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Balance
Types of reactions
Stoichiometry
Characteristics of reactions
Limiting reagent
100
O2 + H2 --> H2O
O2 + 2 H2 --> 2 H2O
100
Two or more substances react to form a single substance
What is a combination reaction?
100
There are 1.23 mols in _______ g of NO2
How many moles of NO2 are in 56.58 g?
100
Number of molecules involved in the reaction
What is the coefficient number?
100
The reagent that is not completely consumed in a chemical reaction
What is the reagent in excess?
200
C + Fe2O3 --> Fe + CO2
3 C + 2 Fe2O3 --> 4 Fe + 3 CO2
200
Two compounds react and exchange partners to form two new compounds
What is a double replacement reaction?
200
There are 5.28 mols of BaSO4 in _______ Kg of BaSO4.
How many moles of BaSO4 there are in 1.23 Kg?
200
Substances after the chemical reaction
What is products?
200
Controls the amount of product formed
The limiting reagent:
300
K + H2O --> KOH + H2
2 K + 2 H2O --> 2 KOH + H2
300
An element reacts with a compound and displaces another element from the compound
What is a single replacement reaction?
300
4.5 mols of O2 were needed to prepare _______ mols of water. According with the reaction: 2 H2 + O2 --> 2 H2O
How many mols of O2 were needed to prepare 9 mols of water?
300
Substances before the chemical reaction
What is reagents?
300
6 sandwiches can be prepared and the left over is 14 slices of cheese. (2 s.bread + 1 s.cheese --> sand)
How many sandwiches can be prepared if we have 20 slices of cheese and 12 slices of bread?
400
Fe + HCl --> FeCl3 + H2
2 Fe + 6 HCl --> 2 FeCl3 + 3 H2
400
The process in a chemical reaction where electrons are given up
What is an oxidation process?
400
24 mols of N2 and 72 mols of H2 are needed to prepare ____ mols of NH3.
How many mols of N2 and H2 are needed to prepare 48 mols of NH3?
400
The process where one or more substances are transformed onto into one or more new substances.
What is the chemical reaction?
400
100 mols of NO and 150 mols of H2O are produced and a leftover of 195 mols of O2 Chemical reaction: 4 NH3 + 5 O2 --> 4 NO + 6 H2O
How many mols of NO are produced if we have 100 mols of NH3 and 320 mols of O2?
500
Cu(OH)2 + H3PO4 → Cu3(PO4)2 + H2O
3 Cu(OH)2 + 2 H3PO4 → Cu3(PO4)2 + 6 H2O
500
The process in a chemical reaction where the oxidation number decreases (Example from 0 to -2)
What is a reduction process?
500
328.5 g of HCl are needed to prepare ___ mols of FeCl3 According with the reaction: 2 Fe + 6 HCl --> 2 FeCl3 + 3 H2
How many grams of HCl are needed to prepare 3 mols of FeCl3?
500
“Atoms are neither destroyed nor created in a chemical reaction”
What is the Law of Matter conservation?
500
1.5 Kg of NO are produced with ___ moles of NH3 and a left over of 2.5 mols of O2 Chemical reaction: 4 NH3 + 5 O2 --> 4 NO + 6 H2O
How many grams of nitrogen monoxide (NO) are produced if we have 14 mols of ammonia and 20 mols of molecular oxygen?