iain

Newest questions and responses by iain
  1. chemistry higher

    calculate the volume of hydrogen produced when 6g of magnesium is reacted with 100cm of 1 mol l-1 hydrochloric acid no of moles of Mg= mass/gfm = 6/24.3 = 0.247 moles 1/2 mole of Mg= 1/2 mole of H2 = 0.247 moles x 100 = 24.7cm3 ???

    asked on April 12, 2015
  2. Maths

    The circumference of the base of a cylindrical oil drum is 204cm. Calculate the diameter of the drum.

    asked on January 1, 2013
  3. calculus

    Derivative of: h(x) = e^3x+2/e^3x-2 thanks

    asked on December 15, 2011
  4. calculus

    DERIVATIVE of: g(x) = Sq.root of x^4-8x^3+9 thanks

    asked on December 15, 2011
  5. calculus

    Find the DERIVATIVE: h(x)= e^3x+2/e^3x-2 (quotient rule)

    asked on December 15, 2011
  6. calculus

    What is the DERIVATIVE of: ln x^2 * ln 6 -(product rule)

    asked on December 15, 2011
  7. Calculus

    What are the critical numbers of the function: f(x)=2x^3-3x^2-36x+14 Thanks

    asked on December 11, 2011
  8. chemistry

    Camphor, C16H16O which has a freezing point of 174°C, has a freezing point depression constant of 40.0°C/m. Explain the usefulness and the limitation of camphor as a solvent for determination of molecular weights. For whose kind(s) of solute would

    asked on March 7, 2010
  9. chemistry

    C6H6 freezes at 5.5°C. At what temperature will a solution of 10 g of C4h10 in 200g of C6H6 freeze? The molal freezing point depression constant of C6H6 is 5.16°C/m?

    asked on March 7, 2010
  10. chemistry

    calculate the molecular weight of a substance which freezes forms a 7.00% by mass solution in water which freezes at -0.89°C.

    asked on March 7, 2010
  1. chemistry higher

    Thank you that was really helpful Dr Bob

    posted on April 12, 2015