Chemistry

Chemistry, 18.07.2019 07:00, ishaanbaruah4474

In a lab experiment, you determine that an unknown substance is a solid at room temperature, has a high melting point, and dissolves easily in water. which of the following is a reasonable hypothesis based on your observations? a. the substance is an acid b. the substance is an ionic compound c. the substance is a covalent compound d. the substance is a nonmetallic compound

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Chemistry, 31.08.2019 14:10, kwhitt

Which statement best describes the properties of covalent compounds? 1. they are always solid at room temperature, are brittle, and have a high melting point. 2. they may be gases, liquids, or solids at room temperature, and have a low melting and boiling point. 3. they are always composed of an equal proportion of cations to anions. 4. they are always liquid at room temperature, and have a high melting and boiling point. 5. they are good conductors of heat and electricity, and are ductile and malleable.

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Chemistry, 06.10.2019 22:00, atlantahead7011

Which statement best describes the properties of covalent compounds? a) they are always solid at room temperature, are brittle, and have a high melting point. b) they may be gases, liquids, or solids at room temperature, and have a low melting and boiling point. c) they are always composed of an equal proportion of cations to anions. d)they are always liquid at room temperature, and have a high melting and boiling point. e) they are good conductors of heat and electricity, and are ductile and malleable.

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