Which of the following is a homogenous mixture of two or more pure substances?
a. water
b. air
c. alcohol
d. oxygen

#2: you run a chromatogram of inks belonging to three crime suspects and from a ransom note. the inks resolve into the following numbers of spots: suspect a = 2, suspect b = 4, suspect c = 3, note = 5.

which suspect would you most likely bring in for questioning?

a. suspect a

b. suspect b

c. suspect c

d. none of the suspects

1. Air is a homogenous mixture of two or more pure substances. Air is a mixture of many gases and dust particles

Water and alcohol are compounds, while oxygen is an element

A single substance can be an element or compound. The element is a single substance that cannot be broken down anymore or the simplest substance.

While the compound is a single substance that is formed from a combination of two or more through chemical reactions and has a fixed ratio.

The mixture is a combination of two or more substances whose constituent properties do not change. The properties of the mixture component are not lost / unchanged as in compounds.

The mixture can be divided into a homogeneous mixture if the composition/ratio of each substance in the mixture is the same and heterogeneous mixture if the ratio of the composition of the substances is not the same in each place.

Mixtures can also be divided into solutions, suspensions, and colloids based mainly on the size of the particles

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2. D. none of the suspects that will be brought to be asked questions

Chromatography is one technique for separating mixtures into its constituent components based on the principle of stationary and mobile phases.

Generally used to separate ink is paper chromatography. Where the stationary phase is paper and the mobile phase is solvent/sample. The ink on the pen is a mixture of several dyes. The absorbed solvent will separate the ink dye into several spots that indicate the constituent components of the dye from the ink

The statement of the question states that the ink from the notes shows 5 spots while the ink from the suspect's pen is only 2 spots (suspect A), 4 spots (suspect B) and 3 spots (suspect C)

Thus there is no match, but that approaches the number 5 spots of the ink note is suspect B with 4 spots

A heterogeneous mixture

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a homogeneous mixture

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Paper Chromatography

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Keywords: a homogeneous mixture, Paper Chromatography

possibly, yes.

explanation:

the amount of sugar you take in is dangerously high, risk of heart disease, high risk of diabetes, and etc.

2b2t

explanation:

2b2t