How many neutrons does an atom of al-27 have? (hint: look at the periodic table for the atomic number aluminum (al) 13 14 27 40 aluminum has the atomic number of 13?

What is the mol of 8.50g of nh3

How do you cells know how to develop within a multicellular orgasm?

8. If the distance between the Earth and the Sun were increased, which change would occur? A) The apparent diameter of the Sun would decrease. B) The amount of insolation received by the Earth would increase.

1. What is an air mass? 1. a large body of air with the same temperature and moisture. 2. any kind of cloud that produces rain, sleet, snow, or hail. 3. a place where weather always changes in an extreme way.

A sample of argon gas has a volume of 73 mL at a pressure of 1.20 atm and a temperature of 112 degrees Celsius. What is the final volume of the gas, in mL, when the pressure and temperature of the gas sample are changed to. 55 atm and 75 degrees C.

Chemical reactions cause changes in: atoms molecules physical properties

How many moles are 1.806 x 10^24 atoms?

The path that an object is moving or facing

Compare How does the current model of the atom differ from J. J. Thomson's model?

An environmental change is occurring due to continents shifting and moving to different parts of Earth's surface. What kind of change is this?