If a 320.0 ml sample of a gas is cooled at constant pressure from 55.0ºc to 30.0ºc, its new volume is
ml?

New volume is 295.61 mL

Explanation:

According Charles's law, at constant pressure the volume of a fixed mass of a gas and its absolute temperature are directly proportional.

Mathematically;

When the variables are varied then we have a constant equivalent to;

In this case, we are given;

Initial volume, V1 = 320.0 ML

Initial temperature, T1 = 55 °C or 328 K

New temperature, T2 = 30 °C or 303 K

We are required to calculate the new volume

This can be done by replacing the values of each variable in the equation;

we get;

           = 295.61 mL (2 d.p.)

Thus; the new volume is 295.61 mL

a. hope i'm right

explanation:

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.