Which statement is correct? (

a. electrons of a neutral atom always equal the number of protons, (

b. neutrons always equal the number of protons, (

c. neutrons always equal the number of electrons, (

d. atomic weight is identical to atomic mass.

2.0L of hydrogen gas is mixed with 3.0L of nitrogen gas at STP in a rigid 5.0L vessel. A reaction occurs, producing ammonia gas NH3 and causing the pressure to change.

How is sublimation and deposition are alike

Bohr looked to improve upon Rutherford's model of the atom because Bohr thought that Rutherford's model: a. was totally incorrect b. needed to relocate the protons and neutrons c. was not stable because the electrons did not have set orbits d.

Two basic properties of the liquid phase

What is the ratio of molecules in: CH4 + 2O2 - > CO2 + 2H2O

The subatomic particle that has the least mass is the ...

Which two properties are used to define matter? has mass and conducts heat has buoyancy and volume has mass and takes up space conducts energy and has characteristic properties

Calculate the energy if 48.7 g of Al reacts in the following reaction. (Al = 26.98 g/mol) Fe2O3 (s) + 2 Al (s) →Al2O3 (s) + 2Fe (s) ∆Hrxn = - 852 kJ.

Which type of wave has a wave perpendicular to the disturbance? Surface Longitudinal Mechanical Tranverse

Caffeine's molecular formula is c8h10n4o2. the molar mass of caffeine is 194g/mol. what is the percentage of carbon in caffeine