Hydroxide ion concentration and pH

How would I convert a hydroxide ion concentration of 3.75 x10 -6th power to pH?

solving for Kw

I have the following data: Kw = 5.47x10 -14th temperature = 50 degrees celcius [H3O+] = x pH = x how do I find the value for [H3O+] and how do I find the value for pH?

determining rate equation

Could someone please help me with this lab. these were the times i recorded in lab for each of the three experiments in minutes. I don't know what to do. Exp1 Exp2 Exp 3 3.07 4.04 5.20 3.10 4.19 5.18 3.04 4.15 5.24

rate of expression and order of expresion

See attached file.

Heat reaction

4. Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 40. cm3. If the combustion of this mixture releases 845 J of energy, to what volume will the gases expand against a constant pressure of 650. torr if all the energy of combustion is converted into work to push back the piston?

Heat capacity

A 5.00 g sample of aluminum pellets (specific heat capacity = 0.89 J/°C · g) and a 10.00 g sample of iron pellets (specific heat capacity = 0.45 J/°C · g) are heated to 100.0°C. The mixture of hot iron and aluminum is then dropped into 97.7 g of water at 24.2°C. Calculate the final temperature of the metal and water mixtur ...continues

Enthalpy

see attachment Consider the following reaction. CH4(g) + 2 O2(g) CO2(g) + 2 H2O(l) H = -891 kJ Calculate the enthalpy change for each of the following cases. (a) 3.00 g methane is burned in excess oxygen. (b) 3.00 103 L methane gas at 738 torr and 21°C is burned in excess

enthalpy

In a coffee-cup calorimeter, 1.10 g of NH4NO3 is mixed with 76.0 g of water at an initial temperature of 25.00°C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.93°C. Assuming the solution has a heat capacity of 4.18 J/°C · g and assuming no heat loss to the calorimeter, calculate the ...continues

enthalpy

see attachment

Rate Processes

The decomposition of benzene diazonium chloride (C6H5N2Cl, molar mass = 141 g/mol) at 50 degrees Celsius follows the first order kinetics rate law with the reaction equation: C6H5N2Cl-->C6H5Cl + N2, and has a half-life of 10.8 minutes. Exactly one liter of a solution of 10.0 g/L of benzene diazonium chloride is reacted and the g ...continues