Please Help NeeD IT NOWWW!!! Calculate the missing variable:

P1 = 30 atm V1 = 2 L P2 = 45 atm V2 = ???

Calculate the missing variable:
P1 = 2 atm V1 = 5 L P2 = ??? V2 = 20 L

My car tire has a volume of 3 L and a pressure of 30 psi. If I increase my tire pressure to 45 psi, what will be the new volume of my tire?

Calculate the missing variable:
T1 = 500 K V1 = 1.5 L T2 = ??? V2 = 10 L

Calculate the missing variable:
T1 = 50 K V1 = 30 L T2 = 225 K V2 = ???

A balloon is inflated at a temperature of 300 K and has a volume of 4.0 L. The balloon is then heated to a final temperature of 450 K. What is the final volume of the balloon?

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).

they are all solids.

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .