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WorksheetsConservation of Mass
Total questions: 20
Worksheet time: 3600secs
The formation of an ionic bond involves the
sharing of neutrons.
transfer of electrons.
sharing of protons
sharing of neutrons.
Which part of an atom creates MOST of the atom’s volume?
Nucleus
Proton
Neutron
Electron
Charged particles formed during a chemical reaction are
Ions
Protons
Molecules
Neutrons
Examine the following chemical equation:
Mg + S → MgS
Two atoms combine to form one atom.
Two atoms combine to form one molecule
Two elements combine to form a different element
Two elements combine to form two new elements
What change has taken place in the following?
K → Kᐩ
loss of a proton
gain of a proton
loss of an electron
gain of an electron
A bond is formed when an electron is transferred from a sodium atom to a chlorine atom. What happens to the sodium atom during this process?
The mass of the atom increases
The atom becomes an isotope
The atomic number decreases
The atom become a positive ion
An atom becomes an ion with a ⁻1 charge because the atom
gains one electron
loses one electron
gains one proton
loses one proton
If 100 grams of vinegar and 5 grams of baking soda are poured in a container, a small amount of gas will be produced. What will the final mass of the products be if the gas is trapped in the container?
100 grams
104 grams
105 grams
110 grams
A scientist studies the following chemical equation for the production of water.
2H₂ + O₂ → 2H₂O
mass of oxygen stays the same
mass of the hydrogen doubles
mass of oxygen decreases
mass of hydrogen increases
The chemical equation below shows the amount of the reactants used and the amount of only one of the products formed.
Mass (g)
CH4 (4 g) + 2O2 (16 g) → CO2 (11g) + 2H2O (?)
5 g
9 g
27 g
31 g
use the process of photosynthesis to convert carbon dioxide and water into glucose and oxygen.
6CO2 + 6H2O → C6H12O6 + 6O2
Carbon Water Glucose Oxygen
Dioxide
If a plant uses 44 grams of carbon dioxide and 18 grams of water to produce 32 grams of oxygen, how many grams of glucose are produced for the plant to use?
26 grams
30 grams
62 grams
94 grams
The diagram shows a chemical reaction that occurs between hydrogen and oxygen.
Which scientific law is BEST demonstrated by the reaction shown in the diagram?
law of angular momentum
law of universal gravitation
law of conservation of mass
law of conservation of energy
Hydrogen and nitrogen react to produce ammonia gas as shown in the following chemical equation.
N₂ + 3H₂ → 2NH₃
25.9g + ? → 31.5g
5.60 g
3.73 g
2.49 g
1.64 g
What is the coefficient for iodide ions (I⁻) when the equation is balanced?
__ Cu+2 + __I- → __CuI + __I2
1
2
3
4
When magnesium is burned in the presence of oxygen, it produces magnesium oxide according to the following chemical equation.
2Mg + O₂ → 2MgO
3.45g + 2.27g → ?
8.69 g
5.72 g
4.35 g
3.45 g
The chemical equation shows the production of magnesium chloride.
Mg + 2HCl → MgCl2 + H2
12g + 36g → 47g + ?
1.0 g
2.0 g
3.0 g
4.0 g
Which of the following is the balanced chemical equation that represents the chemical reaction of potassium and oxygen to produce potassium oxide?
K + O → KO
4K + O2 → 2K2O
2K + O → K2O
2K + 2O → K2O2
An aerobic cellular respiration, glucose (C6H12O6) is broken down in a series of reactions to produce carbon dioxide (CO2) and water (H2O). These reactions provide the energy necessary for the production of energy in the form of 36 ATP molecules.
C6H12O6 + 6O2 → 6CO2 + H2O + energy (36 ATP)
The law of conservation of mass is correctly demonstrated in which statement about the process of cellular respiration?
The mass of glucose is equal to the total mass of the water molecules
The mass of glucose is conserved in the mass of the ATP in the products
The total mass of oxygen is conserved in the total mass of carbon dioxide produced
The total mass of glucose and oxygen is equal to the total mass of carbon dioxide and water.
Which equation for the complete combustion of propane (C3H8) is correctly balanced?
C3H8 + 3O2 → 2CO2 + 4H2
C3H8 + 7O2 → 3CO2 + 4H2O
2C3H8 + 10O2 → 6CO2 + 8H2O
C3H8 + 5O2 → 3CO2 + 4H2O
The equation is NOT balanced
___ CH4 + ___ O2 → CO2 + ___ H2O
2, 2, 1, 4
1,1,1,2
1,2,1,2
0,3,2,2
