bliss

an iron supplement is used to treat anaemia and 50mg of iron 2 is required per tablet.if the iron compound used in the tablet is FeSO4.7H2O,what mass of this compound would be required per tablet to provide the desired amount of iron 2?

a sample of compound C,H,N and O with a mass of 0.6216 was found to contain 0.1735g C,0.01455g H,0.2024g N.Its molecular mass 129.calculate its epirical and molecular formulas.

What volume of 0.010M silver nitrate will exactly react with 20ml of 0.0080M socium chloride solution?

3. For the reaction between Cu and Sn the potentials are given below; Cu2+(aq) +2e- -----------> Cu(s) Eºcathode = 0.34 (half-cell potential) Sn(s) -----------> Sn2+(aq) + 2 e- Eºanode = - 0.14 (half-cell potential)

3. For the reaction between Cu and Sn the potentials are given below; Cu2+(aq) +2e- -----------> Cu(s) Eºcathode = 0.34 (half-cell potential) Sn(s) -----------> Sn2+(aq) + 2 e- Eºanode = - 0.14 (half-cell potential) Calculate the E.M.F (Voltage) of the ce...

6. Given the equation below, how many moles of each reactant were there if 13.7 moles of N2(g) is produced? 4NH3(g) + 6NO(g)→5N2(g) + 6H2O(g)

Given the equation below, if 3.87×1023 particles of Sb2S3(s) are reacted with excess Fe(s), what mass of FeS(s) is produced? Sb2S3(s) + 3Fe(s)→2Sb(s) +3FeS(s)

) A chord AB of length 13cm is drawn in a circle centre O at a distance of 5cm from O. Find the radius of the circle. Stop at 1 d.p.(b) TA and TB are tangents to a circle centre O. TOC is a straight line and <ATB = 56°. Calculate <ACO.

(a) Find the resultant of the following coplanar forces acting at point O: 44N in direction 54°, 77N in direction 90°, 60N in direction 146°, 88N in direction 245°. Directions are measured anticlockwise from the positive x-axis. (b) If y = (x2 – 2x + 5)(3...

(a) Simplify the following: (i) i345 (ii) 32/(-5i) (iii) 6/(7-8i) (iv) 9/(-8+7i) (b) Find the nature of the stationary points on the curve y = 4x3 – 3x2 – 6x + 2

thank you

i nee help