n lab, you determine that the mass of a Florence flask and a piece of aluminum foil weigh 39.964 g. After performing the experiment on an unknown, you find that the flask, foil, and condensed vapors weigh 40.312 g. The flask was removed at 91.7oC when all the liquid was vaporized. At the end of the experiment you place the Florence flask and foil on the balance, fill the flask with water at 20.2∘ C, and find a mass of 163.638 g. If the current barometric pressure is 758 torr, what is the molar mass of your unknown?

Q: The metal osmium becomes superconducting at temperatures below 655.mK Calculate the temperature at…

A:

Q: Assume you have a 140 cm3 soil sample. The volume of the soil filled with water is 35 cm3 and the…

A: Porosity is a measure of void spaces in a material. It can be expressed as,…

Q: Complete the spaces in the sentences given below with the appropriate expressions. To obtain a…

A: In the laboratory often it is needed to attain low temperatures below 0oC. Such temperatures are…

Q: Why is it that the red liquid inside the thermometer moves up when a thermometer is heated? Select…

A: Since you have posted more than one question, we will solve only first question for you. If you want…

Q: How many joules of energy must be removed from 155 g of water at 28.1 °C to form ice at 0 °C?…

A: Given:  mass of water(m)= 155 g Initial temperature of water(T1)= 28.1C Final temperature of ice…

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: For all calculated answers, show all work, round to the proper number of significant figures and box…

A: 1. Moles of mercury vapor , n = PVRT = 350760atmx 6251000L0.0821 L.atm/mol.K  x (22 +273)K = 0.01188…

Q: lost when 12.3 g of ethanol, C2 H5 OH, cools from 50.0 °C to -42.0° C Express your answer using…

A:

Q: 16 Report Sheet Basic Laboratory Techniques 9. (a) Using the defined freezing and boiling points of…

A:

Q: A container of maple syrup is heated from 295 K to 315 K. What happens to the viscosity of the maple…

A: Given: A container of maple syrup is heated from 295 K to 315 K.

Q: There are two glass test tubes (a and b) filled with different substances. Sort each given statement…

A: Tube (a) shows strong adhesive forces, because the substance is bound to the test tube wall.Tube (a)…

Q: Find specific heat.

A: Since the heat lost by metal is used in rising the temperature of the water  and since heat is given…

Q: In lab, you determine that the mass of a Florence flask and a piece of aluminum foil weigh 39.821 g.…

A:

Q: The boiling points of five liquids have been measured 10 times each by a team of scientists, with…

A: Boiling point is the physical constant. Boiling point is the temperature when vapor pressure on the…

Q: Ty + 54 3.1 V. TA

A: Given Information- Boiling point of liquid werewolf blood= 32.0 oA Freezing point of liquid…

Q: 1. A candle is placed on one pan of a balance, and an equal weight is placed on the other pan. What…

A: Note - Since you have asked multiple questions, we are bound to solve only the first question for…

Q: Calculate the AH for evaporating 3.00 grams of water and AH for Condensing 20 grams of water.

A: Enthalpy of vaporization is the amount of energy that must be added to a liquid substance to…

Q: you determine that the mass of a Florence flask and a piece of aluminum foil weigh 39.964 g. After…

A: Given: mass of Florence flask and Al foil = 39.964 g mass of flask, foil, and condensed vapors  =…

Q: How much heat is absorbed by 68 g of ice when it melts? The heat of fusion of ice is 80. cal/g and…

A: 1) Mass of Ice is (m)=68 g 2) The heat of fusion of ice is (L)=80 cal/g

Q: Calculate the amount of heat needed to boil 122. g of hexane (C,H4), beginning from a temperature of…

A:

Q: To have the safest heating method, as a high school learner, the best choice is:  a. use alcohol…

A: The most safest method for heating has to be given.

Q: When a marble is dropped into a beaker of water, it sinks to the bottom. Which is the best…

A: When a marble is dropped into a beaker of water, it sinks to the bottom.  The best explanation for…

Q: Calculate the kilocalories needed to melt a 825 gg ice sculpture at 0 ∘C∘C and to warm the liquid to…

A: The amount of kilocalories needed to melt a 825 g ice sculpture is calculated as,

Q: A cylinder measuring 2.2 cm wide and 2.6 cm high is filled with gas and the piston pushed down with…

A:

Q: In lab, you determine that the mass of a Florence flask and a piece of aluminum foil weig 39.852 g.…

A:

Q: Golf balls are made up of rubber.What the properties of rubber to work properly.write an essay on…

A: Elastomer known as rubber is a linear polymer which possesses elasticity and good resistance to…

Q: -shaped tube containing an amount of mercury. The left arm of the tube has cross-sectional area A1…

A: Solution: Part(a) Given that Cross section of left arm A₁=10.9 cm² Cross section of right arm…

Q: In lab, you determine that the mass of a Florence flask and a piece of aluminum foil weigh 39.862 g.…

A: Given; florence flask + foil = 39.862 g florence flask + foil + water = 165.033 g mass of water =…

Q: How much heat is absorbed by 77 g of ice when it melts? The heat of fusion of ice is 80. cal/g and…

A: Given that heat of fusion = 80 cal/g mass of ice = 77g

Q: What glassware is best used when you need to measure the amount of liquid being delivered into…

A: What glassware is best used when you need to measure the amount of liquid being delivered into…

Q: Calculate the amount of heat needed to melt 119. g of solid benzene (C.H) and bring it to a…

A: The total amount of heat needed in this transition is the sum of heat needed in two different…

Q: A car weighting 10,000 N supported by a hydraulic car lift. The large piston supporting the car has…

A: In accordance with Pascal’s law, the pressure exerted by incompressible fluid in all direction is…

Q: Jervin tested how much water a paper towel could absorb in an experiment. He found out that a single…

A: The percentage error can be determined based on the ratio between the difference between the true…

Q: An ice bag containing 280 g of ice at 0 ∘C∘C was used to treat sore muscles. When the bag was…

A: When an ice is melted and convert into liquid, some amount of energy is absorbed. And this…

Q: Calculate the amount of heat needed to melt 173. g of solid benzene (C,H) and bring it to a…

A: Melting point of benzene is 5.5C.   Heat required to melt Benzene = n x ∆Hfus Where, ∆Hfus =…

Q: 3. A.) Aldrich chemical company reports the melting point of a substance to be 82.0 "C. When you…

A: Melting point is the temperature at which solid form of the liquid starts converting into the liquid…

Q: Calculate the amount of heat needed to boil 11.8 g of hexane (CH4), beginning from a temperature of…

A: We have to calculate the amount of heat needed to boil 11.8 gm of hexane beginning from a…

Q: A sample will require a third heating period if none of these are the criteria used the sample still…

A: In the gravimetry analysis ,we heat the compound and determine the mass of the compound every…

Q: a 24 kg object has a weight force of 294 newton’s on planet-x. what is the gravitational…

A: The weight of a body (W) is expressed as W = mg where m is the mass of the body and g is the…

Q: 19. The kinetic molecular theory assumes that particles are not attracted to each other. Which…

A: KTG theory( Kinetic theory of gases) The gas particles have no forces of attraction. The gas…

Q: IV. MARBLE RACE 1) In the same size of drinking glasses/plastic cups, pour equal amounts of water,…

A: In the same size of drinking glass/cup,equal amount of water,milk,vinegar, cooking oil,diswashing…

Q: 9. The temperature is a critical variable that needs to be recorded when calibrating glassware.…

A:

Q: If 2400 J of heat melts a piece of solid mercury, what is the mass of the mercury

A: The heat required to melt a substance is calculated as: Q =m.Lf where Q is the heat required to melt…

Q: While heating two different samples of water at sea level, one boils at 102°C and one boils at…

A: The normal boiling point of water is 100 oC, so this can be taken as true value or accepted…

Q: Calculate the amount of heat needed to melt 173. g of solid hexane (C,H,4) and bring it to a…

A:

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: Calculate the amount of heat needed to melt 173. g of solid benzene (C,H) and bring it to a…

A: We know according to Hess law, the amount of heat change in a single step or in multiple step are…

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: °C and The melting point of a solid is 39.0 °F. Convert it to

A:

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

A: 1. Graduated cylinder is best used for measuring large volumes.

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.