General Chemistry Answers

Al(OH)3(s) →Al2O3(s)+H2O(g)

3.50;g of Al(OH)3 produced 1.96 g of Al2O3 after intense heating. What is the percent yield of the reaction?

The solubility product of baco3 is 8.1×10^ 9 at 25°c .A solution contains 1×10^ 3 moles Ba CO, is 3:1 x lo at 25e Baions A seluuen contauns 1x1o melao/Lit og Baiens 4 a sslution cenlainuig 25Xlo maleo 1il a4 a Caelenate caahont Ba CO 3 mslso/it ot 215XO moles of Ba^+2 ions . If a solution containing 2.5 ×10^ 5 moles of carbonate ions is added to it, will bato precipitate or not?

explain how the strongest type of intermolecular force in liquid HF arises

Calculate caloricity of the 150 g of milk, which contains 25% of protein, 2,5% of fats and 23% of carbohydrates.

Calculate caloricity of the 150 g of milk, which contains 25% of protein, 2,5% of fats and 23% of carbohydrates.

A substance has a molar enthalpy of combustion of 810.4 kJ/mol. When 0.285 mol of the substance is burned in a calorimeter containing 8.60 kg of water, the increase in the temperature of water is:

The heat required to melt and warm the ice is a two-part process.  First energy will be used to change the phase of the ice from solid to liquid.  This constant used to calculate this amount of energy is what we are trying to determine experimentally, the heat of fusion, Fusion, and will be reported in J/g in this lab.

Find the ΔH for the reaction below, given the following reactions and ΔH values: N2(g) + 2O2(g) → 2NO2(g)

N2(g) + 3H2(g) → 2NH3(g) ΔH = -115 kJ

2NH3(g) + 4H2O(l) → 2NO2(g) + 7H2(g) ΔH = -142.5 kJ

H2O(l) → H2(g) + 1/2O2(g) ΔH = -43.7 kJ 

Identify the conjugate acid/base pairs in, NH₃ + H₂PO₄^- →  NH₄⁺ + HPO₄^2-

Consider the reaction: 3HNO3(aq) + K3PO4(aq)  H3PO4 + 3KNO3(aq) What is the concentration of an HNO3 solution if 25.0 mL reacts with 38.5 mL of 0.145 M K3PO4?