What is the mass of oxygen in 10.0 g of water?

In the laboratory you dissolve 15.9 g of barium chloride in a volumetric flask and add water to a total volume of 375 ml. what i

ASHA 777 [7]

There are a number of ways to express concentration of a solution. This includes molarity. Molarity is expressed as the number of moles of solute per volume of the solution. So, we calculate as follows:

Molarity = 15.9 g BaCl2 ( 1 mol / 208.23 g ) / .375 L = 0.204 mol / L

5 0

3 years ago

More strong base is added until the equivalence point is reached. what is the ph of this solution at the equivalence point if th

Vlad [161]

A more strong base is added until the equivalence point is reached. The ph of this solution at the equivalence point if the total volume is 57. 0 mill is 9.8

The potential of Hydrogen is what pH is formally known as. The negative logarithm of the concentration of H+ ions is known as pH. Thus, the definition of pH as the amount of hydrogen is provided. The hydrogen ion concentration in a solution is described by the pH scale, which also serves as a gauge for the solution's acidity or basicity.

The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality. Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7. In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water.

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7 0

1 year ago

Write the chemical equation for hbro reacting with water. what are the products? do you expect to have any hbro molecules left i

Vinil7 [7]

1) HOBr stands for hypobromous acid. On reacting with water, products formed are OBr- and H3O+. Following reaction occurs during this process.

 HOBr + H2O ⇄ OBr- + H3O+

2) HOBr is a weak acid and have a lower value of dissociation constant (Ka ~ 2.3 X 10^–9). Hence, large number of undissociated HOBr molecules are left in solution, when the reaction is completed/reaches equilibrium.

6 0

3 years ago

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A flask with a volume of 125.0 mL contains air with a density of 1.228 g/L. What is the mass of the air contained in the flask?

UNO [17]

0.1535g is the mass of the air contained in the flask.

A substance's density is defined as its mass per unit of volume. Density is most frequently represented by the symbol, however Latin letter D may also be used. Mass divided by volume is the formula for density in mathematics: ρ = M/V. where m is the mass, V is the volume, and ρ is the density.

The given are:

1. Mass = ?

2. Density = 1.228 g/L

3. Volume = 125mL to L

Plugging in the values we get,

ρ = M/V

1.228 = M/ 0.125

M = 0.1535g

Therefore, 0.1535g is the mass of the air contained in the flask.

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6 0

1 year ago

How many signals would you expect to find in the 1h nmr spectrum of 1 butanol?

guajiro [1.7K]

The ¹H-NMR of 1-Butanol is shown below,

There are Five signals found in the proton NMR spectrum of 1-Butanol.

A Broad Singlet signal at ≈ 4.7 ppm (Down Field = More Deshielded) is for proton directly attached to Oxygen atom.

Triplet Signal at ≈ 3.65 ppm (Down Field = Deshielded) is for methylene group directly attached to Oxygen atom.

Multiplet Signal at ≈ 1.6 ppm is for methylene which is present between two methylene groups. The shielding effect is increasing as moving away from Oxygen atom.

Multiplet Signal at ≈ 1.4 ppm is for methylene which is present between terminal methyl and methylene groups. The shielding effect is increasing as moving away from Oxygen atom.

Triplet Signal at ≈ 0.9 ppm (Up Field = Most Shielded) is for terminal methyl group attached to methylene group.

Result:
Five Signals are found in the ¹H-NMR of 1-Butanol.

4 0

3 years ago