What is nitrogen state at 20 celcius

The atomic number tells you the number of what in one atom of an element?

A plant extract can be obtained with organic solvents such as acetone or ethyl alcohol, and is composed of plant pigments such as chlorophyll A and B, carotene, and xanthophylls.

What is chemical energy? a) the form of energy that we perceive with our eyes b) the energy of motion c) the energy that does work through chemical reactions

What is the arrhenius definition of a base?

A sample of water is mixed with a surfactant. What will most likely happen to the viscosity of the water? Explain your answer.

The molar mass of carbon is 12.01 g/mol. what is the mass of a 1.0 ' 109 carbon atoms?

The atomic mass oftitanium is 47.88 atomic mass units This atomic mass represents the 1) total mass of all the protons and neutrons in an atom of Ti 2) total mass of all the protons, neutrons, and electrons in an atom of Ti 3) weighted average mass

What does polar and nonpolar mean in science

Hydrogen is prepared commercially by the reaction of methane and water vapor at elevated temperatures.

What is the percent yield if 4.65 g of copper?