Chemistry, 21.06.2019 21:30 KnMcdonaldk93906

Which substances have the lowest melting points: ionic covalent, or metallic

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The study of chemicals is called chemistry. There are two types of solution in the chemistry and these are acid and base.

The correct answer to the question is as follows:-

What are moles?The mole is the base unit of the amount of substance in the International System of Units.It is defined as exactly 6.02214076×10²³ elementary entities, which may be atoms, molecules, ions, or electrons.

According to the question, the lowest melting point is covalent bond due to sharing to electrons

Hence, the correct answer is a covalent bond.

For more information, refer to the link:-

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Answer from: Quest

Answer: abeexplanation:

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.

Answer from: Quest

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

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Which substances have the lowest melting points: ionic covalent, or metallic...

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