Law of Conservation of Mass Flashcards
A reaction of heating calcium carbonate produces calcium oxide and carbon dioxide gas. Heat 10.0 g calcium carbonate until no more carbon dioxide gas is given off. The remaining material has a mass of 5.6 g. What mass of carbon dioxide gas was produced in the reaction? ___ g
4.4
When heated, calcium hydroxide and ammonium chloride react to produce ammonia gas, water vapor, and solid calcium chloride. Suppose 5.00g of calcium hydroxide and 10.00g of ammonium chloride are mixed in a test tube and heated until no more ammonia is given off. The resulting calcium chloride in the test tube has a mass of 1.27 g.
What is the total mass of ammonia and water vapor produced?
___ g
13.73
A reaction of 22.85 g of sodium hydroxide with 20.82 g of hydrogen chloride produces 10.29 g of water and X g of sodium chloride.
X = ___ g
33.38
During a chemical reaction, the law of _______ _______ states that the total mass of the products must be equal to the total mass of the reactant.
Conservation of Mass
In any chemical reaction or physical change, the mass of the products is ____ the mass of the reactants.
equal to
Magnesium (24.30 g) reacts with hydrogen chloride (X g) to produce hydrogen gas (2.04 g) and magnesium chloride (96.90 g).
What mass of hydrogen chloride was used in the reaction?
______ g HCl
74.64
A reaction between ammonia gas and chlorine gas produces ammonium chloride and nitrogen gas as shown in the reaction below.
8NH3(g)+3Cl2(g)→N2(g)+6NH4Cl(l)
A reaction of 17.0 g of ammonia with 26.6 g of chlorine gas produces 3.50 g of nitrogen. What mass of ammonium chloride is produced in the reaction?
___ g
40.1
A reaction of heating potassium permanganate produces potassium manganate, manganese dioxide and oxygen gas. Heat 15.8 g potassium permanganate until no more oxygen gas is given off. The remaining material has a mass of 14.2 g. What mass of oxygen gas was produced in the reaction? ___ g
1.6
A reaction of 12.640 g of copper oxide with 0.316 g hydrogen produces 2.844 g of water and X g of copper. X = ___ g
10.112
2.56 g of hydrogen reacts completely with 20.32 g of oxygen to form X g of water. X = ___g
22.88
According to the law of conservation of mass, if an atom of element A has a mass of 2 units, while an atom of element B has a mass of 5 units, what would be the mass of the compound A3B2?
16 units
Calcium carbonate, CaCO3, decomposes when heated to calcium oxide (CaO) and carbon dioxide (CO2). If 100 g of calcium carbonate is allowed to decompose, 56 g of calcium oxide is produced. What mass of carbon dioxide is produced by the decomposition?
_____ g
44
According to conservation of mass when water freezes into ice the amount of mass of the ice would be
equal to that of the water
When one or more substances undergo a chemical reaction, the:
Mass of the reactant decreases and the mass of the product increases but the total mass remains the same.
For any chemical process in an isolated system in which all reactants are converted to products, the original mass of reactants must be _____ the final mass of products.
Equal to
