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Question- An infant formula was found to have 0.14 ppm melamine. What mass of melamine is there in a package of infant formula with a mass of 454g?
Here is the problem which I am struggling on, please help me!
A 224mL sample of an aqueous solution contains 2.80% MgCl2 by mass. Exactly one-half of the magnesium ions are Mg?28, a beta emitter with a half-life of 21 hours
Calculate the molar solubility of Fe(OH)2 in a buffer solution where the pH has been fixed at the indicated values. Ksp = 7.9 x 10-16. (a) pH 7.2
Problem- The Ka of a monoprotic weak acid is 8.49x10^-3. What is the percent ionization of a 0.189M solution of this acid
A hot tub is filled with 470 gallons of water, which has a density of 1.0. How many kilocalories are needed to heat the water from 67 to 109?
Do you experimental data substantiate the rule of thumb regarding the effect on the reaction rate of a 10-degree increase in reaction temperature. Briefly explain
A Nylon 4-6 polymer with an average molecular weight of 10,000g/mol is reffered to as Nylon 4-6 (10,000). If one repeat unit of Nylon 4-6(10,000). If one repeat unit of Nylon 4-6 has a molecular weight of 198.26 g/mol, how many repeat units are pr..
What are the common strong and weak acids and bases need to recognize for titration, equilibrium and anything else involving acids and bases
Identify (name) each pathway, the enzyme whose activity determines how much glucose-6-P is metabolized by that pathway, one effector (regulatory molecule) which controls the activity of each enzyme, and how the effector affects the activity of the..
A reference sample of the same size from a plant alive today has a carbon-14 activity of 160.0 counts/min. If carbon-14 has a half-life of 5730 years and what is the age of the plant fossil in years
Calculate the amount of heat liberated (in KJ) from 316g of Mercury when it cools from 74.8 celcius to 12.0 celcius.
Europium (atomic weight 151.96) has two naturally occurring isotopes with isotopic weights 150.9196 and 152.9209. what is the percentage abundance of the lighter isotope
If the valve is open and the gasses mix and assuming that the temperature is constant, what is the final total pressure
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