03/03/21

final concentration of the solution
What is the final concentration of the solution when 250.0 mL of a 0.05561 M solution of Na2CO3 is allowed to evaporate until the solution volume is reduced to 55.0 mL?
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03/03/21

Maximum mass of an object
Assuming that the smallest measurable wavelength in an experiment is 0.430 fm, what is the maximum mass of an object traveling at 913 m⋅s−1 for which the de Broglie wavelength is observable?
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03/02/21

This one I am stuck....High-purity benzoic acid (C6H5COOH; ΔHrxn for combustion = −3227 kJ/mol) is used as a standard for calibrating bomb calorimeters. A 1.221-g sample burns in a calorimeter...
(heat capacity = 1365 J/°C) that contains exactly 1.370 kg of water. What temperature change is observed?My steps:-qreaction = - (1.221g HBZ) X 1 mol HBZ over 1221.2g HBZ X -3227 kJ over 1 mol HBZ... more
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03/02/21

What is the difference between crystals formed by sodium chloride and those formed by cesium chloride?
What similarities and differences am I supposed to look for?
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03/02/21

chem question help
A volume of 11.0 mL of a 0.32 M solution of hydrogen phosphate (or phosphoric acid) reacts completely with 71.0 milliliters of sodium hydroxide. What is the molarity of the sodium hydroxide solution?
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03/02/21

Copper(II) sulfate, which is commonly used in agriculture as a soil additive, has a concentration of .24 M.
Copper(II) sulfate, which is commonly used in agriculture as a soil additive, has a concentration of .24 M. If it is mixed with 1.6 L of 1.3 M lithium hydroxide, what is the volume of copper(II)... more
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03/02/21

Need help with this question
When 293g of AgNO3 are dissolved in water to form a 0.500-M solution, how many liters of solution are formed?
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03/02/21

Chemistry lab question

The permanganate ion reacts with diarsenic trioxide in an acidic solution to produce the manganese(II) and arsenate ions. The solution containing the per manganate ion was prepared by dissolving... more
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03/02/21

Chemistry Solution Stoichiometry

If 4.0 g of sodium metal completely reacts with 38.1 mL of pure water (which is in excess), what is resulting molarity of the sodium hydroxide solution?
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03/02/21

college chemistry 1
Aqueous sodium sulfate reacts with aqueous barium bromide to form aqueous sodium bromide and solid barium sulfate.Write the balanced chemical equation for the reaction. Include physical states.
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03/02/21

please help chemistry question
If 3.0 g of sodium metal completely reacts with 43.2 mL of pure water (which is in excess), what is resulting molarity of the sodium hydroxide solution?
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