_17. Calculate the mass of hydrogen needed to produce 220 g of water] a, 247 g H
b.24gH
c.4.89 gH
d. 122 g H

i believe it is a.) released into

explanation:

it's c. elements are placed in rows based on how may valencies electrons have.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

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