Why is the atomic weight of chlorine 35.4527 in stead of exactly 35

Q: The natural isotopes of boron are B-10 and B-11. If borons atomic mass is 10.81 amu, what is the…

A: Given : Atomic mass of Boron = 10.81 amu. And the isotopes of boron are  1) B-10 with atomic mass =…

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: [References] An element consists of 0.19% of an isotope with mass 135.907 u, 0.25% of an isotope…

A: Given : Mass of isotope 1 = 135.907 u  Abundance of isotope 1 = 0.19 % Mass of isotope 2 = 137.9060…

Q: 8. One mole of an atom of a substance is equal to the: a Gram atomic mass of the element b Gram…

A: The mass of one mole of an element equal in gram to rhe atomic weight called gram atom. Gram atomic…

Q: 6Li + N2 --> 2Li3N If 50 g Li react with 40 g N2, what is the maximum mass of lithium nitride…

A: To Solve this problem we will the given balanced chemical equation.  First we will find the limiting…

Q: If the rust found spread over the surfaces of a steel car body contains a total of 2.331×1023 oxygen…

A:

Q: A mixture of 130.5 g of P and 134.8 g of O, reacts completely to form P¸O, and PO10. Find the masses…

A: Given - Grams of P = 130.5 g Grams of O = 134.8 g This means that 8 moles of P reacts with 8 moles…

Q: How many silver atoms are contained in 1.75 moles of silver?

A: 1 mole of a substance is equal to the Avogadro number of atoms.  1 mole =6.022 x 1023 atoms.

Q: actual mass of a 37Cl atom is 36.966 amu. Calculate the mass defect (amu/atom) for a 37Cl atom.

A: Mass defect of the atom = [Z(mass of proton + mass of the electron)]+(A-Z) mass of neutron]- the…

Q: Answer the following questions based on information contained in the statements you wrote for…

A: so 1mole of CO2 has 2mole of Oxygen atom

Q: H.W.: 1. Calculate the number of grams in one mole of CaSO,7H2O? (Atomic weight Ca-40 S-32 O-16…

A: Given Number of mole = 1 mole  Molar mass of CaSO4.7H2O  = 262 gm/mole  mass = ?

Q: An unknown element is a mixture of 129X and 132X. the average mass of X is 130.79 amu. What is the…

A: Let x be the percentage abundance of 129X and (1-x)  be for 132X Average mass = 130.79 amu  Atomic…

Q: A 6.700-g hydrate of sodium sulfate, Na2SO4-nH2O loses 2.896 g of its mass upon heating. The mass…

A: In this question, we will determine the value of n ( where n is the number of water molecules )…

Q: 3 A2B + 6 CD --> 6 AD + 3 C2B (OR 3 A2 B + 6 C D right arrow 6 A D + 3 C2 B) Calculate the number…

A:

Q: Hydrogen sulfide is a gas with the odor of rotten eggs. The gas can sometimes be detected in…

A: Relative atomic weight is defined as the ratio of average mass of an element in a given sample to…

Q: Determine the mass, in grams, of 0.710 moles of S (1 mol of S has a mass of 32.07 g).

A:

Q: Signature of a person increased the mass of paper by 1.2 grams with lead pencil. How many atoms of…

A: Given that Mass of C=1.2gram Molar mass of C=12g/mol No. of atoms of C=?

Q: This question will walk you through the process of calculating the number of atoms present in a…

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Q: 1. All atoms of a given element have the same c. number of nucleons. d. number of protons. a. mass…

A: 1. Answer - The correct option is (d) number of proton. All atoms of an element have the same number…

Q: 3.50 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A: The empirical formula is the chemical formula of any compound that represents the proportions of…

Q: How many atoms are in 48.4 grams of Pb? Atomic weight of Pb=207.20

A: Given data is as follows: The mass of Pb = 48.4 g The atomic mass Pb = 207.20 g/mol

Q: Element Kittypurrium (named after one of TA's cats) has two isotopes: Isotope 1 has an atomic…

A: Percent of isotop 1 = 91.162%   Atomic weight of isotop 1 = 40.005 g/mol  Percent of isotop 2 =…

Q: 8.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A: Moles of CO2 and H2O are calculated as shown below,

Q: 18. A compound with molecular mass of 74.1 g/mol is found tO contain 64.8% carbon, 13.5% hydrogen,…

A:

Q: Express your answer as a chemical equation?

A: From the figures we can see that Lavender spheres (A) are nothing but an isolated atom and tan…

Q: In neutron logging the atomic particles called neutrons from sonde are sent through the formation.…

A: In neutron logging the atomic particles called neutrons from sonde are sent through the formation.…

Q: the average mass, in grams, of a single gold atom (mAumAu = 196.97 amuamu )

A: Given: Atomic mass of Au = 196.97 amu = 196.97 g/mol. Assuming 1 mole of Au atoms.

Q: Sample

A: Given data set: Initial mass of the radioactive metal = 1024 grams Final mass of the radioactive…

Q: 5) Find the mass of 0.02 moles of K,Cr,O,. 7'

A:

Q: Suppose a piece of silver jewelry contains 6.23x1022 atoms of silver (Ag). Part A How many dozens of…

A:

Q: A sample of a compound synthesized and purified in thelaboratory contains 25.0 g hafnium and 31.5 g…

A: GIVEN: Mass of Hafnium = 25.0 g Mass of tellurium=  31.5 g Mass of Hafnium present in the sample…

Q: 2.708 gram sample of an organic compound containing C, H and O is analyzed d 6.157 grams of CO2 and…

A:

Q: Sample of MGSO4 x NH2O contains 7.81 grams of MGSO4 and 8.91 grams of H2O, What is the value of N?

A: Given: Mass of MgSO4 = 7.81 g Mass of H2O = 8.91 g Molar mass of MgSO4 = 120.366 g/mol Molar mass of…

Q: Covert 2.34 x 10^24 molecules of N2 to moles

A:

Q: why

A: Given,Mass of the sample = 1.0 g1.0 amu = 1.0 g/molFrom the mass spectrum given, the sample have…

Q: A 1.000g mixture of As4S6(s) and AS4S4(s) was burned in excess O2. The products were As406(s) and…

A: The balanced chemical equation for the reaction between As4S­6 (s) and As4S4 (s) is shown below.…

Q: What do 24 grams of magnesium (Mg) and 32 grams of sulfur (S) have in common? A)Nothing B)Number…

A: We have to predict the common thing in between Mg and S.

Q: In the Star Wars series, the death star is a spherical space station and weapon with a diameter of…

A: The diameter of death star is 99 miles. The diameter of solid iron sphere is 5.81 times larger than…

Q: (2) (3) If an atom with 38 protons undergoes B-decay, the species formed will have, (A) 37 (B) 38…

A: The nucleus undergoes these emission reactions due to more number of neutrons than protons in the…

Q: A 21.37 gram sample of an unknow element contains 0.3267 moles what is the identity of the element

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Q: atomic mass of an element related to its molar mass?

A:

Q: Calculate the number of atoms in a 2.70×1032.70×103 g sample of strontium. number of atoms:

A: Gram atomic mass of strontium is 87.62 g.

Q: Mass of 13C = 13.99456 Mass of 12C = 11.98994 %3D If the molecular weight of C is 12.01 what are the…

A: Given : There are only two naturally occurring isotopes of carbon which are 14C and 12C. Mass of…

Q: 3 A2B + 6 CD --> 6 AD + 3 C2B (OR 3 A2 B + 6 C D right arrow 6 A D + 3 C2 B) Calculate the number…

A: Given 3 A2B + 6 CD --> 6 AD + 3 C2BThe atomic weight of A is 15.0 grams/mol  The atomic weight of…

Q: How much does 36 moles of Carbon weigh?

A: Moles of carbon = 36 moles Weight of Carbon = ?

Q: The molar masses of the four natural isotopes of chromium are 50 g mol-1, 52 g mol -1 53 g mol -1…

A: Given: The molar mass of four isotopes of chromium is 50 g/mol, 52 g/mol, 53 g/mol, and 54 g/mol.…

Q: 0.360 g sample of an organic compound containing carbon, hydrogen, and oxygen was burnt in excess…

A: Mass of the compound = 0.360 g  Mass of oxygen + Mass of Hydrogen + Mass of Carbon = 0.360 g

Q: Calculate the percent abundance of the two isotopes of a fictional element, georgium, if it has an…

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.