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Hard water at home contains dissolved ions (ex. Ca2+ & Mg2+) that react with soap to form a nasty gray substance. Because this gray stuff would ruin your clothes, most laundry detergents add ingredients that combine with the Ca2+ and Mg2+ ions to form insoluble precipitates that are easily washed away with the dirty water. a.) NaCl b.) Na2CO3 c.) NaNO3 d.) KI e.) Pb(OH)2 i got b but is that right?
If a mixture of 41.25 g of aluminum and 58.83 g of oxygen reacts, what mass of aluminum oxide can be formed?
Sodium carbonate reacts with hydrochloric acid as shown below in an unbalanced chemical equation. What mass of CO2 is produced from the reaction of 2.94g Na2CO3 with excess HCL
A sample of oxygen occupies 10.0 L at 4.00 atm pressure. At what temperature will the pressure equal 3.00 atm if the final volume is 8.00 L.
A liquid unknown was found to be insoluble in water and soluble in cyclohexane and alcohol; the unknown was found to have a boiling point of 58 degrees C at 670mm Hg
What volume of this gas must be burned to raise the temperature of 5.3 L of water by 5.0°C? Assume the gas is at 1.0 atm and 298 K.
If the solution is 40.0% K2CO3 by mass, what is the predicted freezing point of this solution in °C, assuming full ionization.
Draw structural formulas for all of the structural isomers of C4H10, C5H12 and C3H7Cl.
The standard free energy of formation of gaseous hydrogen iodide is 1.30 kJ/mol at 25°C. Find Kp for the reaction 2HI(g) -> H2(g) + I2(s) at this temperature.
Transition metals can combine with carbon monoxide to form compounds such as Fe(CO)5 and Co2(CO)8. If you combine 0.150 g Ni with CO and isolate 0.437 g Ni(CO)x
Calculate the amount of heat required to heat a 3.5 kg gold bar from 21 degrees celsius to 67 degrees celcius.
The enthalpy change for converting 10.0 g of ice at -25.0°C to water at 80.0°C is __________ kJ. The specific heats of ice, water, and steam are and respectively. For H2O, Hfus = 6.01 kJ/mol, and
Concrete used in road construction is reinforced using steel bars in a grid, known collectively as "rebar." After many years, rebar will begin to corrode, and the concrete will weaken.
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