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Alex777 [14]
1 year ago
15

I need help with my homework.Calculate the number of formula units in: 41.5 grams CaBr2

Chemistry
1 answer:
lana66690 [7]1 year ago
5 0

Answer:

\text{ }1.25\times10^{23}\text{ formula units}

Explanation:

Here, we want to calculate the number of formula units in the given molecule

We start by getting the number of moles

To get the number of moles, we have to divide the mass given by the molar mass

The molar mass is the mass per mole

The molar mass of calcium bromide is 200 g/mol

Thus, we have the number of moles as follows:

\frac{41.5}{200}\text{ = 0.2075 mol}

The number of formula units in a mole is:

1\text{ mole = 6.02 }\times10^{22}\text{ formula units}

The number of formula units in 0.2075 mole will be:

0.2075\text{ }\times6.02\times10^{23}\text{ = }1.25\times10^{23}\text{ formula units}

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For the given options:

Option A:  KClO_4

This compound is formed by the combination of potassium, K^+ which is a metal and ClO_4^- ion which is a polyatomic ion. Thus, it will form an ionic compound.

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Option C:  H_2S

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m = 65.8 g

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Tf = 36.9°C

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Q = mCΔT

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Predict the splitting pattern for each of the labeled hydrogens in the following molecules. Assume that all coupling constants a
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Complete Question

The complete question is shown on the first uploaded image

Answer:

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According to that for molecule 1 as shown on the second uploaded image

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The IUPAC name is Butan-2-ol

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