Digital ACT Practice Questions

What is the overall rate law for this reaction? Experiment Context (Reaction Orders of Reaction 2A + B -> C): Chemists studied the initial rate of formation of ...

Based on Table 33, under anaerobic conditions, yeast produced substantially greater quantities of: Experiment Context (Metabolic Byproducts of Saccharomyces cer...

Why did the anaerobic culture consume nearly four times more glucose (48.6 g vs 12.4 g) than the aerobic culture? Experiment Context (Metabolic Byproducts of Sa...

Under anaerobic conditions, the biological function of converting pyruvate into ethanol and CO2 is to: Experiment Context (Metabolic Byproducts of Saccharomyces...

Based on Table 34, doubling the slit separation d at a constant screen distance (from 0.10 mm to 0.20 mm) causes the fringe spacing y to: Experiment Context (In...

If the red laser (632.8 nm) were replaced with a violet laser (405.0 nm) at d = 0.20 mm and L = 2.0 m, the fringe spacing would: Experiment Context (Interferenc...

The bright fringes in the interference pattern are produced by: Experiment Context (Interference Fringe Spacing of Laser Light): Students directed a 632.8 nm he...

Based on Table 35, the ratio r^3 / T^2 across all four moons is: Experiment Context (Orbital Dynamics of the Galilean Moons): Astronomers compiled semi-major ax...

If a fifth satellite orbits Jupiter with an orbital period T = 14.3 days, its predicted semi-major axis r would be: Experiment Context (Orbital Dynamics of the ...

The value of the constant ratio r^3 / T^2 in a planetary system depends primarily on the: Experiment Context (Orbital Dynamics of the Galilean Moons): Astronome...

Based on Table 36, adding 2 drops of HCl caused the pH of pure water to drop by 3.15 units, whereas the phosphate buffer pH dropped by only: Experiment Context ...

The phosphate buffer resists changes in pH upon the addition of HCl primarily because: Experiment Context (Acid-Base Buffering Capacity of Phosphate Buffer): Bi...

Between 25 drops and 60 drops of HCl, the phosphate buffer experienced a rapid drop in pH from 6.95 to 4.20 because: Experiment Context (Acid-Base Buffering Cap...

Based on Table 37, increasing organic matter from 0% to 8% causes available water capacity (AWC) to: Experiment Context (Soil Water Retention vs Humus Content):...

Organic matter improves water retention in sandy soils primarily because: Experiment Context (Soil Water Retention vs Humus Content): Soil scientists amended sa...

A farmer seeking to protect drought-sensitive crops while maintaining adequate drainage would benefit from amending sandy soil with organic matter because: Expe...

Based on Table 38, the gas evolved at the cathode is produced at twice the volume of the gas at the anode. The cathode gas is: Experiment Context (Stoichiometry...

The half-reaction occurring at the cathode (reduction) during water electrolysis is: Experiment Context (Stoichiometry of Aqueous Water Electrolysis): Students ...

Why was sodium sulfate (Na2SO4) added to the water rather than running current through pure deionized water? Experiment Context (Stoichiometry of Aqueous Water ...