Chemistry Answers

  Anhydrous copper(II) sulfate is difficult to dry completely. What mass of copper(II) sulfate would remain after removing 90% of the water from 250. g of CuSO₄×5H₂O? 

Anhydrous copper(II) sulfate is difficult to dry completely. What mass of copper(II) sulfate would remain after removing 90% of the water from 250. g of CuSO₄×5H₂O? 

How to perform a potency test or concentration test of iodine (i2) on a 1L lugol's solution of iodine.

A commercial pesticide Formulation contains 1.0 g deltametrin in 1L solution. What is it's concentration ppm

Thermochemical equation for One mole ammonium nitrate (NH4NO3) dissolves in water to produce aqueous

ammonium ions and nitrate ions accompanied by the absorption of 28.1 kJ of hea

Calculate the amount of heat released during the combustion of

a. 0.75 mole of C₃H₆O 

b. 120g of C₃H₆O 

What is the molality of 40g KBr dissolved 800 mL water

Different the two types of catalyst through an illustration.

ΔH and ΔS for a certain reaction are 10 kJ mol^-1 and 10 J K^-1 mol^-1 respectively. What is ΔG in kJ mol^-1 at 400 K? 

Under certain circumstances, ΔG for reaction (1) is -13.4 kJ mol^-1. Indicate whether the reaction equilibrium favours the products or the reactants.