The first one is correct cause first of all it's atomic number is 7 and second of all it's atomic mass is about 15
Supplementary angles add up to 180, so
6x+60+90 = 180 and solve for x
6x= 30
x=5
<span>Answer:
Graham's law of gaseous effusion states that the rate of effusion goes by the inverse root of the gas' molar mass.
râšM = constant
Therefore for two gases the ratio rates is given by:
r1 / r2 = âš(M2 / M1)
For Cl2 and F2:
r(Cl2) / r(F2) = âš{(37.9968)/(70.906)}
= 0.732 (to 3.s.f.)</span>
Answer:
Water gradually degrades them until the metal parts rust and the other materials deteriorate.
Explanation: