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Chemistry & Physics Exercises: Problems for Students, Quizzes of Chemistry

A collection of exercises and questions covering various topics in chemistry and physics. It includes problems related to concepts like acceleration, collisions, spectrophotometry, bod calculations, and chemical reactions. Suitable for students studying chemistry and physics at the university or high school level, providing them with practice problems to reinforce their understanding of key concepts.

Typology: Quizzes

2023/2024

Uploaded on 03/25/2025

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2 documents

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If a body is thrown vertically upward and air resistance is considered, how does
upward acceleration of the body compare to the acceleration due to gravity g?
a. Smaller than g
b. Equal to g
c. Larger than g
d. None of the choices
Which of the following is conserved in an inelastic collision?
a. Chemical energy
b. Kinetic energy
c. Potential energy
d. Total energy
Why do we use blank sample in spectrophotometry?
Correcting for Background Absorbance
Establishing a Baseline
Improving Accuracy
What effects does increasing the path length in Spectrophotometry do to the
absorbance?
Beer-Lambert’s Law: A = molar absorptivity*path length*concentration, increase
Difference between crystalline and amorphous solids
Enzyme commonly used in redox reaction
ATP CoP NADPH/NADP+ ewan ko yung isang enzyme
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If a body is thrown vertically upward and air resistance is considered, how does upward acceleration of the body compare to the acceleration due to gravity g? a. Smaller than g b. Equal to g c. Larger than g d. None of the choices Which of the following is conserved in an inelastic collision? a. Chemical energy b. Kinetic energy c. Potential energy d. Total energy Why do we use blank sample in spectrophotometry?  Correcting for Background Absorbance  Establishing a Baseline  Improving Accuracy  What effects does increasing the path length in Spectrophotometry do to the absorbance? Beer-Lambert’s Law: A = molar absorptivitypath lengthconcentration, increase Difference between crystalline and amorphous solids Enzyme commonly used in redox reaction ATP CoP NADPH/NADP+ ewan ko yung isang enzyme

BOD efficiency (88% nakuha ko) Calculate ultimate BOD using BOD5 and BOD rate BODu = BODt/1-e kt, t=5, t = BODrate Calculate the height of water at 50 psi 1 psi = 2.31 ft head, 115.5 ft Calculate BOD rate given the BOD at day 7 and BOD 5 BODt = BODu(1-e -kt ), let BODu = BOD 7 /(1-e -k ), sub into BOD 5 equation and find k Compressibility Factor of Liquid approachs (1, 0, etc.) Calculate force exerted by cylinder if height is 1.5 m, area of 2 ends are 12cm2(ata) and mass is 40kg(ata). F = mg, F = 409.8 = 392 N Calculate mass of (COOH)2 given volume and concentration of the compound (nakalimutan ko compound) Calculate the mass of acetic acid in mass of vinegar sample if volume and mol/L of NaOH(ata) is required to neutralize the solution. Acetic acid = monoprotic, hence simple MNaOHVNaOH*MWacetic acid Compute the normal temp of something If 5mol% of butane and 95mol% argon is required, calculate for the mass required of Argon to satisfy the percent if butane was first put into the tank, volume of tank is 40dm3, constant pressure of 1 atm, and constant temp

Ano ang correct about sa relationship ng theoretical something and real something (laging mas mataas yung theoretical) ??? Compute for the dissociation constant