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3 years ago

What is the mass, in grams, of 28.58 mL of acetone?

2 answers:

7 0

If you look up the density of Acetone (Propanone in IUPAC names) you will find it is 0.7925g/cm3. This is the same as 0.7925g/ml.

You can calculate mass using the equation:- mass = density x volume
In your example mass = 0.7925 x 28.40 = 22.51g
I think That's right. Hope this helps!!! Good luck!

mario62 [17]3 years ago

7 0

Answer:

22.46 g

Explanation:

For this conversion you will need the density of the substance, which formula is:

Density = mass / volume

So, clearing the mass in the equation we have:

Mass = Density x volume

As the density is a characteristic property of each substance, you can search its value in the data sheet of the substance, so you just need to replace the values in the equation. If you have that the density is 0.7857g/mL the mass will be:

Mass = (0.7857g/mL)(28.58 mL) = 22.46 g

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Although not usually soluble in plain water, an amphoteric oxide or hydroxide is: 1. soluble in neutral solutions. 2. soluble in

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Answer:

The correct option is: 4. soluble in both acidic and basic solutions

Explanation:

Oxide is a chemical compound formed by an element with oxygen. In such compounds, the oxygen is generally present in the -2 oxidation state.

Whereas, hydroxide is a chemical compound formed by an element with hydroxyl group (-OH).

Oxides and hydroxides of some elements are amphoteric in nature. Such compounds can behave as an acid in basic medium and behave as a base in acidic medium.

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3 years ago

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Thomson
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3 years ago

A chemist prepares a solution of iron chloride by measuring out of into a volumetric flask and filling to the mark with distille

myrzilka [38]

Complete Question:

A chemist prepares a solution of iron chloride by measuring out 0.10 g of FeCl2 into a 50. mL volumetric flask and filling to the mark with distilled water. Calculate the molarity of anions in the chemist's solution.

Answer:

[Fe+] = 0.0156 M

[Cl-] = 0.0316 M

Explanation:

The molar mass of iron chloride is 126.75 g/mol, thus, the number of moles presented in 0.10 g of it is:

n = mass/molar mass

n = 0.10/126.75

n = 7.89x10⁻⁴ mol

In a solution, it will dissociate to form:

FeCl2 -> Fe+ + 2Cl-

So, the stoichiometry is 1:1:2, and the number of moles of the ions formed are:

nFe+ = 7.89x10⁻⁴ mol

nCl- = 2*7.89x10⁻⁴ = 1.58x10⁻³ mol

The molarity is the number of moles divided by the solution volume, in L (50.0 mL = 0.05 L):

[Fe+] = 7.89x10⁻⁴/0.05 = 0.0156 M

[Cl-] = 1.58x10⁻³/0.05 = 0.0316 M

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3 years ago