an engineering team designs a rocket that flies faster and requires less fuel than other rockets. however, the rocket explodes the first time it is launched. which step of the engineering process would have shown that there was a potential problem?

a.
evaluate the results.

b.
make a plan.

c.
know the background.

d.
do the work.

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

The two naturally occurring isotopes of chlorine are 35cl (34.969 amu, 75.77%) and 37cl (36.966 amu, 24.23%). the two naturally occurring isotopes of bromine are 79br (78.918 rm amu, 50.69%) and 81br (80.916 amu, 49.31%). chlorine and bromine combine to form bromine monochloride, brcl. 1. how many peaks will be present in a mass spectrum for brcl? the four combinations of molecule possible given these four isotopes are: 81br37cl, 81br35cl, 79br37cl, and 79br35cl. 2. what are the masses of the four different brcl molecules? express the masses using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.

Which metals are called noble metals