Calculate the enthalpy change for the reaction

1) Calculate the enthalpy change for the reaction: P4O6(s)+2O2(g)>>P4O10(s) given the following enthalpies of reaction: P4(s)+3O2(g)>>P4O6(s) deltaH = -1640.1 kJ […]

Chemistry Equations

1- What mass of Cu(s) is electroplated by running 28.5A of current through a Cu 2+ (aq) solution for 4.00 […]

Write balanced molecular and net ionic equations for the reactions

Write balanced molecular and net ionic equations for the reactions of a) m a) hydrochloric acid with nickel b) dilute […]

Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid

Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid. It has pKa1=2.36 and pKa2=9.60 1. Draw the […]

How every type of chromatography could be used in analytical chemistry

1. If you wish to extract aqueous acetic acid into hexane, is it more effective to adjust the aqueous phase […]

Rate of disappearance

For the hypothetical reaction A → B, calculate the average rate of disappearance of A if the initial concentration of […]

A soluble unknown has contaminated your sample

A soluble unknown has contaminated your sample. It absorbs the same wavelength as your analyte, Allura Red dye. How will […]

Types of chromatography

1. If you wish to extract aqueous acetic acid into hexane, is it more effective to adjust the aqueous phase […]

How much heat is needed to decompose 505 g of the oxide?

A mercury mirror forms inside a test tube by the thermal decomposition of mercury(II) oxide. 2 HgO(s) 2 Hg(l) + […]

Explain why oxygen atoms are neutral

1. Explain why oxygen atoms are neutral. 2. Compare: an atom’s structure to a ladder. What parts of the ladder […]