Chemistry

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 […]

Oct 4th, 2021

Chemistry

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 […]

Oct 4th, 2021

Chemistry

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 […]

Oct 4th, 2021

Chemistry

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 […]

Oct 4th, 2021

Chemistry

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 […]

Oct 3rd, 2021

Chemistry

Rate of disappearance

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

Sep 24th, 2021

Chemistry

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 […]

Sep 24th, 2021

Chemistry

Types of chromatography

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

Sep 22nd, 2021

Chemistry

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) + […]

Sep 20th, 2021

Chemistry

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 […]

Sep 16th, 2021

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