Exemplify the law of conservation of mass by balancing chemical equations.
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Q 1/20
Score 0
__BaCl₂ + __Na₂SO₄ → __NaCl + __BaSO₄
30
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Q 2/20
Score 0
__CaO + __H₂O → __Ca(OH)₂
30
balanced
20 questions
Q.
__BaCl₂ + __Na₂SO₄ → __NaCl + __BaSO₄
1
30 sec
PSc.2.2.4
Q.
__CaO + __H₂O → __Ca(OH)₂
2
30 sec
PSc.2.2.4
Q.
__CS₂ + __O₂ → __CO₂ + __SO₂
3
30 sec
PSc.2.2.4
Q.
__Fe +__O₂ → __Fe₂O₃
4
30 sec
PSc.2.2.4
Q.
__MgS + __O₂ → __MgO + __SO₂
5
30 sec
PSc.2.2.4
Q.
__Na + __F₂ → __NaF
6
30 sec
PSc.2.2.4
Q.
__Na + __MgF₂ → __NaF + __Mg
7
30 sec
PSc.2.2.4
Q.
__Sn + __HF → __SnF₂ + __H₂
8
30 sec
PSc.2.2.4
Q.
A chemical substance formed as a result of a chemical reaction
9
30 sec
PSc.2.2.4
Q.
A chemical substance that is present at the start of a chemical reaction.
10
30 sec
PSc.2.2.4
Q.
A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.
11
30 sec
PSc.2.2.4
Q.
A number written slightly below and to the right of a chemical symbol that shows how many atoms of an element are in a compound.
12
30 sec
PSc.2.2.4
Q.
A process during which chemical bonds between atoms are broken and new ones are formed. Producing one or more different substances.
13
30 sec
PSc.2.2.4
Q.
A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products
14
30 sec
PSc.2.2.4
Q.
__CH₄ + __O₂ → __CO₂ + __H₂O
15
30 sec
PSc.2.2.4
Q.
During any chemical reaction, the mass of the products is always equal to the mass of the reactants
16
30 sec
PSc.2.2.4
Q.
keep mass of products and reactants the same by adjusting coefficients as necessary
17
30 sec
PSc.2.2.4
Q.
Makes, creates, produces; Arrow in chemical equation
18
30 sec
PSc.2.2.4
Q.
skeleton equation
19
30 sec
PSc.2.2.4
Q.
Which number can't change when balancing a reaction?
