Question

Each carbon atom has a mass of 12 amu. How many carbon atoms make up an 8cm long piece of tape? The mass of 1m of tape is 0.08 g and 1amu=1.7x10^-27 kg

Answer 1

I Carbon atoms make up an gem Suppoie fice 1 tape. frece of tpe Carkon alams 2 mas mass 27 Xx 12 amu X I7x10 ka m loo I amu 64x10 27 OC X 12X1.7 X10 3.14X10 alons A 12X1-7

Answer 2

Here, we will use Conversion and use mole concept, Here given Im = 0.089 1cm = 0.08 100 = 0.00089 Therefore 8cm = 8x0.0008 = 0.0064g. Criven, mass of carbon atom = 12 amu = 12 g/mol. We know, Avogadors constant NA = 6.022 x 1023 Now, we know No of molesn= mass molare mass n = 0.0064 12. = 0.00053 mol. Now, No. of Carbon atom N=nXNA = 0.00053 x6.022 x 1023 - 0.00319 x 1023 - 3.19 x 1020 Carbon atoms,