A modern penny weighs 2.5g but is only 2.52% copper by mass. Calculate the number of Cooper atoms in a penny?

Q: Consider Titanium. It is a metal with the same strength as steel, but it is 45% lighter. It is also…

A: The molar mass of titanium is 47.867g/mol Thus, the mass of 1 mol of titanium is 47.867g

Q: The element stramonium (Sa, average atomic mass 628.23 u) reacts with the element kingsine (Ks,…

A:

Q: Calculate the mass percent of chlorine in CCl6

A: Mass percent is a percentage of amount of an atom in the given molecule.  The mass percent of…

Q: What pattern exists between an atom's mass and its vertical position in the periodic table? What…

A:

Q: Help me with understanding how to calulate mass for A1 and A2

A: Molarity = mole of solute(mol)volume of solution (L)Mass of compound = moles × molar mass1mL =…

Q: Atomic mass of aluminum is 27. Accordingly, which of the following statements is wrong? O A) The…

A: Molar mass of Al is 27 g  1 gram atom of Al is 27 g  Mass of Al is 27/12 times of the C  Atomic mass…

Q: How can you efficiently determine the number of atomsin a sample of an element? Why is counting them…

A: To find: How can you efficiently determine the number of atoms in a sample of an element? Why is…

Q: Calcium Chloride Element #1 Element #2

A:

Q: Use an example to explain why we say that an atom is thesmallest unit of a substance

A: Atom It is smallest particle unit of matter that retains all chemical properties of the element. It…

Q: Gold (Au) is one of a group of metals calledthe coinage metals (copper, silver, and gold). How many…

A: Solution :      Avogadro's number is defined as the number of particles present in one mole of the…

Q: If a penny is made of 3.11 grams of copper, how many atoms of copper are in the penny? Show your…

A: Molar mass of Copper(Cu) is 63.546 g/mol

Q: Why is the mass of a mole of carbon atoms 12 times that of a mole of hydrogen atoms?

A: The solution is as follows:

Q: The radius of a tungsten atom is 137 pm. How many tungsten atoms would have to be laid side by side…

A: According to the unit conversion, 1 mm is equal to 1×109 pm. The diameter of tungsten is 274 pm.…

Q: has a molecular formula of C12H2403. What is the empirical formula of d?

A: Answer:  Molecular formula : the actual  whole number of elements in that compound.   Molecular…

Q: A common Aluminium foil for household use is nearly pure aluminium. A box of this product at a local…

A: Given width of aluminium foil is 306 nm. Length of the aluminium foil is 23.3 mm Thickness of the…

Q: Calculate the average atomic mass of Amazium, a newly discovered element (Amazium, symbol Az) which…

A: Given :- There are only 2 naturally occurring isotopes of Amazium. Mass of isotope Az-230 = 229.995…

Q: In your own words explain of what are atoms composed?

A: Given: To explain what atoms are composed of.

Q: Calculate (a) the number of atoms in 1.05 × 10−6 mole of helium and (b) the number of moles of…

A: a.

Q: O3

A:

Q: What

A: The atomic mass of Al is 26.98, so 1 mol of Al atoms has a mass of 26.98 g.

Q: 1 mol of Na atoms has more atoms than 1 mol ofH atoms. OTrue False

A: Mole is a concentration term used to express the amount of a substance like we use dozen.  1 dozen =…

Q: Calculate the number of atoms in sample. 12.899 g Pt

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: Sketch a simple schematic diagram of a mass spectrometer. Briefly explain how mass spectrometers…

A:

Q: Calculate the atomic mass of naturally occurring chlorine if 77.62% of chlorine atoms are…

A: To calculate atomic mass of chlorine:

Q: In a neutral atom the number of protons equals

A:

Q: How many silver atoms are there in 3.72 g of silver? Express your answer using three significant…

A:

Q: The total number of atoms in one mole of caffeine. Remember that the formula of caffeine is:…

A:

Q: How many moles of aluminum are required to c

A:

Q: Sulfur’s average atomic mass is close to the wholenumber 32. Chlorine’s average atomic mass is…

A: Given information,     Sulfur’s average atomic mass is close to the whole number 32.     The…

Q: A 1.45 g sample of chromium contains ____ atoms.

A: The concentration of any substance can be expressed in different ways such as molality, molarity,…

Q: Element Kittypurrium (named after one of TA's cats) has two isotopes: Isotope 1 has an atomic…

A: Percent of isotop 1 = 91.162%   Atomic weight of isotop 1 = 40.005 g/mol  Percent of isotop 2 =…

Q: A given sample of xenon fluoride contains molecules of a single type XeFn, where n is some whole…

A:

Q: Suppose that a person counts out gold atoms at the rate of one each second for the entire span of an…

A:

Q: Zinc chloride Element #1 Element #2

A: Given, Zinc Chloride (ZnCl2)  Molar mass of Zn = 65.38 g/mol  Molar mass of Cl = 35.453 g/mol  Molar…

Q: An unknown element (Uk) has three isotopes, seen in the table. One of the percentage values is…

A:

Q: Fusion is cool, small things come together and make bigger things. For example, if two carbon-12's…

A: Atomic No. of carbon is :- 6 Mass of C-12 carbon is :- 12 Atomic no. Silicone is :- 14 Mass  of…

Q: How many atoms of He can a balloon that has a 15 cm diameter hold? The density of Helium is 1.18…

A:

Q: For your research project, you need to use isotopic labels. For this you buy chlorine gas (Cl2) that…

A: The basic constituent of a substance is known as an atom that has a nucleus consisting of protons…

Q: 11) Calculate the number of atoms of each element: 5Na,SO,

A: according to mole concept one mole of any species contains avagadro number of atoms,  molecule and…

Q: Calculate the number of atoms in sample. 0.082 g Sr

A: given sample is 0.082 g of Sr we know 1 mol has 6.022 × 1023 atoms

Q: The molar masses of the four natural isotopes of chromium are 50 g mol-1, 52 g mol -1 53 g mol -1…

A: Given: The molar mass of four isotopes of chromium is 50 g/mol, 52 g/mol, 53 g/mol, and 54 g/mol.…

Q: In one experiment you reacted 45.7g of Aluminum with 182.8g of Iron (III) oxide to produce Aluminum…

A: GivenAluminium reacts with Ferric oxide to produce Aluminium oxide and ironThe mass of aluminium=…

Q: 16. While cleaning your attic, you find your old mass of 11.3 collection? and the rest of mass of 82…

A:

Q: What is the representative particle, mass(g), no. of particles of carbon dioxide

A: 1mole of any substance contains 6.023*1023 molecules or particles, it is also called one avagadros…

Q: The density of helium in a ballon is 1.18g/L. If a balloon holds 2.81L of He, how many atoms of He…

A: Given : density of helium = 1.18 g/L volume of helium = 2.81 L

Q: How many copper atoms are in a pure copper statue with a mass of 105kg?

A: The value is given as follows:

Q: Question attached

A: 1 Mole of Antimony contains number of atoms equal to Avogadro's number, i.e., 6.023*1023.

Q: which contains more atoms, 1 gram on gold or 1 gram of silver? explain please

A: 1mol of any substance contains 6.023 × 1023  number of atoms. 1mol of any substance means its atomic…