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Q 1/16
Score 0
Which of the following is the balanced equation for the reaction between nitrogen gas (N2) and hydrogen gas (H2) to form ammonia (NH3)?
30
3N2 + H2 -> NH3
N2 + 2H2 -> NH3
2N2 + 3H2 -> NH3
N2 + 3H2 -> 2NH3
Q 2/16
Score 0
Which of the following is the balanced equation for the reaction between sodium carbonate (Na2CO3) and hydrochloric acid (HCl) to form sodium chloride (NaCl), carbon dioxide (CO2), and water (H2O)?
30
2Na2CO3 + 2HCl -> 2NaCl + CO2 + H2O
Na2CO3 + 2HCl -> NaCl + CO2 + 2H2O
Na2CO3 + 2HCl -> NaCl + CO2 + H2O
2Na2CO3 + HCl -> 2NaCl + CO2 + H2O
16 questions
Q.
Which of the following is the balanced equation for the reaction between nitrogen gas (N2) and hydrogen gas (H2) to form ammonia (NH3)?
1
30 sec
Q.
Which of the following is the balanced equation for the reaction between sodium carbonate (Na2CO3) and hydrochloric acid (HCl) to form sodium chloride (NaCl), carbon dioxide (CO2), and water (H2O)?
2
30 sec
Q.
Which of the following is the balanced equation for the reaction between sulfuric acid (H2SO4) and calcium hydroxide (Ca(OH)2) to form calcium sulfate (CaSO4) and water (H2O)?
3
30 sec
Q.
What happens during a chemical reaction?
4
30 sec
Q.
What are reactants in a chemical reaction?
5
30 sec
Q.
What are products in a chemical reaction?
6
30 sec
Q.
What happens to matter during a chemical reaction?
7
30 sec
Q.
What does a balanced chemical equation demonstrate?
8
30 sec
Q.
What is the purpose of a coefficient in a chemical equation?
9
30 sec
Q.
What is the minimum energy required to initiate a reaction called?
10
30 sec
Q.
What type of reactions release energy in the form of heat?
11
30 sec
Q.
What type of reactions absorb energy?
12
30 sec
Q.
What is the purpose of subscripts in a chemical formula?
13
30 sec
Q.
What does it mean to say that a chemical reaction is exothermic?
14
30 sec
Q.
What is the main purpose of balancing chemical equations?
15
30 sec
Q.
Which of the following statements is true about chemical reactions?
