Is the Zeff of an element always equal to the number of valence electrons?

The forces between water molecules are stronger than the forces between ethanol molecules. which illiquid would probably be most difficult for an insect to walk on?

A worker is exposed to the following airborne concentrations of ethylbenzene: 8:00 - 10:00 125 ppm 10:15 - 12:15 88 ppm 12:45 - 3:15 112 ppm 3:30 - 5:00 70 ppm What is the 8-hour TWA exposure for the employee (calculate the exposure) ?

The nutrition label on a bottle of cola reports that a 8.0 fl oz serving contains 34 g of sugar. how many kilograms of sugar are in a 2.0 l bottle of cola

What is the volume in liters of a cube whose edge is 4.33 cm long?

Which quantity gives the best indication of the relative strength of the hydrogen bonds between the molecules in liquid hydrogen halides?

Describe a proton, neutron, and electron. Where are these particles located inside an atom.

A sample of gas is at 273°K and 2.00 atm with a volume of 6.00 liters. When the gas is compressed to 3.00 liters and the pressure increases to 3.00 atm, what is the new temperature of the sample?

Which oxygen pachages materials and distributed them throughout the cell

How many atoms in 3 mol zn

Isotopes: are atoms of different elements which have the same mass are atoms of the same element with equal numbers of neutrons are atoms of the same element with different numbers of neutrons are atoms of the same element with equal numbers of