-14
4X10/10=4
0.4 = 4x10-1
The sum would be 2.3x10-4 x 4x10-4 which 9.2x10-8
How can you use 2x10 to find 4x10
HNO2 ==> H+ + NO2^-Ka = 4x10^-4 = [H+][NO2^-]/[HNO2] 4x10^-4 = (x)(x)/0.100 x^2 = 4x10^-5 x = 6.32x10^-3 = [H+] pH = -log 6.32x10^-3 pH = 2.2
They can all be multiplied by a certain number to equal 40. such as 4x10= 40 5x8= 40. hope this helps!
4000000
400
The frequency is the reciprocal of the period; in this case, divide 1 / 4x10-7.
wavelength=velocity/frequency (v/f). wavelength=(3x10/4x10)=30/40=.75 meters
4x10^-1
8x10