Answer choice would be D, answer choice B, is the boxes net force. Velocity = distance/time. The correct answer is D. I hope this helps!
Answer:
300 kg
Explanation:
The number of people in the city, p = 400,000
The number of capsules of oseltamivir each person consumes per day, n = 2 capsules
The number of days each person consumes the oseltamivir capsules, t = 5 days
The mass of oseltamivir in each capsule, m = 75 mg
The mass of oseltamivir needed to treat all the people in the city, <em>M</em>, is given as follows;
M = n·t·m·p
∴ M (in milligrams) = (2 × 5 × 75 × 400,000) mg = 300,000,000 mg
1,000,000 mg = 1 kg
∴ 300,000,000 mg = 300 kg
The mass of oseltamivir needed to treat all the people in the city, <em>M</em> = 300 kg
Answer:
0.007756M KHP; 0.0009695 moles NaOH reacts; 0.03488M NaOH.
Explanation:
Potassium hydrogen phthalate, KHP, is a salt used as standard to determine concentration of basic solutions as NaOH solutions.
To find molarity of the KHP solution we need to convert mass of KHP to moles and divide this in 125mL = 0.125L:
<em>Moles KHP -Molar mass: 204.22g/mol-:</em>
0.198g * (1mol / 204.22g) = 0.0009695 moles KHP
<em>Molarity:</em>
0.0009695 moles KHP / 0.125L = 0.007756M KHP
NaOH reacts with KHP as follows:
NaOH + KHP → Na⁺ + KP⁻ + H₂O
That means 1 mole of NaOH reacts per mole of KHP, that means moles of NaOH that reacts are = Moles of KHP added:
0.0009695 moles NaOH reacts
In 27.80mL = 0.02780L the NaOH was contained. Molarity is:
0.0009695 moles NaOH / 0.02780L =
0.03488M NaOH
