7. Identify and describe the simple laboratory techniques that you could use to separate the homogeneous and heterogeneous mixtures in the following cases.
a) A student has carried out a double-replacement reaction and wishes to separate the small
amount of precipitate from the rest of the reaction mixture.
b) A researcher has a solution of two liquids with different boiling points and wishes to separate
and retain the two liquids.
c) A researcher obtained a solid from filtration but it is wet from being rinsed with water. The
researcher wishes to dry the solid by removing the water.
d) A student wishes to separate the individual substances in ink from a water-washable marker.

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

The earth's moon is unusually large. two popular theories of the moon's origin include the "sister world" hypothesis, which states that the moon formed from the same materials as the earth, near enough to the earth that they fell into orbit around each other. a second theory is the "capture" hypothesis, in which the moon formed elsewhere in the solar system, and the earth's gravity pulled it into its orbit. studies of what the moon is made of indicate that some of its materials had to come from the earth or from the same area of the solar system where the earth had formed. at the same time, the moon does not contain much of the material that makes up the earth's core, so the moon could not have formed from the same materials as the earth. how do the two facts above affect the described theories of the moon's origin? a. they show that scientists will never agree on where the moon came from. b. they show that more experiments on moon formation need to be done. c. they show that no theory accounts for the existence of the moon. d. they show that neither theory is complete and entirely correct.

Adilute aqueous potassium nitrate solution is