Ethyl chloride is sold as a liquid (see photo) under pressurefor use as a local skin anesthetic. Ethyl chloride boils at 12 °Cat atmospheric pressure. When the liquid is sprayed ontothe skin, it boils off, cooling and numbing the skin as itvaporizes. (a) What changes of state are involved in this useof ethyl chloride?(b) What is the boiling point of ethyl chloridein degrees Fahrenheit? (c) The bottle shown contains103.5 mL of ethyl chloride. The density of ethyl chloride at25 °C is 0.765 g>cm3. What is the mass of ethyl chloride inthe bottle?

Q: a. One liquid has a temperature of 140°F and another liquid has a temperature of 60°C. Are the…

A: A measurement can be converted to two units by the conversion factor. The temperature in 0F can be…

Q: The density of a substance is greater in its solid state than in its liquid state? Explain how?

A: The mass of the substance divided by the volume of the substance is equal to the density of the…

Q: 250 grams of ice, initially at -15 C, is added to coke (240

A:

Q: Ethanol melts at -144°C and boils at 78°C at a constant pressure of 1atm. What state of matter must…

A: The boiling point of a substance is the temperature at which the vapor pressure of the liquid equals…

Q: The melting point is the temperature where a solid becomes liquid. The melting poi of acetone is…

A: State of matter below its melting point is solid and above its melting point is liquid.

Q: (a) Normally the human body can endure a temperatureof 105°F for only short periods of time without…

A: Given data part(a) : temperature  = 105 oF  part(b) : freezes point temperature =  −11.5°C part(c) :…

Q: Ethyl chloride is sold as a liquid (see photo) under pressurefor use as a local skin anesthetic.…

A: (a). At 120C, ethyl chloride turns into gaseous form from liquid form. Thus liquid state changes to…

Q: A professor has a beaker full of pure water. She heats the water to it's boiling point of 100°C.…

A: Colligative Properties: Which depends upon the number of the solute particles irrespective to the…

Q: How many joules of energy are needed to change 365.00 g of water from -65.0°C to liquid water at…

A:

Q: Convert the following to Kelvin:   71.7degrees F

A:

Q: Calculate the amount of heat needed to boil 80.0g of hexane (C6H14), beginning from a temperature of…

A:

Q: Calculate the amount of heat needed to melt 64.5 g of solid benzene (C,H,) and bring it to a…

A:

Q: uppose you have two slices of cheese. They have the same specific heat, but one is wice the mass of…

A: Given that specific heat is same for two chesse, one have double the mass of another  We have to…

Q: Ablock of coper of unknown mass has an nial temperalure of 0.0C The copper is immersed in a beaer…

A:

Q: How are q and ΔHrxn different from ΔH°rxn, (remember the definitions and unit)?

A: q is the amount of heat transferred to a system whereas  is used to describe the change in enthalpy.…

Q: Find the boiling point of tungsten in degrees Fahrenheit. (Tungsten, also known as wolfram, has the…

A: Tungsten is a transition metal with atomic number equals to 74. The chemical symbol used to donate…

Q: X Particulate Electrical Forces Unit Test - Profile 1- Microsoft Edge O…

A: Boiling point determined by the team was37.0±0.5°C and the accepted value is 37.4°C

Q: Aling Puring has a sari-sari store and one of her bestselling products is “yelo” or iced water in a…

A: Her observations are valid because refrigerator takes less time to form yelo during rainy seasons.

Q: A 251.3g sample of water at 5.3 Celsius is taking the freezing 0 Celsius how much energy was…

A: Given, Mass of Water = 251.3 gms = 0.2513 kg Change in Temperature = (0°C - 5.3°C) = (273 K - 278.5…

Q: A balloon is inflated to a volume of 1.7 liters at room temperature (26oC) and placed into a freezer…

A: Given: The initial volume, V1= 1.7 L The initial temperature, T1=26 + 273 =299 K    The Final…

Q: An automobile of 3000 kg travels toward north with a constant velocity of 70 km/h . All forces…

A: Force is given by: F=m×a where m is the mass and a is the acceleration.

Q: 1. Two pans of water are on different burners of a stove. One pan of water is boiling vigorously,…

A: The amount of energy required to convert some amount of liquid water to gas or steam at constant…

Q: Some groceries are placed in a deep freezer that is set at 18 oF. What is this temperature in…

A: Different units are used to express the volume and mass of substances such as grams, micrograms,…

Q: 1. In the following heating curve, which segment represents a freezing and melting?

A: Since we know that freezing point is the temperature where liquid state change to solid state  And…

Q: A 32.65-g sample of a solid is placed in a flask. Toluene, inwhich the solid is insoluble, is added…

A: We are asked to find the density of the solid: Where density = mass*volume

Q: How many joules of heat are lost b A 400 g of substance as it cools from 50.5 C to -10.5°C? The…

A:

Q: What is the boiling point of the automobile radiator fluid prepared by mixing 1.04  L of ethylene…

A: Given : Volume of ethylene glycol = 1.04 L = 1040 mL…

Q: 56.3 Cal to joules.

A:

Q: (Q35) Which of the following phenomena is associated with an increase in kinetic energy? O The…

A:

Q: What is the boiling point of the unknown substance Xin K(Kelvin)? X(t) = X(g) AH÷°(kJ mol1)S°J…

A:

Q: When lava and water are mbed, an explosion can easily occur. Of cource the lava and wacer are not…

A: Given data contains, The standard heat of reaction is 4000 J/g. The sensible heat could be…

Q: hite) + 3H2 +49.03kJ C6H6 cation:

A: Mass of carbon = 5.81 g Moles of Carbon = 5.81/12 = 0.484 mol □H = = 49.03 kJ

Q: The temperature of a sample of iron with a mass of 10.0 g changed from 25.0 degree C to 50.4 degree…

A: We can relate the heat change of a system to the product of the mass of the system, the specific…

Q: Calculate the amount of heat needed to boil 23.1g of octane (C8H18), beginning from a temperature of…

A: The amount of heat required to raise the temperature is calculated using the following equation:…

Q: The amount of heat needed to raise 50.0 grams of water from 20.0 degree Celsius to 30 degree Celsius…

A: Given : mass = 50 grams Temperature T2 = 30oC Temperature T1 = 20oC ∆T=T2-T1         = 30 - 20…

Q: How many joules are given off when 120 grams of water are cooled from 25˚C to -25˚C?

A: Determine heat released when temperature is reduced from 25oC to 0oC water:

Q: Q7. What is the amount of heat (kcal) when 50.0 g of steam hits the skin, condenses, and cools down…

A: Given: The mass of steam = 50.0 g We have to calculate the amount of heat in kCal when 50.0 g of…

Q: Calculate the heat change in kilocalories for freezing 265 g of water at 0 ∘C.

A: Heat change in freezing of a substance is equal and opposite of heat change in melting of the…

Q: The Magnitude of the unit is the same between ----- and ----- scales, They differ in the position of…

A: There are mainly 3 types of temperature scales commonly used. These are - The Celsius scale The…

Q: A 255 mL round-bottom flask is weighed and found to have a mass of 114.85 g. A few milliliters of an…

A: We know that, PV = nRT n = PV/RT    Given,  P = pressure = 1 atm  R = 0.0821 l.atm.mol-1.k-1 T =…

Q: A balloon is inflated to a volume of 5 liters at room temperature (28oC) and placed into a freezer…

A: According to ideal gas law, PV = nRT where P = pressure V = volume n = moles R = gas constant T =…

Q: 3. A student goes to the cafeteria to get an iced tea. He puts 3 ice cubes (approximately 20.0 mL…

A: Given: volume of tea = 375 mL volume of ice = 20.0 mL Initial temperature of ice = -15.0 oC Initial…

Q: The force that one object exerts on another object when they rub against each other in opposite…

A: The force that one object exerts on another object when they rub against each other in opposite…

Q: Calculate the amount of heat needed to boil 143. g of hexane (C,H14), beginning from a temperature…

A:

Q: om temperature, substance A is a solid and substance B is a gas. A and B rea llowing equation: A +…

A: Given : We have to predict the state of C.

Q: Box A and B are the same size and are connected by an open door. Box A is warmer at one instant in…

A: The given data : The size of both the boxes = same  They both are connected to open door The Box A…

Q: how many grams of ethylene glycol must you add to 10.00 liters of water in your car radiator to…

A: According to the equation for depression in freezing point,

Q: Which state of matter takes the shape of its container and is compressible?

A: There are three states of matter: solid: solid has a definite shape and having a definite volume,…

Q: A sample of water at 16.0 °C required an input of 1.97 × 104 J of heat to reach its boiling point,…

A: Heat absorbed, Q = 1.97 × 104 J Change in temperature = 100.0 °C - 16.0 °C = 84 °C Specific heat…

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.