i wear glasses and take chemistry. i often have to wear safety goggles in class, but when i wear them over my glasses, they feel so uncomfortable (not to mention they look ridiculous). i'm not so sure i want contacts because of the risk of infection and costs. what should i do?
pH: ((from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic). The formula for pH is simply: pH - log (H+ ions) Balance the equation - of putting Ba(OH)2 into H2O - and reverse the logarithmic function to determine how much ionic hydrogen is required. That will tell you how much of the Barium Hydroxide compound is required and hence the mass necessary to achieve the result.
You got a ticket, you gotta pay it and don't park in front of hydrants, one day you may find your car smashed because the fire department doesn't dick around moving it nicely if they need the hydrant.
