URGENT! (a) A gas' pressure is 765 torr at 296k. At what temperature will the pressure be 560. torr?

(b) Which gas law is being represented above?
Boyle's Law, Charle's Law, Gay-Lussac's Law?

Answer !BOTH! questions.

Read the given expression. x = number of protons − number of core electrons which of the following explains the identity of x and its trends across a period? x is the effective nuclear charge, and it remains constant across a period. x is the screening constant, and it remains constant across a period. x is the effective nuclear charge, and it increases across a period. x is the screening constant, and it increases across a period.

Sylvanite is a mineral that contains 28.0% gold by mass. how much sylvanite would you need to dig up to obtain 77.0 g of gold? explain how you got your answer and the steps you took. you

What is the molar mass of a gas that has density of 2.054 g/l