Chemistry
1. When 20cm^3 of a gaseous Allene burns in an excess of oxygen, 60cm^3 of carbon dioxide are formed. Both volumes are measures at r.t.p. What is the formula of alkene? Is it C3H6 or C6H12 and why? 2. A student investigate the reaction of vegetable oil with hydrogen. 100cm^3 o...
Chemistry
1. What does 'the time taken to reach completion decreases if 20cm^3 of hcl containing 4mol/dm^3' means? How to work out to find the concentration? 2(a)What does concentrated hcl means? (b)What does dilute hcl means? Which will react faster or slower / a or b? Thanks s...
Maths
The braking distance of a car is directly proportional to te square of it's speed. When the speed is p metres per second, the braking distance is 6m. When the speed is increased by 300%, find (a) an expression for speed of the car (b) the braking distance (c) the % increas...
Math
Banana bought 3 companies for A :$20000000 B : $250000000 G : $350000000 He made a profit of $(9.6x10^6) when he sold the companies. He also made a profit of 25% on A and loss of 10% on B. Find the percentage profit he made on G. How do I do this? What are the fixed...
Math
Why 72 + 2x = 11x ? Would you be able to list some of the common sentences for forming this type of equations? Thanks!! :)))
Math
Thanks!!! :) is there any shorter ways? :)))
Math
A piece of rope is cut into three pieces in the ratio 2:7:11. If the longest piece is 72cm longer than the shortest piece, find the length of the original rope. Ps: how do I do this type of question? What are the fixed steps?
Chemistry
Why during melting, particles gain energy and vibrate more, until they are able to overcome the forces that hold them in their fixed position? Why during boiling, particles gain kinetic energy and move quickly until they can completely break the forced holding them together? W...
General question
Alright and thanks!
General question
Hi. Is there any ways that I can post the questions up here using pictures? As some of the questions requires diagrams to be solved. Thanks a lot.
For Further Reading
