Chemistry midterm review

Unit 1 - intro

100

sig figs in 0.00012040?

what is 5?

200

13.1 + 14.26 with correct sig figs

what is 27.4?

300

(4.0 x 10⁶) / (2.0 x 10²) with correct sig figs

what is 2.0 x 10⁴?

400

Is iron rusting a chemical or physical property?

what is chemical?

500

What is the correct formula for percent difference?

%difference = |e₁-e₂|/ (1/2 e₁+e₂) x 100

Unit 2 - atoms and the periodic table

100

the group on the periodic table that is inert

what is the noble gases?

200

the charge that nitrogen makes to complete it's octet (oxidation number)

what is -3?

300

the number of valence electron in an aluminum atom?

what is 3 valence electrons?

400

the chemical formula for iron (III) oxide

what is Fe₂O₃

500

what is the electron configuration of Germanium?

[Ar] 4s²3d¹⁰4p²

Unit 3 - the mole

100

if I have 1 mole of feathers, this is how many feathers I have

what is 6.02 x 10²³ feathers?

200

convert 3 moles to particles

what is 1.82 x 10²⁴ particles?

300

convert 5.6 grams of copper to particles

what is 5.30 x 10²² particles?

400

the percent iron in Fe₂O₃?

What is 69.95% iron?

500

the empirical formula of a compound containing 20.23% aluminum and 79.77% chlorine?

what is AlCl₃?

Free for all

100

What is the symbol for mercury?

Hg

200

does the lewis structure for CO₂ contain double or single bonds?

double

300

what is the correct name for Sn₃(PO₄)₂

what is tin (II) phosphate?

400

what is the molar mass of Ti(SO₄)₂

what is 239.91 g/mol?

500

Find the molecular formula of a compound the has an empirical formula mass of 45.99 and a molecular formula mass of 92.02.

what is N₂O₄?