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slega [8]
3 years ago
15

Glycerol is a syrupy liquid often used in cosmetics and soaps. A 3.25-L sample of pure glycerol has a mass of 4.10 x 10 g.

Chemistry
1 answer:
Pavel [41]3 years ago
8 0

Explanation:

It is known that density is the amount of mass present in liter of solution or substance.

Mathematically,      Density = \frac{mass}{volume}

It is given that volume is 3.25 L and mass is 4.10 \times 10^{3} g. Hence, calculate the density of glycerol as follows.

                     Density = \frac{mass}{volume}

                                   = \frac{4.10 \times 10^{3} g}{3.25 L}

                                    = 1.26 \times 10^{3} g/L

As, 1 L = 1000 cm^{3}.

So,           1.26 \times 10^{3} g/L \times \frac{1000 cm^{3}}{1 L}

                 = 1260 \times 10^{6} g/cm^{3}    

Thus, we can conclude that the density of glycerol is 1260 \times 10^{6} g/cm^{3}.

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alekssr [168]

Explanation:

5 trial, had an average destiny of 7.40. g/cm

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3 years ago
Identify two sources of heat that melt rocks beneath Earth's surface.
elena55 [62]

Answer:

magma, melting

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A buffer is prepared by adding 300. 0 ml of 2. 0 mnaoh to 500. 0 ml of 2. 0 mch3cooh. what is the ph of this buffer? ka= 1. 8 10
Anton [14]

The Henderson-Hasselbalch equation can be used to determine the pH of the buffer from the pKa value. The pH of the buffer will be 4.75.

<h3>What is the Henderson-Hasselbalch equation?</h3>

Henderson-Hasselbalch equation is used to determine the value of pH of the buffer with the help of the acid disassociation constant.

Given,

Acid disassociation constant (ka) = 1. 8 10⁻⁵

Concentration of NaOH = 2.0 M

Concentration of CH₃COOH = 2.0 M

pKa value is calculated as,

pKa = -log Ka

pKa = - log (1. 8 x 10⁻⁵)

Substituting the value of pKa in the Henderson-Hasselbalch equation as

pH = - log (1. 8 x 10⁻⁵) + log [2.0] ÷ [2.0]

pH = - log (1. 8 x 10⁻⁵) + log [1]

= 4.745 + 0

= 4.75

Therefore, 4.75 is the pH of the buffer.

Learn more about the Henderson-Hasselbalch equation here:

brainly.com/question/27751586

#SPJ4

6 0
2 years ago
What are the oxidation numbers of the atoms in this reaction?
ipn [44]
A, B and D should be the ones you should check
8 0
4 years ago
The spontaneous intermingling of atoms among different substances is accomplished by_____. active transport energy combustion di
elixir [45]

Answer- The intermingling of atoms takes place the help of diffusion.

Explanation- There are two areas one has a higher concentration and the other has a lower concentration and a substance moves from higher to lower and the process happening is called diffusion.

Combustion is heating up of the substance hence does not have any intermingling atoms and energy transport also does not have any atoms mingling together hence diffusion is the correct option.

8 0
3 years ago
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