A pycnometer is a glass flask with a tight fitting glass stopper that can be used...
A pycnometer is a glass flask with a tight fitting glass stopper that can be used to determine the density of an insoluble solid by measuring the volume of water ejected out of the pyconometer when sample of the solid is placed in it. Determine the density of an unknown alloy sample from the following measurements.
Assume the density of water is 1.000 g/cm3.
Mass of clean pycnometer = 25.151 g
Mass of clean pycnometer plus water = 42.481 g
Mass of clean pycnometer plus metal sample = 39.105 g
Mass of clean pycnometer plus metal plus water = 54.265 g (after ejected water is dried from the outside surface)
Homework Answers
Add Answer to:
A pycnometer is a glass flask with a tight fitting glass stopper
that can be used...
Having obtained the volume of a flask (25.001 mL), the student then emptied the flask and...
Having obtained the volume of a flask (25.001 mL), the student then emptied the flask and dried it. The mass of the empty stoppered flask was 25.710 g. To the empty flask they added pieces of a metal until the flask was about three-fourths full. The student weighed the stoppered flask and its metal contents and found that the mass was 162.071 g. They then filled the flask with water, stoppered it, and obtained a total mass of 167.932 g...
-A sample of kerosene weighs 36.4 g. Its volume was measured to be 45.6 mL. What...
-A sample of kerosene weighs 36.4 g. Its volume was measured to be 45.6 mL. What is the density of kerosene? -Acetone, the solvent in some nail polish removers, has a density of 0.791 g/mL. What is the volume of 16.4 g of acetone? -A graduated cylinder was filled with water to the 19.1 mL mark and weighed on a balance. Its mass was 34.16 g. An object made of silver was placed in the cylinder and completely submerged in...
Two methods were descibed for determining the volume of the flask used for the molar mass...
Two methods were descibed for determining the volume of the
flask used for the molar mass determination. Which method will give
a more precise determination of the volume? Why?
When two acceptable determinations of the weight of vapor needed to fill the flask have been obtained, remove the foil cover from the flask (do not discard) and clean out the flask. Fill the flask to the very rim with tap water, cover with the foil cover, and weigh the flask,...
Hi, Can anyone make sure Questions 4,5,6, and 7 are correct? Also, if there is a...
Hi,
Can anyone make sure Questions 4,5,6, and 7 are correct?
Also, if there is a mistake, then write down the answers
please
1. If 0.765g of an unknown gas is collected at 741 torr (corrected) and 95°C in a 245 ml container, calculate the molecular weight of this unknown gas? P=741 tona PV=ART -> ideal gas equation n=PU T=95C+243=368K BT mass of the gas = 0.7659 =a41tów 80.245€ R= 62-4L-fowl mol- 624kbar V=245 med 'x 36644 Moler mass of...
Can, anyone make sure these answers are correct? 1. If 0.765g of an unknown gas is...
Can, anyone make sure these answers are correct?
1. If 0.765g of an unknown gas is collected at 741 torr (corrected) and 95°C in a 245 ml container, calculate the molecular weight of this unknown gas? P=741 tona PV=ART -> ideal gas equation n=PU T=95C+243=368K BT mass of the gas = 0.7659 =a41tów 80.245€ R= 62-4L-fowl mol- 624kbar V=245 med 'x 36644 Moler mass of the gos= 0.7659 245L 6 +91-1 60079rmal 2. If in the experiment in Question 1,...
question one question two Aspirin lab (10 points) 5. a) Spectroscopy is being used to determine...
question one
question two
Aspirin lab (10 points) 5. a) Spectroscopy is being used to determine the concentration of aspirin in an unknown sample. The absorbance spectrum of the highest concentration standard [Fe3+, SA) prepared is given below. What wavelength should be used to create the calibration curve for the experiment? Explain your reasoning. 0.14 Absorbance 0.02 250 300 450 500 350 400 Wavelength (nm) Wavelength Explain your reason briefly. b) In this experiment an aspirin tablet was placed in...
What are the desirable characteristics of a solvent to be used in the recrystallisation of a...
What are the desirable characteristics of a solvent to be used
in the recrystallisation of a solid product? (Hint: what is the
underlying purpose of doing recrystallisation, aside from making
the product look attractive?)
EXPERIMENT5 PREPARATION OF BENZOIC ACID Oxidation of a Primary Alcohol In this experiment, a primary alcohol (benzyl alcohol) is oxidised to a carboxylic acid (benzoic acid) by a strong oxidising agent (potassium permanganate) Because the synthesis reaction is carried out in basic conditions, the carboxylic acid...
please find all the missing blanks. Data and Calculations: Heat Effects and Calorimetry A. Specific Heat Trial 1 Ma...
please find all the missing blanks.
Data and Calculations: Heat Effects and Calorimetry A. Specific Heat Trial 1 Mass of stoppered test tube plus metal Mass of test tube and stopper 34.564 25.7348 9.150 Trial 2 34.5648 25.7346 एयर 9. ISO 49.6928 Mass of calorimeter Mass of calorimeter and water 48.940 Mass of water Mass of metal 23.6 23.6 Initial temperature of water in calorimeter °C c Initial temperature of metal (assume 100°C unless directed to do otherwise) 101.8 °C...
2. In attempting to calculate the density of chloroform, CHCl3, Riley determines the following densities: 1.30...
2. In attempting to calculate the density of chloroform, CHCl3, Riley determines the following densities: 1.30 g/mL, 1.35 g/mL, 1.32 g/mL, 1.23 g/mL, 1.13 g/mL, and 1.39 g/mL. a. Calculate the average density of chloroform from his data. b. If the accepted density of chloroform is 1.48 g/mL, calculate the percent error. C. Was Riley's data accurate? Was the data precise? Explain your reasoning. Experiment 1: Determination of the Density of Water and nft page 14 3. For each of...
Acid/Base Extraction Liquid-liquid extraction is a technique that can be used to physically separate two substancesthat...
Acid/Base Extraction Liquid-liquid extraction is a technique that can be used to physically separate two substancesthat have varying solubility properties. Typically an aqueous solution can be extracted with anorganic solvent to isolate a compound or vice-versa. The specialized piece of glassware that isemployed for these types of separations is called a separatory funnel.In this experiment a mixture of benzoic acid and naphthalene will be purified using liquid-liquidextraction, more specifically an acid-base extraction. Since both compounds are soluble inethyl acetate (an...
Having obtained the volume of a flask (25.001 mL), the student then emptied the flask and dried it. The mass of the empty stoppered flask was 25.710 g. To the empty flask they added pieces of a metal until the flask was about three-fourths full. The student weighed the stoppered flask and its metal contents and found that the mass was 162.071 g. They then filled the flask with water, stoppered it, and obtained a total mass of 167.932 g...
Two methods were descibed for determining the volume of the
flask used for the molar mass determination. Which method will give
a more precise determination of the volume? Why?
When two acceptable determinations of the weight of vapor needed to fill the flask have been obtained, remove the foil cover from the flask (do not discard) and clean out the flask. Fill the flask to the very rim with tap water, cover with the foil cover, and weigh the flask,...
Hi,
Can anyone make sure Questions 4,5,6, and 7 are correct?
Also, if there is a mistake, then write down the answers
please
1. If 0.765g of an unknown gas is collected at 741 torr (corrected) and 95°C in a 245 ml container, calculate the molecular weight of this unknown gas? P=741 tona PV=ART -> ideal gas equation n=PU T=95C+243=368K BT mass of the gas = 0.7659 =a41tów 80.245€ R= 62-4L-fowl mol- 624kbar V=245 med 'x 36644 Moler mass of...
Can, anyone make sure these answers are correct?
1. If 0.765g of an unknown gas is collected at 741 torr (corrected) and 95°C in a 245 ml container, calculate the molecular weight of this unknown gas? P=741 tona PV=ART -> ideal gas equation n=PU T=95C+243=368K BT mass of the gas = 0.7659 =a41tów 80.245€ R= 62-4L-fowl mol- 624kbar V=245 med 'x 36644 Moler mass of the gos= 0.7659 245L 6 +91-1 60079rmal 2. If in the experiment in Question 1,...
question one
question two
Aspirin lab (10 points) 5. a) Spectroscopy is being used to determine the concentration of aspirin in an unknown sample. The absorbance spectrum of the highest concentration standard [Fe3+, SA) prepared is given below. What wavelength should be used to create the calibration curve for the experiment? Explain your reasoning. 0.14 Absorbance 0.02 250 300 450 500 350 400 Wavelength (nm) Wavelength Explain your reason briefly. b) In this experiment an aspirin tablet was placed in...
What are the desirable characteristics of a solvent to be used
in the recrystallisation of a solid product? (Hint: what is the
underlying purpose of doing recrystallisation, aside from making
the product look attractive?)
EXPERIMENT5 PREPARATION OF BENZOIC ACID Oxidation of a Primary Alcohol In this experiment, a primary alcohol (benzyl alcohol) is oxidised to a carboxylic acid (benzoic acid) by a strong oxidising agent (potassium permanganate) Because the synthesis reaction is carried out in basic conditions, the carboxylic acid...
please find all the missing blanks.
Data and Calculations: Heat Effects and Calorimetry A. Specific Heat Trial 1 Mass of stoppered test tube plus metal Mass of test tube and stopper 34.564 25.7348 9.150 Trial 2 34.5648 25.7346 एयर 9. ISO 49.6928 Mass of calorimeter Mass of calorimeter and water 48.940 Mass of water Mass of metal 23.6 23.6 Initial temperature of water in calorimeter °C c Initial temperature of metal (assume 100°C unless directed to do otherwise) 101.8 °C...
2. In attempting to calculate the density of chloroform, CHCl3, Riley determines the following densities: 1.30 g/mL, 1.35 g/mL, 1.32 g/mL, 1.23 g/mL, 1.13 g/mL, and 1.39 g/mL. a. Calculate the average density of chloroform from his data. b. If the accepted density of chloroform is 1.48 g/mL, calculate the percent error. C. Was Riley's data accurate? Was the data precise? Explain your reasoning. Experiment 1: Determination of the Density of Water and nft page 14 3. For each of...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago