Top answers

Chemistry
All levels

Calcium nitride contains 81.1% by mass of the metal. Calculate the empirical formula of calcium nitride. Show your working.

                                                     Ca             NPercentage:                         81.1%       18.9%Relative atomic mass:     40.1             14Ratio:                               ...

Answered by Laura C. Chemistry tutor
7427 Views

Why does the nucleophilic addition of a cyanide ion to an aldehyde form a racemic mixture?

Because the plane of the C=O bond in an aldehyde is flat, and so the nucleophilic attack of CN- onto the C can occur above or below the plane of the molecule, producing two different stereoisom...

Answered by Success A. Chemistry tutor
1776 Views

50.0 g of propene reacts with hydrochloric acid to produce 1-chloropropane. Calculate the percentage yield if only 54.0g is made.

STEPS:Write the equation CH3CHCH2 + HCl -> CH3CH2CH2Cl + H2 (where 1-chloropropane made by electrophilic addition reaction)Identify number of moles of propene used. So number of moles is m/ Mr= 50.0g ...

Answered by Ravinder K. Chemistry tutor
2115 Views

How do acid buffer solutions work?

Firstly, we have to understand what a buffer is. A buffer is a solution which resists changes in pH when small amounts of acid or base are added. The key word here is small amounts, as if too much acid or...

Answered by Tutor472786 D. Chemistry tutor
1921 Views

Why can Diesel be separated from crude oil using fractional distillation?

Crude oil is a mix of hydrocarbons which have different boiling points. Larger hydrocarbon molecules and/or chains have higher boiling points as they have stronger intermolecular forces. The mixture of hy...

Answered by Meha V. Chemistry tutor
3365 Views

We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences