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laila [671]
3 years ago
10

Solve the problem using dimensional analysis. Every number must have a unit. Work must be shown. Conversion factors are in the t

able.
Gold cost $8.00 per ounce. Determine how many grams you can purchase for $15.00.

Chemistry
1 answer:
DanielleElmas [232]3 years ago
8 0

Dimensional analysis is based on the principle that physical quantities that are equated must be represented in measures of the same basic quantities (e.g mass, length, or time) in order to draw conclusions about their relationships.

If Gold cost $8.00 per ounce

Then $15.00 will cost:

\mathbf{x = \dfrac{\$15.00 \times 1  \ ounce}{ \$ 8.00}}

x = 1.875 ounces

Assuming x to be the amount of ounce, then Gold of $15.00 will cost 1.875 ounces.

Now, given that:

1000g = 1kg

1 kg = 2.2 lbs

1 lb = 16 oz

Then, to determine the amount of gram that is equivalent to 1.875 ounces, we have:

Since 1 lb = 16 oz

2.2 lbs = (2.2*16) oz

= 35.2 oz

Since 1 kg = 2.2lbs = 35.02 oz

∴

x(g) =  1 kg

1000 g = 35.02 oz

1 (g) = 35.02/1000 oz

1 (g) = 0.03502 oz

Thus, If 1 (g) = 0.03502 oz

x(g) = 1.875 oz

\mathbf{x(g) = \dfrac{1.875 \ oz \times 1 \ g}{0.03502 \ oz}}

x  = 53.54 g

Thus, we can conclude that amount of the grams you can purchase for $15.00 is 53.54 grams

Learn more about dimensional analysis here:

brainly.com/question/18108995?referrer=searchResults

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GrogVix [38]

Answer : The mole fraction of NaCl in a mixture is, 0.360

Explanation : Given,

Moles of NaCl = 7.21 mole

Moles of KCl = 9.37 mole

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Now we have to calculate the mole fraction of NaCl.

\text{Mole fraction of }NaCl=\frac{\text{Moles of }NaCl}{\text{Moles of }NaCl+\text{Moles of }KCl+\text{Moles of }LiCl}

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\text{Mole fraction of }NaCl=\frac{7.21}{7.21+9.37+3.42}=0.360

Therefore, the mole fraction of NaCl in a mixture is, 0.360

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