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Chemistry

A Level

What is electronegativity?

It is a measure of how much a neutral atom wants an electron, metals have very low electronegativity, they almost always give electrons up, whereas non-metals usually uptake electrons, so they have a high...

Answered by Margaret F. • Chemistry tutor

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What are the shape of p orbitals?

The shape is a figure of 8 across all three axis, with a node at the origin

Answered by George D. • Chemistry tutor

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Part 2: from the empirical formula, calculate the molecular formula if the molecular weight of the substance is 180 g/mol

Molcular weight of CH2O = 30 g/mol
180/30 = 6
Molecular formula = C6H12O6

Answered by Rachael T. • Chemistry tutor

1596 Views

Part 1: Calculate the empirical formula for a substance with the following composition: H 6.71%; C 40.00%; O 53.29%

C = 12 g/molO = 16 g/molH = 1 g/mol
Ratio of C = 40/12 = 3.33Ratio of O = 53.29/16 = 3.33Ratio of H = 6.71/ 1 = 6.71Divide largest value by smallest value = 6.71/3.33 = 2Empirical formula = CH2O

Answered by Rachael T. • Chemistry tutor

1687 Views

Write an equation for the complete combustion of C9H20

Complete combustion is the oxidation of a fuel where the only products exist as CO₂ and H₂O.
C₉H₂₀ + nO₂ ==> nCO₂ + nH_2<...

Answered by Harry F. • Chemistry tutor

6140 Views

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