If I have a 32 fl oz os a solution that has 62% alcohol, how much of a solution of 91% alcohol do I need to add to get a final solution of 90% alcohol?

Answer : The amount of solution needed is, 97.3 fl oz

Explanation :

Let the amount of solution needed be, x

Thus, the equation will be:

By solving the expression, we get the value of 'x'.

Therefore, the amount of solution needed is, 97.3 fl oz

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

the answer for sodium is 0.186

the answer for rubidium is 0.251