Investigate how mass is conserved in chemical reactions and relate conservation of mass to the rearrangement of atoms using chemical equations, including photosynthesis.
Describe the properties of cohesion, adhesion, and surface tension in water and relate to observable phenomena such as the formation of droplets, transport in plants, and insects walking on water.
Compare and contrast the properties of acids and bases, including pH relative to water.
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Q 1/53
Score 0
Which of the following elements can be identified in a chemical reaction involving sodium chloride (NaCl)?
30
Calcium (Ca)
Nitrogen (N)
Sodium (Na)
Carbon (C)
Q 2/53
Score 0
In a chemical reaction forming water (H2O), which elements are involved according to the periodic table?
30
Carbon (C) and Hyrdrogen (H)
Hydrogen (H) and Oxygen (O)
Nitrogen (N) and Oxygen (O)
Oxygen (O) and Helium (He)
53 questions
Q.
Which of the following elements can be identified in a chemical reaction involving sodium chloride (NaCl)?
1
30 sec
8.6(B)
Q.
In a chemical reaction forming water (H2O), which elements are involved according to the periodic table?
2
30 sec
8.6(B)
Q.
The chemical formula of carbon dioxide is CO2. Which element has only a single atom in this forumla?
3
30 sec
8.6(B)
Q.
When magnesium oxide (MgO) is formed, which element from the periodic table is involved in the reaction along with oxygen?
4
30 sec
8.6(B)
Q.
In the formation of ammonia (NH3), which element from the periodic table is bonded with nitrogen?
5
30 sec
8.6(B)
Q.
During the formation of sulfur dioxide (SO2), which element from the periodic table combines with sulfur?
6
30 sec
8.6(B)
Q.
In the chemical reaction forming table salt (NaCl), which element from the periodic table is combined with sodium?
7
30 sec
8.6(B)
Q.
In the production of hydrochloric acid (HCl), which element found on the periodic table is combined with hydrogen?
8
30 sec
8.6(B)
Q.
Which element from the periodic table is combined with hydrogen in the formation of methane (CH4)?
9
30 sec
8.6(B)
Q.
Which element from the periodic table reacts with hydrogen to form water (H2O)?
10
30 sec
8.6(B)
Q.
In a chemical reaction, if 6 grams of carbon react with 16 grams of oxygen to form carbon dioxide, what is the mass of the carbon dioxide produced?
11
30 sec
8.6(E)
Q.
During photosynthesis, plants convert carbon dioxide and water into glucose and oxygen. If 44 grams of carbon dioxide and 18 grams of water are used, and 1 molecule of glucose weighs 180 grams, how much oxygen is produced?
12
30 sec
8.6(E)
Q.
In chemical equations, how is the conservation of mass maintained during a reaction involving hydrogen and oxygen to form water?
13
30 sec
8.6(E)
Q.
In the chemical equation for photosynthesis, 6CO2 + 6H2O → C6H12O6 + 6O2, how is mass conserved?
14
30 sec
8.6(E)
Q.
In a reaction where methane reacts with oxygen to produce carbon dioxide and water, what does the conservation of mass imply about the total mass before and after the reaction?
15
30 sec
8.6(E)
Q.
If 2 grams of hydrogen react with 16 grams of oxygen according to the reaction 2H2 + O2 → 2H2O, what is the total mass of water produced?
16
30 sec
8.6(E)
Q.
In a lab experiment, 12 grams of magnesium reacts with 20 grams of chlorine gas to form magnesium chloride. According to the conservation of mass, what should be the mass of magnesium chloride produced?
17
30 sec
8.6(E)
Q.
In a reaction where iron reacts with sulfur to form iron sulfide, if you start with 56 grams of iron and 32 grams of sulfur, how much iron sulfide should theoretically be produced according to the law of conservation of mass?
18
30 sec
8.6(E)
Q.
In the decomposition of water into hydrogen and oxygen (2H2O → 2H2 + O2), how does the conservation of mass apply?
19
30 sec
8.6(E)
Q.
When 28 grams of nitrogen gas reacts with 6 grams of hydrogen gas to form ammonia (NH3), what is the total mass of ammonia produced according to the conservation of mass?
20
30 sec
8.6(E)
Q.
Which of the following is an example of a heterogeneous mixture?
21
30 sec
8.6(A)
Q.
What is a characteristic feature of elements?
22
30 sec
8.6(A)
Q.
What distinguishes a compound from a mixture?
23
30 sec
8.6(A)
Q.
Which of the following atoms is represented by the element with atomic number 6 on the periodic table?
24
30 sec
8.6(B)
Q.
When sodium (Na) reacts with chlorine (Cl), a compound is formed. Identify the compound from the periodic table that results from this reaction.
25
30 sec
8.6(B)
Q.
Which of the following elements is a noble gas located in group 18 of the periodic table?
26
30 sec
8.6(B)
Q.
Which element has 8 protons in its nucleus and is essential for respiration in most living organisms?
27
30 sec
8.6(B)
Q.
Which element is known for being the lightest metal and is found in group 1 of the periodic table?
28
30 sec
8.6(B)
Q.
Which element has the chemical symbol 'Fe' and is essential for the formation of hemoglobin in blood?
29
30 sec
8.6(B)
Q.
Which of the following best explains why water droplets form on a leaf instead of spreading out completely?
30
30 sec
8.6(C)
Q.
What property of water allows a paperclip to float on its surface without sinking?
31
30 sec
8.6(C)
Q.
How does water travel from the roots to the leaves of a plant?
32
30 sec
8.6(C)
Q.
Why can some insects walk on the surface of a pond without sinking?
33
30 sec
8.6(C)
Q.
Which of the following statements accurately compares acids and bases based on their properties and pH levels?
34
30 sec
8.6(D)
Q.
What characteristic is shared by all acidic solutions when compared to neutral water?
35
30 sec
8.6(D)
Q.
How does the pH of a base compare to the pH of pure water?
36
30 sec
8.6(D)
Q.
Which property correctly distinguishes a base from an acid?
37
30 sec
8.6(D)
Q.
What is an effect of an acidic solution on the pH of neutral water when mixed?
38
30 sec
8.6(D)
Q.
Which statement correctly describes the relationship between pH and hydrogen ion concentration in solutions?
39
30 sec
8.6(D)
Q.
If a solution has a pH of 3, what can be inferred about its properties?
40
30 sec
8.6(D)
Q.
What happens to the pH level when a base is added to a neutral solution?
41
30 sec
8.6(D)
Q.
Which substance is likely to have a pH closest to 14 and what does this indicate about its properties?
42
30 sec
8.6(D)
Q.
How does the pH of lemon juice compare to the pH of soap, and what does this indicate about their properties?
43
30 sec
8.6(D)
Q.
In a chemical reaction, if 6 grams of glucose react with 6 grams of oxygen to produce 6 grams of carbon dioxide and 6 grams of water, how does this demonstrate the conservation of mass?
44
30 sec
8.6(E)
Q.
During photosynthesis, plants convert carbon dioxide and water into glucose and oxygen. If a plant uses 18 grams of carbon dioxide and 12 grams of water, what total mass of glucose and oxygen is produced based on the conservation of mass?
45
30 sec
8.6(E)
Q.
If in a closed system, 16 grams of methane react with 64 grams of oxygen to produce carbon dioxide and water, what does the conservation of mass tell us about the total mass of carbon dioxide and water produced?
46
30 sec
8.6(E)
Q.
Consider a reaction where 40 grams of sodium chloride are formed from the reaction of sodium and chlorine gas. If 23 grams of sodium were used, how much chlorine gas was needed to conserve mass?
47
30 sec
8.6(E)
Q.
In a chemical reaction where 12 grams of hydrogen react with 88 grams of oxygen to form water, how much water is produced according to the law of conservation of mass?
48
30 sec
8.6(E)
Q.
49
30 sec
8.6(E)
Q.
In a laboratory experiment, 24 grams of magnesium react with 16 grams of oxygen to form magnesium oxide. What is the total mass of magnesium oxide produced, according to the conservation of mass?
50
30 sec
8.6(E)
Q.
During a reaction, 28 grams of nitrogen reacts with hydrogen to produce 34 grams of ammonia. How much hydrogen was used in this reaction, maintaining the conservation of mass?
51
30 sec
8.6(E)
Q.
In a chemical reaction, 50 grams of calcium carbonate decompose to form calcium oxide and carbon dioxide. If 28 grams of calcium oxide are produced, what is the mass of carbon dioxide formed according to the conservation of mass?
52
30 sec
8.6(E)
Q.
In an experiment, 20 grams of zinc reacts with 16 grams of sulfur to form zinc sulfide. According to the conservation of mass, how much zinc sulfide is produced?
