4x105 is 400000
400
4000000
4,000,000
40,000
Mutiply the digits and add the powers and so (4*10^4)(2*10^5) = 8*10^9
0.00004
(4*10)6 (40)6 4,096,000,000
How can you use 2x10 to find 4x10
7384 = 7x10^3 + 3x10^2 + 8x10^1 + 4x10^0
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
4
8x10