a. Using the average atomic mass, calculate the number of atoms present in 2.70 x 104 amu of oxygen. atoms

Q: A brass alloy contains 78.9% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

A: We have to predict the moles of Zn and atoms of Zn.

Q: Calculate the number of moles of He atoms present in 5.55 g of He.

A: Given that, mass of He= 5.55 g molar mass of He= 4 g mol-1 then,

Q: number of atoms in 37 g of vanadium

A:

Q: 22 11. Find the mass in grams of 2.54 x 10 molecules of H,SO,.

A: Number of molecules of H2SO4 = 2.54 × 1022 molecules. Mass of H2SO4 (in grams ) = ?

Q: Find the mass of 4.5 moles of Zinc (Zn).

A: Given, moles of Zinc (Zn) = 4.5 moles mass of Zinc (Zn) = ? g Note: molar mass of Zinc (Zn) = 65.38…

Q: Calculate the total number of N atoms in 23.8 g N2O5. O 2.65 x 1023 total N atoms O 9.31 x1023 total…

A:

Q: Determine the number of atoms in 39.0 grams of calcium, Ca. (The mass of one mole of calcium is…

A: Mass of calcium = 39.0 grams Mass of 1 mol of calcium = 40.08 g. Number of atoms = ?

Q: Calculate the number of moles of He atoms present in 5.55 g of He.

A: Molar mass of He, Mwt = 4 g/mol Given weight, W = 5.55 g

Q: The atomic mass of aluminum is 26.982u. How many alluminum atoms are in a 4.55g sample of aluminum?

A: Mass of aluminium sample=4.55 g The atomic mass of aluminum =26.982 u Moles of aluminium=4.5526.982…

Q: A sample of propane, C3H8C3H8, contains 16.1 molesmoles of carbon atoms. How many total moles of…

A: Given, the sample of propane (C3H8) contains 16.1 moles of carbon atoms. In propane, the carbon…

Q: alculate the number of moles of He atoms present in 4.65 g of H

A: Number of moles = weight / atomic weight    Given ,  weight = 4.65g Atomic  weight of He = 4 g/mol

Q: A sample of ammonia Nh3 contains 1.2 X 1023 hydrogen atoms. How many NH3 molecules are in the…

A: Ammonia (NH3) is a molecule that exists as a gas at Standard temperature (298 K). It contains atoms…

Q: Determine the mass, in grams, of 0.465 moles of S (1 mol of S has a mass of 32.07 g).

A: Given that, Moles of S= 0.465 moles MM of S= 32.07 g mol-1 then,

Q: A sample of cyanic acid, HCN, contains  3.33 x 1022 atoms. a. How many moles of cyanic acid are in…

A:

Q: Calculate the number of moles in 9.364 x 1018 atoms of Ca

A:

Q: Calculate the number of moles of He atoms present in 6.17 g of He.

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: How many Co atoms are there in 4.62 moles of Co? atoms

A: Number of moles of Co = 4.62 mol Number of bromine atoms = 6.00 × 1024 atoms

Q: 1. Calculate the formula mass of (NH4)3ASO4. A. 417.80 amu B. 193.05 amu C. 165.02 amu D. 156.96 amu…

A: 1. Formula mass of a compound is the sum of the masses of all the atoms present in the compound.

Q: Determine the mass, in grams, of 0.785 moles of Si (1 mol of Si has a mass of 28.09 g)

A: The number of molecules or atoms present in the one mole of the substance is equal to the Avogadro…

Q: An unknown compound containing tellurium and bromine is analyzed and it is determined that 28.53% of…

A: According to given data%mass of Tellurium in compound=28.53 %and% mass of Bromine in compound=71.47…

Q: Convert between moles and numbers of atoms. A sample of lithium contains 2.24x1025 Li atoms. What…

A:

Q: Suppose you have a sample of sodium weighing 11.74 g. How many atoms of sodium are present in the…

A: The number of moles (n) of sodium present in the given sample is calculated from the expression (1).…

Q: Determine the number of atoms in 63.0 grams of calcium, Ca. (The mass of one mole of calcium is…

A: Given : Mass of 1 mole of calcium = 40.08 g And mass of calcium = 63.0 g

Q: An allotrope of elemental sulfur is the cyclic molecule S6 . Calculate the number of molecules and…

A: The number of molecules and moles are related to each other by the given relationship as; 1 mole =…

Q: 7.77 g of titanium (II) carbonate contains ........  moles of carbon.

A: Applying concept of mole n= w/M

Q: A brass alloy contains 78.6% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

A:

Q: One atomic mass unit has a mass of 1.6605402 × 10-24 g. a)Calculate the mass, in grams, of one…

A: The mean atomic mass of magnesium stands at 24.305 atomic mass units (amu). An atomic mass…

Q: Determine the mass, in grams, of 0.635 moles of I (1 mol of I has a mass of 126.90 g)

A: Given: Moles of I = 0.635 mol Molar mass of I = 126.90 g/mol

Q: Use the average atomic mass to calculate the number of moles of the element present in 8.15g of…

A: Given , Mass of Neon= 8.15 g Average atomic mass of Neon= 20.18 g/mol

Q: In 6.9 g of aluminum, there are ______ x 1023 aluminum atoms present

A: Molecular mass of atom contains 6.023 × 10^23 atoms. Molar mass of aluminium is 26.981 g/mol

Q: Mass, S s of 32.07 g).

A: Number of moles is calculated by dividing the given mass with molecular mass. Given molecular mass…

Q: Convert 3.69 moles of Al (OR A l) to grams. Do not type units with your answer. The atomic weight…

A:

Q: Determine the number of atoms in 31.0 grams of calcium, Ca. (The mass of one mole of calcium is…

A: Interpretation-  To determine the number of atoms in 31.0 g of calcium ( Ca ) molar mass is already…

Q: convert 1.89 • 1024 atoms of carbon to moles of carbon

A: Calculation of moles of Carbon :

Q: Determine the number of atoms in 35.0 grams of nickel, Ni. (The mass of one mole of nickel is 58.69…

A: Given, Mass of Ni = 35.0g

Q: Determine the mass, in grams, of 0.805 moles of S (1 mol of S has a mass of 32.07 g).

A: The general expression that shows relationship between moles and mass is as follows, Moles=MassMolar…

Q: a. Use the average atomic mass to calculate the number of moles of the element present in 6.70 g of…

A: a) given, mass of neon = 6.70 g Number of moles of neon = ? Note: Atomic mass of neon = 20.18 g/mol

Q: Calculate the number of atoms of copper in 2.65 g of copper.

A: The number of atoms of copper in 2.65 g of copper needs to be determined. Required information:…

Q: Suppose you have a sample of sodium weighing 11.50 g. How many atoms of sodium are present in the…

A: Information of question ,

Q: calculate the number of atoms in 1.72 grams of barium

A:

Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.