attached below
Just e iii) the magnitude of an angle.
Is the working out for the angle like this
sin inverse -3/5 + sin inverse 12/13 = 104.25 degrees
However, this method does not work for cosine (a-b). It only worked for sine(a-b) and tangent (a-b)
I believe BF3 is a covalent bond but when i calculate the electronegativity difference between them i get a value of 2.
The electronegativity of B=2.0 and F=4.0 therefore F-B = 2
Apparently if the Electronegativity difference lies between these values it determines what type of bond...
BF3 should be a convent bond, since two non metal elements?
However, when you calculate the Electronegativity difference of the molecule I get a value of 1.9.
0-1.7 = convalent bond and 1.7-3.3 = ionic bond
1.9 lies in the ionic bond category?
Which of the following statements best describes the structure of solid carbon dioxide:
a. it is an array of positive carbon ions and negative oxide ions
b. each carbon atom is joined by strong covalent bonds to four oxygen atoms to give an array of many thousands of atoms
c. molecules...
1)Two circles touch internally at A. The tangent at P on the smaller circle cuts the larger circle at Q and R, prove AP bisects angle RAQ?
2)PA and PB are two tangents to a circle and x is the midpoint of minor arc AB.Prove XA bisects angle PAB and XB bisects angle PBA?
3)AB and CD are...