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Explain the number of moles present in H+, OH- and H2O in a reaction of 25ml of 1M HCL with 75ml of 1M NaOH?
The valence shell electron pair repulsion (VSEPR) theory states that molecules assume a shape that minimizes the repulsion between electron pairs and bonded atoms in the valence shell of the central atom.
calculate the molarity of each of the following solutions: a) .500 mol of sucrose in .200 L of a sucrose solution. b) 30.4g of LiBr in 350 mL of a LiBr solution. c) 73.0 g of HCl in 2.00 L of a HCl solution.
Exactly 500 cubic centimeters of a gas at 1 atmosphere and 0 degrees Celsius weighs 0.581 grams. The composition of the gas shows it to be composed of only carbon and hydrogen, the carbon being 92.24%. What is the molecular formula of this gas
Which response includes all of the following substances that are strong electrolytes, and no others. I. LiOHII. Ca(CH3COO)2
What is the pH of the final solution when 25 mL of 0.022 M HCl has been added to 35 mL of ) .040 M HCl at 25 deg C
how do you find the empirical formula of a compound if they don't give you percentages. For example, if they ask: what is the empirical formula for N2O4?
Calculate the pH of a solution prepared by mixing 0.800L of 0.500M HC3H3O2 with 0.700L of 0.650M C3H3O2-. Assume the volumes are additive.
Suppose you have a 90.5-gram sample of lead at 187oC. The sample of lead losses 13.5 calories of heat. The specific heat of lead is 0.038 cal/g oC. What is the final temperature of the sample of lead
A particular smoke detector contains 1.95 of , with a half-life of 458 . The isotope is encased in a thin aluminum container. Calculate the mass of in grams in the detector
A gas sample in a piston container has a volume of 2.0 liters at 1.0 atm and 27 oC. The temperature is changed such that the volume is decreased to 1.2 liters and the pressure is increased to 5.0 atm. What Kelvin temperature is needed to produce t..
All particles in the mixture have a uniform spherical radius of 0.072 mm. a) Calculate the mass of a single particle of Na2SO4 and the number of Na2SO4 particles in the mixture.
The molar heats of fusion and vaporization of argon are 1.3 kJ/mol and 6.3 kJ/mol respectively, and argon's melting point and boiling point are -190°C and -186 °C, respectively. Calculate the entropy changes for the fusion and vaporization of argo..
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