Question
Question 1
A)
Hydrogen (H2) and oxygen (O2) combine to make water (H2O) in the following equation.
6H2 + 3O2 → ?H2O
How many water molecules would be produced?
(1 point)
Responses
six
six
four
four
three
three
five
five
Question 2
A)
In photosynthesis, carbon dioxide (CO2) and water (H2O) combine to form the sugar glucose (C6H12O6) in the following reaction:
6CO2 + 6H2O → C6H12O6 + ?
Assuming this equation is balanced, which part is missing from the product side?
(1 point)
Responses
12 oxygen atoms
12 oxygen atoms
6 oxygen atoms
6 oxygen atoms
6 carbon atoms
6 carbon atoms
12 hydrogen atoms
12 hydrogen atoms
Question 3
A)Which statement accurately describes what happens in a reaction when reactants become products?(1 point)
Responses
Atomic bonds break and form, constantly changing between the reactant and product compounds.
Atomic bonds break and form, constantly changing between the reactant and product compounds.
Reactant compounds bond together to form bigger product compounds.
Reactant compounds bond together to form bigger product compounds.
Reactant bonds break and atoms rearrange to form new product combinations.
Reactant bonds break and atoms rearrange to form new product combinations.
Some reactants rearrange to form products, and any leftover reactants are lost.
Some reactants rearrange to form products, and any leftover reactants are lost.
Question 4
A)
Methane (CH4) and oxygen (O2) combine to make carbon dioxide (CO2) and water (H2O) in the following unbalanced equation.
CH4 + O2 → CO2 + H2O
How many oxygen molecules are necessary in order to complete this reaction?
(1 point)
Responses
three
three
two
two
four
four
one
one
Question 5
A)
Use the equation for the formation of water to answer the question.
2H2 + O2 → 2H2O
Elements such as oxygen and hydrogen naturally exist as diatomic molecules (i.e., in a paired-atom form). Does the equation for the formation of water violate the law of conservation of mass? Why or why not?
(1 point)
Responses
Yes, it does because the diatomic oxygen molecule is not present on both sides of the equation.
Yes, it does because the diatomic oxygen molecule is not present on both sides of the equation.
No, it does not because there are two water molecules, so the bonds within the diatomic molecules were not broken.
No, it does not because there are two water molecules, so the bonds within the diatomic molecules were not broken.
Yes, it does because there are two oxygen atoms in the reactants and only one in the product.
Yes, it does because there are two oxygen atoms in the reactants and only one in the product.
No, it does not because the number and mass of atoms are conserved even though the number of
A)
Hydrogen (H2) and oxygen (O2) combine to make water (H2O) in the following equation.
6H2 + 3O2 → ?H2O
How many water molecules would be produced?
(1 point)
Responses
six
six
four
four
three
three
five
five
Question 2
A)
In photosynthesis, carbon dioxide (CO2) and water (H2O) combine to form the sugar glucose (C6H12O6) in the following reaction:
6CO2 + 6H2O → C6H12O6 + ?
Assuming this equation is balanced, which part is missing from the product side?
(1 point)
Responses
12 oxygen atoms
12 oxygen atoms
6 oxygen atoms
6 oxygen atoms
6 carbon atoms
6 carbon atoms
12 hydrogen atoms
12 hydrogen atoms
Question 3
A)Which statement accurately describes what happens in a reaction when reactants become products?(1 point)
Responses
Atomic bonds break and form, constantly changing between the reactant and product compounds.
Atomic bonds break and form, constantly changing between the reactant and product compounds.
Reactant compounds bond together to form bigger product compounds.
Reactant compounds bond together to form bigger product compounds.
Reactant bonds break and atoms rearrange to form new product combinations.
Reactant bonds break and atoms rearrange to form new product combinations.
Some reactants rearrange to form products, and any leftover reactants are lost.
Some reactants rearrange to form products, and any leftover reactants are lost.
Question 4
A)
Methane (CH4) and oxygen (O2) combine to make carbon dioxide (CO2) and water (H2O) in the following unbalanced equation.
CH4 + O2 → CO2 + H2O
How many oxygen molecules are necessary in order to complete this reaction?
(1 point)
Responses
three
three
two
two
four
four
one
one
Question 5
A)
Use the equation for the formation of water to answer the question.
2H2 + O2 → 2H2O
Elements such as oxygen and hydrogen naturally exist as diatomic molecules (i.e., in a paired-atom form). Does the equation for the formation of water violate the law of conservation of mass? Why or why not?
(1 point)
Responses
Yes, it does because the diatomic oxygen molecule is not present on both sides of the equation.
Yes, it does because the diatomic oxygen molecule is not present on both sides of the equation.
No, it does not because there are two water molecules, so the bonds within the diatomic molecules were not broken.
No, it does not because there are two water molecules, so the bonds within the diatomic molecules were not broken.
Yes, it does because there are two oxygen atoms in the reactants and only one in the product.
Yes, it does because there are two oxygen atoms in the reactants and only one in the product.
No, it does not because the number and mass of atoms are conserved even though the number of
Answers
Answered by
GPT-4o mini
**Question 1**
A) In the reaction:
\[ 6H_2 + 3O_2 \rightarrow ?H_2O \]
The number of water molecules produced would be:
\[ 6H_2O \]
So the correct answer is **six**.
---
**Question 2**
A) In the reaction:
\[ 6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + ? \]
Given that glucose contains 6 carbon atoms and combining the 6 carbon atoms from \(6CO_2\) would also mean that 6 oxygen atoms must be used in the product side. Thus, the remaining product is the oxygen that isn’t incorporated into glucose but is released as a byproduct. The answer is:
**6 oxygen atoms**.
---
**Question 3**
A) The statement that accurately describes what happens in a reaction when reactants become products is:
**Reactant bonds break and atoms rearrange to form new product combinations.**
---
**Question 4**
A) For the unbalanced reaction:
\[ CH_4 + O_2 \rightarrow CO_2 + H_2O \]
To balance it, you would need:
\[ 1 CH_4 + 2 O_2 \rightarrow 1 CO_2 + 2 H_2O \]
Which means you would require **two** oxygen molecules. So the correct answer is **two**.
---
**Question 5**
A) The equation:
\[ 2H_2 + O_2 \rightarrow 2H_2O \]
Does not violate the law of conservation of mass because the number of atoms on both sides of the equation is equal. So, the correct answer is:
**No, it does not because the number and mass of atoms are conserved even though the number of diatomic molecules may differ.**
A) In the reaction:
\[ 6H_2 + 3O_2 \rightarrow ?H_2O \]
The number of water molecules produced would be:
\[ 6H_2O \]
So the correct answer is **six**.
---
**Question 2**
A) In the reaction:
\[ 6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + ? \]
Given that glucose contains 6 carbon atoms and combining the 6 carbon atoms from \(6CO_2\) would also mean that 6 oxygen atoms must be used in the product side. Thus, the remaining product is the oxygen that isn’t incorporated into glucose but is released as a byproduct. The answer is:
**6 oxygen atoms**.
---
**Question 3**
A) The statement that accurately describes what happens in a reaction when reactants become products is:
**Reactant bonds break and atoms rearrange to form new product combinations.**
---
**Question 4**
A) For the unbalanced reaction:
\[ CH_4 + O_2 \rightarrow CO_2 + H_2O \]
To balance it, you would need:
\[ 1 CH_4 + 2 O_2 \rightarrow 1 CO_2 + 2 H_2O \]
Which means you would require **two** oxygen molecules. So the correct answer is **two**.
---
**Question 5**
A) The equation:
\[ 2H_2 + O_2 \rightarrow 2H_2O \]
Does not violate the law of conservation of mass because the number of atoms on both sides of the equation is equal. So, the correct answer is:
**No, it does not because the number and mass of atoms are conserved even though the number of diatomic molecules may differ.**
There are no human answers yet. A form for humans to post answers is coming very soon!