Great explanation Ninja but I think you made an error.
(12.01) ÷ (6.022*1023) You have assumed the brackets which is not an unreasonable assumption
12.01 is the same thing as 1.201 x 101
You would have been better off to have left it as 12.01 but it doesn't matter.
(1.201 x 101) ÷ (6.022 x 1023)
(1.201 ÷ 6.022)(101 ÷ 1023)
.1994354 x 10-22 Good to here
this is the same as
(1.994354 x 10-1) x 10-22 It is 10-1 NOT 10+1
1.994354x 10-23
Round down to 4 significant digits.
1.994 x 10-23
74$${\mathtt{X}}{\mathtt{\,\small\textbf+\,}}{\mathtt{69}}{\mathtt{\,\small\textbf+\,}}{\mathtt{420}} = {\mathtt{489}}{\mathtt{\,\small\textbf+\,}}\underset{{\tiny{\text{Error: Unknown Identifier}}}}{{\mathtt{X}}}$$
(12.01) ÷ 6.022*1023
12.01 is the same thing as 1.201 x 101
(1.201 x 101) ÷ (6.022 x 1023)
(1.201 ÷ 6.022)(101 ÷ 1023)
.1994354 x 10-22
this is the same as
(1.994354 x 101) x 10-22
1.994354x 10-21
Round down to 4 significant digits.
1.994 x 10-21
This method is known as scientific notation. It helps when your dealing with really big or really small numbers. You could also write this as 0.0000000000000000000000199435
Great explanation Ninja but I think you made an error.
(12.01) ÷ (6.022*1023) You have assumed the brackets which is not an unreasonable assumption
12.01 is the same thing as 1.201 x 101
You would have been better off to have left it as 12.01 but it doesn't matter.
(1.201 x 101) ÷ (6.022 x 1023)
(1.201 ÷ 6.022)(101 ÷ 1023)
.1994354 x 10-22 Good to here
this is the same as
(1.994354 x 10-1) x 10-22 It is 10-1 NOT 10+1
1.994354x 10-23
Round down to 4 significant digits.
1.994 x 10-23