What are the symbol and name for an element whose average atoms have a mass that is 38.8% of the mass of an average chromium atom?

Q: Calculate the average atomic mass

A:

Q: 198 198 Calculate the percent abundance of copper-63 with a mass of 62.93 amu and copper -65 with a…

A: If A1 and A2 are the mass numbers of two isotopes and X1 and X2 are their pecent abundance then…

Q: Use the information given below to calculate the average atomic mass of element X.

A: The data given is,

Q: 2. A naturally occurring same of an element consists of two isotopes, one of mass 85 and one of mass…

A: The average atomic mass of an element is the weighted average mass of an atoms in a naturally…

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: Answer the questions with the definition and show with a figure where this information is found in…

A: Atomic number : The number of a chemical element in the periodic system, whereby the elements are…

Q: There are two naturally occurring isotopes of rubidium. What is the abundance of each isotope?…

A: The abundance of each isotope is to be calculated.

Q: To the right is a representation of 50 atoms of a fictitious element called westmontium (Wt). The…

A: A mass spectrum is an intensity vs. m/z (mass-to-charge ratio) plot representing a chemical…

Q: A mass of 41.6 g of an element is known to contain 6.59 x 1023 atoms. What is the atomic mass of the…

A:

Q: Write definitions of the terms atomic number and mass number. Which of these can vary without…

A: Atomic number :-  Atomic number is the number of a chemical element in the periodic system, whereby…

Q: An unknown element X has the following isotopes: 140X (89.00% abundant) and 142X(11.00% abundant).…

A: Since,         Average Atomic mass=Σass of Isotope×% of Isotope100

Q: In the first 36 elements, 8 elements have atoms whose average mass is within 0.2 u of being twice…

A: The atomic mass of an element depends on the number of protons and neutrons. The sum of the number…

Q: an imaginary element has two isotopes. the first with an abundance of 46.59% has an atomic mass of…

A: We have to calculate the average atomic mass of this element.

Q: What isotope is used as the standard in establishing the atomic mass scale?  The atomic weight of…

A: The mass number given in the periodic table is the average mass of all the isotopes of an element.…

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: How much (in atomic mass units, amu) would 78 atoms of an element with atomic mass 107.18 weigh?…

A:

Q: "Lithium has two isotopes. Lithium-6 has an actual mass of 6.015 g/mol and lithium-7 has a mass of…

A: Given: There are two naturally occurring isotopes of lithium. Molar mass of isotope 1 i.e. lithium-6…

Q: Calculate the average mass, in grams, of one platinum atom.

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Q: Calculate the mass of 500. atoms of  fluorine (F). Mass =______  g

A: One mole of a substance is equal to 6.023 x 1023 units of that substance  (such as atoms, ions or…

Q: Calculate the number of atoms in sample. 1.87 g Bi

A: Calculate the number of moles of Bi Number of moles of Bi = Given mass of BiMolar mass of Bi= 1.87…

Q: Calculate the atomic mass of naturally occurring chlorine if 77.62% of chlorine atoms are…

A: To calculate atomic mass of chlorine:

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

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Q: Calculate the number of atoms of Zn in a sample with mass = 2811 amu.

A: We have to predict the number of atoms of Zn.

Q: Natural gallium, which has an atomic weight of 69.7230 amu, consists of gallium-69 and gallium-71…

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Q: Calculate the precise mass of each ion to five significant figures. Unless otherwise indicated, use…

A: The ion given is – [CH3Br] + No isotope is indicated. Hence taking the most abundant isotopes of…

Q: Calculate the number of atoms there are in a sample of aluminum that with a mass of 81g

A: Given that:  Mass of Aluminium(Al) = 81g  Molar mass of Aluminium = 27g/mol So, moles of Al =…

Q: Calculate the precise mass of each ion to five significant figures. Unless otherwise indicated, use…

A: An atom is the basic and fundamental unit of matter. An atom consists of electron and the nucleus in…

Q: Given the information below please calculate the average atomic mass for the isotopes. 0.12% O-15…

A: The average atomic mass can be calculated using the formula, Average atomic mass=Natural abundance…

Q: The element silver has two naturally occurring isotopes: 109Ag and 107Ag with a mass of 106.905 amu.…

A: The mass of 109Ag is to be calculated.

Q: An element has three isotopes, A, B, and C. Atomic masses and percent abundances of the three…

A: The concept is to calculate the average atomic mass of an element.The elements having same atomic…

Q: Find the average atomic mass for Li if 7.5 % of Li atoms are 6Li with a mass of 6.015 amu and 92.5%…

A: The average atomic mass of any element is the sum of product of mass of each isotope and their…

Q: explain how we calculate the mass of an atom and why we write this down in atomic mass units

A: Atomic mass of an atom is the sum of total number of protons and neutrons present in the atom. It is…

Q: An unknown element X has the following isotopes: 5X (72.5% abundant) and 67X. What is the average…

A:

Q: On the fictional planet Zeus, boron occurs as 55.46% of 10B (atomic mass = 10.01 u) and 44.54% of…

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Q: What is the average atomic mass of the element below, based on the following illustration of the…

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Q: How many atoms would be present in a 894.22 amu sample of an element that weighs 11.28 amu per atom?…

A: Here we are required to find the number of atoms present in 894.22 amu of sample

Q: This is the average of the atomic masses of all the different isotopes in a sample.

A: We are to discuss what the average of the atomic masses of all different isotopes of an element in a…

Q: Determine Average Atomic Mass for oxygen: Isotope percentage Abundance Actual Mass O-16 99.762%…

A: Average atomic mass of an element is the sum of masses of its isotopes, each multiplied by its…

Q: The element argon has three isotopes and an average atomic mass of 39.948 u. Idenitfy the most…

A: Element Ar having three isotopes one is Ar-36, second is Ar-38 and last one is Ar-40  Ar-36 have…

Q: How many electrons are necessary to produce a charge of -1.0 C? What is the mass of this many…

A: SOLUTION: Step 1: An electron has a charge of -1.6 ×10-19 C. The no of electrons necessary to…

Q: What is the average mass of the atoms ? (Copper-63 has a mass of 62.92960 amuamu, and copper-65 has…

A: The average atomic mass of the element is defined as the sum of the mass of all the isotopes present…

Q: An unknown element X has the following isotopes: ⁵⁸X (68.00% abundant), ⁶⁰X (26.00% abundant), ⁶²X…

A:

Q: The element argon has three isotopes and an average atomic mass of 39.948 u. Idenitfy the most…

A: Given that, Average  Atomic mas s of At=39.948 amu

Q: What is the average mass of a single aluminum atom in grams

A: We know that mass of 1 mole of Aluminium atoms is equal to 27g Also 1 mole of aluminum atoms means…

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: An unknown element X has the following isotopes: ⁵²X (79.50% abundant), ⁴⁹X (8.00% abundant), ⁵⁰X…

A:

Q: An unknown element X has the following isotope: 25X (80.5% abundant) and 27X (19.5% abundant). What…

A: Given : Isotope 1 : X25            Atomic Mass = 25           % Abundance = 80.5 %…

Q: 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…

A:

Q: 3) Calculate the atomic mass of the following element with three isotopes (masses and relative…

A: Given information: 27.9769 u, 92.2232% 28.9765 u, 4.6858% 29.9738 u, 3.0921%

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.