How many grams are in 4.5 moles of sodium

Boron has an average atomic mass of 10.81. One isotope of boron has a mass of 10.012938 and a relative abundance of 19.80 percent. The other isotope has a relative abundance of 80.20 percent.

An atom of the isotope sulfur-31 consists of how many protons, neutrons, and electrons? (p = proton, n = neutron, e = electron)

Which best defines a pioneer species? a species that enters an area and makes its own food a species that enters a community that is stable and balanced the first species to populate an uninhabited area the first species that eats other organisms in

It takes 5.0 J of heat in increase the temp of a sample by 10 degrees Celcius. If the mass is doubled, how much heat in joules will it take to increase the temp by 10.0 degrees. a. 50.0 Jb. 5.0 Jc. 10.0 Jd. 15.0 J

Ionic solids will most likely dissolve in (1) H2O (l), which is a polar solvent (2) H2O (l), which is a nonpolar solvent (3) CCl4 (l), which is a polar solid (4) CCl4 (l), which is a nonpolar solvent

Fish need at least 4 ppm dissolved o2 for survival. part a what is this concentration in mol/l?

How does a runoff get polluted.

Anatom that has lewer neutrons than protons and more electrons than protons is

Which can have either a positive charge or a negative charge when they are released during radioactive decay? A. alpha particles B. beta particles C. positrons D. photons

Which ionic compound is water soluble? A. cuS B. NH4NO3 C. SrSO4 D. ZnF