What is the hydronium ion concentration of a solution whose ph is 4.12?

In an operating voltaic cell, reduction occurs 1. at the anode 2. at the cathode 3. in the salt bridge 4. in the wire

The equation to perform the calculation is shown below. 3.45 mol KMnO, X 8 mol H2O 2 mol KMnO4 Did you set up the equation correctly? 0 Yes, and I got the correct answer. Yes, but I got the wrong answer because I made a mathematical error.

Is a candle melting in the hot sun a chemical or a physical change?

How much heat must be added to heat 0.750 g of water from 20.0°C to 40.0°C? (Remember, Q=C * m * ΔT) The specific heat of water is 4.186 joule/gram. Question 4 options: A) 322 kJ B) 126 kJ C) 62.8 J D) 62.8 kJ

Use the van der Waals equation of state to calculate the pressure of 3.60 mol of NH 3 at 485 K in a 3.90 L vessel. Use this list of van der Waals constants. P = atm Use the ideal gas equation to calculate the pressure under the same conditions.

True or False? The fatal 1930 incident in Muese Valley, Belgium, was associated with leakage of toxic chemicals from a former dump site.

How many moles of neon (Ne, 20.179 g/mol) are in 68.4 grams of neon

A 50.00 mL sample of groundwater is titrated with 0.0300 M EDTA. Of 12.40 mL of EDTA is required to titrate the 50.00 mL sample, what is the hardness of the groundwater in molarity and in parts per million of CaCO 3 by mass

Why openness is important to the progress of science?

At a certain temperature the rate of this reaction is second order in NH4OH with a rate constant of 34.1 M^-1s^-1: Suppose a vessel contains NH4OH at a concentration of 0.100M.