Acetaldehyde and butanoic acid must have the same

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

Working with si (metric) units for each of the following commonly used measurements, indicate its symbol. liter gram milliliter kilogram meter centigram milligram centimeter kilometer second millimeter milliseconds

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.