calculate an object's weight on mars.

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