What two substance are found in the greatest abundance among the major salts dissolved in sea water?

a. potassium and iron
b. nitrogen and chlorine
c. sodium and chlorine
d. magnesium and potassium

Sodium  and chlorine are the two substance that are found in abundance.

Explanation:

The sea water consist of several salts but the salt that we get the most is the sodium chloride(NaCl). Like other salts sodium chloride is also dissolved in water in form of ions. There are higher concentration of ions.

There are six abundant ions , they are chlorine, sulphate, sodium, magnesium, potassium and calcium. ninety nine percent of the sea water is covered with sea salts. But among the seven salts substances such as sodium and chlorine is found in abundant.

for this case, we must find the number of deaths per day of the year 2015, in automobile accidents, knowing that 32,400 people died.

knowing that the year 2015 had 365 days we have the following division:

where "x" represents the number of deaths per day.

rounding off we have:

approximately, 89 people per day died in 2015

answer:

89 people per day