Aconcentrated phosphoric acid solution is 85.5% h_3po_4 by mass and has a density of 1.69 g/ml at 25 degree c. what is the molarity of h_3po_4? a. 14.7 m b 0.166 c. 5.16 m d. 19.4 m e. 0.0516 m

a. 14.7 M

Explanation:

Given that :

is 85.5 % w/w in solution.  

It means that 85.5 g of the salt is present in 100 g of the solution.  

Mass of solution = 100 g  

Density = 1.69 g/mL

Volume of the solution = Mass / Density = 100 / 1.69 mL = 59.17 mL = 0.05917 L

Moles of can be calculated as:

Molar mass of =  97.994 g/mol

The formula for the calculation of moles is shown below:

Thus,

Moles = 0.8725 moles

Considering:

Molarity = moles/ Volume of solution = 0.8725 / 0.05917 = 14.7 M

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

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