What does an atomic number represent in an atom? 1. Number of protons 2. Number of electrons. 3. Number of neutrons. 4. Number of protrond and neutrons

In terms of temperature, pressure and volume, what is happening when a hot air balloon inflates?

Draw the major organic product formed when the compound shown below undergoes a reaction with (ch3) 2culi in diethyl ether, followed by aqueous acid.

a regular solid has a length of 28cm., a width of 16cm. and a total surface area of 1424cm squared. What is the total surface area of a similar rectangular solid with a length of 14cm.

What are the three functions of a backbone from a vertebrates

Calculate the number-average molecular weight of a random nitrile rubber [poly (acrylonitrile-butadiene) copolymer] in which the fraction of butadiene repeat units is 0.

Which of the following has the greatest mass, in grams? a. 1 atom of lead (Pb) b. 0.5 mol copper (Cu) atoms c. 0.3 mol gold (Au) atoms d. 25 atoms of mercury (Hg)

Which one is not a sedimentery rock a.) sandstone b.) limestone c.) quartz d. (coal

Which group is more reactive than the alkaline earth metals?

Why do you not want any of the water on the outside of the test tube to drip off into the calorimeter?

What is the mass of an original 5.60-gram sample of iron-53 that remains unchanged after 25.53 minutes?