Which statement best describes the properties of covalent compounds?
1. they are always solid...
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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In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false
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Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]
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