Chemistry Answers

What volume will 200 ml of gas at 20 o C and 800 mm Hg occupy at STP?

A sodium atom has a mass of 22.99 u. Use Avogadro’s

constant and the conversion factor 1.661 3 10–24 g/u to

calculate the mass of 1.00 mol of sodium atoms.

A 2.9 g sample of a pure compound contains 0.050 mol of

the compound. Use this data to calculate the molar mass of

the compound.

Write the lewis structure for the ozone molecule, O3

a. The skeletal structure is

b. Draw the lewis structure

Write the lewis structure for the ozone molecule, O3

Analysis of a hydrocarbon showed that 7.8 g of the hydrocarbon contained 0.6 g of

hydrogen and that the relative molecular mass was 78. Find the molecular formula of the

hydrocarbon

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Arrange the following iso-electronic species in order of decreasing atomic radius. Na+

Mg2+, Al3+, Si4+, N3-

, 02-

, F, Ne

Choose the correct option: Important factors that influence the E1 reaction mechanism

i. Electron donating ability of substituents

ii. Good leaving group

iii. solvents of high polarity

iv. All of the above

write the structure of the polymer tetrafluoroethylene (up to 10 carbons in length)