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Molecular compounds boil at much higher temperatures than do ionic compounds true or false?
This is false. Ionic compounds have higher boiling points than molecular compounds. For example, the boiling point of the ionic compounds copper(II) oxide, CuO, and sodium chloride, NaCl are 2,000 degrees C and 1,413 degrees C, respectively. The boiling point of the molecular compounds carbon tetrachloride, CCl4, and water, H2O are 76.72 degrees C and 100 degrees C, respectively.
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Is Compounds that are similar to water in molecular mass all exist as solids true or false?
False. Compounds that are similar to water in molecular mass can exist in various states of matter depending on their chemical properties. For example, compounds like ethanol and methanol, which have similar molecular masses to water, can exist as liquids at room temperature.
Molecular compounds have relatively high boiling points?
Molecular compounds typically have lower boiling points compared to ionic compounds because of weaker intermolecular forces between molecules. The boiling points of molecular compounds increase with increasing molecular size and polarity. However, they generally have lower boiling points compared to ionic compounds due to the nature of the forces holding the molecules together.
True or false Low melting points and lack of eletrical conductivity are properties of molecular compounds?
True. Molecular compounds have low melting points because their intermolecular forces are weaker compared to ionic or metallic compounds. They also do not conduct electricity well because they lack free-moving charged particles.
When the temperature of a medium increases the speed of sound decreases true or false?
False. In general, the speed of sound increases as the temperature of a medium increases. This is because higher temperatures lead to greater molecular motion, which increases the speed at which sound waves can travel through the medium.
Is it true or false that isomers have the same physical properties because the chemical formulas are identical?
False. Isomers are compounds with the same chemical formula but different molecular structures, leading to variations in their physical and chemical properties. These differences can include differences in boiling point, melting point, solubility, and reactivity.
Is Compounds that are similar to water in molecular mass all exist as solids true or false?
False. Compounds that are similar to water in molecular mass can exist in various states of matter depending on their chemical properties. For example, compounds like ethanol and methanol, which have similar molecular masses to water, can exist as liquids at room temperature.
Molecular compounds have relatively high boiling points?
Molecular compounds typically have lower boiling points compared to ionic compounds because of weaker intermolecular forces between molecules. The boiling points of molecular compounds increase with increasing molecular size and polarity. However, they generally have lower boiling points compared to ionic compounds due to the nature of the forces holding the molecules together.
The volume of a gas becomes greater at higher temperatures True or false?
True
Are Ionic compounds named using numerical prefixes?
No, Ionic compounds are named using the names of the individual ions that make up the compound. Numerical prefixes are used in naming molecular covalent compounds.
True or false Low melting points and lack of eletrical conductivity are properties of molecular compounds?
True. Molecular compounds have low melting points because their intermolecular forces are weaker compared to ionic or metallic compounds. They also do not conduct electricity well because they lack free-moving charged particles.
Does charges must be balanced when writing formulas for molecular compounds?
Yes, charges must be balanced when writing formulas for molecular compounds in order to achieve neutrality. This involves adjusting the number of each element present in the formula to ensure that the total positive and negative charges add up to zero.
When the temperature of a medium increases the speed of sound decreases true or false?
False. In general, the speed of sound increases as the temperature of a medium increases. This is because higher temperatures lead to greater molecular motion, which increases the speed at which sound waves can travel through the medium.
Is it true or false that isomers have the same physical properties because the chemical formulas are identical?
False. Isomers are compounds with the same chemical formula but different molecular structures, leading to variations in their physical and chemical properties. These differences can include differences in boiling point, melting point, solubility, and reactivity.
Is it true or false molecular compounds that dissolve in water do not conduct electricity because no charged ions are present?
True. Molecular compounds that dissolve in water do not conduct electricity because they do not dissociate into charged ions when dissolved. Since they do not produce free ions that can carry an electric current, they are unable to conduct electricity in aqueous solutions.
is the layer of the atmosphere where weather occurs is the thermosphere true or false?
False. The majority of weather occurs in the troposphere.
Are compounds made up of elements?
false
The kinetic molecular theory descibes the behavior of matter in terms of particles in motion is true or false?
false
