Polarity
Draw NH3 with all of its dipole arrows and determine if it is polar or non polar
polar
A cylinder contains a gas at 2.0 atm and 250 K, occupying a volume of 4.0 L. If the gas is heated to 350 K and the volume expands to 5.5 L, what is the new pressure?
2.036 atm
A solution contains 15 grams of NaCl dissolved in 200 mL of water. What is the w/v concentration of the solution?
7.5 %
You dissolve 5.85 g of sodium chloride (NaCl) in enough water to make 0.500 L of solution. What is the molarity of the solution? (Molar mass of NaCl=58.44 g/mol)
.200 M
If solution A, with a concentration of 100 mg/L, and solution B, with a concentration of 80 mg/L, are separated by a semi-permeable membrane, which way will the concentration gradient go?
towards solution A
Draw CH4 with all of its dipole arrows and determine if it is polar or non polar
non polar
A gas occupies a volume of 5.0 L at a pressure of 0.8 atm. If the volume is reduced to 2.5 L at constant temperature, what will be the new pressure?
1.6 atm
How much methanol (in mL) is required to prepare 300 mL of a 15% v/v solution?
45 mL
How many grams of potassium hydroxide (KOH) are needed to prepare 250 mL of a 2.00 M solution? (Molar mass of KOH=56.11 g/mol)
28.06g
How many grams of KNO₃ can dissolve in 90 mL of water at 40°C if the solubility of KNO₃ at this temperature is 80 g/100 mL?
72 g
What has a higher boiling point NH3 or NF3?
NH3
A balloon contains 3.0 moles of helium gas at 298 K and 1.0 atm. If the number of moles of gas is increased to 5.0 moles while the temperature and pressure remain constant, what will the new volume of the balloon be?
V1= 72.414 L
V2= 120.7 L
A swimming pool contains 2,500,000 liters of water. If 5 kilograms of chlorine are added to the pool, what is the concentration of chlorine in parts per million (ppm)?
2 ppm
You need to prepare a reaction that requires 0.75 mol of sulfuric acid (H2SO4). If you have a 3.00 M sulfuric acid solution, how much solution (in liters) do you need to use?
.250 L
If the temperature is -10°C, what is it in Kelvin?
263.15 K
rank the strength of IMF and give an example of each
hydrogen bonds
London dispersion
dipole-diploe
London Dispersion- all bonds
dipole-dipole H-Cl
Hydrogen Bonds O-H
A sample of gas is contained in a 10.0 L volume at 1.2 atm and 295 K. If the gas is heated to 400 K and the pressure is increased to 1.8 atm, what will the new volume of the gas be? (R=0.0821 L⋅atm/mol)
9.04 L
A solution contains 0.45 g of sodium chloride (NaClNaCl) in 250 mL of solution. The density of the solution is 1.05 g/mL1.05g/mL. What is the concentration of sodium chloride in ppm?
1714 ppm
You dissolve 2.0 mol of sugar in 4.0L of water. What is the molarity of the solution?
0.5 M
You have a stock solution of 500 ppm500ppm sodium chloride (NaClNaCl) and need to prepare 250 mL250mL of a 50 ppm50ppm sodium chloride solution. How much of the stock solution should you use, and how much water should be added?
25 mL
who will have a high boiling point NaCl or CH4
CH4
A 2.0 L container holds a gas at 300 K and 1.0 atm. If the volume of the gas is increased to 4.0 L while maintaining a constant temperature and pressure, how many moles of gas are in the container after the volume change, given that the initial number of moles was 1.0 mole?
2 mol
A solution contains 80 mL of isopropyl alcohol in a total volume of 400 mL. What is the v/v concentration of the solution?
20%
How much volume (in liters) of a 0.5 M solution contains 1.0 mol of solute?
2.0 L
A container of gas exerts a pressure of 0.8 atm. Convert this pressure to mmHg (1 atm=760 mmHg)
1.608 mmHg