Recent content by n108

Thanks for the help!

Chemical properties of hydrogen compounds can have vast differences depending on the state of matter that the substance is in - solid, liquid or gas. The difference in chemical properties is related to the dissociation of H+ from the hydrogen compound into solution. the dissociation of OH-...

An increase in the OH- in a solution would result in an increase in alkalinity (baseness). an increase in acidity. a pH of 7. a decrease in pH. i think it would be - an increase in alkalinity, but I am not sure help!

im pretty sure about most of them, but for formation of snow in clouds, i don't know.

Indicate if the following processes requires heat for the process to occur. a. C6H12O6 + O2---> CO2 + H2O + Heat b. Making ice cubes c. Formation of snow in clouds d. Evaporation of water e. A candle flame i think they all require heat, but I am not sure someone please help!

I needed help with this equation: 2^n = 150 / 0.5 I don't know how to solve for the unknown "n" (which in this problem is the number of half lives) if its the exponent of something. what do I do?

If there are 6.25 L of Hydrogen gas at a pressure of 1.95 ATM and a temperature of 243 K, how many grams of hydrogen are there? I know that the equation for the ideal gas law is: pV = nRT p = pressure V = volume n = number of moles R = the gas constant, 0.0821 L atm mol-1 K-1 T =...

heat is...energy, thermal energy, or a change in temperature, measured in Joules

A 0.4 kilogram sample of Aluminum at 115 degrees Celsius is put into a container containing 0.5 kilograms of water at 15 degrees Celsius. Neglecting the small amount of energy absorbed by the container and knowing that the specific heat of Aluminum is 900 kJ/kg*C, and the specific heat of the...

Thank you! So now I know the formula for aluminum oxide: Al2O3. How do I find out how many moles are needed to form 3.4 moles of aluminum oxide? The hint says: "This is a simple ratio problem. Just use the molar ratio from the balanced equation. Mass is not involved." How do I the molar ratio...

balancing equations Problem #1: Aluminum oxide is formed from the reaction of metallic aluminum with oxygen gas. How many moles of Aluminum are needed to form 3.4 moles of Aluminum oxide? Hint: This is a simple ratio problem. Just use the molar ratio from the balanced equation. Mass is not...

ok, I think my mind is clearing up a little bit...better. thanks

What is the molarity of a solution of silver perchlorate, AgClO4, if 3.2 moles of silver perchlorate is dissolved in 1.5 liters of water? Is it 2.133 M, 4.756 M, 4.8 M, or 4.810 M ? i guessed 2.133 M 2. How many moles of potassium iodide, KI, must be used to make 1.500 L of a 0.2 M solution...