Mass of potassium hypochlorite

What mass of potassium hypochlorite must be added to 450.0 mL of water to give a solution with pH = 10.20? Please see the attached file for full problem description.

Ka of nitric acid

Please see the attached file for full problem description.

Ammonia

Please see the attached file for full problem description.

molarity

Question: 5.0 mL of 12 mol NH3 / Litre solution is added to 500.0 mL of 0.050 mol AgNO3 / Litre solution. Assume the combining volumes are additive, What molar concentration of silver ion will exist in solution after equilibrium is established? Ag+ + 2 NH3 = Ag(NH3)2+ ( Kf for Ag(NH3)2+ is 1.5 x 107 ) P ...continues

College Chemistry problem calorimetry and work

One mole of water evaporates in an open container at 273 Kelvin the formula is H20 liquid---->>>>H20 gas Is work done on or by the system? w= one of the following choices state which one it is? a. 2.3 kJ b. -2.3 kJ c. 22kJ d-22kJ

Thermodynamics

How much heat is needed to heat one mole of an ideal monatomic gas from 100K to 500 K at constant volume? choices in answers are a. 5kJ b. 8kJ c. 49J d. 82kJ

Hess's Law

Using the information calculate the heat in joules of the reaction if 50.0mL of HCl is added to 50.0mL of NaOH in a coffee cup calorimeter... (See attachment for full question)

Hess's Law

Please answer step by step with solutions: A 150.0 iron bar at 330 degrees C is put in 1.00 kg water at 20.0 degrees C. What is the final temperature of the bar? (Hint: bar and water will be the same at the end ) Cs = 0.45J/(grams degree C) for iron Cs = 4.18J/(grams degree C) for water

Understanding atomic weight, atomic number, atomic composition

The atomic weight of an element is determined by adding the number of _______ and the number of ___________.

Under standing atomic structure, combination of atoms

When atoms combine, they gain or lose (a) electrons (b) neutrons (c) protons (d) nuclei (e) all of the above (f) none of the above