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How many grams of magnesium fluoride (MgF2) must be added to 67.3 g of water to prepare a 4.81% (m/m) solution of magnesium fluoride?
What is the chemical make-up of natural cleaners? How do these products compare to traditional cleaners? Are the active ingredients the same or different?
What is the molar ratio of initiator (2-methylpropionitrile) MW: 164.21 to sulfuryl chloride MW: 134.97 in the procedure? Why is so little initiator needed relative to the amount of chlorinating agent used
The reaction 2NO(g) + Cl2 (g) --> 2NOCl(g) is carried out in a closed vessel. If the partial pressure of {NO} is decreasing at the rate of 27 torr/min, what is the rate of change of the total pressure of the vessel?
Consider the following Balanced equation: SiO2+3C--->SiC+2CO: Complete the following table, showing the appropriate number of moles of reactant and products
A 100 g sample of an unknown liquid absorbs 2000 J of heat energy, raising the liquid's temperature from 50 ?C to 70 ?C .What is the speci?c heat capacity of this liquid.
The quadratic formula is used to solve for x in expressions taking the form of a quadratic equation: ax2 bx c = 0, Solve for x in the following expression using the quadratic formula
Butane gas is copresses and used as liquid fuel in dispossble cigarette lighter and light weight camping stoves. Suppose a lighter contains 2.74ml of butane. d = 0.579g/ml a, How many gm of oxygen are needed to burn the butane completely
how many total moles of gas are produced? B. If each mole of gas occupies 59 L under the conditions of the explosion, how many liters of gas are produced? C. Express your answer using two significant figures. How many grams OF N2are produced in th..
Consider a two state system with a difference in energy of 200 cm^-1. What is the temperature of the system if there are 5 particles in the ground state and 10 in the excited state
A sample of ammonia, NH3, contains 3.3 x 1021 hydrogen atoms. How many moles of ammonia are in this sample?
An automobile gasoline tank holds 21 of gasoline. When the gasoline burns, 84 of oxygen is consumed and carbon dioxide and water are produced. What is the total combined mass of carbon dioxide and water that is produced?
A 1.95 g sample of ascorbic acid is titrated with a 0.89 M red dye. What volume of red dye is required to reach the endpoint. molar mass of red dye= 267.08g/mol; molar mass of ascorbic acid=176.12g/mol
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