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2 years ago

In the formula for carbon tetrahydride, CH4, the percent composition of all elements is:

Chemistry

2 answers:

creativ13 [48]2 years ago

8 0

C%=12/16*100=3/4*100=75%
H%=25%

Nostrana [21]2 years ago

3 0

Answer:

The percentage composition if carbon tetrahydride is 75% of carbon and 25% of hydrogen.

Explanation:

Molecular mass of carbon tetrahydride = 16 g/mol

Atomic mass of carbon = 12 g/mol

Atomic mass of hydrogen atom = 1 g/mol

Percentage of an element in a compound:

$\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{molecular mass of element}}\times 100$

Percentage of carbon:

$\frac{1\times 12 g/mol}{16 g/mol}\times 100=75\%$

Percentage of hydrogen:

$\frac{4\times 1g/mol}{16 g/mol}\times 100=25\%$

The percentage composition if carbon tetrahydride is 75% of carbon and 25% of hydrogen.

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2 years ago

Consider the following reaction. SO2Cl2 → SO2 + Cl2. After collecting experimental data you found that plotting ln[SO2Cl2] vs. t

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Answer:

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Explanation:

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It is a linear form of the integrated first-order law equation:

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$k = 0.000290 s^{-1}$

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$ln[SO_2Cl_2]_o = -2.30$

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2 years ago

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mote1985 [20]

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2 years ago

Read 2 more answers

Rate = K[A]

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Answer:

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Explanation:

Data:

k = 1 × 10⁻³ L·mol⁻¹s⁻¹

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Calculation:

rate = k[A]² = 1 × 10⁻³ L·mol⁻¹s⁻¹ × (3 mol·L⁻¹)² = 9 × 10⁻³ mol·L⁻¹s⁻¹

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2 years ago

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