Using the following data, determine the percent composition (by mass) of the NaCl (salt) in a binary mixture. The mass of the unknown binary mixture is 23.76g and the mass of the SiO2 (sand) alone is 15.01g. Record your answer to 3 significant figures, and include the percentage sign ('%'), or 'percent'.

The percent composition (by mass) of the NaCl (salt) in a binary mixture is 36.8%

Explanation:

Binary mixture is a mixture containing two components which are mixed together in any proportion and do not combine chemically with each other.

Mass of mixture=Mass of +Mass of = 23.76 g

Mass of = 15.01 g

Mass of = 23.76 g - 15.01 g =8.75 g

To calculate the mass percentage ,we use the formula:

Putting values in above equation, we get:

Thus the percent composition (by mass) of the NaCl (salt) in a binary mixture is 36.8%

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

it is the most commonly accepted one