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25 Cards in this Set

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  • Back
The molas mass of (NH4)2 SO4 is:
132g
The % of Cl in KClO is:
29%
The number of moles in 320g of NaOH is:
8
The empirical formula of a compound with a composition 65.2% Sc and 34.8% O is:
Sc O
The empirical formula of a compound 42.9%C and 57.1%O is:
CO
The molecular formula of a compound 92.3%C and 7.7%H which weighs 78g/mole is:
C H
The mass in grams of one molecule of CO is equal to:
7.3 x 10 g
The molar mass of paradichloroenzene (C H Cl ) is
147g
A compound is 26.8%Cr, 32.9%O and 40.3%K. The formula for this compound is:
K CrO
What is the mass of Carbon in 20g of C H ? hint: find % first.
16.4g
If I placed 100 atoms of lead and 100 atoms of copper on a scale, which would weigh more?
lead
Which compound has the highest % of Cl
NaClO
If I divide a quantity of a compound by the molar mass of that compound I will determine:
the number of moles
Moles are proportional to:
atoms and molecules
Which of these represents a molecular formula
C H
How many molecules are in 1 mole of neon?
6.02 x 10
If I have 3.6 x 10 atoms, how many moles do I have?
6 moles
How many particles does the molar mass of any substance contain?
6.02 x 10
What is the mass of 1 mole of water?
18g
The first step in finding the empirical formula of a compound is to:
determine the number of moles of each element.
When balanced, the co-efficients of this equation are:
KClO = KCl + O
2, 2, 3
When balanced the co-efficients of this equation are:
CH + O = CO + H O
1,2,1,2
When balanced, the co-efficients of this equation are:
H PO + Ca(OH) = Ca (Po ) + H O
2,3,1,6
How many moles of water are produced when .67 moles of NaOH H C O + 2NaOH = Na C O + 2H O
0.67
How many grams of aluminum are produced by the decomposition of 125g of Al O ? 2Al O = 4Al +3O
66