10. The density of olive oil has an accepted value of 0.936 g/mL. A student places an empty graduated cylinder on each of two different lab balances and sets the balances to read zero. She pours 100mL of oil in each graduated cylinder and measures the mass three times. Balance 1 reads 94.3 grams, 94.1 grams and 94.4 grams. Balance 2 reads 93.2 grams. 93.9 grams and 92.8 grams. Which statement best explains the accuracy and precision of both balances?

answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.

the answer is d. matter from the air combined with the steel wool.