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Two hypothetical ionic compounds are discovered with the chemical formulas XCl2 and YCl2, where X and Y represent symbols of the imaginary elements. Chemical analysis of the two compounds reveals that 0.25 mol XCl2 has a mass of 100.0 g and 0.50 mol YCl2has a mass of 125.0 g. • a. What are the molar masses of XCl2 and YCl2? • b. If you had 1.0-mol samples of XCl2 and YCl2, how would the number of chloride ions compare? • c. If you had 1.0-mol samples of XCl2 and YCl2, how would the masses of elements X and Y compare? • d. What is the mass of chloride ions present in 1.0 mol XCl2 and 1.0 mol YCl2? • e. What are the molar masses of elements X and Y? • f. How many moles of X ions and chloride ions would be present in a 200.0-g sample of XCl2? • g. How many grams of Y ions would be present in a 250.0-g sample of YCl2? • h. What would be the molar mass of the compound YBr3?
the combustion of butane produces heat according to the equation 2c4h10g 13o2g 8co2g 10h2ol hdegrxn -5314 kjmol.
How much boiling water would you need to raise the bath to body temperature (about 37c ). Assume that no heat is transferred to the surrounding environment.
cisplatin a compound used in cancer treatment is prepared by reaction of ammonia with potassium
Which of the following sets of quantum numbers or electron configurations cannot exist in a hydrogen atom? Why? a) n=2, l=2, m1=0 b) n=3, l=0, m1= -1 c)1p^3 d)3f^6
The emission spectrum of an unknown element contains two lines-one in the visible portion of spectrum and the other
The equilibrium internuclear distance of deuterium iodide, DI, is 160.4 pm, where 1 pm = 1x10-12m.The relevant atomic masses are: mD = 2 amu and mI= 127 amu
The decay constant for strontium- 90 is 0.0247 y^-1. how many grams of strontium-90 remain if 10.0g decay for exactly 60 years.
A CD player and its battery together do 500 kJ of work, and the battery also releases 250 kJ of energy as heat and the CD player releases 50 kJ as heat due to friction from spinning
pKa of a carboxylic acid group found on a molecule of DOM is 4.2 and pKa of An amino group found on a molecule of DOM is 9.3. Explain how pH influences the ability of these groups to bind to metals. Illustrate how well each of these groups would b..
Write a line angle formula of each constitutional isomer of dimethylcyclohexane. Write the IUPAC name of each isomer.
Assuming that the total pressure of the gases is 1.52 and that their mole ratio is 94 : 4.0 : 1.5 : 0.50, calculate the partial pressure (in atmospheres) of each gas.
If 1.02 g KHP (molar mass = 204.2 g/mol) is titrated with 28.34 mL of NaOH, what is the concentration of NaOH?
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