The atomic number of re is 75. the atomic mass of one of its isotopes is 186. how many neutrons are in an atom of this isotope?

a. 186

b. 111

c. 261

d. 75

The Haber process produces ammonia commercially. It is represented by the equation N2 (g) 3H2 (g) - -> 2NH3 (g) To completely convert 9.0 mol hydrogen gas to ammonia gas, how many moles of nitrogen are required

The common thread among the definitions of cohesion is that cohesion is made up of what two basic dimensions?

Calculate the molarity of the solutions described below. A. 10.0 g of sodium chloride is dissolved in 2.0 L of solution. B. 52.5 g of sugar (C12H22O11) s dissolved in 1.0 L of solution. C. 120 g of aluminum sulfate is dissolved in 10.0 L of solution.

The is one kind of particle that makes up the atom and carries a positive charge. The neutron makes up for "missing mass" and is found in the nucleus. The third kind of particle carries a charge and has almost no mass. a electron, negative b.

Why are rift zones common places for igneous rock to form

How can a chemical reaction be slowed down?

The atomic number of an element is always the same as ___ A. The number of electrons B. The number of protons C. The number of neutrons D. The number of protons plus neutrons

Covalent bonds are formed when electrons are

Complete the chart. (Remember to enter a "0" if necessary.) Atomic Number: 3 1s: 2s: 2p: 3s: 3p: 4s: 3d: 4p: 5s:

How many water molecules are in 2.25 mol of water?