In the world of electronics and semi-conductors it is vitally important to use the correct weights of materials. To do that, the correct atomic weight must be determined to five significant figures. For silicon, there are three major isotopes:  What is the correct atomic weight of silicon to five significant figures?

Q: Naturally occurring silver (Ag) consists of two isotopes. One of the isotopes has a mass of 106.91…

A: Mass of one Isotope of Ag = 106.91 amu  Percentage of one Isotope of Ag = 51.87

Q: the element silver has two naturally occurring isotopes. the mass of one isotope is 106.905 u and…

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Q: 2. Silver has an average atomic mass of 107.87 amu and has 2 isotopes. *Ag has a mass of 106.95 amu…

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Q: On earth, tin has 10 different stable isotopes. The heaviest, 124Sn makes up 5.80% of naturally…

A: Grams of 124Sn present in 38.3 g sample     = 38.3*(5.80/100)= 2.22 g

Q: Naturally occurring chlorine (Cl) consists of two isotopes. One of the isotopes has a mass of 34.969…

A: Isotopes have same atomic number but different atomic mass or mass number. Atomic number is equal to…

Q: What is the radius (in cm) of a pure copper sphere that contains 1.14 * 1024 copper atoms? [The…

A: Given information:

Q: There are two naturally occurring isotopes of chlorine. 35 Cl has a mass of 34.9689 u. 37 Cl has a…

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Q: hydrogen phosphide can be decomposed to give phosphorus and hydrogen in a mass ratio of 10.32:1.00.…

A: the molecular formula of this substance is PH3 and the name of this compound will be phosphine.

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

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Q: Silicon has three naturally occurring isotopes (Si-28, Si-29, and Si-30). Masses and natural…

A: From the values given in the table we will first calculate the abundance if Si-30 as shown in the…

Q: Potassium has 2 stable isotopes, 39K and 41K with atomic mass of 38.9637 amu and 40.9618 amu. If the…

A: Given: The average mass of potassium = 39.10 u The atomic mass of 39K = 38.9637 u The atomic mass…

Q: Calculate the weighted average of a substance from space. It has an abundance of 30.0% and 70.0% for…

A: The relative abundance definition in chemistry is the percentage of a particular isotope that occurs…

Q: 2. Bromine has two naturally occurring isotopes (Br-79 and Br-81) If the natural abundance of Br-79…

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Q: Calculate the relative abudance of the two europium isotopes.

A: According to the question Eu-151 has mass 150.916 amu and Eu-153 has mass 152.9209.  The average…

Q: A sample of atoms has an average atomic mass of 188.2 amu. If this sample consists of two naturally…

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Q: How many electrons make up a charge of 56nC? If these are made of copper atoms, how many atoms would…

A: The charge is always quantized. The number of electrons can be determined as follows: Number of…

Q: 2. Atoms, Molecules and lons: Nuclear Arithmetic This puzzle focuses on the types and ambers of…

A: Information about the question

Q: Chlorine has two naturally occurring isotopes, 35Cl and 37Cl. What is the mass number of each…

A: To find: The mass number of each isotope. Number of protons, neutrons and electrons are present in…

Q: You are given 1.0g samples of Iron, Silicon, and Lithium. Which of the three samples will contain…

A: Given: 1 g sample of Iron, silicon and lithium To find: Sample containing largest number of atoms…

Q: 2) Uranium is used in nuclear reactors and is a rare element on earth. Uranium has three common…

A: Step 1: Step 2: Step 3: Step 4:

Q: Q1* Rubidium has two naturally occurring isotopes, rubidium-85 (atomic mass=84.9118 amu;…

A: We have given the masses and isotopic abundance of three isotopes of rubidium. Isotopes of an…

Q: Bromine has two naturally occurring isotopes (Br-79 and Br-81) If the natural abundance of Br-79 is…

A: Given: There are two naturally occurring isotopes of Br. The abundance of isotope 1 = 50.69 % Mass…

Q: Thallium (Tl) has two naturally occurring isotopes: Tl-203 (29.52 % ; mass = 202.972 amu ), and…

A: Average Atomic Mass of an atom can be calculated by using following formula -   Average atomic mass=…

Q: Copper, which has an average atomic mass of 63.546 amu, has two stable isotopes: copper-63 and…

A: Given,Atomic mass of Copper-63 = 63.546 amuAbundance of Copper-63= 69.15%

Q: Chorine has 2 isotopes, 35Cl and 37Cl. A fellow student calculated the natural abundances of each…

A: Answer - According to the question - Given values are - Chorine has 2 isotopes,1 = 35Cl…

Q: An unknown element X has the following isotopes: 1ºX (20.00% abundant, atomic mass = atomic mass =…

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Q: The average atomic mass of Y is 54.6 . one isotop has an atomic mass of 53 and the other isotop has…

A: •Given:- Average atomic mass of Y =54.6 Isotope 1 mass (m1)= 53 Assume isotope 1 abundance(x1) is…

Q: Copper has two naturally occurring isotopes, 63 Cu(62.9396amu)and 65 Cu(64.9278amu). If copper has…

A: %abundance of cu63= |63.546-64.9278|÷|64.9278-62.9396| So solve it  and  27% Cu63 Same for CU65= 73%…

Q: An unknown element X has the following isotopes: ²⁵X (80.50% abundant, mass = 25.03 amu) and ²⁷X…

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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: Suppose that a hypothetical element con- sists of a mixture of two isotopes. One iso- tope, having…

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Q: A newly discovered element consists of 2 isotopes, one with a mass of 11.34 amu and a relative…

A: Mass of one of the isotope newly discovered element =11.34 amu  Relative abundance= 17.2 %  Mass of…

Q: atomic mass of this factious element.

A: Atomic mass of of one isotope(M1) =56.44 % Abundance (X1) = 42.5 % Atomic mass of 2nd isotope(M2) =…

Q: 6) Copper used in electric wires comes in two flavors (isotopes): "Cu and "Cu. "Cu has an atomic…

A: Average atomic mass of an atom can be calculated asAAM=100ma​×abundancea​+mb​×abundanceb​+....​ We…

Q: Consider an element Z that has two naturally occurring isotopes with the following percent…

A: average atomic mass= ∑%abundant×Molar mass/100 using this we can calculate the average atomic mass…

Q: A made up element ey has three natural isotopes. The isotopes each have an atomic mass of 33.02…

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Q: 1. What is an isotope? 2. What does the number next to isotopes signify? 3. How can you tell…

A: All the physical and chemical properties of a an element depends on its atomic number , the total…

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.