Ok heres how you round decimals example if you have 1.5 you can increase it to 2 let me teach you a trick to do it easy 5 or more raise the score example 1.7 can round up to 2 and 4 or less let it rest example 1.3 you cant round that so it stays the same
So its pretty much like if your rounding reguraly but the only diffrience is that it had a decimal in it or a dot and you always have to remeber to round the big one first
PH can be calculated using the following equation pH = -log [H₃O⁺] for apple juice the hydronium /hydrogen ion concentration is 0.0003 pH = -log (0.0003) pH = 3.5 correct answer is C
For ammonia pH = -log (3.1 x 10⁻⁹) pH = 8.5 answer should be 8.5
