Bronze medals are made from an alloy composed of 93.8% copper, 5.1% tin, and 1.1% zinc (measured by mass). What percentage of the atoms in this alloy are tin atoms?

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: The diameter of a silicon atom is 2.34 x 10-8 cm. If the silicon atoms were placed next to each…

A: Given:  Diameter of silicon = 2.34 x 10-8 cm Width of paper = 8.5 inch

Q: The number of atoms in 1 dm3 of aluminum is nearly the same as the number of atoms in 1 dm3 of lead,…

A: Density of a substance is given by the ratio of mass and volume of the substance. Write the…

Q: The U.S. Environmental Protection Agency (EPA) sets limits on healthful levels of air pollutants.…

A: The number of lead atoms can be calculated as follows:

Q: How many silicon atoms are there in 1.00g of silicon?

A: Given: Mass of silicon=1.00 g Mass of 1 mole of silicon=28.0855  g

Q: What is the amount, in moles, of each elemental sample? 0.211 g Li

A:

Q: What is the mass of 5.10*10^21 platinum atoms?

A: A mole represents 6.022x1023 particlesThe 6.022x1023 Number is also known as Avogdro's Number .It…

Q: How many atoms are contained in a titanium sphere having a diameter of 4.00 mm? The density of…

A: Given : density of titanium = 4.506 g/cm3  And diameter of sphere = 4.00 mm  Since 1 cm = 10 mm…

Q: How many atoms of Cu are existing in 2.36 g of copper wire?

A: Since molar mass of Cu = 63.546 g/mol Mass of Cu = 2.36 g (given)

Q: What is the amount, in moles, of each elemental sample? 3.55 g Zn

A: The amount in moles of Zn are to be calculated. Given: Mass of Zn = 3.55 g The relation between mass…

Q: The mass of an atom of hydrogen is 1.673 x 10-24 g. How many atoms are in a 10.5 g sample of…

A: Given, Mass of a hydrogen atom = 1.673*10-24 g. Mass of sample = 10.5g.

Q: What is the mass of 4.97×1021 platinum atoms?

A: Mass has many units. Its SI unit is Kg. On atomic level, atomic mass unit, molar mass, molecular…

Q: If a sample of lithium contains 2.50x10* atoms of lithium-7 and 2.00×10 atoms of lithium-6, what is…

A: Given sample contains  Li-7=2.5×104 atomsLi-6=2×103 atoms

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: A 20.0 g sample of an element contains 3.89 x 1023 atoms.

A: Given:-  Number of atoms = 3.89 × 1023atoms Mass of sample = 20.0g

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: How many copper atoms are in a cube of copper metal measuring 1.33 cm on each edge? The density of…

A: Volume of copper cube = 1.33 cm x 1.33 cm x 1.33 cm                                            =…

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: 2. How many Sulfur atoms would be present in 32.5 moles of Sulfur?

A: Here,  Questions given moles and apply the value of Na , calculate the no of atom Na value is…

Q: White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm³. How many…

A:

Q: In the summer of 2010, platinum (195.078 g/mol) sold for $1,500/oz. One ounce is equal to 28.35 g.…

A: Given: Molar mass of platinum = 195.078 g/mol Cost of platinum            = $1500/oz One ounce…

Q: Determine the number of atoms that would make up a 78.8 g sample of Tellurium.

A:

Q: Calculate the number of atoms in sample. 1.87 g Bi

A: Calculate the number of moles of Bi Number of moles of Bi = Given mass of BiMolar mass of Bi= 1.87…

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: How many atoms are contained in a block of aluminum metal measuring 8.0 mm x 6.0 mm x 15 mm? The…

A: Given, length of aluminum block = 8.0 mm = 0.8 cm                            ( since 1 mm = 0.1 cm)…

Q: the history of the discovery of hydrogen and what properties they observed to identify it

A: Position of hydrogen in periodic table:   Hydrogen is regarded as rogue / disputable element because…

Q: Find the atomic mass unit of silicon -28,silicon-29,silicon-30 with masses of…

A:

Q: The mass of an atom of hydrogen is 1.673 x 10-24 g. How many atoms are in a 10.8 g sample of…

A: Since mass of 1 H atom = 1.673 x 10-24 g Hence assuming in 10.8 g sample of hydrogen we have n…

Q: White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm3. How many…

A:

Q: A single atom of element Q has a mass of 1.09 x 10 -22 g. What is the name of the element Q?

A: Given : Mass of single atom of element = 1.09 X 10-22 g Assuming atomic mass of element is M.

Q: The average atomic mass of carbon is 12.011 amu. Assuming you were able to pick up only one carbon…

A: Given that, the average mass of carbon is 12.011 a.m.u. The given mass of any of the carbon isotopes…

Q: How many helium atoms are there in a helium balloon containing (1.8x10^0) kg of helium?

A: Given :- mass of He = 1.8 × 100 kg  To calculate :- number of atoms of He  number of moles =…

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

A:

Q: What is the edge length (in cm) of a titanium cube that contains 2.55 * 10(24) titanium atoms? The…

A:

Q: If the density of indium is 7.31 g/cm², how many atoms are there in a indium piece of 30 dm wide, 5…

A:

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: 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 mass ratio of sodium to fluorine in sodium fluoride is 1.21:1. A sample of sodium fluoride…

A: The amount of sodium produced on decomposition of sample NaF is 28.8g. The mass ratio of sodium to…

Q: A cylindrical piece of pure titanium (Ti, density=4.506 g/cm^3) has diameter d=1.15 cm and length…

A:

Q: Hydrogen sulfide is composed of two elements: hydrogen and sulfur. In an experiment, 6.500 g of…

A: a)The mass of sulfur obtained is calculated as shown below,

Q: White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm3. How many…

A: The question is based on mole concept. We have been given diameter of the silicon atom. we have to…

Q: The U. S. Environmental Protection Agency (EPA) sets limits on healthful levels of air pollutants.…

A: The U. S. Environmental Protection Agency (EPA) sets limits on healthful levels of air pollutants…

Q: 1. Given the data in table shown below, calculate the atomic mass of unknown element X. Then,…

A: The average atomic mass of element is equal to the product of the masses of the isotope and its…

Q: How many atoms are in the sugar in this cup?

A: Given :- mass of sucrose = 180 g  To calculate :- number of atoms in sucrose

Q: How many grams of lithium are in 8.52 x 1023 atoms?

A: 1 mole of any species contains Avogadro's number of atoms or molecules. i.e, 6.023 × 1023  Molar…

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

A:

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.