Recent content by tarzanna

chemisttree: So, the original solution is 40x stronger than the sample solution. So if the sample solution contains 12.0 mg/L and total volume pipetted was 10 mL , is this the iron content of the tablet? 12.0 mg/L x 40 = 480 mg/L x 0.010L = 4.8 mg Is this correct? Thanks!

Homework Statement Find the mg of Fe in vitamin pill. Vitamin pill was dissolved in 25mL HCl which was then diluted to 250mL with water in flask. 25mL of that solution was then diluted to 100mL in another flask. 10mL of the second was diluted to 100mL in another flask. Absorbance of the last...

Homework Statement Four people, each with mass of 71.3 kg, are in a car with a mass of 1130 kg. An earthquake strikes. The vertical oscillations of the ground surface make the car bounce up and down on its suspension springs, but the driver manages to pull off the road and stop. When the...

Thanks. I calculated the answer to be 104.5 N but it was marked as incorrect by the web program I use to turn in assignments. So something isn't right.

Homework Statement A 2.75 kg object is moving in a plane, with its x and y coordinates given by x = 7t^2 - 4 and y = 5t^3 + 1, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting on this object at t = 2.35 s. Homework Equations F=ma The...