1 exam - Chem 141-08 Exam 1 - September 17,2007 Multiple...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem 141-08 Exam 1 - September 17,2007 Name:_______________________________ Multiple Choice: (3 points each) _ C __ 1. Which sample contains the most atoms? a) 50 grams of P c) 50 grams of Be b) 50 grams of Br d) 50 grams of Au _C __ 2. How many atoms of phosphorous (P) are in one molecule of Ca 3 (PO 4 ) 2 ? a) 4 c) 2 b) 3 d) 1.21 x 10 24 _ C __ 3. What is the mass of one mole of K 2 SO 4 ? a) 86 g c) 174.3 g b) 87.13 g d) 135.16 g _ D __ 4. The number of moles of nitrate ions in 1.50 L of 0.06 M Ce(NO 3 ) 4 is: a) 0.09 moles b) 0.24 moles c) 1.08 moles d) 0.36 moles _ A __ 5. Three liters of 1.50 M KBr contains: a) 536 g KBr b) 268 g KBr c) 4.00 moles KBr d) 1.50 mole KBr _ C __ 6. The following reaction is best classified as: 2 H 2 O (l) 2 H 2(g) + O 2(g) a) displacement c) decomposition b) exchange d) combination _ D __ 7. How many moles of NH 3 will be formed in the reaction of 22.5 g of H 2 ? N 2(g) + 3 H 2(g) 2 NH 3(g) a) 4.14 moles c) 33.2 moles b) 15.0 moles d) 7.5 moles _ C __ 8. Fe 2 O 3 can be converted to elemental Fe by treatment with CO gas:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

1 exam - Chem 141-08 Exam 1 - September 17,2007 Multiple...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online