Which of the following elements has an atomic mass of 14?

N, O, Si, V

A reaction produces 10.5 L if oxygen, but was supposed to produce 1 mol of oxygen. What is the percent yield? (One mole of any gas occupies 22.4 L under certain conditions of temperature and pressure. Assume those conditions for this question)

Write a balanced equation for the combustion of gaseous benzene (c6h6), a natural constituent of crude oil, in which it combines with gaseous oxygen to form gaseous carbon dioxide and gaseous water.

Place the following substances in order of pH from lowest pH to highest. A. neutral compounds, bases, acids B. acids, neutral compounds, bases C. bases, acids, neutral compounds D. bases, neutral compounds, acids

Balance the following reaction. Leave the box empty if no other coefficient is needed. C2H5 + O2 → CO2 + H2O

Based on the balanced equation, the molar ratio of CuCl2 to Al should be

What type of radiation wave from the Sun does this graphic display? answer choices: x rays microwave visible ray infrared ray

What is the charge associated with each side of the HCl molecule?

Neon is a gas made up of one type of atom. Which term best describes neon? A) molecule B) element C) compound D) mixture

When the liquid is poured through a fliter,

A student went to the dentist and found out that he had a cavity. He always brushes his teeth twice a day, so he didn't understand how he got a cavity.