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An excess of Lead (II) oxide reacts with 175cm3 of 1.5 mol dm3 nitric acid. Calculate the maximum quantity of lead that can be obtained from this reaction.

Write the equation: PbO + HNO 3 --> PbNO 3 + H 2 O. Balance the equation: there are two moles of hydrogen (in water) on the right. To balance the hydrogens, two moles of hydrogen are needed on the left to...
HS
Answered by Hibba S. • Chemistry tutor
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Explain, with reference to the electronic transitions involved, how characteristic flame colours of metal ions are formed and why the flame colours are different.

To answer this we need to talk about how electrons move in an atom. Electrons are in energy levels (orbitals) and an electron in the highest unoccupied orbital can be excited to a higher shell when given eno...
IK
Answered by Isabel K. • Chemistry tutor
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The shape around the oxygen atom in butan-2-ol is non linear. Predict the shape and angle of the C-O-H bond giving explanations

This bond can be described as having a non-linear or bent geometry, with a bond angle of approximately 104.5 degrees. It has this angle because the oxygen atom has 2 lone pairs and 2 bonding pairs of electro...
SD
Answered by Samuel D. • Chemistry tutor
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The Aldehyde CH3CH2CHO (A) reacts with HCN to give a racemic mixture, name the compound CH3CH2CH(CN)OH (B) formed and explain why we get a racemic mixture and how we could differentiate between two different enantiomerically pure solutions of B

B = R/S 2-hydroxybutanenitrile we get a racemic mixture because the carbon in the aldehyde where the nucleophile attacks has a trigonal planar geometry and so there is an equal chance of attack by the nucleo...
JV
Answered by Jake V. • Chemistry tutor
13582 Views

Describe how collision theory explains an increase in the rate of a reaction at higher temperatures.

When temp increases, kinetic energy of molecules increases. Higher kinetic energy means molecules move around more and increased movement leads to more collisions. Collision theory states that the rate of re...
CM
Answered by Charlie M. • Chemistry tutor
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