Q: What are the problems encountered if tablets are under or excessively lubricated?
A:
Q: 1400 Mo [D] H. [C] Pressure (in mm Hg) 1000 [A] 800 600 400 [B] E. 200 - 20 60 100 140 180 260…
A: Melting point is defined as the temperature at which a solid substance melts. In the given phase…
Q: student has a mixture of two possible compounds. The student performs recrystallization to separate…
A: Given: Mixture of two compounds are separated by recrystallization. The compound separated by…
Q: This graph shows how the vapor pressure of three liquids varies with temperature: 900 800 700 600…
A: volatility of a liquid can be identified from the vapour pressure of liquid. And the temperature…
Q: How many grams of table sugar (C12H22O11) must be added to 200 g water to raise the boiling point of…
A:
Q: How many grams of BaCl2 2H2O must be dissolved in 1.50 L of water to yield a 0.250 M BaCl2 solution?…
A:
Q: A natural product (MW = 150) distills with steam at a boiling temperature of 99°C at atmospheric…
A: Given: Molecular weight of product = 150 g/mol Molar mass of water = 18 g/mol vapor pressure of…
Q: 3. Why do oils leave a translucent spot on paper even after drying, while ethanol and water do not.
A: It's translucent. It is due to filling of the gaps between the particles of the paper by oil…
Q: II. b) What is the difference between liquid-liquid, solid-liquid and solid-phase extraction?…
A: We need to differentiate between liquid-liquid, solid-liquid and solid-phase extraction.
Q: Compare the melting points of the following molecules and explain the reason: NaC1, KCI, CsC1. Do…
A:
Q: A student measured the melting point range of an unknown solid to be 72.4 to 78.6 degrees celsius.…
A:
Q: Nano chemistry questions! True or false? 1. Bulk materials have almost constant properties…
A: The solutions are given below -
Q: 4. Basing your answer on molecular structure and intermolecular forces, rank the following molecules…
A: For a molecule to be a best lubricant it should have high viscosity index, low freezing point, and a…
Q: Describe any visual differences between the hydrated sample and the dried, anhydrous form.
A:
Q: Calculate the ppm of 40.5 mg calcium in 3.50 grams of pill. O 1.16 x10“ ppm 86.4 ppm O 8.64 x107 ppm…
A: Given : Mass of calcium i.e solute = 40.5 mg And mass of pill i.e solvent = 3.50 g
Q: TRUE OR FALSE __________ 6. Glassware is clean when no water droplets cling to the inner wall of the…
A: For every chemist should know about the chemical laboratory safety guidelines and should understand…
Q: The property of liquids that explains the formation of water droplets on a polished surface is…
A: Given that, The property of liquids that explains the formation of water droplets on a polished…
Q: What type of Cosmetic Product is the below. Describe it in any manner and please identify the…
A: "Since there are multiple sub-parts in this question and it is not mentioned that which one has to…
Q: non-stick cooking utensils- are they safe for us
A: Tools and containers used for household chores mainly in the kitchen are known as utensils.…
Q: The Ability of a substance to exist in different crystalline form a. Lattice b. Polymorphism c.…
A: (1) There are different type of substances or things available in our surroundings. These have…
Q: ) What is the meaning of each the following :(choose four only) 1.Synthesis 2.Nanostructured…
A:
Q: ball & stick v- + labels
A: Given are the ball and stick structure. For IUPAC naming select the principle chain i.e longest…
Q: Which of the following substances should have the highest melting point? Group of answer choices CF4…
A: We know that ionic compounds have higher melting point than covalent compounds.
Q: If a small amount of impurity is present in a sample, what will be its effect on the melting point…
A: Types of impurities that can be present in the sample: Miscible impurity: Such impurity is soluble…
Q: What liquid is usually used and measured when calibrating glassware? a. Water with detergent O b.…
A: Answer What liquid is usually and measured when calibrating…
Q: A 551 ml container of 70% (v/v) Isopropanol (rubbing alcohol) contains how many mL of isopropanol?…
A: The volume of isopropanol is to be calculated
Q: Suppose the heat of neutralization had been determined using a glass beaker instead of a polystyrene…
A: Heat of neutralisation is the enthalpy change when 1 equivalent of an acid reacts with one…
Q: Which of the following statement is false? a. Component with the strong attraction to the…
A: The statement, which is false has to be identified.
Q: Alcohol can dry out your skin. What does this tell you about the physical properties of alcohol?…
A:
Q: 120- 90 60 30- Time (minutes) What is the melting point of this substance? Which letter represents…
A:
Q: 120- 90 60 30 Time (minutes) 90 What is the melting point of the following substances? Temperature…
A: The given plot is a phase transition curve of any sunstance which involve all the tree phases i.e,…
Q: Which liquid between Mineral oil, n-octanol and Dimethicone spreads the best and which one the…
A:
Q: A student has a mixture of two possible compounds. The student performs an extraction to separate…
A: The two compounds differ in melting points by more than 400C and the ramp rate here is 100C per…
Q: A student synthesizes an impure product of a compound with a melting point known to be 117 °C. Which…
A: As the synthesised product is impure product of the compound whose melting point is 1170C.
Q: Which of the following best indicates a pure sample when taking a melting point? Choose one answer…
A: Melting point Apparatus are used to determine the range of melting point of solid substances…
Q: heating a mixture to 100 degrees is necessary to seperate a mixture only containing salt and sand…
A: Yes given statement is true Without heating cannot be separate sand and salt
Q: How much water is present in 200 mL of 70% (v/v) isopropyl alcohol? 60 mL 140 mL 30 mL 70 mL
A: First option is correct✅ that is 60 ml
Q: . Explain the theory of emulsion.
A: Given emulsion We need to explain the theory of emulsion.
Q: To what volume should you dilute 45.00 ml of a 6.00 M nitric acid solution to produce a 2.25 M…
A: Given: Volume of initial solution is 45 mL. Molarity of initial solution is 6.00 M. Molarity of…
Q: Which of the following factors can result in the broadening of the melting point of a sample? I.…
A: We will do option elimination, Lets check statement 3. Usually on additing impurities there is…
Q: 9)Who measures melting points?
A: Melting point is defined as the temperature at which solid starts melting. At melting point there is…
Q: State a reason of the following statements: (i) Soap do not work in hard water. (ii) The use of the…
A: The interaction of surfaces of one system with another is studied under surface chemistry. The…
Q: cooking utensils
A: Dear student I have given answer to your question in the image format.
Q: Basing from the Deer Kill Case Study Illustrating the use of analytical chemistry to solve a problem…
A: ANALYTICAL CHEMISTRY The science of gathering, analysing, and disseminating knowledge about the…
Rank the following in terms of increasing melting point:
MgCI2__
NaCI__
AICI3__
Step by step
Solved in 2 steps
- What aspects of the structure of indigo contribute to a high melting point? Draw a resident structure of indigo to illustrate your explanation. Indigo H. NaOH H + 2 NO2 H. Indigo te: If you would like to dye something with your indigo, bring a small piece of cotton or ol fabric, such as a handkerchief or socks, to class. Yarn also works nicely, no nte nlease. The textile must fit loosely in the beaker that you're using as yourQ1/Why do we use oil instead of water to determine the melting point of chemicals? Q2/What is the reason for the variation in the measured melting point of the same chemical? Q3/What is the best type of oil used to measure the melting point of chemicals? Why?In Parts 1 and 2, you noticed some patterns about what kind of substances conduct electricity when dissolved in water, and also how melting points are related. Let's test this pattern by applying it to other substances. Consider the following substances: Potassium Chloride: KClKClKCl Octadecanol: C18H38OC_{18}H_{38}OC18H38O Dimethyl Sulfoxide: C2H6OSC_2H_6OSC2H6OS Lithium Bromide: LiBrLiBrLiBr Explain the reasoning that supports your answer.? Use the patterns you saw in the previous sections to predict whether the melting points for each substance will be high (above 400°C) or low (below 200°C).?
- Aspirin has a higher molar mass compared to salicylic acid, however aspirin melts at a lower temperature than salicylic acid. Provide a brief explanation for this observation. Table 1 Compound: Formula: Salicylic Acid C;H6O3 Aspirin C9H3O4 Molar Mass: 138.12 Melting point: Ka 158-160°C 1.08 x 10³ 180.15 140-142°C 2.72 x 10$ pKa Solubility (g/100ML) 2.99 4.57 0.18 0.25QUESTION#1: A chemist must dilute 74.6mL of 588.μM aqueous calcium sulfate (CaSO4) solution until the concentration falls to 333.μM. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in liters. Round your answer to 3 significant digits. QUESTION#2: What kind of intermolecular forces act between a hydrogen bromide molecule and a chloromethane (CH3Cl) molecule? Note: If there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force. PLEASE ANSWER BOTH!3. A student is trying to identify an unknown solid based on its melting point. She noted that the compound began to melt at 172°C and finished melting at 177°C. Knowing it is possible for there to be impurities in the sample, is this compound more likely to be camphor or hydroquinone. Explain your reasoning. 4. A young chemist has synthesized what he believed to be acetaminophen. He measured the melting point of this newly formed compound to be 163-178°C. If the literature value for the melting point of acetaminophen = 169-170.5°C, would the young chemist be wise to consume this product for headache relief? Why or why not?
- Directions Through the given situations below, answer the following questions 1 A mixture of monosodium glutamate, white sugar, salt and benzoic acid is to be melted by a group of Grade 7 students to determine the behavior of the mother during melting Predict how the mixture will look like as it is being heated. Explain your answer SUBSTANCE Sali White sugar Monosodium glutamate Benzoic acid MELTING POINT 801 C 186 C 232 C 122 C 2. Theo wants to observe what will happen to substance X (melting point is at 78 C) after heating it on an evaporating dish. After heating for a few minutes, substance X startsThis graph shows how the vapor pressure of three liquids varies with temperature: 900 - 800 - 700- 600 500 400. 300 ethylbenzene pyridine isobutyl alcohol 200 100- +++H HHH HHHH 140 100 110 120 130 temperature, °C Use the graph to answer the following questions: Which liquid is the most volatile? most volatile: choose one Which is the least volatile? least volatile: choose one ethylbenzene: What is the normal boiling point of each liquid? Note: your answer must be within 1°C of the exact answer to be graded correct. pyridine: isobutyl alcohol: Suppose a beaker of pyridine is put inside a sealed tank containing pyridine gas at 112. degree C and 692. torr. After ten minutes, will there be more liquid in the beaker, less liquid, or the same amount? O less the same vapor pressure, torrOrganic liquids are usually less dense than water. True False
- Explain (in one sentence) why Mg2+ has larger hydrated diameter compared to Ba2+.This graph shows how the vapor pressure of three liquids varies with temperature: 900- 800 700 600 500- 400 300 - benzaldehyde - cyclohexanone cyclohexanol 200 100 190 ttt t+++++ ++ 150 160 temperature, °C Use the graph to answer the following questions: Which liquid is the most volatile? most volatile: choose one Which is the least volatile? least volatile: choose one benzaldehyde: What is the normal boiling point of each liquid? Note: your answer must be within 1°C of the exact answer to be graded correct. cyclohexanone: cyclohexanol: Suppose a beaker of cyclohexanone is put inside a sealed tank containing cyclohexanone gas at 152. degree C and 698. torr. After ten minutes, will there be more liquid in the beaker, less liquid, or the same O more less O the same amount? vapor pressure, torrArrange the following in order of ease of liquifaction (easiest to liquify first):CF4CCl4CBr4CH4CI4
