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vitfil [10]
3 years ago
14

3) Which pair of formulas represents the empirical formula and molecular

Chemistry
2 answers:
Alexxx [7]3 years ago
6 0

Answer:

The answer to your question is maybe letter D, but the last oxygen needs a number 6.

Explanation:

The empirical formula gives the actual elements that form part of a molecule but not the total numbers.

The molecular formula gives the total number of atoms of each element in a molecule.

We must factor the molecular formula to know if a formula is the empirical formula of that.

A.        CH₄    C₂H₆  =  2(CH₃)       these are not empirical molecular formulas

B.        CH₂O  C₄H₆O                     these are not empirical-molecular formulas      

C.        O₂        O₃                           these are not empirical-molecular formulas

D.        C₃H₄O₃   C₆H₈O                 these are not empirical-molecular formulas

                                                       the last oxygen needs a number 6 to be

                                                       the answer.

saw5 [17]3 years ago
6 0
D is the correct answer
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It takes 11.2 kj of energy to raise the temperature of 145 g of benzene from 22.0°c to 67.0°c. what is the specific heat of benz
Cloud [144]
We can use the heat equation,
Q = mcΔT 

where Q is the amount of energy transferred (J), m is the mass of the substance (kg), c is the specific heat (J g⁻¹ °C⁻¹) and ΔT is the temperature difference (°C).
Q = 11.2 kJ = 11200 J
m = <span>145 g
</span>c = ?
ΔT = (67 - 22) °C = 45 °C
By applying the formula,
11200 J = 145 g x c x 45 °C
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Hence, specific heat of benzene is 1.72 J g⁻¹ °C⁻¹.
7 0
3 years ago
What is the salt that is produced when calcium hydroxide (Ca(OH)2) reacts with sulfuric acid (H2SO4)? CaSH2Ca H2O CaSO4
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3 0
3 years ago
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the rate of disappearance of Br- at some moment in time was determined to be 3.5 x 10-4 M/s. What is the rate of appearance of B
ddd [48]

Answer:

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Explanation:

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Step 2: Establish the appropriate molar ratio

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Step 3: Calculate the rate of appearance of Br₂

The rate of disappearance of Br⁻ at some moment in time was determined to be 3.5 × 10⁻⁴ M/s. The rate of appearance of Br₂ is:

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Explanation:I hope it works for you.

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a is the correct answer .

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6 0
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