20 points

on the basis of bonding, which of the following is true about sodium chloride when compared to sucrose?

sodium chloride crystals are softer than sucrose crystals.
sodium chloride has a higher boiling point than sucrose.
sodium chloride has a lower melting point than sucrose.
sodium chloride dissolves in water, but sucrose does not.

The answer to your question is below

Explanation:

In sodium chloride, its atoms are attached by ionic bonding.

In sucrose, its atoms are attached by covalent bonding.

Characteristics of substances that have ionic bonding high melting and boiling points, they conduct electricity in solution, are crystals, ionic bonding is stronger than covalent bonding.

Characteristics of substances that have covalent bonding have low melting and boiling points, they do not conduct heat or electricity, covalent bonding is a weak bond.

According to the previous description, the correct answer is " Sodium chloride has a higher boiling point than sucrose"

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rotten tomato score 95%

note: mark other user brainliest.!

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.