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According to the following thermochemical equation, what mass of H2O (in g) must form in order to produce 975 kJ of energy?
SiO2(s) + 4 HF(g) → SiF4(g) + 2 H2O(l), ΔH°rxn = -184 kJ
Determine the average atomic mass of boron is the natural abundance of 10B weighing exactly 10.0129 amu is 80.1% and the natural abundance of 11B weighing exactly 11.0093 amu is 19.9%.
The amount of heat needed to raise the temperature of 25 g of a substance by 15°C is 915 J. What is the specific heat of the substance?
What volume of .250 M NaOH is required to neutralize a 10mL sample of .750 M HCl.
What is the potassium concentration of a solution formed by combining 50.0 mL of 0.400 M KCl with 50.0 mL of: a) 0.100 M PdCl6, b) 0.800 M PdCl6 , c) water, d) 0.200 M PdCl6 (If The Ksp for K2PdCl6 = 6 x 10^-10)
Hydrogen gas produced in the laboratory by the reaction of zinc and hydrochloric acid was collected over water at 25°C. The barometric pressure at the time was 742.5 mm Hg.
A 35.0 mL sample of gas is enclosed in a gas tight syringe at 22 degrees celsius. If the syringe is immersed in an ice bath at 0 degrees celsius, what is the new gas volume?
what is the molar mass of glucose if 22.5g gives a freezing point of -0.930 C when dissolved in 250 g of water?
Draw out the complete structural formula for glutamic acid and glutamine. One has a pI of 5.65 and the other has a pI of 3.22
When an ionic solid is added into a solvent, you can see that the ionic solid dissociates into its respective cations and anions. The solvent molecules immediately cluster around the ions.
If a sample containing 2.11 mL of nitroglycerine (density = 1.592 g/mL) is detonated, how many total moles of gas are produced?
Assume that an incorrectly adjusted lawn mower is operated in a garage such that the combustion reaction in the engine is:
Using a sample of ferrous ammonium sulfate hexahydrate of 0.5585 grams needs KMnO 4 solution of 21.45 ml to reach a pink endpoint then calculate what will be tha molarity of the KMnO 4 solution?
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