4X10/10=4
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
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
It is already in standard form.
E = h x nu = 6.626176 x 10-34 joule-seconds x 4x10^7 sec = 2.65x10^-26 Joules
They can all be multiplied by a certain number to equal 40. such as 4x10= 40 5x8= 40. hope this helps!
400
4000000
The frequency is the reciprocal of the period; in this case, divide 1 / 4x10-7.
40