The diagram above shows five layers of Earth’s atmosphere. Which of the following correctly labels the layers in the correct sequence starting from the Earth upwards? Question 7 options:

troposphere, stratosphere, mesosphere, thermosphere, exosphere

thermosphere, mesosphere, stratosphere, exosphere, troposphere

troposphere, exosphere, mesosphere, thermosphere, stratosphere

mesosphere, troposphere, thermosphere, exosphere, stratosphere

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.