CHEMISTRY HIGH SCHOOL

Which substance below will exhibit hydrogen bonding between the molecules of the substance? a. CH₄
b. HBr
c. HCl
d. H₂O
e. H₂

Answers

Answer 1
Answer: I think it might just might be e

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If the momentum of a car is reduced by half, assuming mass did not change, what must also have been reduced by half?

Answers

Answer:

Velocity is halved

Explanation:

Momentum is contingent on mass and velocity. The quantity of motion in a body is called the momentum of the body.

  Momentum  = mass x velocity

Now, if mass does not change and momentum is reduced by half, it suggests that the velocity was reduced by half.

Velocity is directly related to momentum.

The usual units of density are :
cm3/ g
cm2/g
g/cm
Nm

Answers

The usual units of density are g/cm.

You may have also seen g/mL used for density. Keep in mind that 1 cm = 1 mL.

g/cm^3

To answer directly its g/cm with the little three on top.

:)

What is the 54th element on the periodic table?

Answers

Xenon is the 54th element on the periodic table .
The answer to the question is Xenon

Do all substances have the same melting point and boiling point as water?? (i think this can be answered from the particle theory!!)

Answers

They cannot, because then at room temperature metals would not be solid. THey would be in a liquid state.

You can measure length with the greatest precision using a tape measure marked in _____.A. meters
B. kilometers
C. millimeters
D. centimeters

Answers

Answer:

The answer is C

Explanation:

Precision generally means been accurate (and can be loosely interpreted to mean been exact). Length is averagely measured in meters. However, in order to get the actual length of a substance using a tape, millimeters give the most accurate length (of all the options) as it provides the length to the smallest details (of all the options provided). The illustration below shows the relationship between millimeters and the rest of the options.

while 1 kilometer = 1000 meters

          1 meter = 100 centimeters

          1 centimeter = 10 millimeters

From the relationship above, millimeters is clearly the most precise of all the options provided.
You can measure length wiht the greatest preciaion using a tape measure marked in milimeters.

Answer: C. milimeters.

Atoms are to molecules as: a) Chimneys are to roofs. b) Windows are to doors. c) Keys are to locks. d) Bricks are to walls.

Answers

Atoms are to molecules as bricks are to walls.
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