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Could you clarify by "to what extent" and be more specific? Chemical formula is almost like the starting point to chemistry with the exception of elements, so you should be able to write them and interpret what it is when given to you (i.e. CO2 is a carbon and 2 oxygen atoms, it is carbon dioxide)
Naming chemical compounds and knowing their formula is one of the first things you learn in chemistry and is something that even precedes the high school review portion. The names might become more familiar to you as you use them more often during this course, but given the number of topics we must cover during the course there will not be time to go over in super detail over the naming. Thus, for the simple compounds and polyatomic ions you should try to learn them as soon as you can. If you need resources, you can refer back to Fundamentals sections B through D and seek help during office hours.
Kuldeep Gill 1H wrote:Hi, I was just wanted to know... to what extent should we know chemical formulas?
It is not necessary as he will provide us with the formula. However, I recommend knowing the chemical formulas for basic elements such as carbon, Hydrogen, Oxygen, Nitrogen, sulfur, and potassium because most chemical formulas will involve these elements.
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