Question

i dont understand what i am doing wrong with these

Part A The reactant concentration in a zero-order reaction was 0.100 Mafter 140 s and 4.00x10-2 M after 310 s What is the rate constant for this reaction? Express your answer with the appropriate units. Indicate the multiplication of units, necessary, explicitly either with a multiplication dot or a dash. as View Available Hint(s) ? μΑ 1 M.s koth = 1.47. 10-2 Part C The reactant concentration in a first-order reaction was 9.70x102 Mafter 45.0 s and 3.40x10-3 Mafter 75.0 s What is the rate constant for this reaction? Express your answer with the appropriate units. Indicate the multiplication of units, as necessary, explicitly either with a multiplication dot or a dash. View Available Hint(s) ? HA Units Value kist= Submit Part D The reactant concentration in a second-order reaction was 0.450 Mafter 205 s and 4.00x10-2 M after 755 s What is the rate constant for this reaction? Express your answer with the appropriate units. Indicate the multiplication of units, as necessary, explicitly either with a multiplication dot or a dash. View Available Hint(s) Value Units k2nd Submit

Answer 1

A)FO 2eno Lden Atachon G Aр- kt At Lime Ratu ontaul Jnihal Lncwtnahon Loncend Aahan 0.100M A- 4.00XID M At- 31S 140 Ne eci the Values o-100M k (76s) K(7oS) 3. 53 x 10 MS 0.06 м -0S 170S For ist ondu Acachan KE > A e c) At Jnitial Lonenid paran meud rahan at timo ZoS 2.0 10 M AH Ab9.70 x10 t 75s- YSS -2 im eqh ti) the values

- K- (30s) -2 3.40x 10 M 9,70xlb M 1) 30 Cs) K n (9. on 3-B Y 36 s) K - 2. 333 -5.683 - 30 (S) k +3. 35 3. 35 30 S For Second nde eacho AD At Ao 550S 20S S Values farting the ssos) OS0 M - | 2S M + k (ss0S) 2.22 M s) 2 2. 8 M 550S K 2 28M 0.0414 M 5 50 S