Potassium, k, has an atomic number of 19 and an atomic mass of 39 how many electrons does a neutral atom of K have?

How did kepler describe the planets' orbits

Ammonia is formed industrially by reacting nitrogen and hydrogen gases. how many liters of ammonia gas can be formed from 13.7 l of hydrogen gas at 93.0°c and a pressure of 40.0 kpa?

How many moles of Al are used to form 509.8 g of Al2O3?

The reaction between sucrose and water to produce fructose and glucose is first order / / overall. The data below shows the change in concentration of sucrose over time at 298 K.

Perform the following calculations then use the Molarity PhET simulation to check answers. What is the molarity of a 0.400 L solution containing 0.700 moles of Cobalt (II) Chloride? How many moles of Potassium Permanganate are in 350.0 mL of 0.

What is the independent and dependent variable for a dry ice experiment

a substance that undergoes a physical change like melting is still the same substance is it true or false

What is a polar molecule

A mixture of He He, N 2 N2, and Ar Ar has a pressure of 22.1 22.1 atm at 28.0 28.0 °C. If the partial pressure of He He is 2475 2475 torr and that of Ar Ar is 1049 1049 mm Hg, what is the partial pressure of N 2 N2?

Oceans make the temperaturs of nearby land more extreme ... True or false