A mass of 18.6 g of an element is known to contain 4.84 x 1023 atoms. What is the atomic mass of the element?

Q: What is distinctive about isotopes of elements, and why are they important?

A: The atomic number of an element is expressed as the number of protons and it is equal to the number…

Q: how many helium atoms are there in a helium blimp containing 536 kg of helium?

A: moles and number of atoms are related to each other by Avogadro's numberSo, one mole of every…

Q: Which describes an atom of plutonium?A. It can be divided into smaller particles that retainall the…

A: A. It can be divided into smaller particles that retainall the properties of plutonium.B. It cannot…

Q: If an atom of fluorine (F) has an atomic mass of 18.998, how many neutrons are in the nucleus? 9. O…

A: Applying formula A= Z+n

Q: The mass of a "F atom is 18.998 u. What is its mass relative to the mass of an atom of "C? 19F 12C

A: Answer: Mass of one Fluorine atom=18.998u Mass of one Carbon-12 atom=12.0107u Ratio of their masses…

Q: What are isotopes and how are they related to the atomic weight?

A: Isotopes are the compounds with same atomic number but different mass number. They have same number…

Q: Consider the following equation: The mass number of element X is: 218A+ 15B 100C + xlx +4n

A: Recall the given reaction         218A + 15B →100C + XX + 4 1n In the nuclear reaction summation of…

Q: For two isotopes Unk-45 and Unk-47 with relative abundance’s of 12.3% and 87.7%, respectively, which…

A:

Q: What is the mass of 5.10*10^21 platinum atoms?

A: A mole represents 6.022x1023 particlesThe 6.022x1023 Number is also known as Avogdro's Number .It…

Q: Differentiate between different isotopes of an element?

A: A number of atoms of some elements have been identified, which have the same atomic number but…

Q: How many grams of copper that consists of 1.54 x 1024 atoms of copper?

A: To convert atoms to grams,  Step I  -  Convert atoms to moles                  1 mol  = 6.022 × 1023…

Q: If the atomic mass of an element is X, what is the mass in grams of 1.027 x 1020 atoms of the…

A: Atomic mass of element (given)=X Number of atoms present =1.027×1020 atom

Q: Suppose we redefined the atomic mass scale by arbitrarily assigning to the naturally occurring…

A: The atomic mass of a single atom is simply its total mass of the protons, neutrons, and electrons in…

Q: What is the mass of 4.97×1021 platinum atoms?

A: Mass has many units. Its SI unit is Kg. On atomic level, atomic mass unit, molar mass, molecular…

Q: What is the atomic number for an element whose mass number is 115, which contains 65 neutrons per…

A: Welcome to bartleby ! We have to tell atomic number

Q: How many grams would 4.15 x 1021 atoms of Pb weigh?

A: Answer

Q: What is the mass number of an atom that contains a. 42 protons, 42 electrons, and 53 neutrons? b. 24…

A: a. 42 protons, 42 electrons, and 53 neutrons? b. 24 protons, 24 electrons, and 28 neutrons? To find…

Q: How are the isotopes of an element different from one another?

A: Isotopes are atoms of the same element which are different in mass. That means They have the same…

Q: What is the difference between the atomic mass and the atomic weight?

A:

Q: What is the mass of 1.6x10^21 argon atoms?

A: Molar mass of Argon is 39.95 g/mol i.e 1 mole of argon = 39.95 g of Argon Number of atoms of Argon…

Q: Which element accounts for roughly 75% of the observed mass of the universe? Which four elements…

A: Hydrogen is the most abundant element in the universe which aaccounts for roughly 75% of the…

Q: The mass number of an element is equal toa. the mass of its atom’s protons and neutrons.b. the mass…

A: An atom consists of three sub-atomic particles named electron, proton and neutron. The mass of an…

Q: What particles are found in the nucleus of an atom? What is the charge of the nucleus?

A: Sub-atomic particles are the particles that are present inside the atom. Three sub-atomic particles…

Q: What is the atomic number of an element whose mass number is 78, which contain 50 neutrons per atom?

A: The atomic number of an element represents the total number of protons present in the nucleus of the…

Q: What does the nucleus of an atom consists of?

A: In an atom, three fundamental particles are present, proton, electron, and neutron.

Q: One isotope has a mass of 62.9296 amu (69.17% abundance). The other isotope has a mass of 64.9278…

A:

Q: What is atomic mass? How is it calculated?

A: Atoms are the smallest constituents of a chemical compound and the atoms do not have independent…

Q: What is the difference between atomic number and atomic weight?

A: The atomic number corresponds to the number of protons present in an atom. It is represented by Z.…

Q: How many grams of sulfur are there in 2.01 atoms of sulfur?

A:

Q: 5- Atoms of the same element with different mass numbers are called..

A:

Q: Consider the following equation: The mass number of element X is: 219A+12B 93C+ belx +2'n

A:

Q: If a sample of gallium contains 1.56×104 atoms of gallium-69 and 1.02×104 atoms of gallium-71, what…

A: Given,1.56×104 atoms of gallium 69.1.02×104 atoms of gallium 71.

Q: How many grams of Xe are there in a sample of Xe that contains 8.97×1023 atoms?

A: First we have to determine the moles of xenon.

Q: If 4.20 x 1020 atoms of an element have a mass of 55.2 mg, what is the atomic weight of the element?

A: • 1 mole = 6.023 x 1023 molecules/atoms.• 1 mole = molar mass.• No. of mole = No. of atoms6.023 x…

Q: Estimate the percentage of the total mass of a atom that is due to (a) electrons, (b) protons, and…

A: Dear student, you have not mentioned the atom for which the mentioned percentage is required. I am…

Q: what is the mass of 7.15 x 10^22 aluminum atoms?

A: Given, Number of Aluminium atoms = 7.15×1022

Q: For an isotope that has 82 protons and 124 neutrons. What is the mass number (A) and what is the…

A: Given :- number of protons = 82               number of neutrons = 124  To be calculated :-  Mass…

Q: What is the mass of 4.91x10^21 platinum atoms?

A: Given: Number of platinum atoms= 4.91×1021 we know that Molar mass of platinum=195.084 g/mol

Q: Explain how the isotopes of an element are alike and how they are different.

A: An atom is composed of protons, electrons, and neutrons. The protons and neutrons are present in the…

Q: What is the mass, in grams, of one argon atom ? 6.64x10^23g

A: The mass of one atom can be calculated by dividing molar mass by avagadro number.

Q: What element has a mass number of 9 and has five neutrons in its nucleus?

A:

Q: Calculate the mass of 1.23×10241.23×1024 helium atoms.

A: 1 mole of a substance contains Avogadro number of atoms.

Q: What would be the approximate mass of a particle that has 48 electrons, 46 neutrons and 52 protons?

A: No of electrons = 48 No of neutrons = 46 No of protons = 52

Q: Bronze medals are made from an alloy composed of 93.8% copper, 5.1% tin, and 1.1% zinc (measured by…

A: Given : Mass % of copper = 93.8 % mass % of tin = 5.1 %  and mass % of Zinc = 1.1 % Assuming 100 g…

Q: What is the difference between mass number and atomic number?

A: Atomic number:The atomic number of the element is the number of protons present in that element.Mass…

Q: What two particles are used to determine the mass number of an atom?

A: Given a three points  1-           proton 2-          neutron 2-          electron Determined the…

Q: What particles comprise the charge of the nucleus?

A: To find : What particles comprise the charge of the nucleus.

Q: (a) Define atomic number and mass number. (b) Which of these can vary without changing the identity…

A: a)Atomic number (Z) is defined as the number of protons present in the atom.Mass number is defined…

Q: What is the mass of 4.91×1021 platinum atoms?

A: Given:Number of platinum atoms = 4.91×1021.Molar mass of platinum = 195.084 g/mol.

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.