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podryga [215]
2 years ago
5

A student needs 7.6 liters of a 0.18 molar solution for an experiment. How many grams of solute does the student need if the mol

ar mass of the solute is 22.71 g/mol? Round your answer to the nearest 0.01
Chemistry
1 answer:
bekas [8.4K]2 years ago
5 0

Answer:

31.07 g

Explanation:

First we <u>calculate how many moles of solute would there be in 7.6 liters of a 0.18 molar solution</u>, using the <em>definition of molarity</em>:

  • molarity = moles / volume
  • 0.18 M = moles / 7.6 L
  • moles = 1.368 mol

Now <u>we calculate the mass of 1.368 moles of solute</u>, using the <em>given molar mass</em>:

  • 1.368 mol * 22.71 g/mol = 31.07 g

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The following initial rate data are for the reaction of hypochlorite ion with iodide ion in 1M aqueous hydroxide solution: OCI+r
Vinil7 [7]

Answer:

Rate = k [OCl] [I]

Explanation:

OCI+r → or +CI

Experiment [OCI] M I(-M) Rate (M/s)2

1 3.48 x 10-3 5.05 x 10-3 1.34 x 10-3

2 3.48 x 10-3 1.01 x 10-2 2.68 x 10-3

3 6.97 x 10-3 5.05 x 10-3 2.68 x 10-3

4 6.97 x 10-3 1.01 x 10-2 5.36 x 10-3

The table above able shows how the rate of the reaction is affected by changes in concentrations of the reactants.

In experiments 1 and 3, the conc of iodine is constant, however the rate is doubled and so is the conc of OCl. This means that the reaction is in first order with OCl.

In experiments 3 and 4, the conc of OCl is constant, however the rate is doubled and so is the conc of lodine. This means that the reaction is in first order with I.

The rate law is given as;

Rate = k [OCl] [I]

5 0
2 years ago
The answer to the question?
Artemon [7]

Answer:

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5 0
2 years ago
What is the molar mass of water (H2O)?
Sidana [21]

Answer:

The molar mass is: 18.02 g/mol.

Explanation:

  • Mass of two moles of Hydrogen atoms (H2) = 2x 1 g/mol = 2 g/mol.
  • Mass of one mole of water (H2O) = 2 g/mol + 16 g/mol = 18 g/mol.

1 mole of Hydrogen= 1.01, so if we have 2 moles of it here, that would be 2.02.

1 mole of Oxygen (that's all we have here)= 16.00

Once you add the two together (2.02+16.00), you will get 18.02.

I hope this made sense! Have a great day!

3 0
2 years ago
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Answer:
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Explanation:
                   Those electron pairs which are being shared between two atoms in molecule are called as bonding pair electrons. While, those electron pairs which are not involved in bond formation and are not shared between two atoms are called as Non-Bonding electron pairs.
                   In molecule of Methanol as shown below, it can be seen that carbon atom is forming four bonds with three hydrogen atoms and one oxygen atom by sharing four electron pairs and oxygen is forming two bonds, one with carbon atom and one with hydrogen atom. There are two lone pair of electrons present on oxygen atom which are not taking part in and formation.</span>

8 0
3 years ago
What are three components that make a complete description of a location?
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Answer:

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