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To find out the time taken for a radioactive element to decompose.
The thermal decomposition of a compound is of first order. If the half life of the compound is 120 min, how long will it take for 90 percent of the compound to decompose?
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A cleaning solution is found to have a [OH-] = 3.2 x 10 -12 M. What is the [H 3 O + ] and is the solution acidic or basic?
Suppose 68 g of carbon monoxide is reacted with 8g of hydrogen gas to produce methanol (chemical formula CH3OH or CH4O) a) Calculate the theoretical yield of methanol. b) If 3.57 x 10^4 of methanol is recovered, what is ...
Dr. Pepper has 40.0g of sugar per 12 oz. of liquid. Calculate the molarity of this solution. Put that molarity into your regression line and calculate the density (all other things being equal) of this sugar solution. Sh ...
If 62.8 g Ca react with 92.3 g HCl according to the reaction below, how many grams of hydrogen gas will be produced, and how many grams of the excess reactant will be left over? Unbalanced equation: Ca + HCl → CaCl2+ H2 ...
One method to produce nitrogen in the lab is to react ammonia with copper (II) oxide: NH3(g) + CuO(s) Cu(s) + H2O(l) + N2(g). After using 40.0 grams of NH3, 15.5 grams of N2are produced. What is the percent yield of nitr ...
Why does the temperature of a solution increase if the reaction is exothermic? For example, in the precipitation of silver iodide, delta H is -110.7 kj. Why is this reaction exothermic and why does it cause the solution ...
For the reaction between permanganate ion and sufite ion in basic solution, the unbalanced equation is: MnO 4 - + SO 3 2- MnO 2 + SO 4 2- When this equation is balanced using the smallest whole number coefficients po ...
1. Reacting molecules or ions in a solution at room temperature are in constant motion and collide. Some collisions lead to formation of product and some don't. what determines a reaction will take place. 2. Is there any ...
When 45.0 g of an unknown nonvolatile nonelectrolyte is dissolved in 500.0 g of water, the resulting solution freezes at -0.930 °C. What is the molar mass of the unknown substance? K f = 1.86 °C/ m for water.
A 15-gram sample of neon is placed in a sealed container with a constant volume of 8.5 liters. If the temperature of the container is 27ºC, which of the following expressions gives the correct pressure of gas? The ideal ...
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SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless
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