A student synthesizes a pure compound whose melting point is known to be 138 degrees Celsius. Which of the following could be their measured melting point?     118-123 degrees Celsius     137-138 degrees Celsius     113-114 degrees Celsius     142 degrees Celsius     148-153 degrees Celsius

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: The state of a substance when the pressure and temperature are above the critical temperature and…

A: Critical temperature is the temperature above which a gas can't be liquify by applying pressure.  At…

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Q: What is the name for the following phase change? CO2(s) → CO2(g) a. vaporization b. freezing c.…

A: In this CO2 is initially in solid state.It is converting to CO2 gas.

Q: The graph below represents the heating curve of a substance that starts as a solid below its…

A: Melting point of substance is the temperature at which solid converts into the liquid state.

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A: Given: At atmospheric pressure its melting point is 75°C and its boiling point is 157°C Its triple…

Q: 2.2 Which substance(s) is/are liquid(s) at 400 C? 2.3 Which substance does not have a liquid phase?…

A: (2.1)Elemental hydrogen (H, element 1), nitrogen (N, element 7), oxygen (O, element 8), fluorine (F,…

Q: Two different pure solids are melted, and one exhibits a melting point of 138 oC, while the other…

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A:

Q: V. Choose which term among the following refers to each statement in numbers 1 to 4. A. surface…

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Q: Determine the relationship between the melting point of an impure substance to that of a pure…

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Q: When a solid forms from a liquid of the same nature, we call it: A) melting B) fusion C) dissolution…

A: When a liquid loose its energy or energy is released then it will convert into solid.

Q: Qs2. You are given two similar looking white, organic crystalline solids and determine their melting…

A: Given information:The two organic compounds are similar in nature and melting points of first and…

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A: The following graph represents the variation of vapor pressure of three liquids at different…

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Q: Stationary phase can be   solid or liquid    gas or liquid   only solid   only liquid

A: Answer- a) The stationary phase can be solid or liquid supported on a solid. In chromatography,…

Q: Melting point can be defined as the temperature when a solid becomes a liquid. The melting point of…

A: All matter can be classified as solid, liquid and gases mainly. In these physical states of matter,…

Q: 4.What is the name of a phase change between a solid to a liquid?  a freezing  b evaporation  c…

A: melting  Option "d" is correct.

Q: An unknown substance boils at 352.78 Fahrenheit. Calculate the boiling point of this substance in…

A: The relationship between Celsius (C) scale and Fahrenheit (F) scale is: F=95C+32······(1)

Q: A student synthesizes a pure compound whose melting point is known to be 150 degrees Celsius. Which…

A: Melting point is the temperature at which the solid and liquid forms of a pure substance can exist…

Q: Directions. Graph the heating curve of ethanol using the information given. Background Information…

A: Matter: It is made up of many particles or atoms. 3 different states of matter are solid, liquid and…

Q: O triple point O melting point boiling point

A: when the temperature increases then the kinetic energy of the particle increases and when the…

Q: You have 10.3 g of a colorless liquid. Adding 155.1 J of heat increases the temperature of the…

A: Given that: Mass of liquid(m) = 10.3g  Heat(q) = 155.1J T1 = 25.0°C T2 = 28.6°C Change in…

Q: The graph below represents the heating curve of a substance that starts as a solid below its…

A:

Q: The graph below represents the heating curve of a substance that starts as a solid below its…

A:

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Q: 140 120 100 80 60 40 20 26 40 80 100 120 Time (min) Answer the following questions for the heating…

A: Letter a represents solid phase. Letter b represents solid <==> liquid equilibrium at 0°C.…

Q: Acetic acid, has a melting point of 16.7 degress celcius and a boiling point of 118 degrees celcius.…

A: Acetic acid is also known as ethanoic acid.  It gives sour taste and pungent smell to vinegar,…

Q: A student synthesizes an impure compound whose melting point is known to be 143 degrees Celsius.…

A: Melting point of a substance is considered at that temperature at which a solid melts.

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Q: A student has a mixture of two possible compounds. The student performs an extraction to separate…

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Q: Condensation occurs when liquid phase of a substance is converted to its gaseous phase…

A: Condensation is associated with release in thermal energy and so it's an exothermic process.

Q: Formaldehyde is a disinfectant, a preservative, and a raw material for plastics manufacture. Its…

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Q: 11.What is the laboratory equipment that is best suited to accurately measure large volume of…

A: Note: According to our guidelines we are supposed to answer only one question. Kindly repost other…

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.

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Q: A new linear temperature scale, degrees Zunzol (Z), is based on the freezing point and boiling point…

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Q: Many common liquids have boiling points that are less than 110C , whereas most metals are solids at…

A: The question is based on the concept of unit conversions. we have to convert the temperature in…

Q: This graph shows how the vapor pressure of three liquids varies with temperature: 900- 800 700 600…

A: For 1: We know that, The liquid is most volatile if the vapor pressure of the gas is maximum and the…

Q: 31. Rank the following compounds in order of increasing melting point, putting the compound with the…

A: 31. Melting point of a compound depends on the inter-molecular force. Greater is the inter-molecular…

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A: Given: The spacing between molecules in crystal=12.85 nm Total number of molecules =105   Total…

Q: Water in a well boils at 75°C at a certain depth in water. At what temperature in °C the water will…

A: We know that, Enthalpy of vaporisation of water = 40.5 kJ/mol Water boils at 75°C ( at some pressure…

Q: • B A• T. Starting at Cwe increased the pressure at constant temperature. condensation Starting at B…

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Q: Liquid nitrogen has a boiling point of -195.81 ° C at atmospheric pressure. Express this temperature…

A: Since we know that 0 ℃  = 273.15 K  So to convert ℃ into K we will add 273.15 to ℃

Q: The changing of a liquid to a solid Select one: Melting Condensation Freezing Deposition

A: The question is based on the concept of physical process. physical process are generally reversible…