How do you calculate the percent by mass of an element in a compound?

1. Ethylene glycol, commonly used in antifreezes, contains only carbon, hydrogen, and oxygen. When a sample of it is combusted in air, a 23.46 g sample produces 20.42 g of water and 33.27 g of carbon dioxide. Determine its empirical formula.

6) Where are the electrons found?

Write the full ground state electron configuration of o2.

When liquid is poured through a filter

Be sure to answer all parts. Classify each nitrogen-containing functional group in the anesthetic lidocaine according to whether it is an amide, or a primary, secondary, or tertiary amine. h542140Functional group 1 is a (n).

Write the net ionic equation for the chemical reaction shown. Include physical states. HClO2 (aq) + NaOH (aq) ⟶H2O (l) + NaClO2 (aq)

Which if the following is an example of a stratovolcano?

There are five elements named for famous scientists on the periodic table

What character acids is that they react with metals to

The energy of a particular color of green light is 3.81*10-22 kJ/photon. The wavelength of this light is nanometers