Chem_5ed Chap 11 Review

One mole of Carbon dioxide contains

• 1 mole of carbon and 1 mole of oxygen

• 0.333 mol carbon, 0.666 mol oxygen

• 1 mol of carbon and 2 mol of oxygen

• 2 mol of carbon and 1 mol of oxygen

Tags

NGSS.HS-PS1-7

What is the mass of 5.45 mol of Aluminum (M = 26.982 g/mol)

• 4.95 g

• 120.5 g
• 147.1

• 75.3 g

Given that the molar mass of calcium is 40.078 g/mol and bromine is 79.904 g/mol, then what is the molar mass of calcium bromide? (CaBr₂)

• 199.886 g/mol
• 180.328 g/mol

• 119.982 g/mol

• 3202.39 g/mol

What is the molar mass of lead nitrate? Pb(NO₃)₂

Pb is 207.2 g/mol; N is 14.007 g/mol; O is 15.999 g/mol

• 253.205 g/mol

• 331.208 g/mol
• 237.206 g/mol

• 474.412 g/mol

How many moles are in 10.00 g of lead chromate (PbCrO₄).

Pb is 207.2 g/mol; Cr is 51.996 g/mol; O is 15.999 g/mol

• 0.06192 moles
• 32.3192 moles

• 0.04578 moles
• 0.03094 moles

g/mol is the unit of

• molarity

• molality

• molar mass

• atomic weight

Which of these shows a visual representation of the arrangement of bonds in a molecule?

• molecular formula

• empirical formula

• structural formula

• ionic formula

Iron(II) sulfate (FeSO₄) is a therapeutic agent for iron-deficiency anemia. It is administered orally as iron(II) sulfate heptahydrate. If 0.300 g FeSO₄ ^. 7H₂O contain 0.0603 g of iron, 0.0346 g of sulfur, 0.190 g of oxygen and 0.0151 g of hydrogen, what is the percent composition of FeSO₄ ^. 7H₂O?

• Fe: 15.3%, S: 10.7%, O: 21.90%, H: 3.10%

• Fe: 20.1%, S: 11.5%, O: 63.3%, H: 5.03%

• Fe: 25.5%, S: 5.4%, O: 30.53%, H: 2.47%

• Fe: 18.02%, S: 12.12%, O: 25.32%, H: 6.90%

What is the ratio of water to phosphoric acid in the following formula

P₂O₅(s) + 3H₂O(l) → 2H₃PO₄(aq)

• 1:1 (3:3)

• 2:3

• 3:2

• 2:1 (4:2)

For the reaction below, how many grams of phosphoric acid will be produced by 45.00 g of diphosphorus pentaoxide and a surplus of water?

P₂O₅(s) + 3H₂O(l) → 2H₃PO₄(aq)

• 62.13 g

• 22.50 g

• 90.00

• 30.54 g