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Home Question Bank Chemistry Archive 2024 November 09

Chemistry Questions from Nov 09,2024

Browse the Chemistry Q&A Archive for Nov 09,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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Check ALL that are true of \%T, It is a logarithmic scale (uneven increments) on the spectrophotometer As increases, absorbance decreases It is a measure of the percent of light that goes through a sample The darker the solution, the lower the \%T It a linear scale (even increments) on the spectrophotometer Relación entre unidad de medida mol y su cantidad. Utilizando la conversión de la unidad de medida mol, encuentre cuántos moles son una determinada cantidad de moléculas o cuántas moléculas hay en una determinada cantidad de moles, según corresponda ( 2 pts \( \mathrm{c} / \mathrm{u} \) ). ¿Cuántas moléculas hay en 4.5 moles de \( \mathrm{H}_{2} \mathrm{O}_{2} \) (peróxido de hidrógeno)? 2. Calcula cuántos moles hay en \( 5.0 \times 10^{24} \) moléculas de \( \mathrm{SO}_{3} \) (trióxido de azufre). 0.50 L of a \( 4.0 \mathrm{MHNO}_{3} \) solution is added to water so that the final volume is 8.0 L Express your answer using two significant figures. 140 mL of a \( 30.3 \%(\mathrm{~m} / \mathrm{v}) \mathrm{LiNO}_{3} \) solution Express your answer using two significant figures. \( 7,25 \times 10^{46} \) molos en R: \( 5.0 \times 10^{24} \) 3. ¿Cuántos átomos de cloro hay en 3.0 moles de \( \mathrm{CCl}_{2} \mathrm{~F}_{2} \) (diclorodifluorometano)? \( C \mathrm{Cl}_{\varepsilon} \mathrm{F}_{\tau} \) Tienes 2.5 moles de oxigeno molecular \( \mathrm{O}_{2} \) ¿Cuántos átomos de oxigeno tienes en total? \[ , 5,5 \mathrm{~mol} \times 6.0 \] 1 mol Calcula el número de átomos de nitrógeno en 0.75 moles de \( \mathrm{N}_{2} \mathrm{H}_{4} \) (hidrazina). If I contain 2.83 moles of gas in a container with a volume of 45.6 liters and at a temperature of \( 384 . \mathrm{K} \), what is the pressure inside the container in atm? A closed container in lab contains a sample of oxygen gas. When the temperature in lab is 12.0 degrees Celcius, the pressure in the container is 10.6 atm . What would the temperature in lab be (in Celcius) if the pressure in the container was 19.5 atm? Assume the mol and volume of the container are constant. Record your answer as a number with the correct significant figures.
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