1. How many moles of tungsten atoms are there in 4.8 x 1025 atoms of tungsten?

Q: .........grams of zinc arsenite contains 4.5 x 1024 atoms of arsenic.

A:

Q: A mass of 145 g of a certain element is known to contain approximately 3.64 x1024 atoms. What is the…

A: Let the molecular weight of the element is M gm/mol.  Moles = weight/mol. wt.  Or, moles = 145/M  We…

Q: How many Sc atoms are there in 5.35 moles of Sc?

A:

Q: How many moles are there in 2.75 x 10^24 atoms of copper?

A: we know that one mole of copper contain Avogadro's number of atoms Avogadro's number= 6.023 × 1023

Q: You have a compound with the formula X₂Y. X is an isotope with a mass of 20g/mol and Y is an isotope…

A: Mass of X = 20 g/mol Mass of Y = 43 g/mol

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: A 10.5710.57 g sample of NaBr contains 22.3422.34% Na by mass. Considering the law of constant…

A: According to law of constant composition, the mass percent of any element in any compound always…

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: How much does 4.28 x 10 21 atoms of Nickel weigh?

A: We know that, one mole of any substance contains 6.022 × 1023 atoms. We can determine the weight by…

Q: The atomic masses of 203Tl and 205Tl are 202.972320 and 204.974401 amu, respectively. Calculate the…

A: Let the isotope of Tl203 be x. Let the isotope of Tl205 be (1-x). Set up the equation.…

Q: How many moles of atoms are there in 2.12 x 10 43 atoms of Nickel?​

A: 1 mole = 6.022×1023 [ Avogadro's number ] If any metal consists of 6.022×1023 atoms it is said to…

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…

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Q: ilver is composed of two naturally occurring isotopes: Ag-107 (51.839%) and Ag-109. The ratio of the…

A: First calculate the percent abundance of Ag-109.

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: For which element does a sample of 1.5055 × 1024 atoms have a total mass of 70.215 g?

A: The objective of the question is to identify the element for which a sample of 1.5055 x 10^24 atoms…

Q: A 64.36 g sample of XO2 contains 25.79 g of oxygen atoms. What is element X?

A: Given,      A 64.36 g sample of XO2 contains 25.79 g of oxygen atoms . To determine the identity…

Q: Naturally occurring Europium (Eu) consists of two isotopes with a mass of 151amu and 153amu. If the…

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Q: How many grams does 1.44 x 1028 carbon atoms weigh?

A: To calculate the mass in grams for the atoms  First we have to convert the number of Atoms into…

Q: Bromine has two naturally occurring isotopes (Br-79 and Br-81) If the natural abundance of Br-79 is…

A: Given: There are two naturally occurring isotopes of Br. The abundance of isotope 1 = 50.69 % Mass…

Q: What is the mass in 3.52 x 10^23 water molecules?

A: mass of 3.53 ×1023 molecules is 10.45g

Q: A sample of Cl 2O was composed of 5.921 g of chlorine and 5.342 g of oxygen. How many grams of…

A: Given: In sample 1, Mass of Cl in Cl2O = 5.921 g. And Mass of O in sample 1 Cl2O = 5.342 g. And in…

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: Copper has two naturally occurring isotopes, 63 Cu(62.9396amu)and 65 Cu(64.9278amu). If copper has…

A: %abundance of cu63= |63.546-64.9278|÷|64.9278-62.9396| So solve it  and  27% Cu63 Same for CU65= 73%…

Q: What is the molarity of potassium ions in a 0.122 M K2Cro, solution?

A: This question is related to general chemistry. In the given question The salt potassium chromate…

Q: What is the mass of a mole of electrons if one electronhas a mass of 9.11 × 1 0 -28 g?

A: Because, 1 mole=6.022×1023 molecules/particles Therefore, 1 mole of electron=6.022×1023 electrons

Q: TO McGraw Hill Campus ||| Calculate the Molar Mass of Acet X +…

A: A mole is defined as the amount of a substance that contains 6.022 X1023 entities like particles,…

Q: 7.53 × 10^23 molecules of an element has a mass of 88.64 g. What is the identity of this molecular…

A: 7.53 × 1023 molecules of an element have a mass of 88.64 g. This molecular element is to be…

Q: How many atoms are contained in a block of aluminum metal measuring 4.0 mm x 9.0 mm x 11 mm? The…

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Q: Which of the following isotopes has the highest number of neutrons? 15 7F 17 8.

A: The given options are,

Q: Consider two compounds. Compound A contains 2.77 g of phosphorus and 9.53 g of chlorine. Compound B…

A: Given,Mass of Phosphorus in compound B =11.9gMass of chlorine in compound B =40.9g

Q: The atomic mass of bromine is 79,904 amu. The atomic mass of the Br-81 isotope is 80.9163 amu and…

A: The atomic mass of bromine is 79.904 amu. This is actually the average atomic mass of Bromine which…

Q: How many silver atoms are there in 3.78 g of silver?

A: Given information: Mass of silver = 3.78 g

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: There are only two naturally occurring isotopes of Copper, 63 Cu and 65 Cu. Copper has an atomic…

A:

Q: Gallium consists of two isotopes, gallium-69 and gallium-71. Gallium-69 has a mass of 68.926 u and a…

A: Fractional abundance is the abundance shown in the fraction. It is the proportion of various isotope…

Q: A 12.0912.09 g sample of NaBr contains 22.3422.34 % Na by mass. Considering the law of constant…

A: According to the law of constant composition, the ratio of the mass of elements in a compound…

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

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

Q: Element X has a molar mass of 4.91 g and element Z has a molar mass of 8.09 g. What is the mass of…

A: Step 1: Find the mass of 5.95 moles of the compound X9Z1 : Element X has a molar mass of 4.91…

Q: How many moles of hydrogen atoms are there in 0.375 mole of C 2H 6?

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Q: How many hydrogen atoms are there in 2.50 moles of C6H12O6

A:

Q: How many moles of neon would there be in 7.59 x 1025 neon atoms?

A: Avogadro's number (N) = 6.022 x 1023 atoms/mole No of moles = No of atoms / N                    =…

Q: What is the mass of 4.50 x 10 22 Cu atoms?

A:

Q: How many moles of neon would there be in 7.59 x 1025 neon atoms?

A: Given that : Atoms of neon = 7.59 x 1025 atoms Moles of neon =?

Q: There are two naturally occurring isotopes of europium, 151Eu(151.0 amu) and 153Eu(153.0 amu). If…

A: Given information:Two isotopes of europium, 151Eu (151.0 amu) and 153Eu (153.0 amu)Atomic mass of Eu…

Q: determine the number of carbon atoms in a one-carat diamond.

A:

Q: A fictitious element only has two naturally occurring isotopes: X and Y. If isotope X has a mass of…

A:

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.