The 95 % confidence limit for Zn in certain water sample is 2.90± 0.25 mg/L. Circle the correct statement below. 1. O There is a 5% probability that u lies outside the range of 2.65 - 3.15 mg/L. 2. OThere is 95% probability that u lies outside the range 2.65 - 3.15 mg/L. 3. OThere is 5% probability that u lies within the range 2.65 - 3.15 mg/L. 4. OThere is a 0.25% systematic error in the above determination of Zn in water

A heterogeneous mixture is the one which O has one phase O has a uniform composition throughout O has uniformly distributed particles O has no uniform composition throughout

pH Range and Colors 1 2 4. 5. ndicator Bromcresol green 7. yellowC blue Congo Red Methyl Yellow Thymol Blue Methyl Violet blue Jorange-red Dyellow lyellow red redl yellow violet Screen reader user: Diagram show pH range of various indicators: Bromcresol green is yellow up to 3 to 6 and above blue; Congo Red is up to 3 blue to 5 and above orange red; Methyl Yellow is up to 2 red to 4 and above yellow; Thymol Blue is up to 1 red to 3 and above yellow; Methyl Violet is 0 yellow to 2 and above violet. End of diagram. These are the colors that appear when a drop or two of the indicator is added to the unknown. Bromcresol green: Blue Methyl Yellow: Yellow Thymol Blue: Yellow Methyl Violet: Violet HINT: Rainbow color order is red, orange, yellow, green, blue, indigo, violet.

See Figure 2-3. Do an orbital analysis of C-2 (arrows on lines like we did in class). It has a pi bond to C-1 and a pi bond to C-3. What is its hybridization? sp3 sp2 O sp

HO HO HIO4 HO MeOH OH SH 12 MeOH

+ NaH DMSO Drawing + OH Br

In the Cytochrome P450-catalyzed mono-oxygenation cycle shown below, which transition results in a low-to-high spin conversion of the heme? B A S = 1/2 R-H S = 5/2 H₂O N R-H R-H N-H Fev F (electrophile) R-OH - H₂O R-H OH III R-H + PhIO H* E' (nucleophile) N R-H Felll E (nucleophile) Fell 0₂ binding step R-H Fe S R-H Fell C (reductant) D

what should i write for the final answer with the right number of sig figs?

H-C₁-C₂ bond angle is [Select] C₁-C2-C3 bond angle is [Select] e C2-C3-C4 bond angle is [Select] e C3-C4-H bond angle is [Select] degrees. degrees. degrees. degrees.

Milk of magnesia with [H3O+] = 2.0 X 10-9M