6. Calculate the number of grams of KBr (formula wt. = 119 u) contained in 120.mL of a 0.720 M solution. a. 14.3 b. 8.64 x 10 -2 c. 10.3 d. 86.4 e. no correct response
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6. Calculate the number of grams of KBr (formula wt. = 119 u) contained in 120.mL of a 0.720 M solution.
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- 5. Compute the molarity of a solution that contains 5.62 g of Na₂CO3 in enough water to make 750.0 mL of solution. (3 pts.) 1 Q A Z 1 ption 2 W S X H cmd #3 E D C 54 R F % 5 V T G را opt + 11 { } [ 2.1 de ? 1FSC 8 1921. Brightspace A Aktiv Chemistry C D Z < Q + # At F2 @ 2 What volume in mL of 0.3000 M NaCl solution is required to produce 0.2700 moles of NaCl? W S app.101edu.co Walmart - Hiring Ce... X F3 X # 3 11. Unit 12: Late Adulthood - Develo X E JC 4 D F4 с 144 $ JU F5 R LL F ► 11 % 5 V F6 t 44 T G A 6 F7 Simulation play - Labster B Y H F8 & 7 8 U N Question 7 of 9 DELL F9 X D * 8 J F10 ( M Walmart - Hiring Center 9 F11 JI K 2 O ) O F12 L P 4 : 7 +/- PrtScr W 8 Insert { ( **Sheet 5 From the following data determine the following: Define outlier and then identify the outlier in the data. Determine if the outlier should be kept of discarded from the data. Trial 1 2 3 4 HCl (mL) 22.3 28.4 29.8 29.3 NaOH (mL) 35.2 35.1 34.9 35.0
- 12) How much water that required add to 200 ml HNU, I densly -1.285 gm/ ual) contains 46 wt% acid to Convert lo wt% acid Solution ? Ars. i 919.6 mlQ/ Prepare 0.1 N and 0.1 M of 98% H,SO, in 250 ml. M.wt of H,SO, = 98 g/mol, and its Specific density (SP.gr.) = 1.09 .The sample containing 4.2 % NaCl will be determined gravimetrically as AgCl. What weight (in milligrams) of the sample must be taken to obtain a precipitate that will weigh about 0.39 mg? FM: NaCl = 58.44 AgCl = 143.3 %3D Answer in two decimal places. Do not include units in the answer. Answer:
- CHEMY 101 SEC SEM T2 2020-21 Saved Calculate the mole fraction of KI in a solution made by dissolving 3.4 g of Kl in 5.8 g of water. 15 Multiple Choice X 01:28:11 6.4 0.59 0.060 0.064 Mc Graw HillExcess (NH4)2SO4 ( NH 4 ) 2 SO 4 was added to a 70.0 mL 70.0 mL solution containing BaCl2 BaCl 2 (MW=208.23 g/mol). ( MW = 208.23 g/mol ) . The resulting BaSO4 BaSO 4 (MW=233.43 g/mol) ( MW = 233.43 g/mol ) precipitate had a mass of 0.2192 g 0.2192 g after it was filtered and dried. What is the molarity of BaCl2 BaCl 2 in the solution?Should be 3 answers in total. Will thumbs up! Next the student conducts two different runs: In RUN 1, 10.0 mL of 5.00 M NAOH is combined with 10.0 mL of 0.010 M CO and 80.0 mL of wate In RUN 2, 20.0 mL of 5.00 M NAOH is combined with 10.0 mL of 0.010 M CO and 70.0 mL of wate The following plots were obtained for each of the runs: [crystal orange] vs time (RUN 1) In[crystal orange] vs time (RUN 1) 0.0012 0.001 -2 y--0.4463x- 7.3334 y =-0.0002x + 0.0007 R- 0.6565 R = 0.893 0.0008 4 0.0006 -6 0.0004 -8 0.0002 0.0002 -12 time (hr) time (hr) 1/[crystal orange] vs time (RUN 1) 1/[crystal orange] vs time (RUN 2) 12000 25000 10000 20000 8000 15000 6000 y = 2000x + 1000 R =1 10000 y 4000x + 1000 R =1 4000 2000 5000 time (hr) time (hr) Figure 4. Kinetic traces for the reaction between crystal orange and sodium hydroxide. What is the order with respect to CO? | Select ] What is the order with respect to NaOH? | Select ] What is the value of the averaged rate constant for the reaction above? Give…
- Example: What is the volume of HCl which is needed to prepare 100 ml of solution has 6 M conc. if you know the % of HCl equal 37 % sp.g was 1.18 g /ml. M=2%- 1000 M.wt. 1000 11.96 36.5 M,V M;V: - 6. 100 - 11.96. V: The volume will dilute to 100 mlQ1: What is the density (g/ml) of a 3.6M Sulfuric acid solution that is 29% H,So, by mass (Mwt. = 98)? Q2: Fill the blanks with suitable answers 1: The is the thing being dissolved. ......... 2: The branches of quantitative analysis are and 3. The filterability of the precipitate depend on the of practices. Q3: Which one is correct? 1. Molality changes with temperatures. 2. Molality does not change with temperatures. 3. Molarity changes with temperatures. 4. Normality changes with temperatures. Q4: What weight of pyrite ore (impure FeS,) must be taken for analysis so that the BaSO, precipitate weight obtained will be equal to one-half that of the percent S in the sample? Note: Mwt. of Ba =32, Mwt. of BaSo4 =233, Mwt. of FeS, =1191. What mass of MC| is needed to make 3000g or 109 solution? (MW: H= 1 , Cl= 35)a. 0.09 gb. 90 gc. 900 g d. 0.9 g 2. Detemine the mole faction of the solvent in a solution prepared by dissolving: 36g of CH3OH in 1000 of H2O. a. 55.55molesb. 0.02molesc. 0 98molesd. None of the above