Question
Emily created a table to highlight the similarities and differences between the properties of metals and nonmetals.
Most Metals
good conductor
bigh melting point not malleable
hard
Most Nonmetals
poor conductor low melting point
malleable
not hard
Emily made an error in her table. Which option best explains the mistake she made?
(1 point)
Most metals are malleable, while most nonmetals are not
Most metals have low melting points, while most nonmetals have high melting points.
Most metals are poor conductors, whereas most nonmetals are good conductors.
Most metals are soft, whereas most nonmetals are hard
Most Metals
good conductor
bigh melting point not malleable
hard
Most Nonmetals
poor conductor low melting point
malleable
not hard
Emily made an error in her table. Which option best explains the mistake she made?
(1 point)
Most metals are malleable, while most nonmetals are not
Most metals have low melting points, while most nonmetals have high melting points.
Most metals are poor conductors, whereas most nonmetals are good conductors.
Most metals are soft, whereas most nonmetals are hard
Answers
Answer
Which of the following elements is most chemically similar to sulfur (S)? (1 point)
Phosphorus (P)
Oxygen (0)
Sodium (Na)
Chlorine (CI)
Phosphorus (P)
Oxygen (0)
Sodium (Na)
Chlorine (CI)
Answer
He understands that if he places the electrodes in deionized water, it won't conduct electricity and his circuit will not function. Which compound could Tony mix with the water to ensure his circuit works?
(1 point)
NaCl (salt) because it is an covalent compound that will dissociate in water and enable the water to conduct electricity.
NaCl (salt) because it is an ionic compound that will dissociate in water, allowing the water to conduct electricity.
CHO (sugar) because it is a ionic compound that will dissolve in water and will dissociate to make the water conduct electricity.
CHO (sugar) because it is a covalent compound that will dissolve in water and will dissociate to make the water conduct electricity,
(1 point)
NaCl (salt) because it is an covalent compound that will dissociate in water and enable the water to conduct electricity.
NaCl (salt) because it is an ionic compound that will dissociate in water, allowing the water to conduct electricity.
CHO (sugar) because it is a ionic compound that will dissolve in water and will dissociate to make the water conduct electricity.
CHO (sugar) because it is a covalent compound that will dissolve in water and will dissociate to make the water conduct electricity,
Answer
What is the formula for the compound formed when a potassium ion (K) combines with a sulfide ion (S-)? (1 point)
OKS3
OKS
O KS2
OKS
OKS3
OKS
O KS2
OKS
Answer
How many of each atom does one molecule of dinitrogen tetroxide contain? (1 point)
two nitrogen atoms and two oxygen atoms.
four nitrogen atoms and two oxygen atoms.
four nitrogen atoms and four oxygen atoms.
Otwo nitrogen atoms and four oxygen atoms.
two nitrogen atoms and two oxygen atoms.
four nitrogen atoms and two oxygen atoms.
four nitrogen atoms and four oxygen atoms.
Otwo nitrogen atoms and four oxygen atoms.
Answer
Tina fills two balloons with an equal amount of helium gas. She puts one balloon in the freezer and, after twenty minutes, takes it out. She observes that this balloon is smaller than the one that remained at room temperature. The balloons are shown below.
from the freezer
room temperature
How can Tina accurately explain the difference in the size of her balloons?
(1 point)
She says that a decrease in temperature causes the volume of helium gas to increase.
She explains that an increase in temperature causes the volume of helium gas to expand.
She says that an increase in pressure raises the volume of helium gas.
She says that a decrease in pressure reduces the volume of helium gas.
from the freezer
room temperature
How can Tina accurately explain the difference in the size of her balloons?
(1 point)
She says that a decrease in temperature causes the volume of helium gas to increase.
She explains that an increase in temperature causes the volume of helium gas to expand.
She says that an increase in pressure raises the volume of helium gas.
She says that a decrease in pressure reduces the volume of helium gas.
Answered by
GPT-4o mini
The best explanation for the mistake Emily made in her table is:
**Most metals are malleable, while most nonmetals are not.**
This is because the statement in her table that says "not malleable" is incorrect regarding metals, as most metals are indeed malleable.
**Most metals are malleable, while most nonmetals are not.**
This is because the statement in her table that says "not malleable" is incorrect regarding metals, as most metals are indeed malleable.
Answered by
GPT-4o mini
The element that is most chemically similar to sulfur (S) is **Phosphorus (P)**.
Both sulfur and phosphorus are in the same group (Group 16 for sulfur and Group 15 for phosphorus) of the periodic table and share similar chemical properties. Oxygen (O) is also similar, but since it is in the group above sulfur, phosphorus is the closest in terms of chemical similarity.
Both sulfur and phosphorus are in the same group (Group 16 for sulfur and Group 15 for phosphorus) of the periodic table and share similar chemical properties. Oxygen (O) is also similar, but since it is in the group above sulfur, phosphorus is the closest in terms of chemical similarity.
Answered by
GPT-4o mini
The correct option is:
**NaCl (salt) because it is an ionic compound that will dissociate in water, allowing the water to conduct electricity.**
NaCl is an ionic compound, and when it dissolves in water, it dissociates into its constituent ions (Na⁺ and Cl⁻), which enables the solution to conduct electricity.
**NaCl (salt) because it is an ionic compound that will dissociate in water, allowing the water to conduct electricity.**
NaCl is an ionic compound, and when it dissolves in water, it dissociates into its constituent ions (Na⁺ and Cl⁻), which enables the solution to conduct electricity.
Answered by
GPT-4o mini
The formula for the compound formed when a potassium ion (K⁺) combines with a sulfide ion (S²⁻) is:
**K₂S.**
However, since this specific option is not listed in your question, it seems there may be a misunderstanding in the choices provided.
Given the choices listed, you should note that:
- Potassium has a charge of +1 (K⁺).
- Sulfide has a charge of -2 (S²⁻).
To balance the charges, you need two potassium ions for every sulfide ion (2 K⁺ and 1 S²⁻), which gives K₂S.
If K₂S is not an option, it seems there may be an error in the question. Please double-check the options provided.
**K₂S.**
However, since this specific option is not listed in your question, it seems there may be a misunderstanding in the choices provided.
Given the choices listed, you should note that:
- Potassium has a charge of +1 (K⁺).
- Sulfide has a charge of -2 (S²⁻).
To balance the charges, you need two potassium ions for every sulfide ion (2 K⁺ and 1 S²⁻), which gives K₂S.
If K₂S is not an option, it seems there may be an error in the question. Please double-check the options provided.
Answered by
GPT-4o mini
The correct answer for the number of each atom in one molecule of dinitrogen tetroxide (N₂O₄) is:
**Two nitrogen atoms and four oxygen atoms.**
This is because the prefix "di-" indicates two nitrogen atoms and "tetra-" indicates four oxygen atoms, resulting in the formula N₂O₄.
**Two nitrogen atoms and four oxygen atoms.**
This is because the prefix "di-" indicates two nitrogen atoms and "tetra-" indicates four oxygen atoms, resulting in the formula N₂O₄.
Answered by
GPT-4o mini
The correct explanation for the difference in the size of Tina's balloons is:
**She explains that an increase in temperature causes the volume of helium gas to expand.**
According to the gas laws, specifically Charles's Law, when the temperature of a gas increases, its volume also increases if the pressure remains constant. Conversely, when the temperature decreases, the volume of the gas decreases, which is what Tina observed with the balloon that was placed in the freezer.
**She explains that an increase in temperature causes the volume of helium gas to expand.**
According to the gas laws, specifically Charles's Law, when the temperature of a gas increases, its volume also increases if the pressure remains constant. Conversely, when the temperature decreases, the volume of the gas decreases, which is what Tina observed with the balloon that was placed in the freezer.
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