How does a straight-chain alkane that has five carbon atoms differ from a cycloalkane that has five carbon atoms?
the straight-chain alkane has at least one double or triple bond, but the cycloalkane has only single bonds.
the straight-chain alkane has only single bonds, but the cycloalkane has at least one double or triple bond.
the straight-chain alkane has two more hydrogen atoms than the cycloalkane.
the straight-chain alkane has two fewer hydrogen atoms than the cycloalkane.

The straight-chain alkane has two more hydrogen atoms than the cycloalkane.

Explanation:

1(General chemical formula for straight-chain alkane

Given : Alkane with five carbon atoms

Chemical formula of the alkane will be

From the chemical formula, there are 12 hydrogen atoms in a given alkane.

2)General chemical formula for cycloalkanes

Given : Cycloalkane with five carbon atoms

Chemical formula of the cycloalkane will be

From the chemical formula, there are 10 hydrogen atoms in a given cycloalkane.

From both the chemical formulas we can say that straight-chain alkane has two more hydrogen atoms than the cycloalkane.

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g