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In a flame test experiment, sodium gives the brightest and most persistent color in the flame. Do you think that potassium could be detected visually in the presence of sodium by heating this mixture in a flame? Explain your answer?
how much heat energy in calories is needed to raise the temperture 10.0g of water 6.0C
The heat of fusion of thallium is 21 j/g, and its heat of vaporation is 795j/g. The melting anf boiling points are 304 degress celcius. The specific heat of liquid thallium is 0.13 j/g*c.
A cylinder equipped with a piston expands against an external pressure of 1.58 atm. If the initial volume is 0.485 L
In the reaction BaCO3 + 2HNO3 -> Ba(NO3)2+CO2+H2O, what mass of Ba(NO3)2 can be formed by combining 55g BaCO3 and 26g HNO3?
The concentration of the HCl solution is 0.1016 M HCl. What volume of 0.1338 M Ba(OH)2 would neutralize 50.00 mL of the HCl solution standardized in the situation above.
What is the change in enthalpy when 18.4 g of steam at 100?C is converted to liquid water at the same temperature and pressure? The heat of vaporization of water is 40.7 kJ/mole. Answer in units of kJ.
Determine the iodide ion concentration (in molarity) in a solution containing 12.6 g CaI2 dissolved in 2750 mL of solution
Calculate the mass of ascobic acid in the whole tablet( use mass of whole tablet) c) Calculate the %error in the mass of ascobic acid in one whole tablet
A helium-filled weather balloon has a volume of 714 L at 23 oC and 759 mmHg. It is released and rises to an altitude of 4.80 km, where the pressure is 495 mm Hg and the temperature is -9oC. what is the volume of the balloon at this altitude.
Determine How many moles of Fe 3 O 4 could be formed if 9.00 mol iron react with 12.00 mol Oxygen and determine How many grams of methane is required to form 45.5g CHcl 3 ?
When 56.0 g calcium and 34.7 g nitrogen gas undergo a reaction that has a 88.0% yield, what mass of calcium nitride forms?
How many moles of HNO3 are present in 35.0 mL of a 4.50 M solution of nitric acid?
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