A gas that exerts a pressure of 6.20 atm in a container with a bolume of __ mL will exert a pressure of 9.150 atm when transferred to a container with a volume of 322 mL.

What mass of NaCN must be added to create 250.0 mL of a buffer solution with a pH = 9.00 and an HCN concentration of 0.100 M? The pKa of hydrocyanic acid is 9.31.

How many molecules are contained in. 900 mol O2?

Calculate the mass of 1.0 L of helium (He), 1.0 L of chlorine gas (Cl2), and 1.0 L of air (79% N2, 21% O2 by volume) at 25°C and 1 atm total pressure. Explain why a balloon filled with helium rises and why leaks of chlorine gas can be dangerous.

What is 114.1 kPa to atm

Explain how there can be so many different kinds of suntances in the world

Which best explains how heat plays a role in the movement of materials within Earth's interior?

If you start with 10ml of 0.75 m cu (no3) 2 how much cu (s) in grams should be recovered in step #7

Explain why aluminum does not react with potassium nitrate (KNO3) although it reacts with copper nitrate.

During which step of meiosis do the homologous chromosomes line up in the middle of the cell? A. prophase I B. anaphase I C. telophase I D. metaphase I

The ionization constant for water (kw) is 9.311 * 10-14 at 60 °c. calculate [h3o+], [oh-], ph, and poh for pure water at 60 °c.