Chemistry
If 1 mol L of 2.0 mol L hydrochloric acid is diluted to form a solution with concentration 0.2 mol L, A. What is the final volume? B. how much water must be added to the original acid? Use C1V1= C2V2, thanks in advance
Trig
Find the exact values of sin 2 theta, cos 2 theta and tan 2thea using the double angle formula sin theta = 3/4 , pi/2 < theta < pi
Chemistry
Discuss the effect of the 'extra' hydroxyl groups on the physical properties of diols and triols, compared to alkanols that have only one hydroxyl group. HINT: Consider the polar nature of the hydroxyl group Really need help for this!!!
Chemistry
List commercial, everyday products whose manufacture starts with ethylene or ethene. I have already listed down plastic bags and milk containers. Could petrol be one of them?
Maths
If (x-k, where k is integral, is a factor of the polynomial P(X)=2x3-3x2-12x-7, what possible values may k have? Working out please! I only have 7 as a possible answer need one more
Chemistry
Calculate the molarity of the solutions made by dissolving the following amounts of solute in water and making the volume up to the stated value. 5.0mol nitric acid in 2.0L Do I just find the molarity for nitric acid only, because when I write out the balanced equation, the ra...
Maths
Find the equation of the locus of the point P(x,y) which moves so that it's distance from the point (0,3) is equal to its distance from the line y=-3 Show that the point (-6,3) lies on the locus Please help me with thisand also show working out
Maths
If Q(x)=x^2 for x less than or equal to 1 =ax+b for 1<x<2 = x^2-5 for x greater than or equal to 2 Find the values of a,b if Q(x) is to be continous for all x Please help with this urgently and also show all working out on method to do it Thanks
Maths
X squared-(k+3)x+4k=0 Please help me find the value of k for which there are equal roots but of opposite sign Working out please thanks
Maths
M squared is greater than or equal to 36 How to find m I only have one set of answers for m and that is m is greater than or equal to 6 How to find the second set? Working out please
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