How is the mass of 1 mole of an element determined?

How is the mass of 1 mole of an element determined?
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It is the same as the element’s Atomic Mass, but in grams.
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Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole. (A) 0 (B) 273 (C) 25 (D) None of these

Description : Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole. (A) 0 (B) 273 (C) 25 (D) None of these

Last Answer : (A) 0

Find the mass of 1.5 mole of CO2 molecule. -Chemistry 9th

Description : Find the mass of 1.5 mole of CO2 molecule. -Chemistry 9th

Last Answer : Let: n be the number of moles m be the mass M be the molecular weight n=1.5mol By definition: n=mM m=n⋅M M(C)=12g/mol M(O2)=2⋅16g/mol=32g/mol M=12g/mol+32g/mol M=44g/mol m=1.5mol⋅44g/mol m=66g

Find the mass of 1.5 mole of CO2 molecule -Chemistry 9th

Description : Find the mass of 1.5 mole of CO2 molecule -Chemistry 9th

Last Answer : Hi! Here is the answer to your question: To find the mass of 1.5 moles of CO2, you need to find first its molar mass. Atomic mass of C = 12 g/mol Atomic mass of O = 16 for O2 = (16 x 2) = 32g/mol ... number of moles x molar mass = 1.5 mol x 44 g/mol mass = 66 g Hope this Helps ! hope this helps u

What is the mass of 1/2 mole oxygen atom ?

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Last Answer : Mole Oxygen Atomic Mass = 18 grams So , 1/2 Mole Oxygen Atomic Mass = 6 grams

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Description : What is the molecular formula of a compound with an empirical formula of C2OH4 and a molar mass of 88 grams per mole?

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What is the mass in grams of one mole of helium atoms?

Description : What is the mass in grams of one mole of helium atoms?

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Description : What is the mass in grams of one-mole of potassium atoms?

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Atomic mass of Sulphur is 32u. The number of moles in 16 games of Sulphur is: (1) 1 mole of Sulphur (2) 0.5 moles of Sulphur (3) 0.75 moles of Sulphur (4) 0.25 moles of Sulphur

Description : Atomic mass of Sulphur is 32u. The number of moles in 16 games of Sulphur is: (1) 1 mole of Sulphur (2) 0.5 moles of Sulphur (3) 0.75 moles of Sulphur (4) 0.25 moles of Sulphur

Last Answer : (2) 0.5 moles of Sulphur Explanation: The molar mass of a com pound is equal to the sum of the atomic masses of its con stituent atoms in g/mol.

The operating line for an absorber is curved, when plotted in terms of (A) Mole fractions (B) Mole ratios (C) Partial pressure (D) Mass fractions

Description : The operating line for an absorber is curved, when plotted in terms of (A) Mole fractions (B) Mole ratios (C) Partial pressure (D) Mass fractions

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Description : Which of the following is not a unit of mass transfer co-efficient? (A) Moles transferred/ [(time) (area) (mole fraction)] (B) Moles transferred/ [(time) (area) (mass A/mass B)] (C) Moles transferred/ [(time) (area) (pressure)] (D) None of these

Last Answer : (D) None of these

The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp= M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force.) (A) Kc = Kp = Km (B) Kc = Kp /RT = Km . RT/P (C) Kc = Kp . RT = Km . RT/p (D) None of these

Description : The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving ... (C) Kc = Kp . RT = Km . RT/p (D) None of these

Last Answer : (C) Kc = Kp . RT = Km . RT/p

H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is (A) 2.0 (B) 1.56 (C) 1.0

Description : H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S ... by, y = 5x + 0.001 is (A) 2.0 (B) 1.56 (C) 1.0

Last Answer : (A) 2.0

A cylinder contains oxygen at a pressure of 10 atm and a temperature of 300 K. The volume of the cylinder is 10 liters. What is the mass of the oxygen in grams? Molecular weight (MW) of oxygen is 32 g/mole?  a. 125.02  b. 130.08  c. 135.05  d. 120.04

Description : A cylinder contains oxygen at a pressure of 10 atm and a temperature of 300 K. The volume of the cylinder is 10 liters. What is the mass of the oxygen in grams? Molecular weight (MW) of oxygen is 32 g/mole?  a. 125.02  b. 130.08  c. 135.05  d. 120.04

Last Answer : 130.08 {(10atm)(10)(32)/(0.0821) (300K)}

Is the amount of a substance that contains Avogadro’s number of atoms/molecules.  a. mass  b. matter  c. gram-mole  d. volume

Description : Is the amount of a substance that contains Avogadro’s number of atoms/molecules.  a. mass  b. matter  c. gram-mole  d. volume

Last Answer : gram-mole

The mass of one mole of a substance in grams is known as ______.  A. Molar weight  B. Molar mass  C. Molar volume  D. Molar constant

Description : The mass of one mole of a substance in grams is known as ______.  A. Molar weight  B. Molar mass  C. Molar volume  D. Molar constant

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Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure  (a) enthalpy  (b) volume  (c) mass  (d) entropy  (e) specific volume.

Description : Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure  (a) enthalpy  (b) volume  (c) mass  (d) entropy  (e) specific volume.

Last Answer : Answer : b

Sulphur forms the chlorides S2Cl2 and SCl2. The equivalent mass of sulphur in SCl2 is [EAMCET 1985] (A) 8 g/mole (B) 16 g/mole (C) 64.8 g/mole (D) 32 g/mole

Description : Sulphur forms the chlorides S2Cl2 and SCl2. The equivalent mass of sulphur in SCl2 is [EAMCET 1985] (A) 8 g/mole (B) 16 g/mole (C) 64.8 g/mole (D) 32 g/mole

Last Answer : (D) 32 g/mole

How is the period to which an element belongs determined?

Description : How is the period to which an element belongs determined?

Last Answer : If we know the atomic number and electronic configuration of an element, we can find the period to which it belongs by finding the number of shells. Total number of shells indicates period number. 2 2 6 2 ... 3s 6 2 3p , 4s . Highest shell number is 4 so calcium belongs to the 4 th period.

How is the block to which an element belongs determined?

Description : How is the block to which an element belongs determined?

Last Answer : If we know the atomic number and electronic configuration of an element, we can find the block to which they belong. If the outermost sub energy level is s' then it belongs to s block'. If the ... , 3s 1 . The orbital occupied by the outermost electron is s. So sodium belongs to s' block.

Vane anemometer (A) Is an area meter (B) Is a variable head meter (C) Rotates an element at a speed determined by the velocity of the fluid inwhich the meter is immersed(D) None of these

Description : Vane anemometer (A) Is an area meter (B) Is a variable head meter (C) Rotates an element at a speed determined by the velocity of the fluid inwhich the meter is immersed (D) None of these

Last Answer : (C) Rotates an element at a speed determined by the velocity of the fluid inwhich the meter is immersed

The density of the material in the shape of a cube is determined by measuring three sides of the cube and its mass. 1f the relative errors

Description : The density of the material in the shape of a cube is determined by measuring three sides of the cube and its mass. 1f the relative errors

Last Answer : The density of the material in the shape of a cube is determined by measuring three sides of the cube and its mass. 1f ... B) 6% (C) 2.5° (D) 3.5%

How is atomic mass number determined?

Description : How is atomic mass number determined?

Last Answer : By adding number of protons and neutrons

Purity of a metal can be determined with the help of – (1) Pascal's law (2) Boyle's law (3) Archimedes principle (4) Conservation of mass principle

Description : Purity of a metal can be determined with the help of – (1) Pascal's law (2) Boyle's law (3) Archimedes principle (4) Conservation of mass principle

Last Answer : (3) Archimedes principle Explanation: Purity of a metal can be determined with the help of Archimedes Principle which makes use of the densities and buoyancy of metals. Finding the density of a metal ... help to determine its purity. It is most commonly used in the checking the purity of gold.

A certain fluid is flowing in a 0.5m x 0.3 channel at the rate of 3 m/s and has a specific volume of 0.012 m³/kg. Determined the mass of water flowing in kg/s.  a. 267 kg/s  b. 378 kg/s  c. 375 kg/s  d. 456.5 kg/s m = Aν/V

Description : A certain fluid is flowing in a 0.5m x 0.3 channel at the rate of 3 m/s and has a specific volume of 0.012 m³/kg. Determined the mass of water flowing in kg/s.  a. 267 kg/s  b. 378 kg/s  c. 375 kg/s  d. 456.5 kg/s m = Aν/V

Last Answer : 375 kg/s

Purity of a metal can be determined with the help of (1) Pascal’s law (2) Boyle’s law (3) Archimedes principle (4) Conservation of mass principle

Description : Purity of a metal can be determined with the help of (1) Pascal’s law (2) Boyle’s law (3) Archimedes principle (4) Conservation of mass principle

Last Answer : Archimedes principle