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Kay [80]
3 years ago
14

Which of the following separation methods is used to separate plant pigments?

Chemistry
2 answers:
stira [4]3 years ago
5 0
<span>Chromatography is the technique used to separate mixtures into the components that make up those mixtures. In chromatography the different pigments are separated into bands of pigment through their differences in intermolecular forces.</span>
anastassius [24]3 years ago
4 0

Answer: chromatography

Explanation:

Chromatography : It is a type of separation process in which the liquid or gas is separated into components at different rate. The principle of chromatography is that the substance of molecule are distributed between the liquid phases. It involves a stationary and a mobile phase.  Hence,chromatography is a laboratory technique that is used to  separate plant pigments.

Distillation : It is a type of separation process in which the mixture of liquid separated or evaporated at different temperatures.

Fractional distillation is separation of a liquid mixture into fractions which differ in boiling points by means of distillation by use of a fractionating column.

Filtration : It is a type of mechanical separation process in which the solid is separated from the liquid through the filter paper.

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It is from least to greatest

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A circuit includes a 220 resistor connected in series with two parallel resistors with values of 120 and 300. Whats the total ci
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For parallel resistors:
\frac{1}{r }  =  \frac{1}{120}  +  \frac{1}{300}
equivalent resistance: 85.7 ohms

for total circuit:
85.7 + 220 = 305.7ohms

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4 years ago
4. What is the SI unit for mass
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Answer: Mass is both a property of a physical body and a measure of its resistance to acceleration (rate of change of velocity with respect to time) when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies.

Explanation: This what I could come up with. Hope this helps !!

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3 years ago
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A thermometer is in a beaker of water. Which statement best explains why the thermometer reading initially increases when LiBr(s
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8 0
3 years ago
Gallium is produced by the electrolysis of a solution obtained by dissolving gallium oxide in concentrated NaOH(aq). Calculate t
Alina [70]

<u>Answer:</u> The mass of gallium produced by the electrolysis is 0.0354 grams.

<u>Explanation:</u>

The equation for the deposition of Ga(s) from Ga(III) solution follows:

Ga^{3+}(aq.)+3e^-\rightarrow Ga(s)

  • To calculate the total charge, we use the equation:

C=I\times t

where,

C = charge

I = current = 0.490 A

t = time required (in seconds) = 50\times 60=300s    (Conversion factor: 1 min = 60 s)

Putting values in above equation, we get:

C=0.490\times 300=147C

  • To calculate the moles of electrons, we use the equation:

\text{Moles of electrons}=\frac{C}{F}

where,

C = charge = 147 C

F = Faradays constant = 96500

\text{Moles of electrons}=\frac{147}{96500}=1.52\times 10^{-3}mol

  • Now, to calculate the moles of gallium, we use the equation:

\text{Moles of Gallium}=\frac{\text{Moles of electrons}}{n}

where,

n = number of electrons transferred = 3

Putting values in above equation, we get:

\text{Moles of Gallium}=\frac{1.52\times 10^{-3}}{3}=5.077\times 10^{-4}mol

  • To calculate the mass of gallium, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Moles of Gallium = 5.077\times 10^{-4}mol

Molar mass of Gallium = 69.72 g/mol

Putting values in above equation, we get:

5.077\times 10^{-4}mol=\frac{\text{Mass of Gallium}}{69.72g/mol}\\\\\text{Mass of Gallium}=0.0354g

Hence, the mass of gallium produced by the electrolysis is 0.0354 grams.

8 0
3 years ago
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