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If the mass of the tablet analyzed from the previous question was 1.247 grams, what is the mass effectiveness of the tablet?
A solution to replace potassium loss contains 38 M/EqL each of K+ and Cl-. How many moles of K+ are in 2.0 L of the solution?
The radius of a iron atom is 124 pm. How many iron atoms would have to be laid side by side to span a distance of 1.71 mm?
What is the pH of the solution created by combining 11.50 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? mwith 8.00 mL of the 0.10 M HC2H3O2(aq)?
what is the volume of the bubble when it reaches the ocean surface where the pressure is 1.00 atm and the temperature is 18 C?
Three solutions are mixed to form a single solution. One contains 0.2 mol Pb(C2H3O2)2, the second contains 0.1 mol Na2S, and the third contains 0.1 mol CaCl2. Write net ionic equations for precipita
What is the maximum amount of O2 in grams that can be obtained from 2.00 x 102 g of nitroglycerin? B) What is the % yield if you actually generate 6.55g. C) Is this an exothermic or endothermic reac
How much heat (kJ) is required to change 8.13 g of ice at its normal freezing point to steam at 100oC? The specific heat of water is 4.184 J/(g · oC), the molar heat of fusion at 0oC is 6.01
four flasks each contain 100 mL of aqueous solutions of equal concentrations at 25 degrees Celsius and 1 atm which flask has the solution with the lowest freezing point.
A cook wants to heat 1.37 of water from 27.0 to 100.0 .If he uses the combustion of natural gas (which is exothermic) to heat the water, how much natural gas will he need to burn? Natural gas produ
Determine the mass (in grams) of water that will result in a change in energy of 2.54 kJ when water reacts with excess nitrogen dioxide according to the following balanced thermochemical equation.
What molar ratio of benzoate ion to benzoic acid would be required to prepare a buffer with a pH of 5.20? [Ka(C6H5COOH) = 6.5 * 10-5]
How much heat (in ) is evolved in converting 1.00 of steam at 160.0 to ice at -55.0? The heat capacity of steam is 2.01 and of ice is 2.09 . The heat of fusion of ice is 6.02 kJ/mol and the heat of
Which of the following is a neutralization reaction?
If a reaction called for a minimum of 0.5 moles of table sugar, C6H12O6, and there was only one jar of sugar available for you to use which contained 32.5 grams, could you carry out the reaction with
There are about 1,200,000 autos .each auto emits 3.1g NO2 and 1.6g CH4 per vehicle mile. Each auto travels 30 miles round trip per day. How much NO2 and CH4 in g/day is emmited in the air daily?
At room temperature (20), milk turns sour in about 63 hours. In a refrigerator at 3, milk can be stored three times as long before it sours. Estimate the activation energy of the reaction that cause
Determine which half-cell will undergo oxidation and which will undergo reduction, identify anode and cathode, and calculate the voltage for the cell.
From your understanding of collniative properties, how would you design an experiment to measure the freezing point of a material which freezes at -2degree celcius using the same apparatus used in t
a sample containing 1.50 moles of neon gas has a volume of 8.00 liters. what is the new volume if 25.0g of neon is added.
A 500 gram sample of aluminum pellets (specific heat capacity = 0.89 J/degrees C x grams) 10 gram sample of iron pellets (specific heat capacity= .45 J/ degrees C x g) are heated to 100 celsius. mixtu
The can says that exposure to temperatures above 130°F may cause the can to burst. What is the pressure in the can at this temperature?
If 352 g of magnesium reacts with excess oxygen to produce 296 g of magnesium oxide, what is the percent yield for the reaction?
From your understanding of colligative properties,how would design an experiment to measure the freezing point of a material which freezes at -2degree celcius using the same apparatus in the labora
if the ethyl alcohol at 35 degree rise through 8.36 cm in a capillary tube of radius 0.20 mm , What is surface tension.