How many protons (p), neutrons (n), and electrons (e) are in one atom of  23  12   Mg  ? (*23 is the first number on top and 12 is the second number on the bottom).   a. 12 p, 12 n, 12 e   b. 12 p, 11 n, 12 e   c. 12 p, 11 n, 10 e   d. 12 p, 11 n, 14 e

Q: 107. Prepare a table like Table 4.2 for the four different isotopes of Sr that have the natural…

A: The given atomic masses and % abundance are: mass of isotope (amu) % abundance 83.9134 0.56…

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: (1) How many protons, neutrons, and electrons are in C ? 16 (2) How many protons and electrons are…

A: An atom basically consists of proton, neutrons and electrons. The protons and neutrons are present…

Q: 39. A 540-g aluminum rod contains A. 20.0 mol of aluminum B. 540 Al atoms C. 1.2 x 1024 Al atoms D.…

A: A) Moles = Mass / Molar Mass Molar Mass of Al= 26.98 g/mol So Moles of Al= 540 /26.98…

Q: (d) CO(NH2)2 (aq) + H2O (1) 2 CO2 (g) + 2NH3 (g) AH = +28.4 kkal (e) N204 (g) 2NO2 (g) AH = +14 kkål…

A: "Since there are multiple sub-parts in this question and it is not mentioned that which one has to…

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 6.23 times larger than…

Q: In honor of the late Alex Trebek, your Chemistry class holds a Jeopardy tournament. The Final…

A: Since you have posted more than one question, we are doing first for you. To do the rest repost the…

Q: a) How many electrons are necessary to produce a charge of -1.2 C? Express your answer using two…

A:

Q: A new element, greenriverium (Gr), has three naturally-occurring isotopes. Isotope 1 has a mass of…

A: The atomic mass is the average mass of all the isotopes. So that we calculate the average mass with…

Q: The following shows the mass ratio of Ca and CI2 and the mass of CaCl2 formed in various…

A: The mass ratio of calcium and chlorine and the mass of calcium  chloride obtained in four different…

Q: Bromine has two naturally occurring isotopes (Br-79 and Br-81) and has an atomic mass of 79.904 amu.…

A: The given data contains, Atomic mass of Br = 79.904 amu. mass of isotope 81Br = 80.9163…

Q: 2. Cl- F- 16 0-2 35 19 8 17 Number of Number of Protons=. Number of Protons=_ Protons= Number of…

A: Any element of the symbol  xAy the number of protons and electrons is the same as the atomic number…

Q: 15. A chemist has 2.50 grams of magnesium. How many particles of magnesium does the chemist have?…

A: let us try to understand the mole concept.

Q: Carbon exists as 3 isotopes. It is 88% C-12, 1% C-13 and 11% C-14. What is the average atomic mass…

A: average atomic mass= isotop% multiplied by atomic mass /100

Q: The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the…

A:

Q: A silver wire has a diameter of 0.500cm what length of the wire contains exactly 1.0×10²³ atoms of…

A: Given: Diameter of the wire = 0.500 cm  And the number of atoms of Ag wire = 1.0 X 1023 atoms.

Q: Assume silicon has three major isotopes in nature as shown in the table below.Fill in the missing…

A: Given the details of isotopes of Silicon: Isotope Mass (u) Abundance 28Si 27.98…

Q: . Suppose you have a sample of sodium weighing 14.50 g. What mass of potassium would you need to…

A: Atomic mass of sodium=23 Atomic mass of potassium=39 Number of mole=given mass/molar mass So,…

Q: Consider chlorine, which occurs as a mixture of two isotopes: chlorine-35, with a natural abundance…

A:

Q: Cerium is the most abundant rare earth metal. Pure cerium ignites when scratched by even a soft…

A: The Isotopes given are Ce-136(atomic mass=135.907 amu), Ce-138(atomic mass=137.905 amu),…

Q: Explain why the atomic mass listed on the periodic table is 126.9 amu for an atom of iodine and, for…

A: Isotopes are the compounds which have same atomic number but different mass number.

Q: 1. Naturally occurring chlorine that is put in pools is 75.53 percent"CI (mass = 34.969 amu) and…

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

Q: a. 0 35. Rubidium has two naturally occurring isotopes, Rb-85 (relative mass 84.9118 amu) with %…

A:

Q: On a planet in a separate solar system, silver has an atomic weight of 107.41 g/mol. a) Much like on…

A: The isotopes of silver given are, And the average atomic weight of the silver = 107.41 g/mol.

Q: 88) Calculate the number of atoms in each sample a) 14.955 g Cr b) 12.899 g Pt c) 39.733 g S d)…

A: Atomic mass of Cr = 55.996g/mol Atomic mass of Pt = 195.084g/mol Atomic  mass of S = 32.065 g/mol…

Q: 13) How many neutrons are in carbon-12 ? A) 7 B) 8 C) 6 14) Identify the chalcogen that has 18…

A:

Q: hydrogen helum H Не 1.0079 hium 4.0026 noon berylikun boron carbon ritrogen oygen fluorine 10 Li Be…

A: The correct option is:

Q: Calculate the mass of a gold-197 atom using the information from question 9 and the masses of the…

A: The ratio of mass to the volume of the solution is known as density.

Q: 1.Determine the number of protons, electrons, and neutrons present in (a) 32P (b) 98Mo (c) 44Ca…

A: Since you have posted multiple questions, we will solve first question for you. Please repost other…

Q: Based on the information gathered from the periodic table seen in Figure 2-H, Magnesium will most…

A: 1) magnesium has an atomic number of 12 which means that it has 12 electrons and 2 electrons in the…

Q: What is the mass of magnesium fluoride that contains 7.29 × 1024 F atoms?   Relative atomic…

A: Given,  The mass of magnesium fluoride that contains 7.29 × 1024 F atoms is:

Q: Chemists generally use the term atomic weight rather than average atomic mass. We state in the text…

A: 1. Atomic mass indicates mass of an atom. Single atom has set of protons , neutrons and electrons.…

Q: 1. The diameter of a neutral Helium atom is about 1 x 102 pm. Suppose we could line up Helium atoms…

A:

Q: 13) Fill in the blanks to complete Table 2. (A = mass number) (4 points)W.A3W2MA TROH2 %3D oidesup…

A: In a neutral atom, the Number of electrons= No. of protons Atomic number (Z)= number of protons (p)…

Q: How many neutrons are in 37.0 ug ( ug= 10^-6 g) of 14 6 C?

A: Given :- mass of 6C14 is 37.0ug  1ug = 10-6 g  To be calculated :-  Total number of neutrons

Q: Silicon (average atomic mass=28.0855amu) has three isotopes. Their masses are 27.9769amu,…

A: Given mass of silicon isotope = 28.0855 amu % abundance of highest isotope i.e  29.9738 amu = 2.96 %…

Q: 13) A 44.8 g rhodium sample contains how many rhodium atoms? B) 2.74 x 105 atoms A) 2.62 x 1023…

A:

Q: 1. A solid circular cone made of pure platinum (d = 21.45 g/cm3 ) has a diameter  of 2.75 cm and…

A:

Q: 107Ag Two naturally occurring isotopes of silver are (relative abundance 52.00%) and 109Ag (relative…

A: Isotopes are those atoms of an element that have same atomic number but different mass number.  Mass…

Q: 14. Selenium-75 is used in the diagnosis of disorders related to the pancreas . How many (a) protons…

A: In a neutral atom the number of electrons and protons are same.

Q: Element Protons Neutrons Mass (atom) Carbon #protons? 12 Beryllium 4 #neutrons? element? 10…

A: For an element, the atomic number, Z, of an element is equal to the number of protons. The atomic…

Q: Natural rubidium has the average mass of 85.4678 u and is composed of isotopes85 Rb (mass = 84.9117…

A: Mass of the Rb = 86.913 amu. Given data: 85.4678 amu is average mass of the Rb Mass of 85Rb =…

Q: Bromine has two isotopes, Brand Br, whose abundances are (50.69% and 49.31%). Calculate the average…

A: MBr-79 is the molar mass of bromine-79 = 78.9183 u MBr-81 is the molar mass of bromine-81 = 80.9163…

Q: Did you ever want to know what you're made of? The table below shows the elemental break down of the…

A:

Q: 01. Suppose you have atoms A and B. Which of the following is not true? A. All matter is composed of…

A: 1)  A) True . all matter is composed of small particles called atoms . B) false . Nuclear…

Q: The ratio of sulfur to oxygen by mass in SO2 is 1.0:1.0.a. Find the ratio of sulfur to oxygen by…

A: Molar mass of sulphur = 32 g/mol Molar mass of Oxygen = 32 g/mol

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.