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2 years ago

Why is it important to present your answers according to the marks allocated to assessment questions.

2 answers:

7 0

In this exercise we have to use the knowledge of complete answers to understand how the assessement questions as student to test their knowledge.

<h3>What are assessment questions?</h3>

Assessment questions are the questions given to a student to test their knowledge of what has been taught. In the introduction, avoid, to start your answer, expressions like “Initially”, “To begin”, “Firstly”: it is a redundancy, after all you are, in fact, starting your answer. So, start with the writing itself.

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WINSTONCH [101]2 years ago

6 0

Answer:

Effective assessment provides students with a sense of what they know and don't know about a subject. If done well, the feedback provided to students will indicate to them how to improve their performance. Assessments must clearly match the content, the nature of thinking, and the skills taught in a class.

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alexdok [17]

Answer:

Dylan paid a plumber $120 for 4 hours of labor. How much does the plumber charge per hour of labor?

$15 per hour

$30 per hour

$116 per hour

$480 per hour

Explanation:

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3 years ago

suppose that $\star(n) = \left\{n - 2, n + 2, 2n, \frac {n}{2}\right\}$. for example, $\star(6) = \{3,4,8,12\}$. for how many di

kondaur [170]

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dont know sorry

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2 years ago

Determine the empirical formula of a compound containing 47. 37 grams of carbon, 10. 59 grams of hydrogen, and 42. 04 grams of o

Effectus [21]

Considering the definition of empirical formula, the empirical formula is C₃H₈O₂ and the molecular formula is C₉H₂₄O₆.

<h3>Definition of empirical formula</h3>

The empirical formula is the simplest expression to represent a chemical compound, which indicates the elements that are present and the minimum proportion in whole numbers that exist between its atoms, that is, the subscripts of chemical formulas are reduced to the most integers. small as possible.

<h3>Empirical formula in this case</h3>

In this case, you have:

Carbon (C): 47.37 grams
Hydrogen (H): 10.59 grams
Oxygen (O): 42.04 grams

Then it is possible to calculate the number of moles of each atom in the molecule, taking into account the corresponding molar mass:

Carbon (C): $\frac{47.37 grams}{12 \frac{g}{mole} }$ = 3.95 moles
Hydrogen (H): $\frac{10.59 grams}{1 \frac{g}{mole} }$ = 10.59 moles
Oxygen (O): $\frac{42.04 grams}{16 \frac{g}{mole} }$ = 2.63 moles

The empirical formula must be expressed using whole number relationships, for this the numbers of moles are divided by the smallest result of those obtained. In this case:

Carbon (C): $\frac{3.95 moles}{2.63 moles }$ = 1.5
Hydrogen (H): $\frac{10.59 moles}{2.63 moles }$ = 4
Oxygen (O): $\frac{2.63 moles}{2.63 moles }$ = 1

Finally, since in the empirical formula the numbers of moles must be expressed in whole numbers, the ratio of atoms is multiplied by some number with which everything is obtained in simple whole numbers (in this case by 2):

Carbon (C): 1.5× 2= 3
Hydrogen (H): 4× 2= 8
Oxygen (O): 1× 2= 2

Therefore the C: H: O mole ratio is 3: 8: 2

Finally, the empirical formula is C₃H₈O₂.

<h3>Molecular formula</h3>

To obtain the molecular formula you must relate its molecular weight (PMc) with the molecular weight of the empirical formula (PMfe).

PMfe= PM (C₃H₈O₂)= 76 g/mole

The molar mass of the compound (PMc) was determined to be 228.276 g/mol. Dividing this mass PMc by the molar mass of the empirical formula PMfe gives:

228.276 g/mol ÷ 76 g/mole= 3

This means that in the molecular formula there are 3 unit formulas (empirical formulas), so it is necessary to multiply the number of all atoms by 3.

Then, the molecular formula is C₉H₂₄O₆.

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2 years ago

If you subtract 0. 3 from a certain number, add 0. 4 times the original number to the result, and then add another 2. 78, you'll

kodGreya [7K]

The orginal number is 0.8 hope this helps

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3 years ago

Refer to Figure 4.7.1 above. Which of the expressions in the figure is the Lagrangian

Arturiano [62]

Using the image attached. The option that shows the marginal rate of substitution is option b.

<h3>What is marginal rate of substitution?</h3>

The marginal rate of substitution (MRS) is known to be the number of a good that a consumer is said to be willing to take in when compared to another good, only if the new good is said to be equally satisfying.

The marginal rate of substitution (MRS) is also described as the rate in which a specific units of an item is said to be replaced by another only if by giving the same amount of satisfaction to its consumer.

Hence, The MRS concept tells about the association between the taking in of two goods or resources if consumers are said to make rational decisions.

Hence, the option that satisfy the above is option B. Therefore, Using the image attached. The option that shows the marginal rate of substitution is option b.

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1 year ago