Which atom in each has the smallest ionization energy? Li or K
Ca or Ni
O or S
Cl or Br
C or O

Question

Students in chemistry class have been given the assignment to use flame test emission data to determine the identity of an

unknown substance. When the students put a sample of the unknown compound in the flame, blue and green colors were visible.

What could be one explanation for these results?

A)

The Bunsen burner must not be working properly.

B)

The unknown substance must be a sodium compound.

The unknown substance contained both copper and lead.

D)

It is impossible to narrow down anything about the unknown

Explanation:

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

the answer is true. hope it .