Assume that a certain element (let's call it X) has two (and only two) isotopes: 35x (35.0 a.m.u.) and 37X (37.0 a.m.u) with the natural abundances of 70.0% and 30.0%, respectively. What is the atomic weight of X? 35.2 a.m.u. 35.6 a.m.u. 36.0 a.m.u. 36.8 a.m.u. 36.4 a.m.u.

Q: A sample has 8.63 x 10 atoms of boron. How many moles of boron does this represent? O1.41 .014 O…

A: Given : Number of atoms of boron = 8.63 X 1021 atoms

Q: What number of atoms of nitrogen are present in 3.54 g of each of the following? a. glycine: C2H5…

A: Given, Calculate the number of atoms of Nitrogen are present in 3.54 grams of each of the following:…

Q: An element X occurs as three stable isotopes: X-21, X-22 and X-23. X-21 is 90.48% abundant and X-22…

A: Given : Element X exists as three stable isotopes. The three isotopes are: X-21 X-22 X-23

Q: made-up compound: J2(QZ3)2 Determine the number of molecules of J₂(QZ3)2 in 7.2 grams of J₂(QZ3)2…

A: Given -> Weight of J2(QZ3)2 = 7.2 gram  Atomic mass of J = 19.00 g/mole Atomic mass of Q = 35.00…

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: The reaction of sulfur powder (S8) with oxygen gas (O2) results in the formation of one of many new…

A: We know that, molar mass of O = 15.999 g/mol molae mass of S = 32.065 g/mol

Q: None

A: Step 1: Calculation of the molar mass of compound Given,molar mass of X = 5.09 g/mol molar mass of Z…

Q: There are 1.8 x 1024 atoms of chlorine in a sample of magnesium chlorate, Mg(CIO3)2. What mass of Cl…

A: Given: Atoms of chlorine in the sample = 1.8×1024 Molar mass of Cl = 35.5 g/mol

Q: How many grams of Ar are there in 4.28 moles of Ar? How many grams of Xe are there in a sample of…

A: (1) Atomic mass of argon gas is = 39.948 u While given moles of argon = 4.28 moles Then, by…

Q: Magnesium exists in nature as three stable isotopes. Suppose you determine that 9.87 moles of…

A: Given - Exact masses of isotopes of Mg 25Mg = 24.9858 amu 24Mg= 23.9850 amu. 26Mg = 25.9826 amu. To…

Q: #2 pls

A:

Q: Vitamin A has the molecular formula C20H300. How many oxygen atoms are in 6.02 x 1023 molecules vit…

A: we have to calculate the number of atom of O

Q: An element consists of two isotopes and has an average atomic weight of 85.561 a.m.u. The abundance…

A:

Q: CROSOTTODICH Calculate average atomic weight. Calculate the atomic weight for bromine. It has two…

A:

Q: An unknown element is a mixture of isotopes ¹²⁰X and ¹²²X. The average atomic mass of X is 121.47…

A: For an element that exists as a number of isotopes, its atomic mass is calculated by taking an…

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: What is the molar mass of the solid C 6H8 N4 O 4?     2. The following  18  O  -2. How many…

A:

Q: Fulminating silver is the historic name for compounds that contain silver and which explode…

A:

Q: 14. Copper has two isotopes, Cu-63 and Cu-65. The average atomic mass of copper is 64.928 g/mol.…

A: Average atomic mass = 64.928 g/mol  % abundance = ?

Q: If a compound is made up of carbon and hydrogen only, what is the mass of its sample that contains…

A:

Q: hat is the mass of 4.50 x 1022 Cu atoms? Multiple Choice 747 x 102 g 4.75 g

A: Molar mass Cu is 63.546

Q: Prevacid is used to treat gastroesophageal reflux disease (GERD). The chemical formula of Prevacid…

A: Given, Prevacid is used to treat gastroesophageal reflux disease (GERD). The chemical formula of…

Q: The mass spectrum of an organic compound shows the relative abundances of M to be 37.45% and M + 1…

A: Mass spectrometry is an important tool for the determination of the molecular mass of the compound…

Q: There are 1.8 x 1024 atoms of chlorine chlorate, in a sample of magnesium Mg(CIO3)2. What mass of O…

A:

Q: The mass spectrum of a sample of an element is shown. 50 40 Relative abundance 30 40 50 60 70 20 30…

A: Mass spectrum is the technique used in analytical chemistry for the separation of ions based on the…

Q: What is the mass of 2.5 moles of zinc chloride (ZnCl₂)? bign Li Be Na Mg 3 Rb kidn 341 g Fr Ra…

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.