A common Aluminium foil for household use is nearly pure aluminium. A box of this product at a local supermarket is advertising has 306 nm wide and 23.3 mm long with a thickness of 10.16 X 10^-6 m. Find out the total number of atoms in the aluminium foil.

Q: The diameter of a US penny is 19 mm. The diameter of a silver atom, by comparison, is only 2.88 Å.…

A: The diameter of one silver atom in the units of mm is calculated as follows:

Q: When you comb your hair on a dry day, your hair sticks to the comb. How could you explain this…

A: Static Electricity is a static or stationary charge produced by friction. It is created when the…

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

A: Given information:

Q: Distinguish between molecular substances and ionic substances in terms of their composition?

A: Ionic compounds have strong ionic bonds while molecular substances have covalent bonds. Molecular…

Q: Consider the following hypothetical atoms: 130 64 1X has 62 electrons and 1Y has 78 electrons.…

A:

Q: 11. A monoatomic anion with two charges contains 36 electrons. It is statements is false? А. Kr В.…

A: We have to consider an anion. Now going to the question A. is neutral atom…

Q: X is an element with 3 isotopes, X-139, X-140 and X-141. The relative abundance of each isotope is…

A: If A1 , A2 and A3 are mass numbers of three isotopes of an element with relative abundance X1 , X2…

Q: Write the formula of the ionic compound expected to form from the following elements: (Be sure to…

A: We know that,  AxBy will  be ionise to form ions as zhown in the image as-

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: 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: elements are made up of one type of atom and compounds are made up of multiple atoms bonded…

A: According to the definition, a molecule is made up of multiple atoms bonded together. If a molecule…

Q: Samples of compound X, Y, and Z are analyzed, with results shown below. Compound X Description…

A: Law of multiple proportions: It states that when two elements combine with each other to form more…

Q: 1. What are the differences and similarities between an ionic compound and a molecule? Include…

A: (1) There are following differences between ionic compounds and Molecule -  Ionic compounds…

Q: how many gold atoms are in a 13.5g sample of gold? the density of gold is 19.3g/cm3

A: Total moles present of a sample = Given weight Atomic weightTotal atom present in a sample = Total…

Q: Suppose the diameter of a type of atom is 2.22 x 10-7 mm. A coin has diameter 1.20 cm. Suppose the…

A: If we divide the diameter of a coin by the diameter of an atom we will get the no. of atoms.  Given…

Q: Write    the    correct    formula    for    the    compound    corresponding    to    each    of…

A:

Q: Using triangles to represent one type of atom and circles to represent another type of atom, draw…

A: Given: Using triangles to represent one type of atom and circles to represent another type of atom,…

Q: A pure copper sphere has a radius 0.944 in. How many copper atoms does it contain? [The volume of a…

A:

Q: An alloy is 12.8% copper by mass in tin. Copper makes up what percentage of the atoms in this sample

A:

Q: Use triangles to represent atoms of element A and circles to represent atoms of element B. Draw an…

A:

Q: Is the statement inconsistent with Dalton’s atomic theory as it was originally stated? Why? The…

A: Yes,the statement that formation of a compound often involves the destruction of of one or more…

Q: Differentiate between an atom, an element, and a molecule.

A: Element - are naturally occurring species  Atom-building block of molecule  Molecule - made up of…

Q: An atom has an average atomic mass of about 24.3 amu. What is the chemical symbol for the atom? Use…

A: Atomic mass is the mass of an atom. SI unit of mass is the kg. Atomic mass is often expressed in the…

Q: Page |99 SUBATOMIC PARTICLES AND ISOTOPES Complete Symbol Atomic Mass Number of Number of Number of…

A:

Q: Samples of compound X, Y, and Z are analyzed, with results shown here. Do these data provide…

A: Law of definite proportion: In any chemical compound the component elements are in fixed ratio by…

Q: What are the atomic models, explain the most modern one

A:

Q: A pure titanium cube has an edge length of 2.76 in. How many titanium atoms does it contain?…

A: Here, we have to calculate number of titanium atoms.

Q: How many atoms are contained in a block of aluminum metal measuring 4.0 mm x 9.0 mm x 11 mm? The…

A:

Q: A pure copper cube has an edge length of 2.76 cm How many copper atoms does it contain? (volume of…

A: Density of a unit cell is given by, Density = Z×Ma3×NA where, Z is the number of atoms in the unit…

Q: 22. As in question 21 determine the mass % of N (nitrogen atoms) in ammonia (NH3), urea (CHẠN2O) and…

A: Mass percent is the mass of the element divided by the mass of the compound or solute.

Q: The formula of europium oxide is EuzOs. Based on this information, what is the formula of the…

A: Atom combines in a simple ratio to form molecules of a specific compound.      In Eu2O3 valency of…

Q: Write the formulas for the following compounds:(a) phosphorus pentachloride(b) dinitrogen…

A: The chemical formula of the given name represents the symbolic representation of the formula. LIke:…

Q: How many gold atoms are in a 0.277 ounce, 18 K gold bracelet?(18 K gold is 75% gold by mass)

A: The number of gold atoms in 0.277 ounce, 18K gold bracelet are to be calculated, where 18K gold is…

Q: Describe the structure of an atom. What are atoms composed of and how are the individual parts of an…

A: Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: A bicycle part made of titanium, Ti, has a volume of 32 cm . Titanium has a density of 4.50 g/cm .…

A:

Q: The isotope of an unknown element, X, has a mass number of 79. The most stable ion of the isotope…

A: Mass number of an isotope represents the sum of protons and neutrons in its nucleus. In an atom,…

Q: What is the difference between molecules and compounds? Give examples of each.

A:

Q: For questions 57 thru 60, think about how these atoms would actually exist in nature in their most…

A: Given, bromine (Br) ______ 58. tellurium (Te) ______ 59. potassium (K) _____        60. lithium…

Q: 1 Empirical Formula 2 Mass Percent 3 Percent Composition 4 Anhydrous Compound A compound with a…

A: The empirical formula of a compound does not give the definite proportions of the element in a…

Q: Palladium forms three different compounds with sulfur. The mass of sulfur per gram of palladium in…

A:

Q: Use what you have just learned about chemical formulas to identify the following as element (atomic…

A: The atoms , molecules, compounds and mixtures are as follows.

Q: . What are the three types of subatomic particles? Give their names, charges and location in the…

A:

Q: if a gold atom has a radius of 145 pm and you could string gold atoms like beads on a thread, how…

A:

Q: How many atoms are contained in a titanium sphere having a diameter of 12.0 mm? The density of…

A:

Q: Which element is represented by the following symbol A. Chromium B. germanium C. barium D. iron

A: The given symbol of element is                       5624X  Here,  Mass number of element = 56…

Q: Atom/ion Hydrogen atom (H) Oxide ion (0²-) Hydrogen ion (H+) Nitrogen atom (N) Nitride ion (N³-)…

A: The number of proton is equal to the atomic number of that element.  The no of proton is same as no…

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.