General Chemistry 5/15

Atomic Models: Dalton, J.J. Thomson, Rutherford, Bohr, Shrodinger, de Broglie, Chadwick.

Dalton's Theory: All matter is composed of indivisible atoms. An element is a type of matter composed of only one kind of atom. All atoms...

One atom of an unknown element is found to have a mass of 4.480 × 10−23g. What is the molar mass of

One atom of an unknown element is found to have a mass of 4.480 × 10^−23g. What is the molar mass of this element? Molar mass is measured...

Write the symbol for an ion with 8 protons, 9 neutrons, and 10 electrons

Write the symbol for an ion with 8 protons, 9 neutrons, and 10 electrons: Number of protons is equal to the atomic number and is unique...

How To Balance Chemical Equations? (Step By Step Guide)

A balanced chemical equation has the same number of atoms of each element on the left (reactant) and right (product) sides. We balance a...

Which compound is an Arrhenius base?(1) HCl (2) H3PO4(3) Ca(OH)2 (4) CH3COOH

January 2020 NY Regents Chemistry Exam 24 Which compound is an Arrhenius base? (1) HCl (2) H3PO4 (3) Ca(OH)2 (4) CH3COOH Solution: Table...

How To Calculate The Mass Percentages Of Elements In A Compound

How To Calculate The Mass Percentages Of Elements In A Compound Step 1: Find the molar mass of the compound using Periodic Table. Step 2:...

How To Find Limiting Reactant, Theoretical Yield And Amount Of Excess Reagent Left (with examples)

Table of Contents: How To Find Liming Reactant When Moles Are Given How To Find Liming Reactant When Grams Are Given How To Find...

3,321 views2 comments

If I add 45 grams of sodium chloride (NaCl) to 450 mL of water, what is the molality of this so

If I add 45 grams of sodium chloride (NaCl) to 450 mL of water. What is the molality of this solution? Solution: Molality = moles of...

What’s the molarity of a solution formed by adding water to 35 grams of copper (II) sulfate (CuSO4)

What’s the molarity of a solution formed by adding water to 35 grams of copper (II) sulfate (CuSO4) until you have a final volume of 750...

Calculate the solubility of the following compound in moles per liter: PbI2, Ksp = 1.4 x 10-8.A) 1.

Calculate the solubility of the following compound in moles per liter: PbI2, Ksp = 1.4 x 10^-8. A) 1.4 x 10^-8 M B) 0.0019 M C) 5.6 x...

Looking for Chemistry Tutoring?

I tutor all levels of chemistry including general and organic chemistry.