Which one of the following is a solution?

question 21 options:

oxygen

salt water

sugar

chocolate chip cookies

which of the following is a compound?
sugar

chocolate chip cookies

oxygen

salt water

why is water considered a pure substance and not a mixture?

question 23 options:

water can be separated physically into hydrogen and oxygen.

water is clear.

water can be separated chemically into hydrogen and oxygen.

water is not a pure substance. it is a mixture.

how can a mixture of pigments be separated?

question 24 options:

filtration

crystallization

magnetic attraction

chromatography

Sulfuric acid is a polyprotic acid. write balanced chemical equations for the sequence of reactions that sulfuric acid can undergo when it's dissolved in water.

Astudent made the lewis dot diagram of a compound as shown. mg is written with two dots shown on its top. an o is written on each side of mg. each o has six dots around it. an arrow is shown from one dot on mg toward the vacant space around the o on the right. another arrow is shown from the other dot on mg toward the vacant space around the o on the left. the title of the art is students lewis dot model. what is the error in the lewis dot diagram? an o atom should transfer all its six electrons to mg because the formula is mgo. both electrons of mg should be transferred to one o atom because the formula is mgo. the electrons should be transferred from each o atom to mg because mg has fewer electrons. the number of dots around mg should be four because it has to transfer two electrons to each o.

Type the letter that represents the correct location for each particle type below. the neutron is found at __ the electron is found at __ the proton is found at __