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2 years ago

What is the solution to the problem expressed to he correct number of significant figures? 12.0/7.11

Chemistry

1 answer:

Law Incorporation [45]2 years ago

6 0

Answer: The solution to the problem expressed to he correct number of significant figures is 1.69

Explanation:

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

The rule applied for multiplication and division is :

The least precise number determines the number of significant figures in the answer.

As 12.0 has 3 significant digits and 7.11 also has 3 significant digits, the answer would also contain 3 significant digits.

For $\frac{12.0}{7.11}=1.69$

Thus the solution to the problem expressed to he correct number of significant figures is 1.69

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How many molecules of XeF6 are formed from 12.9 L of F2 (at 298 K and 2.6 atm) according to 11) the following reaction? Assume t

ddd [48]

Answer:

#Molecules XeF₆ = 2.75 x 10²³ molecules XeF₆.

Explanation:

Given … Excess Xe + 12.9L F₂ @298K & 2.6Atm => ? molecules XeF₆

1. Convert 12.9L 298K & 2.6Atm to STP conditions so 22.4L/mole can be used to determine moles of F₂ used.

=> V(F₂ @ STP) = 12.6L(273K/298K)(2.6Atm/1.0Atm) = 30.7L F₂ @ STP

2. Calculate moles of F₂ used

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3. Calculate moles of XeF₆ produced from reaction ratios …

Xe + 3F₂ => XeF₆ => moles of XeF₆ = ⅓(moles F₂) = ⅓(1.372) moles XeF₆ = 0.4572 mole XeF₆

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=> #Molecules XeF₆ = 0.4572mole(6.02 x 10²³ molecules/mole)

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2 years ago

Match the condensed structural diagrams with the correct names

AleksAgata [21]

Answer:

Here's what I get

Explanation:

1. Names

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III. CH₃-COO-CH₂-CH₂-CH₃ = 47. propyl ethanoate

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