Answer:
The concentration of P in the pond at equilibrium is 0.034 g/m³
Explanation:
Given the total mass = 49.9 g
1 day = 24 hours
mass per hour;
Incoming mass = (49.9 g / day) * (1 day /24 hr
)
= 2.079 g/hr
Outgoing mass = 0
Mass lost due to sunlight = k
V
Given the half-life = 3.4 hours
For a first-order reaction; k, the rate constant = ln2/t, where t is the half-time
ln 2= 0.693, V= volume
k = 0.693 / t_half = 0.693 / 3.4 = 0.2038 hr⁻¹
Substituting all parameters into the equation k
V;
Mass lost to sunlight = k V
= Incoming mass per hour / kV
= 2.079 g/hr / (0.2038 hr⁻¹ x 300 m³)
=
0.034 g/m³
Co2 is indeed the correct answer, my friend.
The mass calculated for the copper piece is 290 grams. The formula for mass is given by mass = density × volume, where the density of copper is 8.96 grams per mL. The volume of the copper piece, determined by the increase in volume, equals 137 mL - 105 mL = 32 mL. Multiplying the volume by the density gives us the mass of copper: mass = 8.96 g/mL × 32 mL = 286.72 grams. Since the volume is presented with two significant figures, rounding the mass to two significant figures results in 290 grams.
From the table presented, C₆H₅O⁻ is the most frequently attached to the acidic hydrogen, due to its lower Ka (<span>acid dissociation constant).
Chemical reaction:
C₆H₅OH(aq) ⇄ C₆H₅O⁻(aq) + H⁺(aq).
Ka = [C₆H₅O⁻] · [H⁺] / [C₆H₅OH].
The concentration of hydrogen ions in a phenol-water solution is very low.</span>
The correct answer is C: 2.0 mL. This is due to the precision of the burette, which measures liquid volumes accurately with a precision of ±0.01 mL, indicating that it can reliably measure volumes around 2 mL without issue.
