Question

Due Date=Sun, Sep 01, 2019, 23:59:00 Current Time=Sun, Sep 01, 2019, 22:01:06 Please submit the following problems. In order to include Scientific Notation, utilize E. For Example, 2.35X10 can be written as 2.35E5, make sure there are two decimals. No nee to include units, just type the number. Given Values- Number A=0.395 Number B = 473 Number C = 8864 Number D=1 Number E = 80661 Number F = 505 Number G = 4252 Element Chromium Symbol Cr Atomic Weight (g/mol) = 52 1) Determine the number of significan figures for A: Your Answer 2) Change Number B from mlo mm: Your Answer 3) Change Number Cfrom MPa to Pa Your Answer 4) Change Number D from ksi to psi: Your Answer 5) Change Efrom sec to hours: Your Answer = 6) Change F from kN to N: Your Answer 7) Change Number A kips to lbs.: Your Answer

Answer 1

a) Significant digits in A = 0.395 are 0 before non zero numbers are not significant so in 0.395 have three significant digits = 3,9,5

b) 1 m = 1000mm so 473m = 473E3 mm

c) 1MPa = 10e6 Pa so 8864 MPa = 8864E6 Pa

d) 1 Ksi = 1000 Psi Ans

e) 1hr = 3600 sec so 80661 sec = 80661/3600= 22.4058 hours

f) 1 KN = 1000N so 505 KN = 505E3 N

g) 1 Kips = 1000 lbs so 0.395 Kips = 395 lbs

h) 1mm = 10e6 nm so 473 mm = 473E6 nm

i) in 1 moles = 6.022 * 10E23 atoms

j) for given element chromium molecular mass = 52g

given mass = 10 g

no of moles = 10/52 = 0.1923 moles

No of atoms = 6.022 * 0.1923 *10e23= 1.15807 *10E23 atoms