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Home Question Bank Chemistry Archive 2024 November 14

Chemistry Questions from Nov 14,2024

Browse the Chemistry Q&A Archive for Nov 14,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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MULTIPLE CHOICE QUESTION How many different elements are in this compound? The following reaction reaches equilibrium in an enclosed container: \( 2 \mathrm{CO}(\mathrm{g})+\mathrm{O}_{2}(\mathrm{~g})=2 \mathrm{CO}_{2}(\mathrm{~g}) \) Some CO gas is added to the reaction mixture. How will the amount of \( \mathrm{CO}_{2} \) be affected as the reaction returns to equilibrium? (A) increase (B) Decrease (C) Remain the same Determine the sign of the free energy for the following reaction. How would its spontaneity be described? \( \mathrm{CH}_{4}(\mathrm{~g})+2 \mathrm{O} 2(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \quad \Delta \mathrm{H}=-890.3 \mathrm{~kJ} / \mathrm{mol} ; \quad \Delta \mathrm{S}=+186.3 \mathrm{~J} / \mathrm{mol}-\mathrm{K} \) A Spontaneous at all temperatures B Spontaneous at low temperatures only (C) Spontaneous at high temperatures only (D) Not spontaneous at any temperature A student places 0.88 mol of NaCl in a beaker and adds enough water to form 1.55 L of solution. What is the molarity of the solution? A student places 0.88 mol of NaCl in a beaker and adds enough water to form 1.55 L of solution. What is the molarity of the solution? Add vour answer A 2.65 g sample of potassium nitrate is dissolved in 114 g of water. What is the percent mass by mass for the resulting solution? Add your answer A sample of magnesium sulfate is placed in a beaker. Water is added and the mixture is stirred, creating a solution. Which substance is the solute, and which is the solvent? A) Magnesium sulfate is the solute; water is the solvent. B Magnesium sulfate is the solvent; water is the solute. (C) Both magnesium sulfate and water are solutes. (D) Both magnesium sulfate and water are solvents. 4) Las concentraciones de iones de hidrógeno en los quesos van desde \( 4 \times 10^{-7} \mathrm{M} \) hasta \( 1,6 \times 10^{-5} \mathrm{M} \). Determinar el rango correspondiente en las lecturas del pH. A 9 L cylinder of hydrogen contains gas molecules under 9.12 atm and 284 K . How many moles of hydrogen does the cylinder contain? weather balloon filled with helium gas has a volume of 23 L at 1.03 atm . What is the volume of the balloon after its pressure drops 0.77 atm during its ascent? Add your answer
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