Question

1. Mars has a surface area of 55.9 million miles². Showing all of your work and using at least four conversion steps, convert the surface of Mars to square kilometers.

Report your answer to the correct number of significant figures, in scientific notation, and with correct units.

2. A fictional element has two isotopes and an atomic mass of 89.08 amu. If the first isotope is 86 amu and the second isotope has a mass of 90 amu. Which isotope has the greatest natural abundance?

A.) 90 amu

B.)86 amu

C.) There are equal amounts.

D.) Not enough information provided.

Answer 1

o AIDUAL CAMERA SHOT ON REDMI Y3 2 we know that, mile = 1.60934 km I mile? = (1.60934)2 km? = 2.58998 km2 Guieng Surface area of Mars= 55.9 millien miles? = 55.90x 10 miles 1 mile2 2.58998 km² 55.96 106 miles ² = 2.58998 km x 55.9 x 18 miles I mele² = 144.779882x106m Wsing the principle of weast precise measurement for multiplication Sleducing significant figures, Surface area of mars = 144-88106 kant 4 significant ant figures hole [55.90 has

2.) quiens Aug. atomic mass of clement(01)=39:08 amu mass of first issotăpe (MI) = 86 amu alunolancode 2 → Its viel abundance = (1-20) quecond isotope (M2) = 90 amu Let its mass We know that, M = Mox + M2 (1-x) 89.08 = 86X + 90 (1-x) 89.08 86X 490-90x 89.08-90= 86X-90X --0-92 . 4x X = 40.92 74 X or Xdo= 0.23X100 = 23% Reli abundance of first cisomer239 si Pelative abundance gf second = (100-23) 10% asomer = 77% : Second usomer with atomic mass 90 amu has greatest matus ad abweibre SHOT ON REDMI Y3 AIDUAL CAMERA