4.25 moles x 6.022 x 10^23 atoms/mole = 25.59 x 10^23 atoms or 4.25 moles they are the same .....
sqrt (7/81) = sqrt 7 / sqrt 81 = sqrt 7 / 9 = 2.64575/9 = .29397 Whichever one you want !
re-arrange to get
2 sinx cos x = sinx divide both sides by sinx
2 cosx = 1
cosx = 1/2
x = arcos(1/2) = 60 degrees (pi/3) or - 60 degrees (- pi/3)
THAT's FUNNY !!! Good job.
I guess theis is a PEDMAS question?
y-2(3-1)^2 = 7
y-2(2)^2 =7
y - 2(4) = 7
y-8 =7
y = 15
Sulfur tetra flouride formula is SF4 so there are 4.25 moles of sulfur ATOMS in there.
Volume of a cone is given by pi r^2 h/3
V = pi x 15^2 x 67/3 = 15786.5 in^3
$1.06/in^3 x 15786.5 in^3 = $ 16,733.69
A-h-h-h-h THAT's what those little arcs symbolize ! Learned something today ! Thanx Chris....
10n ( 4n+5) - 2 =
40n^2 + 50n - 2 Is THIS what you meant?
#2 use ratios since they are similar 21 is to 14 as x is to 10
21/14 = x/10 x = 210/14 = 15= AB
