Which of the soutions would have the HIGHEST hydrogen ion concentration?

Solution with a pH = 1

Solution with a pH = 12

Solution with a pH = 7

Solution with a pH = 9

Solution with a pH = 5

Solution with a pH = 1

Explanation:

So the pH equation is pH = -log[H+]. To get the [H+] (hydrogen ion concentration), you rearrange to get [H+] = 10^-pH.

Solution with a pH = 1 ,  [H+] = .1 M

Solution with a pH = 12 , [H+] = 1*10^-12 M

Solution with a pH = 7 ,  [H+] = 1*10^-7 M

Solution with a pH = 9 ,  [H+] = 1*10^-9 M

Solution with a pH = 5,  [H+] = 1*10^-5 M

Another way to get the a high hydrogen ion concentration means that the solution should be more acidic. The most acidic pH of the 5 solutions is the one with a pH = 1.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3