look up dmitri mendeleev and find out how he constructed the original periodic table. present at least three key concepts and how he used them.

Explain the principle of the distillation process?

Write out the nuclear energy configuration (energy configuration of protons and neutrons in the nucleus, nuclear orbitals) of Calcium-40 and use it to explain why Ca-40 is an exceptionally stable and the most common isotope of Ca.

10 KNO3 (s) + 8 C (s) +3 S (s) → 2 K2CO3 (s) + 3 K2SO4 (s) + 6 CO2 (g) + 5 N2 (g)   If 1000 g of KNO3, 9.308 g of carbon, and 12.938 g of sulfur are combined in a reaction chamber and allowed to react completely, what mass of carbon is left after the reaction is finished? Answer in grams.

using the equations provided, please help me figure out which of them goes to which problems which have also been provided

For some questions you will need to use the special periodic table attached in the images below! Treat Je, Qu, Ap, and Bg as NONMETALS! A) Enter the balanced chemical equation for the reaction of 2-bogusopropanoic acid with KOH. B) Enter the balanced equation for the ionization of 2-bogusopropanoic acid in water.

In the table below, there are descriptions of an experiment on samples of three different chemical elements. Decide whether the element is a metal or nonmetal, if you can. If there is not enough information to decide, choose can't decide in the third column. element description metal or nonmetal? Element 1 is a hard silvery-gray solid. Wires are fastened to each side of a 2 cm slab of it, and an ordinary household 9 V battery is hooked up so that it can feed electricity through the slab to an LED. The LED glows brightly. metal 1 nonmetal (can't decide) Element 2 is a moderately soft silvery-gray solid. A 5 cm × 5 cm square of it, only 1 mm thick, is pressed into a dish-shaped mold under high pressure. When the press is lifted up, the sample has been crushed to a powder. metal 2 nonmetal (can't decide) metal Element 3 is a moderately soft silvery-gray solid. A 5 cm x 5 cm square of it, only 1 mm thick, is twisted using two pairs of pliers, giving it a slight curve. 3 nonmetal (can't…

Give the noble gas shorthand notation (ex: [He] 2s2 2p1) for Br       Give the noble gas shorthand notation (ex: [He] 2s2 2p1) for Ca+2       Give the noble gas shorthand notation (ex: [He] 2s2 2p1) for Zn

Hydrazine, N2H4, can be used as fuel to orient and maneuver spacecraft. The energy used to do so is obtained by reacting the hydrazine with dinitrogen tetroxide to form nitrogen gas and water vapor. Write and balance the chemical equation for this reaction.The spy satellite US-193 had 453 kg of hydrazine on board when it was destroyed. What mass of dinitrogen tetroxide would have had to be on board in order to completely react with the hydrazine? This reaction is a redox reaction. Assign oxidation states to each atom in the reaction,identify what is oxidized, what is reduced, the oxidizing agent, and the reducing agent. Answer in full please.

A student used a piece of aluminum that had a mass of 2.583 grams, and treated according to the same procedure you used in this experiment.2 Al(s) + 2 KOH(aq) + 4 H2SO4(aq) + 22 H2O(l) → 2 KAl(SO4)2•12H2O(s) + 3 H2(g) What is the mass of Alum theoretically possible? (Hint – Use the molar mass of the alum calculated in question #1.)