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What is the geometry of a BF3 molecule?

The molecule is 'trigonal planar'.This is because the central atom, boron, is attached to three fluorine atoms, and each fluorine atom repels the other fluorine atoms as much as possible. The only configurat...
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Answered by Lauren S. • Chemistry tutor
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find 12% of £550 (non calculator)

First find 10% which is £55Next find 1% which is 55/10 = £5.50As 12% = 10% + 1% + 1%,12%= £55 + £5.5+ £5.5= £66
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Answered by Sachin V. • Maths tutor
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How many thirds are there in 9?

In 1 there are 3 thirds so in 9 there will be 3x9 thirds which is 27 thirds.
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Answered by Sachin V. • Maths tutor
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give the values of x when 2x^2+5x-3=0

First we need to find two numbers that multiply to make ac and add to make b which are -6 and 5 in this case.The two numbers that do this are 6 and -1. Now we separate the 5x into 6x and -x. Putting this int...
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Answered by Sachin V. • Maths tutor
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A ball is thrown downwards from a height of 10m with speed of 5m/s, assuming g=10m/s^2, calculate the final velocity of the ball when it hits the ground

First recall the suvat equation: v^2=u^2+2as. It is always handy to draw a diagram in physics to illustrate the problem. Next, using u=5, a=10, s = 10, solve for v in the suvat equation, arriving at the fina...
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Answered by Sachin V. • Physics tutor
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