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Toby M.
Algebra/ Chemistry tutor with 5+ years experience
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Chemistry
TutorMe
Question:

How many moles is 25 g of KMnO4

Toby M.
Answer:

1. Start with the given amount (25 g) 2. Add the molar mass with the g on the bottom and the mols on the top. (25 g KMnO4)(1 mol KMnO4 )/ (158.034 g KMnO4) 3. Cancel out the units (25)(1 mol KMnO4)/ (158.034) 4. You are left with 25 / 158.034 = 0.158 mols of KMnO4

Algebra
TutorMe
Question:

For all nonzero r, t, and z values, 16r^3tz^5 /4rt^3z^2= ?

Toby M.
Answer:

–4r^2z^3/t^2

Physics
TutorMe
Question:

An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until is finally takes flight. What is the distance the plane travels on the runway?

Toby M.
Answer:

Given: a = +3.2 m/s2 t = 32.8 s vi = 0 m/s Find: d = ?? d = vi*t + 0.5*a*t2 d = (0 m/s)*(32.8 s)+ 0.5*(3.20 m/s2)*(32.8 s)2 d = 1720 m

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