Answer:
1.89 × 10^-11 M
Explanation:
Recall that;
[H^+] [OH^-] = 1 × 10^-14
[H^+] = concentration of hydronium ions
[OH^-] = concentration of hydroxide ion
Where [OH^-] = 5.3 × 10−4 M
[H^+]= 1 × 10^-14/5.3 × 10−4
[H^+]= 1.89 × 10^-11 M
Answer:
3 cm3
Explanation:
1 L = 1 dm3 = 1000 mL (or 10^3 mL)
1 dm = 10 cm
1 dm3 = 10^3 cm
==> 1 mL = 1 cm3
Therefore, 3 cm3 = 3 mL
Yes that is true because physical changes change the shape or size of the objects but it is still in the same form. Chemical changes change the item completley. Please give brainliest, thank you and have a blessed day
<span>Phenolphthalein is chemical compount. It becomes colorless when it is immersed in acidic solution and pink when immersed in basic solution.
(1) CH3OH(aq) - Methanol. It is a weak acid but has basic properties too.
(3) CH3COOH(aq) - </span>hydrated acetic acid<span>
(2) Ca(OH)2(aq) - </span>Calcium hydroxide or lime water. Basic solution<span>
(4) HNO3(aq) - </span><span>Nitric acid
Phenolpthalein becomes pink in 0.01M of </span><span>2) Ca(OH)2(aq) solution.</span>