question archive What is the empirical formula of a compound composed of 25
What is the empirical formula of a compound composed of 25
Subject:ChemistryPrice: Bought3
What is the empirical formula of a compound composed of 25.1 g of potassium (K) and 5.14 g of oxygen (O)? Insert subscripts as needed.
empirical formula:
KO
A 17.02 g sample of a compound contains 5.43 g of potassium, K, 4.92 g of chlorine, Cl, and oxygen, O. Calculate the empirical formula.
Insert subscripts as needed.
Empirical formula:
KClO
A 9.32 g sample of a compound contains 5.95 g of iron, Fe, 1.10 g of phosphorus, P, and oxygen, O. Calculate the empirical formula for the compound.
empirical formula:
Determine the empirical formula for a compound that contains 58.8% C, 9.8% H, and 31.4% S by mass.
empirical formula:
Determine the empirical formula for a compound that is 62.1% C, 10.4% H, and 27.5% O by mass.
empirical formula:
What is the empirical formula of a compound composed of 3.25% hydrogen (H), 19.36% carbon (C), and 77.39% oxygen (O)by mass?
Insert subscripts as needed.
empirical formula:
HCO
For the chemical reaction shown,
2H2O2(l)+N2H4(l)?4H2O(g)+N2(g)
determine how many grams of N2 are produced from the reaction of 9.97 g of H2O2 and 6.35 g of N2H4.
N2 produced:
When heated, KClO3 decomposes into KCl and O2.
2KClO3?2KCl+3O2
If this reaction produced 89.1 g KCl, how many grams of O2 were produced?
mass:
g O2
When 0.540 g of sodium metal is added to an excess of hydrochloric acid, 5610 J of heat are produced. What is the enthalpy of the reaction as written?
2Na(s)+2HCl(aq)?2NaCl(aq)+H2(g)
Enthalpy of reaction:
When methanol, CH3OH, is burned in the presence of oxygen gas, O2, a large amount of heat energy is released, as shown in the combustion reaction.
CH3OH(g)+32O2(g)?CO2(g)+2H2O(l)Δ????=−764 kJ
Based on the balanced thermochemical reaction, how much heat is produced when 33.6 g of methanol reacts with 52.1 gof oxygen?
heat:
When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced.
CaCO3(s)+2HCl(aq)?CaCl2(aq)+H2O(l)+CO2(g)
How many grams of calcium chloride will be produced when 30.0 g of calcium carbonate is combined with 12.0 g of hydrochloric acid?
mass of CaCl2:
g
Which reactant is in excess?HClCaCO3
How many grams of the excess reactant will remain after the reaction is complete?
mass of excess reactant:
Nitrogen and hydrogen combine at a high temperature, in the presence of a catalyst, to produce ammonia.
N2(g)+3H2(g)?2NH3(g)
Assume 0.200 mol N2 and 0.633 mol H2 are present initially.
After complete reaction, how many moles of ammonia are produced?
NH3:
mol
How many moles of H2 remain?
H2:
mol
How many moles of N2 remain?
N2:
mol
What is the limiting reactant?hydrogen
nitrogen
