A sample of argon at 300. °C and 50.0 atm pressure is cooled in the same container to a temperature of 0 0C. What is the new pressure if the volume and amount of gas do not change?

Water is a polar solvent and hexane (C6H14) is a nonpolar solvent. Which of the following correctly describes the solubility of the solute in the given solvent?

Which of the following descriptions of a subatomic particle is correct? 

Which of the following correctly describes the process of inspiration (air entering the lungs)? 

Which of the following elements is a nonmetal? 

For the following question(s), consider the following equation.              2Mg + O2  → 2MgO   How many grams of magnesium are needed to react with 16 g of O2 ? ( molar mass Mg = 24.00 g , O2 = 32.00 g)

The heat of fusion for water is 80. cal/g. How many calories of heat are released when 20.0 g of water at is frozen to ice? 

 A potato contains 20 g of carbohydrate. If carbohydrate has a caloric value of 4 kcal/g, how many kcal are obtained from the carbohydrate in the potato?

What is the answer, with the correct number of decimal places, for this problem?        4.392 g + 102.4 g + 2.51 g = 

Show that the triangle with vertices  A(4, -1), B(8, -6), and C(-1,-5)  is a right triangle by using the converse of the Pythagorean Theorem. Also, Find the area of the triangle.