Please help
What is the pH of substance which has a hydronium ion concentration of 5.4 x 10-9? And what type of substance is it?

(pH = -log[H3O+])

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius

What is a possible solutions of the x> 3?

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.