Daily quizes
17 important questions on Daily quizes
A compound has a chemical composition of 97.6 g carbon, 4.9 g hydrogen, 52 g oxygen, 45.5 g nitrogen. What is the empirical formula?
C5H3O2N2
Which of the following is NOT an empirical formula?
N2O5
MgCl2 C6H12O6
A compound has a chemical composition of .62 g carbon, .10 g hydrogen, .28 g oxygen. What is the empirical formula?
C3H6O
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A mineral consisted of 29.4% calcium, 23.5% sulfur and 47.1% oxygen. What is the empirical formula?
26 g of zinc combines with 12.8 g of sulfur. What is the empirical formula of zinc sulfide?
ZnS
Zn2S2
znS2
A(n) __________formula is one that shows the lowest whole number ratio of the elements in a compound>
A compound has a chemical composition of 32.8% chromium and 67.2% chlorine. What is the empirical formula?
CrCl3 CrCI
CrCl2
Vinegar, which has many applications, has the following percent composition: 39.9% carbon, 6.7% hydrogen and 53.4% Oxygen. What is the empirical formula?
C3H6O3
CH2O
CHO
C2H4O2
What is the name of the procedure which determines the composition of the elements in a compound?
What is the empirical formula mass (EFM) of P2O5?
Write the formula for copper (II) sulfate hexahydrate.
An analysis reveals that a substance consists of 65.5% of carbon, 5.5% of hydrogen and 29.0% of oxygen, If the molar mass of the compound is 110 g/mol, what is the MOLECULAR Formula?
C6H6O2
Find the percent composition of water in barium chloride dihydrate. Round answer.
Name the following hydrate CuSO4 · 5 H2O.
copper (II) sulfate pentahydrate
An unknown substance has the composition of 77.87% C, 11.76% H and 10.37% O. The compound has a molar mass of 154.25 g/mole. What is the molecular formula?
C10H18O
If the empirical formula of a compound is CH2 and the molar mass is 70.0 g/mol, what is the molecular formula?
Write the formula for magnesium sulfate trihydrate.
MgSO4 3H2O
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