A new thermometer is being developed using volume of gas. A balloon is filled with air and calibrated for room temperature to have a volume of 1000 ml. Some time later that week the balloon is measured to have a volume of 900 ml. If room temperature is 300 kelvin, what would the new temperature be? The balloon does not leak.

The new temperature is 270 kelvin

Explanation:

We use the gas law that relates volume and temperature to find the new temperature

This is the Charles’ law and it states that volume and temperature are directly proportional.

Mathematically;

V1/T1 = V2/T2

From the question , V1 = 1000 ml, V2 = 900 ml while T1 = 300 k and T2 = ?

it is T2 we are trying to calculate

Changing the subject of formula;

V2T1/V1 = T2

(900 * 300)/1000 = T2

T2 = 270000/1000

T2 = 270 kelvin

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.