What is the mass number of an atom with 3 protons and 4 neutrons and 3 electrons

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.

Which of the following changes will decrease the total amount of gaseous solute able to be dissolved in a liter of liquid water? (2 points) decreasing temperature decreasing pressure decreasing surface area decreasing solute concentration