The atomic symbols of nitrogen and oxygen are N and O, respectively. The chemical formula of a particular substance is NO2.
Which of the following is a correct description of the substance?
A. an element made up of 2 nitrogen atoms and 2 oxygen atoms
B. a compound made up of 1 nitrogen atom and 2 oxygen atoms
C. an element made up of 1 nitrogen atom and 1 oxygen atom
D. a compound made up of 2 nitrogen atoms and 2 oxygen atoms
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Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

How many grams of mgbr2 are needed to produce 75g or metal?