Answer:
I think the answer is B. the number of students choosing each color.
Explanation:
They attract each other
Answer: oxygen
20.0
NaOH = (25.0) (0.100m) \ 0.125M = 20.0mL
A. 2NO + O2 -> 2NO2
B. 4Co + 3O2 -> 2Co2O3
C. 2Al + 3Cl2 -> Al2Cl6
D. 2C2H6 + 7O2 -> 4CO2 + 6H2O
E. TiCl4 + 4Na -> Ti + 4NaCl
I think the answer is A - they used X-ray analysis.