9.2 Two-step Conversions Retake!: Question Preview (ID: 13734)


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A clown needs 4.5 x 10^15 particles of Helium (He). How many grams of helium does he need?
a) 5.12 x 10^38 grams of He b) 5.12 x 10^38 grams of He c) 2.99 x 10^-8 particles of He d) 2.99 x 10^-8 grams of He
How many FeO particles are there in 21g of FeO?
a) 12 grams b) 1.76 x 10^23 particles of FeO c) 6.02 x 10^23 particles of FeO d) 4.5 x 10^12 grams of FeO
How many atoms are in 10.5 grams of Chlorine gas (Cl)?
a) 1.8 x 10^23 atoms b) 2.8 x 10^15 atoms c) 10.3 x 10^19 grams d) 4.3 x 10^21 grams
How many atoms are in 12.2 grams of CO2?
a) 1.66 x 10^23 particles b) 2.23 x 10^12 c) 1.56 x 10^12 d) 2.43 x 10^42
How many atoms are in 1.2 grams of Ca?
a) 5.9 x 10^14 atoms b) .18 x 10^23 atoms c) 1.5 x 10^45 atoms d) 2.9 x 10^12 atoms
What is the molar mass of CaO?
a) 45.12 grams/1 mole of CaO b) 34.12 grams/ 1 moles of CaO c) 56.06 grams/ 1 mole of CaO d) 90.10 grams/ 1 mole of CaO
You discovered an unknown metal. It is either K, Co, or Cu. 1 mole of the metal is weighed at 58.93 grams. What is the metal?
a) None of the metals b) K c) Co d) Cu
How many grams are in 2.4 x 10^15 atoms of Helium (He)?
a) 12.4 grams b) 2.98 x 10^45 grams c) 2.59 x 10^38 grams d) 1.59 x 10^-8 grams
The mole is a...
a) furry animal b) a conversion factor c) used in english class d) equals 1000 things
What is the molar mass of Re?
a) 186.21 grams/ 1 mole of Re b) 202.1 grams/ 1 mole of Re c) 108.3 grams/ 1 mole of Re d) 109.5 grams/ 1 mole of Re
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