Compare and contrast three terms in terms of: a. materials used how the tests are performed b. purpose and c. similarities and differences in results COMPARE CONTRAST Benedict Test Reagent Test lodine Test
Q: 11) Calculate the cell potential for the following electrochemical cell at 25°C. Sn(s) I Sn2+(aq,…
A: Sn/Sn2+(aq,0.022) // Ag+(aq,2.7)/Ag(s)
Q: a common preservative used in hematology and blood bank
A: Different types of preservatives are used as per the laboratory requirement. Preservatives used in…
Q: What is the aqueous molar solubility of leau(i, = 4.00x10-36 Kop Pb3 (AsO.),(6) 3PB²*(aq) + 2ASO…
A: Ksp = [Pb2+]3 [AsO43-]2 using this formula we can calculate the molar solubility
Q: What is the most common filter paper used in the laboratory? A. Cellulose fiber filter B. Glass…
A: Given: Three types of filter paper Cellulose fiber filter Glass fiber filter Membrane filter To…
Q: _7. Statement 1: All food additives are carcinogenic. Statement 2: Food additives must be avoided as…
A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: Pungent smell of urine is due to what chemical reaction? a. nitrogen to nitrate b. urea to…
A: The urine that we excrete is pungent smelling. It contains a lot of waste products that must be…
Q: A student performs an experiment to measure theboiling point of pentane and measures it at…
A: The student's percent error has to be calculated,
Q: t was known to treat skin diseases. It was used for laundering and washing with much less effort. t…
A:
Q: Hydrogen, propane and methane are primary fuels. A. True B. False
A: For Example, primary energy sources include petroleum, natural gas, coal, biomass, flowing water,…
Q: 29. A 275 mL sample of gas is kept at 25°C. What volume will the gas occupy at 100.°C? 30. A 575 mL…
A:
Q: Draw the reactants that would react to form this cyclohexene derivative in a Diels-Alder reaction.…
A: The reaction between a conjugated diene and a dienophile (which is an alkene) gives cyclohexene or…
Q: Define the following classification of chemicals. Give at least three examples each. a. special-…
A: Special-Purpose Reagent: chemicals that have been prepared for a specific application. Included…
Q: Which of the following statements about lab safety is FALSE? a. Use of contact lenses is not…
A: Chemistry lab safety
Q: Recent use and development of perfumery
A: Perfume is an ancient art that is fairly slow to develop, despite major technological advances such…
Q: 26. Calculate the empirical formula from the information given below: a. 63.5% Fe; 36.5 % S d. 25.9%…
A: Calculation of empirical formula: As per our guideline we have to answer first three questions…
Q: D. CI Nal acetone LONa E. A CI DMSO (solvent)
A: Product of following reaction can be made by applying appropriate reaction mechanism.
Q: 13. Easily soluble in water? A. Aminazin B. Riboflavin C. Thiamine bromide (chloride) D.…
A: Since we know that vitamin B and C soluble in water... And vitamin A, D, E, K is fat soluble....
Q: The most common chemical route of entry is: a. ingestion b. inhalation c. skin / eye contact d.…
A: The most common chemical route of entry is: Answer : b. inhalation
Q: wet gum and dry gum method, what apparatus is use to triturate the emulsifier, oil and water? a…
A: An emulsion can be defined as a mixture of two or more than two liquids that are immiscible with…
Q: Which of the two is more effective in disinfecting our hands especially this time of pandemic? a.…
A: The answer to the following question is-
Q: • Stock solution: 1000 mg/L Target sample concentrations: 50-400 mg/L • Create a 5-point standard…
A: Given that, The concentration of the stock solution is C1 = 1000 mg/L. The volume of the final…
Q: Which of the following compounds has a vibration that is infrared inactive? Check all that apply. O…
A: We know that a molecule must undergo a net change in the dipole moment as it vibrates. So those…
Q: What will happen if these samples is press in filter paper a. vegetable oil b. margarine c.…
A: To explain what happens when a. vegetable oil b. margarine c. mineral oil are pressed in filter…
Q: What is the purpose of Safety Data Sheets? Why are these important when handling common food service…
A:
Q: 1. Water exists in three states of matter and continuously moving through a cycle on Earth. At which…
A: Since you have posted a multiple questions, we will solve first one for you. To get remaining…
Q: Given the empirical formula of NO2 and a molar mass of 92.0 g/mol, what is the molecular formula?
A:
Q: is a quantitative analysis of water use from entry up to discharge in a system. A. Water…
A: Water Management is important for effective and efficient use of water.
Q: MULTIPLE CHOICE 1. Which of the following will give positive test when tested with Fehling’s test? *…
A: Fehling's solution can be used to distinguish aldehyde and functional groups. The compound to be…
Q: Liquor-Alcohol is a what type of chemical when ingested? a. stimulant b. depressant c.…
A: Liquor alcohol: Ethanol is the main alcoholic drink which is produced by the fermentation of grains,…
Q: 1. Explain why chemicals hazards are usually classified as either naturally occuring chemicals or…
A: A chemical hazard is a non-biological substance that has the potential to cause harm life or death.…
Q: correct use and handling of lab equipment?
A: safety rules are very important while working in chemistry lab. safety rules are the procedure which…
Q: how are nitries and nitrates added to soil?
A: Nitrite is an intermediate product in the conversion of ammonium to nitrate in the soil where the…
Q: 4. Preservatives that are usually found in cured meats, bacon, ham, corned beef and hot dogs. A.…
A: Concept based on Food preservatives and their uses.
Q: Which one hardness type that remain .after boiling process Temporary hardness. Permanent hardness.
A: There are two types of water hardness; Temporary hardness Permanent hardness
Q: Q 00 HBr (1 equiv) H₂O2 Select to Draw Select to Draw 1. NaNH2 2. CH3CH 2CH2CI 00 BEY CI
A: In the above reaction an alkyne is transformed into different compounds using different sets of…
Q: 9. 10. 11. 12. H 1. 03 2. Zn 1. KMnO4 Cold 1. CH₂l2/Zn/Cu 1. Os04 2. NaHSO3
A:
Q: What is the MOST ADDICTIVE component of cigarettes --- when you will smoke or inhale it? a. tar…
A: Cigarettes are usually addictive in nature. This is due to the presence of the some components in…
Step by step
Solved in 3 steps with 3 images
- The molarity of a solution is determined by four separate titrations or replicates, where the obtained data was 0.4120, 0.4920, 0.3920, and 0.4320 M. Calculate the standard error of the mean for the above data. O 0.00185 O 0.02160 O 0.43200 O 0.04320 O 0.01080A sample (50 mL) of a bottled water was added to a 100 mL volumetric flask and then diluted to the mark. From this stock solution, 50 mL was taken, added to a 100 mL volumetric flask and diluted to the mark. Final concentration of the serial dilution: 587.7161ppm. 1. what is the concentration in the original bottle (ppm)3 Bal, (aq)+ 2 Nag POq Caq) 7 BalPO42 + l6 Nal laq • Consider the reaction of 30.0mL of 0.270M Balz with 20.0 mL of 0.3ISM Naz PO4. Lwhat quantity in meles of Balz are preset in the solution? are produced /What quantitg in moles of precipitate E ali Bal were consumed based on the balanced chomical equation? 6) What auantity in males of Na3 Pla aro present in soluction? d) What quantity in moles of precipitate are paduced if all the Naz PO, were cansumed based on the balanced chemi.cal equation? e) which reactant is limisting f What mass (in g) of precipitate is firemed when the limiting reactant is considered?
- The air in a recently used classroom 9m x 7m x 9m tested 0.12% carbon dioxide. How many cubic meters of fresh air must be admitted per minute in order that 10 minutes later it shall contain not over 0.06% carbon dioxide. Fresh air contains 0.04% carbon dioxide. Assumeimmediate mixing of fresh with stale air. (A) 14 (B) 11 (C) 15 (D) 19 (E) 17. In C.AJ = - kt.tln [A.o]. t¹/₂ = 0.693 K In = KE •1• [A]o⋅=⋅· 100 ·/. [A] + = left . CAJO. CAJE In. [100] [s] t =.kt K= 0.693 t¼½₂ CAJO t = |n² Ch t = ln [AG] ·K CAJO K= In [At]. t Formulas Problem: Na-24 has a half life of 15 hours. How much of a 20.09. ·Sample would remain after decaying for 60 hours? Plz explain step by step. using the formulas..03.) The compound sodium thiosu Hate pentahyclrate, NazS,0g- H20, s importont commercially to the photography business as" hypo," because it has the ability to dissolve unreated silver salts from photographč film during develepment. Soplum thiosulfat pentahydrate Con be produced" by boiling elemental sulfur . o0 aque ous hunbalarced) solution of sochum sulfite SpIsst NazSOzlagy+H20(1) >Naz Sz@:SH2015)
- 1.5 x 103 uL ------> mLA clinical chemist obtained the following data for the alcohol content of a sample of blood: % C,H OH: o.084, 0.089, and o.079. Calculate the 95% confi- dence interval for the mean assuming that (a) the three results obtained are the only indication of the precision of the method and that (b), from previous6. _(6a)_ 2CUSO4. + 4NaOH » CH:COOH ±_(6b)__ + 2NA2SO4 + HzO
- A 10.00 ml sample with an unknown concentration of KNO3 was studied at 60° C. If an additional 2.4 g of KNO, were added to reach saturation. What was initial concentration of Q3 KNO, in M.Ksp = 1.6 x 10-4⁹ for Ag2S at 25 °C, what is the molar concentration of Ag* at 25 °C? M (example: type in 3.4E-5 for 3.4x10-5). Please pay attention to the number of sig. figs. in your answer. The molar concentration of S²- is M.During a routine check of the fluoride content of Gotham City's water supply, the given results were obtained from replicate analyses of a single sample: 0.815 mg/L, 0.789 mg/L, 0.811 mg/L, 0.789 mg/L, and 0.815 mg/L. Determine the mean and 90% confidence interval for the average fluoride concentration in this sample. Report the mean and the confidence interval using the "real rules" for significant figures. mean: 0.804 90% confidence interval: 2.32 x10-4 Incorrect mg/L mg/L