Summative 8.1 and 8.2 Advanced Chem, 20-21
1. For the following UNBALANCED reaction what is the mole ratio of H, O to B(OH),?
BO (+ HOB(OH),
A. 3 H 0:2 B(OH),
B. 2 H20 : 3 B(OH), C. 2 H,0:1 B(OH), D. 1 H,0:1 B(OH)
2. Lead(II) sulfide, Pbs, reacts with oxygen gas to produce lead(II) oxide and sulfur
dioxide.
2PbS + 302 - 2PbO + 2502
If 0.500 moles of O, were consumed using this chemical reaction, how many moles of
PbO would be produced?
A.
0.38 mol
B. 0.75 mol
C. 0.67 mol
D. 0.33 mol
3. Potassium chlorate, KCIOy, decomposes when heated to produce potassium chloride
and oxygen gas.
2KCIO, 2KCI + 302
If 2.50 grams of Kao, were heated in a test tube, how many moles of O, should be
given off?
A. 0.02 moles B. 0.04 moles C. 0.06 moles D. 0.03 moles
4. If 0.79 moles of Al is reacted with Fe, Os, the products will be Al,0, and Fe. What mass
of Fe will be produced?
2A1 + 1Fe 0,1A, O, + 2Fe
What mass of Fe will be produced?
A.
31.9 g
B. 63.9 g
C. 44.2 g
D. 22.1 g
5. How many moles of hydrogen (H) will react with 2.50 moles of hydrochloric acid (HCI)?
Mg . + 2 HĆI (4) Mgá, () + H
A. 1.25 moles HR
B. 2.50 moles H, C. 5.00 moles H
D. 7.50 moles H