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#1) For the following reaction at 25oC, ΔHo= -1069 kJ and ΔSo= 289 J/K
A +4B → 3C + 3D
What is ΔGoat 442oC in kJ?
#2) A stock solution of NaOH is 0.800 M. What volume of this solution (in mL) is needed to prepare 2.00 L of 0.290 M NaOH?
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..
dimethylpropyl p-toluenesulfonate is dissolved in acetic acid (75C), solvolysis yields five different products. Suggest reasonable structure
The element cesium (Cs) freezes at 28.4 degree celsius, and its molar enthalpy of fusion is delta H fusion =2.09kJ/mol. a.) when molten cesium solidifies to Cs (s) at its normal melting point, is delta S positive or negative? b.)calculate the valu..
A 2.55 g sample of titanium metal chemically combines with chlorine gas to form 10.45 g of a titanium chloride. What is the empirical formula of the sample and what is the percent by mass of titanium and chlorine in the sample
a 10.00g sample of toothpaste contaning stannous fluoride gives0.145g precipitate of stannous phosphate.what is the percentage of snf2 in the toothpast sample.
The molecular formula of glycine (an amino acid) is NH2CH2COOH, the molecular mass is 75.07grams/mole. If 10 glycines are joined together by a dehydration reaction to make a polypeptide, what would the molecular mass of the polypeptide equal
Calculate the frequency of the light emitted when an electron in a hydrogen atom makes each of the following transitions.
Define in common language, with appropriate instance the role played by redox-type reactions in the formation of photochemical smog.
What are the concentrations of a weak formic acid (HCOOH) anf formate ions (HCOO-) in a 0.350 M formate buffer, pH 4.25? (pKa = 3.75): The formic buffer is composed of weak formic acid and its formate salt
A pound of coffee beans yields 30 cups of coffee (4 cups = 1 ). How many milliliters of coffee can be obtained from 1.0 of coffee beans.
1. calculate the h of a solution obtained by mixing 1 l of hydrochloric acid 1.0 m with 1 litre of sodium hydroxide
The concentration of an organic pollutant in a lake water sample was found to be 32 ppb. Based on this information, 600.00 kg of the lake
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