What isotope has 14 protons and 14 neutrons?

2 Ca + O2 = 2 CaO 50g Ca used what is the grams of CaO?

A three level system has energies ε0=0.00J, ε1=5.00x10-21J, and ε2=10.0x10-21J. a. Using the Boltzmann Distribution Law, calcuate the molar internal energy U at T=10.0K.

A 78 gram sample of uranium loses half of its mass each year. how much is left after 6 years?

Which state of matter has atomic spacing that is close together and definite shape? gas liquid solid plasma none of the above

Scientists have correlated average global temperature with atmospheric carbon dioxide levels for the last 160,000 years using ice cores from Antarctica. How is the carbon dioxide level determined? A.

The line of longitude used as the origin in a system of coordinates

In the ground state, has only 1 electron in a p orbital. A. carbon B. fluorine C. hydrogen D. nitrogen E. aluminum

Which of the following is a mixture? alcohol water mercury ink

A gas occupies 3.5 L at standard pressure. Find the volume of the gas when the pressure is 1.5 atm.

What is the temperature (in K) of 16.45 moles of methane gas in a 4.95 L container at 4.68 atm?