The student repeats the same experiment with 0.192g of magnesium instead of nickel, using the same volume of 0.150moldm-3 HCl. Explain whether the volume of h2 gas produced will be greater than, smaller than or the same as the value you have calculated.

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.

The temperature of a chemical solution is originally 21 ? c . a chemist heats the solution at a constant rate, and the temperature of the solution 75 ? c after 1212 12 minutes of heating. the temperature, tt t , of the solution in ? c is a function of x , the heating time in minutes. write the function's formula.

Similarly fie each expression 18,19,20