Question

The correct set of the f-
number of different elements
in the equation
2K Cr_0, +8H2SO4 → 2K_SO4
+ 2Cr2(SO2)3 + 8H2O + 302
O K-2,Cr-3,0-6, H-2.5-2
K-2, Cr-2 0-6, H-2, S-3
o -2-3H
K-2,Cr-3, 0-5, H-2, S-3
O K-2 Cr-2 0-6 H-2 S-2​

Answer 1

Answer:

the f-number of an optical system such as a camera lens is the ratio of the system's focal length to the diameter of the entrance pupil ("clear aperture").[1][2][3] It is also known as the focal ratio, f-ratio, or f-stop, and is very important in photography.[4] It is a dimensionless number that is a quantitative measure of lens speed; increasing the f-number is referred to as stopping down. The f-number is commonly indicated using a lower-case hooked f with the format f/N, where N is the f-number

Explanation:

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