- Determine the amount in moles of the following: a. 12.15g Mg b. 1.50 × 1023 atoms F?

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What is cycle time for astm? Diameter of a wheel 80cm. If the wheel rotates through an angle of 200degrees, how many cm does it move? Show steps please!? Solve the equation for x.
e^x = 85? Make a conjecture about the next item in the sequence.1, -4, 9, -16,? Could someone help me with these math problems? I can't figure them out. Solve the linear equation;
x+2y=15
y=-2x+0 9x-12y=-3
-12x+16y=4?