Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
1. What H3O+ concentration corresponds to each pH value: (a) 12.600; (b) 8.300; (c) 4.200?
2. Convert each H3O+ concentration to a pH value.
b. 8.25 ×10-9M
3. Convert each H3O+ concentration to a pH value.
a. 0.053 M
b. 0.0000000159 M
4. Calculate the H3O+ concentration from each pH: (a) 2.40; (b) 8.70.
5. Calculate the value of [-OH] from the given [H3O+] in each solution and label the solution as acidic or basic:
(a) [H3O+] = 2.2 ×10-11M;
(b) [H3O+] = 3.8 ×10-2M.
6. Calculate the value of [H3O+]from the given [-OH]in each solution and label the solution as acidic or basic:
(a) [-OH]= 7.1 ×10-9M;(b) [-OH]= 9.4 ×10-4M.
7. Calculate the value of [OH-] from the given [H3O+] and label the solution as acidic or basic.a. 1.9 ×10-5Mb. 7.8 ×10-10M
8. Calculate the pH of each aqueous solution: (a) 0.0066 MHCl; (b) 0.000012 M KOH.
a researcher requires 20l if a buffer solution with pH=4.25. How many moles of formic acid, and sodium fomate, could be dissolved in the solution to make this buffer, if none of the equillibrium concentrations should be under 0.100M?
how much ice in grams would have to melt to lower the temperature of 353 ml of water from 26 degrees c to 6 degrees c?
You are titrating an unknown acid with a 0.228M NaOH standard solution. It requires 19.1 mL of the NaOH solution to reach the endpoint of the titration.? How many moles of H+ reacted with the OH- from the NaOH in the titration
A 53.5 g of an ideal gas of molecular weight = 10.5 g/mol is confined at a pressure of 50 kPa. The density of the gas is 0.164 g/L. Compute the temperature of the gas in degrees Celsius.
Plot the radial functions for the 2s and 2p orbitals to explain how shielding plays into the relative energy of 2p electrons to 2s in a multi electron system. What is the relative energy in a hydrogenic (1 electron) system.
Enter the sign of H° and S° for the condensation for CO2. Enter the sign as either + or -. Also indicate the temperature conditions (high temperature or low temperature) that favor condensation of CO2
When 3.00 g KNO3 are dissolved in 50 g glycerol, the freezing point changes from 17.8°C to 13.6°C. What is the freezing point depression constant (Kf ) for glycerol.
One plate was placed in a chamber containing methanol, and after developed it showed one spot with an Rf value of 0.97. The other plate was placed in a chamber containing hexane
The temperature of an ideal gas is raised from15.0 deg C to 38.0 deg C at constant pressure. The final volume of gas is 2.79 L. Explain what was the initial volume of gas
A 1790 g sample of a solution of the solute methanol in the solvent ethanol that has a concentration of 4.50 % by mass CH3OH is available. Calculate the amount (g) of methanol that is present in the sample.
How many molecules (not moles) of NH3 are produced from 2.73×10?4 of H2 ? Express your answer numerically as the number of molecules.
Propose stepwise sythesis of 2-cholor-4-nitrobenzoic acid starting from benzene
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd