Who discovered that a dense positively charged atomic nucleus is at the core of every atom? Ernest Rutherford Erwin Schrödinger Antoine Lavoisier John Dalton

What is the ionic charge for selenium

The solubility of KCl (s) in water depends on the (1) pressure on the solution (2) rate of stirring (3) size of the KCl sample (4) temperature of the water

A 13.97 g sample of nabr contains 22.34% na by mass. Considering the law of constant composition (definite proportions) how many grams of sodium does a 5.75 g sample of sodium bromide contain?

Which of the following is an example of pseudoscience? a) psychic experiences b) benefits of aspirin c) bacteria as a cause of disease d) existence of viruses

Why 1 mole of a gas (incompressible) contains 22400 ml of that substance?

Determine the empirical formula of the following compound: A 0.4987-g sample of a compound known to contain only carbon, hydrogen, and oxygen was burned in oxygen to yield 0.9267 g of carbon dioxide and 0.1897 g of water.

How many moles of NH3 from when 32.4 L of H2 gas completely reacts at STP according to the following reaction? Remember 1 mol of an ideal gas has a volume of 22.4 L at STP N₂ (g) + 3H₂ (g) →2NH₃ (g) ps: We have to not only give the answer which is 1.

At STP, how many moles of carbon dioxide will occupy 35.2 L of space?

Which of the following elements will likely form a negative ion in its ionic compounds?

Calculate the wavelength of the laser light for a) d = 1/500 mm and b) d = 1/1000 mm. Use the modified "grating equation" given below: nλ =