Casimir recently purchased an old car. he notices the rims have some spots of rust on them. so, he goes to an automotive shop and chooses a product that is recommended for removing rust. which acid is most likely to be found in the product?

Phosporic acid or hidrochloric acid.

Explanation: There are not options, but the two acids that i know are used to remove rust are:

Phosphoric acid "converts" the iron oxide (rust) into ferric phosphate, which you can scrape after and in this way remove the rust.

Hydrochloric acid is used in the steel industry to pickle" steel by removing rust or scale, but the hydrochloric acid can affect other metals, so you may need to be careful when utilizing it.

the answer is d. 4

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answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .