Reagents 1. HCl
2. HBr
3. H2O, H2SO4
4. Br2
5. Cl2
6. H2, Pd
7. Br2, H2O
8. Cl2, H2O
9. OSO4 then NaHSO3
10. Hg(OAC)2, H2O then NaBH4
11. BH3 then H2O2, NaOH
12. O3 then (CH3)2S
13. 2 equivalents of NaNH2
14. H2, Lindlar's catalyst
15. Na / NH3
16. H2SO4, HgSO4
17. (sia)2BH then H2O2, NaOH
18. 1 equivalent of NaNH2
The above synthesis scheme was designed using the Organic Chemistry Roadmaps. In this scheme, identify the reagents necessary to accomplish the following steps in the production of (3R,4S)-3,4-dibromohexane from acetylene:
Step 4:
Step 1:
Step 3:

when 25.0 ml of 0.700 mol/l naoh was mixed in a calorimeter with 25.0 ml of 0.700 mol/l hcl, both initially at 20.0 °c, the temperature increased to 22.1 °c. the heat capacity of the calorimeter is 279 j/°c.

the equation for the reaction is:

naoh + hcl → nacl + h₂o

moles of hcl = 0.0250 l hcl ×

0.700

mol hcl

1 l hcl = 0.0175 mol hcl

volume of solution = (25.0 + 25.0) ml = 50.0 ml

mass of solution = 50.0 ml soln ×

1.00

ml soln

= 50.0 g soln

δt=t2-t1

= (22.1 – 20.0) °c = 2.1 °c

the heats involved are

heat from neutralization + heat to warm solution + heat to warm calorimeter = 0

q1+q2+q3=0

nδh+mcδt+cδt=0

0.0175 mol ×

δh

+ 50.0 g × 4.184 j·g⁻¹°c⁻¹ × 2.1 °c + 279 j°c⁻¹ × 2.1 °c = 0

0.0175 mol ×

δh

+ 439.32 j + 585.9 j = 0

0.0175 mol ×

δh

= -1025.22 j

δh=1025.22j0.0175 mol= -58 600 j/mol = -58.6 kj/mol

answer: i dont know the answer but this might

explanation:

l

i think its 100.

hope this !