3) A tiny speck (8.3 x 107 mol) of radioactive americium-241 is used in smoke detectors. How many atoms of americium-241 are there in one of these smoke detectors? A. 5.0 x 10¹7 B. 6.0 x 1023 C. 1.2 x 1020 D. 8.3 x 107 E. 2.9 x 1022

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

A: An atom is composed up of three subatomic particles  electrons, protons, and neutrons.

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: As in the equation below: 2HC aq) MgCl2(aq) + H2(a) -> The volume of hydrogen gas collected over…

A: It's a multiple question type.   Given information, 1) Temperature (T) = 45°C = 45 + 273.15 K =…

Q: The atomic number of the element neon (Ne) is 10. How many electrons does a neutral atom of neon…

A: Given, The atomic number of the element neon ( Ne ) is 10

Q: How many protons (P), neutrons (n) and electrons (e) are present in 18173Ta-3 ? a. 76 p 105 n 73 e…

A:

Q: What is the mass of each sample? a. 2.75 mol of Fe b. 0.115 mol Al c. 125 mol Si d. 1 Ni atom

A: MASS- Mass is basically defined the quantity of matter in the object. It is measured in grams and…

Q: ow many protons (P), neutrons (n) and electrons (e) are present in 18173Ta-3 ? a. 76 p 105 n 73 e b.…

A:

Q: 34. How many protons, electrons and net does Be have? beryllum 4 Ве 9.0122

A:

Q: 9. a. What is the atomic number of an element? b. What is the mass number of an isotope? c. In the…

A: Given question is related to defining atomic number, mass number of an element.

Q: A fictional element has 2 isotopes and an atomic mass of 67.18 amu. If the first isotope is 66 amu…

A: Average atomic mass can be determined by the equation given below:

Q: QUESTION 4 Carbon has six protons and six neutrons. Its mass number is 3. 0 6 O 12 O 36 -

A: Given that , No.  Of Protons = 6 No. Of Neutrons=6

Q: 5. has the same number of protons with number of neutrons c. acids b. isotopes d. hydrates

A: To solve this problem we have to know about isotopes.  Isotopes are the species of same element…

Q: The element X in a compound was involved in a chemical reaction. After the reaction was completed,…

A: Given: Element X undergoing a chemical reaction.

Q: 2. The isotope of iodine with a mass number 131 is often used in medicine as a radioactive tracer.…

A: We know that, Number of proton= Atomic number=no. of electron (when no any charge present) no. of…

Q: Which of the following samples of gases contains the greatest number of atoms? (Relative atomic…

A: 4th option is correct that is 13.0 g of C2H6

Q: Using the atomic symbol below, how many neutrons are in this isotope? 2357 92 iments

A: The number of neutrons is equal to the difference between the mass number of the atom (A) and the…

Q: Chlorine has two neutral stable isotopes; Chlorine-35 and Chlorine-37. How many electrons are in…

A: The atoms with the same number of protons but different numbers of neutrons or mass numbers are…

Q: What is the atomic mass of boron-12? A. 13.00335 amu B. 4.00260 amu C. 18.99840 amu D. --…

A: Since boron has atomic number = 5  Hence number of electrons in boron = 5 and to become neutral atom…

Q: Bromine (Br) has two isotopes, with masses of 78.92 and 80.92 amu. What is the natural abundance of…

A: given, the two isotopes of bromine with masses heavier isotope = 80.92 amu lighter isotope = 78.92…

Q: 15. How many subatomic particles are there in C-14  A. 6 B. 8 C. 14 D. 20

A: There are three subatomic particles present in any atom or element- protons, neutrons and electrons.…

Q: olecule in units

A: Dear student I have given answer to your question in the image format.

Q: Silicon has three isotopes: Silicon-28, Silicon-29, and Silicon-30. Which isotope is the most…

A: •So basically this question is based on mass of elements calculated from their isotopes and their…

Q: 15 Which best describes the atom: 26Fe A. 56 protons, 26 neutrons B. 26 protons, 30 neutrons C. 26…

A: Since you have asked a question with multiple sub-parts, as per our company guidelines we are…

Q: How many protons (P), neutrons (n) and electrons (e) are present in 18173Ta-3 ? a. 76 p 105 n 73 e…

A:

Q: How many grams of platinum (Pt) contain the same number of atoms as 5.0 g of lithium (Li)? О а. 0.18…

A: Given, Mass of lithium (Li) = 5.0 g Mass (in grams) of platinum (Pt) contain the same number of…

Q: How would you determine the accuracy of an atomic mass?

A: The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of…

Q: nitrogen-14 and nitrogen-15, different? A. Different number of neutrons B. Different protons and…

A: Isotopes are the elements of same atom which have number of protons and different number of Neutrons…

Q: . What is the mass, in grams, of each of the following? a. 2.3*10^-3 mol Sb b. 3.59*10^-2 mol Ba…

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

Q: How many oxygen atoms are there in 2.10 g of Al2(S208)3 (MW A12(S208)3 = 630.34 amu) %3D O a. 4.82 X…

A:

Q: 49. Identify the unknown particles (AZX) in the equations below. Show your work and mention the…

A:

Q: Calculate the number of protons, neutrons, and electrons in: a. Ba b. Po C. £Cd Calculate the number…

A:

Q: / protons

A: Since you have asked multiparts, we will solve the first three subparts for you. If you want any…

Q: Match terms with their definitions v Avogardo's number v Molar mass v mole v Atomic mass A. mass of…

A: The mole concept was proposed by Avogadro to specify the atoms, molecules, and ions concentration.…

Q: How many oxygen atoms are there in 3.15 g of Al2(S208)3 (MW A12(S208)3 = 630.34 amu) O a. 2.41 X…

A: Given that,  Amount of Al2(S2O8)3 = 3.15 g Molar mass of Al2(S2O8)3 = 630.34 amu Moles of Al2(S2O8)3…

Q: 1. HNO, H,S0, 2. C AC 3. H. PdC 4. Br Febr, 1. AICI, OCH, 9) OCH, 2. ZnHg), HCI 3. HH,0 1. AIC O h)…

A: The question is based on the concept of organic reactions. A reactant can be converted to a product…

Q: 22. What is the mass in grams of each of the following? a. 3.011 × 10²⁹ atoms F b. 1.50 x 1023 atoms…

A:

Q: 4. Who discovered the neutron in 1932? A. Democritus C. Ernest Rutherford B. James Chadwick D.…

A: Mass number Mass number gives the number of protons and neutrons in an atom.

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

A:

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: 7. Place the labels chemical symbols, atomic number, and mass number in the shorthand notation…

A: -> The number at down side in symbol is always atomic number . -> The number at upper side in…

Q: A magnesium ion (Mg2*) has electrons. a. 9 b. 10 С. 12 d. 13

A: The number of electrons on a neutral atom can be determined as follows: The number of electrons on…

Q: 15. How many atoms are in a sample of 10.0 grams of silver? a. b. 5.58 x 1022 atoms 3.06 x 1022…

A: mole is equal to weight of substance divide by it's molar mass

Q: How many protons, neutrons, and electrons are in 138Ba ?   a. 56  P, 56 E, 82 N           b. 57  P,…

A: Number of protons, electrons and neutrons can be calculated by using atomic number and mass number.

Q: 5. Find the mass in grams of each of the following. a) 1 gold atom b) 6.02 X 1023 He atoms

A:

Q: How many atoms does oxygen have in one mole of oxygen? 6.6 6.02E-23 3.14E-23 2.2

A: How many atoms  are present in one mole of oxygen  Solution is given below in next step

Q: An aluminum nail has an excess charge of +3.2 µC.  How many electrons must be added to the nail to…

A: Quantization of charge is defined as charge carried by an object is an integral multiple of the…

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.