Why would the collective mass of twenty pennies not be equal to ‘20 x’ the mass of any individual penny?

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

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

Q: An unknown element is a mixture of isotopes 120X and 122X.  The average atomic mass is 120.70.  What…

A: Suppose percentage abundance of 122X = A percentage abundance of  120X = (100 - A) Fraction of 122X…

Q: One way in which Earth’s evolution as a planet can be understood is by measuring the amounts of…

A:

Q: What is the average mass, in grams, of one Zna Multiple Choice O 1661 x 10 24 O 65.39 amu O 65.39 g…

A: Molar mass of Zn = 65.38 g/mol

Q: What fraction of the a particles in Rutherford’s gold foil experiment are scattered at large angles?…

A: Given , diameter of gold atom = 2.7 Å  diameter of the nucleus = 1010-4Å

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: Calculate What is the difference expressed in kilograms between the mass ofa proton and the mass of…

A: Kilogram is the SI unit of mass. Mass of protons is 1.67×10-27Kg. Mass of electrons is…

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: 18. How many moles of gold atoms do 3.45 X 1044 gold atoms constitute?

A: We know that the number of atoms is given by below expression  number of atoms = moles X avogadro…

Q: 1s22s22p63s23p4 is what element?

A:

Q: Determine the number of atoms in a 1.00 mg sample of Carbon-14?

A:

Q: If an element, El, has two isotopes with the masses and abundances listed below: 72El: 72.1961 amu;…

A: The element that possesses distinct number for neutrons (might be less or more) as compared to its…

Q: What is the change in mass of 180 Ta when it is formed from protons, electrons and neutrons if the…

A:

Q: A 45.62-gram sample of calcium hydrogen sulfate [Ca(HSO4)2] would contain how many total atoms? Is…

A: Answer:- This question is answered  by using the simple concept of calculation of total number atoms…

Q: Assume a 1.2 kg sample of a compound contains 0.9 kg of carbon. to one decimal place there are how…

A: Given 1.2 Kg of a compound contains 0.9 Kg of carbon, C.

Q: What is the mass in kilograms of 5.6 x 1027molecules of carbon tetraiodide?

A: Number of molecules of carbon tetraiodide (CI4) is 5.6 × 1027 One mole contains Avogadro’s number of…

Q: One atom of Se-77 is 6.410 times as heavy as an atom of C-12. What is the atomic mass of Se-77?

A:

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

A: Given : There are 2 naturally occurring isotopes of europium. Mass of 151Eu = 151.0 amu Mass of…

Q: Consider a 5.00 kg bag of sugar, C12H22O11, and answer the following question. Be sure to show your…

A: Given: Mass of sugar = 5.00 kg To calculate the mass of Carbon

Q: The radioactive nuclide with the symbol 75Se is used to measure the shape of the pancreas. What is…

A: The atomic number of Se is 34 and the mass number of this radioactive nuclide of Se is 75. Atomic…

Q: 18.5 How many moles are in a 2.40 cm × 2.40 cm × 2.40 cm cube of copper?

A:

Q: What is the average mass, in grams, of one Zn atom? Multiple Choice 65 39 g 65.39 amu 1.09 x 1022g…

A: The mass of an atom can be determined from the molar mass and Avogadro's number. The number of atoms…

Q: What is relative abundance

A: Given question is :  What is relative abundance = ?

Q: How much does 8.44 x 1063 molecules of water weigh?​

A: Molecular weight of water =18g/mol i.e. 1  mol of water (6.023 x 1023 molecules) of water has mass…

Q: An isotope with atomic number 64 and mass number 158 is found to have a mass ratio relative to that…

A: Given An isotope has an atomic number of 64 and mass number of 158 It has a mass ratio of 13.16034…

Q: What mass of magnesium contains the same number of particles as there are in 6g of carbon 12

A: Given,  Mass of C = 6g  What mass of magnesium contains the same number of particles as there are in…

Q: Consider a 5.00 kg bag of sugar, C12H22O11, and answer the following question. Be sure to show your…

A: Given: 5.00 kg bag of sugar, C12H22O11

Q: 410 186 412Z X 410 183 Y 186 Which two are isotopes? A. X and Y B. X and R C. Y and R D. Z and R E.…

A:

Q: 19. Two particles X and Y have the following composition: X: 17 protons, 18 neutrons, 17 electrons…

A: The question is based on the concept of atomic structure. there are various subatomic particles like…

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: How many moles of aluminum do 1.42 x 10^24 aluminum atoms constitute?

A: 1 mol of any atom has 6.023 ×1023 number of atoms .

Q: b) The mass of 205TI is about 204.9744 amu. Why then does the periodic chart have an atomic weight…

A: It is given that mass of 205 Tl = 204.9744 amu.  But this do not match with molar mass of Tl which…

Q: If a silver dollar contains 91.0% silver by mass, how many kilograms of silver can be extracted from…

A: As per the given information given silver dollar contains 91.0% silver  here, 1 kg of silver dollar…

Q: 1. Ammonia can be decomposed to give nitrogen and hydrogen in a mass ratio of 4.67:1.00. If the…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: What is the average mass, in grams, of one Zn atom?

A: Given :- Number of atoms of Zn = 1 atom  To calculate :-  Average molar mass of single atom of Zn…

Q: The mole is defined as the amount of a substance containing the same number of particles as exactly…

A: An isotope is the chemical element that has same number of protons in the nucleus having same atomic…

Q: There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 10.93%. Now…

A:

Q: There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 14.63%. Now…

A:

Q: 2.A student says,“A carbon atom is not the smallest possible amount of carbon, because atoms are…

A: Atoms are made up of smaller particles like electrons, protons and neutrons. Similarly, a carbon…

Q: if a particle has a mass 5.7661x10^-28 kg, what would its mass be in amu?

A:

Q: Consider the following equation: The mass number of element X is: 247A + 18B → 89C + {x}X + 2 1n

A: 247A  + 18 B ---------------> 89C  +   xX  + 2  1n

Q: What is the mass (in grams) of one Ni-58

A: Given is number of atom = 1 Mole represent the quantity of fundamental particle.

Q: Consider a 5.00 kg bag of sugar, C12H22O11, and answer the following question. Be sure to show your…

A: Given:  Mass of sugar =5.00 Kg To Calculate: Mass of H atom contained in the sugar

Q: A sample of aluminum foil contains 5.70 x 1023 atoms. What is the mass of the foil?

A:

Q: How many moles of carbon are there in a diamond weighing 2.11g

A: Mole is defined as a unit of measurement for the amount of substance in the International System of…

Q: How many protons are there in the nucleus of Cu-64?

A: Atomic number (Z) is defined as number of protons present in an atom.  In a neutral atom number of…

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.