Question 1 (true/false worth 4 points) (03.06 lc) an instantaneous dipole occurs when a molecule's moving electrons are briefly more concentrated in one place than another, causing the molecule to become temporarily polarized.

true false

question 2(multiple choice worth 4 points) (03.06 lc) what type of intermolecular force occurs between all substances?

covalent bonding
hydrogen bonding
ion-dipole force
london dispersion force

question 3(multiple choice worth 4 points) (03.06 mc) when comparing h2, nh3, o2, and ch4, which of the following statements is correct?

ch4 has the highest boiling point because it experiences dipole-dipole forces.
h2 has the strongest intermolecular forces because it has the lowest mass. nh3 has the highest boiling point because it experiences hydrogen bonding.
o2 has the strongest intermolecular force because it experiences london dispersion forces.

question 4(multiple choice worth 4 points) (03.06 mc)

the boiling points of diatomic halogens are compared in the table.

boiling points of diatomic halogens molecule boiling point
f2 −188 °c
cl2 −34 °c
br2 59 °c
i2 184 °c
which of the following statements best explains the trends in boiling points?

the atomic size increases down the group, and this decreases the strength of the intermolecular forces.

the total number of electrons decreases down the group, and this decreases the strength of the intermolecular forces.

the total number of electrons increases down the group, and this increases the strength of the intermolecular forces.

the chances of forming a permanent dipole increase down the group and this increases the strength of the intermolecular forces.

question 5(multiple choice worth 4 points) (03.06 mc) what is the strongest intermolecular force that occurs between molecules of co2?

dipole-dipole
induced dipoles
ionic bonding
london dispersion

asap 30 mark brainliest

The correct answers are (1) True (2) London dispersion force (3) one of the option is missing, none of these three is an answer (4) The total number of electrons increases down the group, and this increases the strength of the intermolecular forces (5) London dispersion forces which are always present.

Explanation:

Given: An instantaneous dipole occurs when a molecule's moving electrons are briefly more concentrated in one place than another, causing the molecule to become temporarily polarized.

True

when the electrons moving in a molecule or an atom move towards one end of the molecule or atom the other end has a small positive pole at that time and the end where electrons move has a small negative pole. So, a dipole is formed for that instant.

(2) What type of intermolecular force occurs between all substances?

London dispersion force

remember from first part how an instantaneous dipole is formed. When a pole is formed at that instant the molecule in neighborhood can interact with the dipole that was formed. The dipole that was formed has a positive pole and a negative pole. If the neighboring molecule is present near positive pole it’s electrons will get attracted to the positive pole of the dipole. This interaction is called London dispersion force. Since every atom or molecule or ion in the universe has electrons, so there is development of instantaneous dipole in each of them and each one of them has London dispersion force acting on them.

(3) When comparing which of the following statements is correct?

one of the option is missing, none of these three is an answer.

(4)The boiling points of diatomic halogens are compared in the table.

The total number of electrons increases down the group, and this increases the strength of the intermolecular forces.

(5) What is the strongest intermolecular force that occurs between molecules of ?

London dispersion forces which are always present.

London forces are weakest forces, if other forces would have been present then we would have ignored London forces but since no other forces are present, the only choice is London forces.

is a non polar molecule, it does not have permanent dipole moment. So there are no chances of dipole-dipole, doesn’t have a positive or negative charge so even not ionic bond.

Learn more about dipole here:

link

the answer is either b or c

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.