How many miles will a car go on a 12.0 gallon tank that gets 40.0 mpg? (mpg 40.0 = 1 gallon)

The car will travel 480 miles when the tank has 12 gallons.

Explanation:

We are given that the car is moving with a speed of 40 miles/gallon.

We need to find the distance traveled by the car when the tank is filled with 12 gallons, we use unitary method.

In 1 gallon, the car is travelling 40 miles.

So, in 12 gallons, the car will travel miles

Hence, the car will travel 480 miles when the tank has 12 gallons.

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form() .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.