Pretest

Question 1

Which word equation shows hydrogen reacting with oxygen to form water?

Revolt · Accepted Answer

hydrogen plus oxygen ce bond right arrow water

Question 2

The compound FeCl sub 3 is made of

Revolt · Accepted Answer

one atom of iron and three atoms of chlorine.

Question 3

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out?

Revolt · Accepted Answer

2 atm set over right arrow

Question 4

What is the formula equation for the reaction between sulfuric acid and dissolved sodium hydroxide if all products and reactants are in the aqueous or liquid phase?

Revolt · Accepted Answer

cap h sub 2 SO sub 4 aq plus 2 NaOH aq rightarrow Na sub 2 SO sub 4 aq plus 2 cap h sub 2 cap o l

Question 5

Which formula equation represents the burning of sulfur to produce sulfur dioxide?

Revolt · Accepted Answer

cap s times s plus cap o sub 2 g triangle set over right arrow SO sub 2 g

Question 6

Which formula equation shows a reversible reaction?

Revolt · Accepted Answer

NH sub 4 Cl s left right arrow NH sub 3 times g plus HCl times g

Question 7

Which equation has both a liquid and a gas as products?

Revolt · Accepted Answer

2 HgO s rightarrow 2 Hg l plus cap o sub 2 times g

Question 8

Which statement best describes the formula equation Cl sub 2 times g plus 2 KBr aq ce bond right arrow 2 KCl aq plus Br sub 2 times l ?

Revolt · Accepted Answer

Chlorine gas reacts with potassium bromide to form potassium chloride in solution and liquid bromine.

Question 9

Fluorine gas is placed in contact with calcium metal at high temperatures to produce calcium fluoride powder. What is the formula equation for this reaction?

Revolt · Accepted Answer

cap f sub 2 of g plus Ca s triangle set over right arrow CaF sub 2 s

Question 10

Isopropanol burns in oxygen to yield carbon dioxide, water, and heat. Which word equation best represents this chemical reaction?

Revolt · Accepted Answer

isopropanol plus oxygen rightarrow carbon dioxide plus water plus heat

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