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calculate the amount of heat necessary to raise the temperature of 53.4 grams of ice at -50.0 degrees celsius to water at 70 degress celsius.
How much heat is released when 4.50 g of methane gas is burned CH4 (g) + 2O2(g) -> CO2 (g) + 2H2O(l) H=-890kJ
What is the value of the equilibrium constant for the neutralization of acetic acid with sodium hydroxide? The Ka for acetic acid is 1.8 ? 10-5 and the neutralization reaction of interest is CH3CO2H(aq) + NaOH(aq) -> H2O(l) + NaCH3CO2(aq).
How much heat is required to warm 1.20 L of water from 20.0 degrees C to 100.0 degrees C ? (Assume a density of for the water.)
Then the potential of the mercury cathode was adjusted to -1.80 V vs. SCE, and the quantity of electricity passed during this second electrolysis was 64.17 cou- lombs. Calculate the weight percentages of CCl4 and CHCl3 in the original sample.
the xylene that received has a density of 0.86 g/ml. Its volume is 2.0 ml, and its concentration is 0.069 g/ml. First of all, need to dilute the solution to a 1:100 ratio (ex: 69000 µg/ml to 690 µg/ml). How do dilute the solution to a 1: 100 ratio..
The boiling point of a substance is defined as the temperature at which liquid and vapor coexist in equilibrium. Use the heat of vaporization (30.91kJ/mol) and the entropy of vaporization
Cyanogen is a gas which contains 46.2 % C and 53.8 % N by mass. At a temperature of 25oC and a pressure of 750 mmHg, 1.50 g of cyanogen occupies 0.714 L.
Exactly 5.00 days later, the rate of decay was found to be 177 disintegrations per minute. Calculate the half-life, in days, for the decay of this sample.
The density of a liquid sulfur compound is 1.14 gmL1. This compound contains 23.7% sulfur. How many milliliters of the compound must be burned to obtain 6.40 g of SO2? Molar Mass SO2 64.1 gmol
bismuth oxide reacts with carbon to form bismuth metal:when 217g of Bi2O3 reacts with carbon, how many moles of Bi2O3 react?
Compounds are always composed of two or more elements. Atoms of different elements are different. Isotopes have the same number of protons but a different number of neutrons.
Calculate the pH of 0.0021 M aminoethanol (pKa = 9.38) in 0.0030 M sodium aminoethanoate (a salt of the conjugate base of aminoethanol).
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