A) Fe(s) + Cl²(g)=> FeCl³ b) Na²CrO⁴(ac) + CaS(ac)=> CaCrO⁴=> +Na²S(ac)
c) C²H⁶ + O²=> Co² + H²O
d) Cl² + H²S=> HCl + S

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.

The answer is c.  h+  and oh−  react to form water (h2o). i just took the test and i got it right. hope this !