Will mark brainliest if the answer is correct vinegar and baking soda react to form sodium acetate (nac2h3o2), water (h2o), and carbon dioxide (co2). ? nac2h3o2 + h2o + co2 how many total sodium (na) atoms are expected in these reactants? a. 0 b. 1 c. 2 d. 3

Answer:   [a]:   "slate" .

Initial velocity,  u = 4.9 m/sfinal velocity = v m/sinitial height,  h₁ =  245 m    final height, h₂ = 0a = -9.8  m/s²time taken = t secondss = ut + 0.5at²⇒  (h₂-h₁) = ut + 0.5at²⇒  0-245 = 4.9t + 0.5×(-9.8)×t²⇒ -245 = 4.9t - 4.9t²⇒ 4.9t² -4.9t -245 =0solving it, we get   t = 7.59sv  = u +  at = 4.9 -9.8×7.59 = 4.9 - 74.38 = -69.48 m/svelocity is  69.48 m/s downward