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bogdanovich [222]
3 years ago
9

What is the specific heat of silicon if the temperature of a 4.11 g sample of silicon

Chemistry
1 answer:
monitta3 years ago
4 0

Answer:

The right solution is "0.7107 J/g°C".

Explanation:

The given values are:

Mass,

m = 4.11 g

Temperature,

ΔT = 3.8°C

Heat,

Q = 11.1 J

The specific heat of silicon will be:

⇒  C=\frac{Q}{m \Delta T}

On substituting the values, we get

⇒      =\frac{11.1}{4.11\times 3.8}

⇒      =\frac{11.1}{15.618}

⇒      =0.7107 \ J/g^{\circ}C

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A chemist measures the amount of hydrogen gas produced during an experiment. She finds that 264. g of hydrogen gas is produced.
Lesechka [4]

Answer:

The answer is 130.953 g of hydrogen gas.

Explanation:

Hydrogen gas is formed by two atoms of hydrogen (H), so its molecular formula is H₂. We can calculate is molecular weight as the product of the molar mass of H (1.008 g/mol):

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Is this equation completely balanced? 2C8H8 + 25O2 8CO2 + 18H2O No, because the number of carbon, hydrogen & oxygen atoms on
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<span>So to make it clear let's break the equation down species by species and assess the number of each species on bothe sides of the equation:
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LHS:  C - 16                                           RHS:  C - 8
          H - 16                                                     H - 36
          O - 50                                                    O - 34

Thus based on that it is evident that the equation is not quite balanced.  This therefore means a "</span><span>No, because the number of carbon, hydrogen & oxygen atoms on both sides of the equation are not equal."

</span>The actual balance equation would be C₈H₈  +  10O₂   →   8CO₂ +  4H₂O
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