Inorganic Chemistry Answers

Five hundred (500) milliliters of aqueous solution contains thirty (30) milligrams of zinc nitrate (Zn(N03)2 . The density of the aqueous solution is 1 gram per milliliter (1 g/ml). The atomic masses : Zn = 65.39 , N = 14.00674 , O = 15.994 , Compute for the concentration of zinc nitrate in the aqueous solution in terms of mass fraction (mi), parts per million (ppm), parts per billion (ppb), parts per trillion (ppt), milligrams per liter (m/l) and Molarity (M).

0.5M potassium hydroxide solution is needed in the qualitative determination of anthraquinone glycosides in plants. what is the moles of solute

How many ammonia molecules are there in 0.50 ammonia moles? Overall, are these nitrogen and hydrogen atoms present?

Write balanced molecular equations for the following reactions in aqueous solution:

a) calcium + water à calcium hydroxide + hydrogen

b) barium chloride + sodium barium à sulfate sulfate + sodium chloride

In a Daniell stack the following redox reaction occurs:

Zn(s) + ^Cu2+(aq) à Zn2⁺⁽aq) + Cu(s)

a) write the oxidation and reduction semi-reactions , also indicating the electrons at stake and the oxidation numbers of the reactants and products.

b) what reaction would take place in an electrolytic cell? 

Determine the moles of solute particles dissolved in 1.0 Kg of water, for the following solutions:

a) CH₃CH₂OH, 2.0 m; b) KCl, 2.5 m; c) Al₂(SO₄)₃, 1.0 m; d) C₁₂H₂₂O₁₁ (saccarosio), 3.0 m; e) HNO₃, 2.0 m

Does following compound are stable compounds of transition elements? Give reason for your answer.

CrCl6 MnCl7

Approximately 100 g of PbCl4 reacted excess NH4Cl according to the following equation: PbCl4 + 2 NH4Cl → (NH4)2PbCl6. If the yield was 87.0%, how many grams of product were obtained?

please include calculations

The metal used to recover copper from a solution of copper sulphate is?

A. Na

B. Ag

C. Hg

D. Fe

Please explain reason for the answer also

The molar enthalpy change accompanying the removal of an electron from a gas phase atom or ion in its ground state is called

A. Electron gain enthalpy

B. Ionization enthalpy

C. Enthalpy change

D. Enthalpic gas removal