Not exactly chemistry but ok.
Phó is one of the famous dish in Vietnamese Culture
Hence, the answer is Vietnamese Cuisine
The dissociation of calcium carbonate, CaCO3, to simpler compounds can be expressed as,
CaCO3 --> CaO + CO2
The precipitate is CaO and its amount is calculated through the difference which will give us the answer of 5.6 g.
Answer:
9
option d 9
pH of a 10^-5 M HCI solution is 9