Chemical formula table
Substance Formula/Symbol
Iron Fe
Sodium chloride NaCl
Carbon dioxide CO2
Aluminum Al

The table lists the chemical formulas or symbols of a few common substances. Which two substances are compounds?

A) aluminum and iron
B) iron and sodium chloride
C) carbon dioxide and aluminum
D) sodium chloride and carbon dioxide

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.

37.0 °c = °f (human body normal temperature)

What does a numerical subscript following an element in a chemical formula mean?