General Chemistry Answers

in the reaction 2Mg(s) + O2(g) + 2H2O(l) yields 2Mg(aq) +4OH(aq), which substance is oxidized?

A certain volume of gas is found to weigh 4.4g, an equal volume of hydrogen gas weighs 0.2g. The molar mass of the gas is

Given the equation: C₂O₄^-2 + HPO₄^-2  ⇔ HC₂O₄^-1 + PO₄^-3  the base is:

Chlorine and methane react in the presence of sunlight. There are three steps involved in this reaction which are initiation, propagation and termination. Write equations to show the steps involved in this reaction mechanism.

2AlBr3 + 3K2SO4 = 6KBr + Al2(SO4)3

a) A student combines 12.7 grams of AlBr3 with 18.2 grams of K2SO4. How many grams of KBr will be produced from this reaction?

b)  In a separate experiment using these same reactants, a student determined that theoretically, they should have produced 157 grams of Al2(SO4)3 however when the experiment was complete they only produced 145 grams. What is the percent yield? 

1) Balance the equation

a) __A2B3 + __C = __C3B4 + ___A

b) __D + __E2= __D2E3

c) __FGH2= __FG + __F2H

d) __I + __J2 = __IJ5

Polymerize the started compounds, at least 8 carbon atoms for each polymer :

a) 2-ethylbutene (CH2=C(C2H5)CH2CH3)

b) 3,4- dipropyl-3-octene

c) methyl methacrylate (CH2=C(CH3)COOCH3)

d) 5-hydroxypentenly benzoate (C6H5COOCH=CHC3H6OH)

2C4H10 + 13O2 = 8CO2 + 10H2O

If 172 grams of water was produced in this reaction, how much oxygen was used? 

For the reaction A(aq)+B(aq)----- C(aq)+D(aq) the equilibrium constant is 24.6 at 25 c and 37.6 at 50 c What is the value of satndard Gibbs free energy change (in Kj) of this reaction at 75 c

is NaF + H₂O → HF + NaOH exothermic or endothermic? & what is the state of each substance?