Chemistry Answers

Use a periodic table to determine which of the following pairs of atoms are most likely to form an ionic compound when bonded.

Calcium (Ca) and Fluorine (F)

Chlorine (CI) and Bromine (Br)

Oxygen (O) and Carbon (C)

Hydrogen (H) and Carbon (C)

2. A 0.2719 g sample containing 𝐶𝑎𝐶𝑂3 reacted with 20.00 mL of 0.2254 M HCl. Given that HCl was excess. The excess HCl required exactly 20.00 mL of 0.1041 M NaOH to reach the end-point using phenolphthalein indicator.

Determine percentage purity of 𝐶𝑎𝐶𝑂3 in the sample. The reaction involved is

𝐶𝑎𝐶𝑂3(𝑠) + 2𝐻𝐶𝐼(𝑎𝑞) → 𝐶𝑎𝐶𝐼2(𝑎𝑞) + 2𝐻2O(l)

The titration reaction is

𝐻𝐶(𝑎𝑞) + NaOH(aq) 𝑁𝑎Cl(𝑎𝑞) + 𝐻2𝑂(l)

Calculate the molarity of the 19.60 g/L FeSO4(NH4)SO4.6H2O, standard

solution.

I’m one experiment 8.66g of NO is mixed with 5.03 g of O2 what is the limiting reactant

If 300cm³ of hydrogen diffused through a porous pot in 50seconds. How long will it take 500cm³of oxygen to diffuse through the same pot?

Hello. I want chemical properties of copper-nickel with the UNS number: 20400 and 10 90 copper-nickel. Are these two close? Is UNS number unique?

On complete combustion, 0.246 g of an organic compound gave 0.198 g of CO2 and 0.1014 g of H2O. What is the ratio of carbon and hydrogen atoms in the compound?

Provide at least two applications of Nuclear Chemistry in your respective Engineering Technology and explain each.

If you react 5.625 L of H2S in excess oxygen, how many grams of water will be produced

What is the percent composition of oxygen in H₂SO₃?