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Predict whether the entropy change is positive or negative for each of the following reactions. Give reasons for your predictions.2Na(s) + 2H2O(l) -> 2NaOH(aq) + H2(g)N2(g) -> 2N(g)
An aqueous solution is 48.3% by mass hydroiodic acid, HI. The density of this solution is 1.6 g/ml at 20 C. How many grams of pure HI are there in 190.0 ml of this solution at 20.0 C?
What is the name of the compound (NH4)3PO3? Why is special about this compound? Choose one answer. a. Ammonium phosphate; this covalent compound is made up of two polyatomic ions, ammonium and phosphate.
how many moles of oxygen are consumed with the combustion of one mole of butane. C4H10?
Define the possibility of stereoisomers exists, However, the addition of bromine to an equimolar mixture of cis- and trans-2-butene generates only three stereoisomers. Explain.
Which of the following is not a buffer solution?
What gas escaped during the sodium bicarbonate washing? Write balanced equations for two reactions that took place during this operation. Experiment: Preparation of synthetic banana oil
calculate the heat released when 166g of water at 23 degrees celcius is converted to ice at negative 10 degrees celcius
A titration was performed between 25 mL of 0.100 M NH3 and 0.100 M HCl. Calculate the pH of NH3 solution at the following points during the titration.
what is the relationship between the dipole moment and the bond moment? how is it possible for a molecule to have bond
Express the molar concentration numerically using two significant figures. What is the final concentration of D at equilibrium if the initial concentrations of A = 1.00M and B= 2.00M
Ethylene glycol is used as automobile antifreeze. 6.38g og this compound contains 2.47g of carbon and 0.620g of hydrogen. The rest is oxygen. The molar mass is 62.0g/mole.
The increase in the rate of reaction with temperature is due to A. increase in the number of effective collisions. B. decrease in activation energy.
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