What is the difference between atomic mass and number?

Which of the following elements has the largest first ionization energy? Se Pb Cl Sb

Consider the exothermic reaction 4nh3 (g) + 5o2 (g) →4no (g) + 6h2o (g) calculate the standard heat of reaction, or δh∘rxn, for this reaction using the given data.

Bill dropped in to see Sarah. How long is it appropriate for him to stay? 15 minutes 30 minutes one hour

The force of a gas's outward push divided by the area of the walls of the container is the gas's

Some of the characteristics that make a good index fossil are: A. the organism lived over a wide area. B. They lived for long periods of time. C. They lived for fairly short periods of time. D. The organism was in abundance.

Predict at least two circumstances (outside influences) that would cause a system in equilibrium to change the concentrations of its reactants or products.,

How many atoms are there in 2.3 grams of H?

Which of the following would dissolve in water, and why? None of these substances would dissolve in water Candle wax, it is a nonpolar substance Motor oil, its primary IMF is London Dispersion Forces Acetic acid, it ionizes into ions when added to

Have a region surrounding the central area called

1. Simplify. | A. O 16 B. O C. 04 D. O