Evaluate (0.631mm)/(8.60kg)2 to three significant figures and express in si units using an appropriate prefix.

solution;

The SI unit of measurement of length is meters and weight it is kilograms. So we have to convert mm to m and kilogram as it is.

Now since we need 3 significant digits, 10-6 is not significant as exponent is not significant. So the required answer is 8.53.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer