A pure copper cube has an edge length of 2.76 cm How many copper atoms does it contain? (volume of a cube = (edge length)33; density of copper = 8.96 g/cm3g/cm3)

Q: Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48…

A: Given: Percentage of zinc by mass= 37.0% density of zinc= 8.48 g/cm3 Total volume of the fitting=…

Q: One atom of lithium, Li, reacts with fluorine, F, to produce lithium fluoride, LiF2. The atomic mass…

A: Which statement about the reaction is correct?

Q: A pure titanium cube has an edge length of 2.78 in. How many titanium atoms does it contain?…

A: Edge length = 2.78 inch, 1 inch = 2.54 cm 2.78 inch = 2.54 × 2.78 = 7.061 cm Density of unit cell =…

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: The mass of a single platinum atom is 3.24×10-22 grams. How many platinum atoms would there be in…

A: The mass of an atom is the amount of matter present in the substance. The mass of an atom remains…

Q: Assume the atomic mass of element X is 22.99 amu. A 22.42−g sample of X combines with 123.73 g of…

A: Mass of X = 22.42 g Mass of Y =123.73 g Atomic mass of element X = 22.99 amu Atomic mass of element…

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

A:

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 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: How many copper atoms are in a cube of copper metal measuring 1.15 cm on each edge? The density of…

A: Given, edge length = 1.15 cm            density of copper = 8.96 g/cm3 Now, volume of cube of copper…

Q: Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48…

A: Here we have:Volume of common brass = 115.0 cm3Density of common brass = 8.48 g/cm3As we know:

Q: A cube of solid aluminum has a volume of 8.87×103 cm3 and a density of 2.6989g/cm3. However, the…

A: Initial volume V1 = 8.87 x 103 cm3.Density, d = 2.6989 g/cm3.Initial mass, m1 = V1 x d = (8.87 x 103…

Q: A typical silicon chip has a mass of 2.3 x 10-4 g. Assuming the chip is pure silicon, how many…

A: Given that the mass of silicon chip is 2.3×10-4 g. The number of moles can be calculated using the…

Q: If the density of lead is 11.34 g / a.m., how many atoms are there in a piece of lead 2.5 cm wide,…

A: To calculate the number of atoms in the sample, we must have the number of moles of the substance.…

Q: A student has a sample of zinc that weighs 22.19 g. How many zinc atoms are in this amount of zinc?…

A: The Number of atom present in one mole of an element is equal to the Avogadro's number (6.022×1023…

Q: How many hydrogen atoms are there in 8.75 g of C,H,NO,? Select one: a. 23 4.79x 10 b. 3.22x 1023 с.…

A: Given: Mass of C2H7NO2 = 8.75 g Molar mass of C2H7NO2 = 77.08 g/mol

Q: [The volume of a sphere is (4/3)πr3 and the density of copper is 8.96 g/cm3.] A pure copper sphere…

A: Number of atoms in a mole of any substance is equal to Avogadro's number.

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

A: Density of an element is defined as the ratio of the mass of the element to its volume.…

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: Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48…

A:

Q: Boron and sulfur form two binary compounds. The first contains 0.2247 g B/1.000 g S, and the second…

A:

Q: A pure titanium cube has an edge length of 2.78 in. How many titanium atoms does it contain?…

A: Given information: Edge length of the cube = 2.78 in Density of titanium = 4.50 g/cm3

Q: How many copper atoms are present in a 2017 penny with mass 3.10 g? Modern pennies are 97.5% Zn and…

A: we have a penny of mass 3.10 gram. and it's also mentioned that in  a modern penny the percentage of…

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: Which of the following contains the most atoms? 24.305g Mg 39.098g K 9.0122g Be 21.62g B

A: One mole of a substance contains 6.022×1023 atoms and the number of moles of a substance can be…

Q: Aluminum bronze is a mixture of 92.0% copper (Cu) and 8.0% aluminum (Al) by mass. What percent of…

A: Given : Mass percent of Al = 8.0 % And mass percent of Cu = 92.0 % Assuming 100 g of mixture. Hence…

Q: A pure copper sphere has a radius of 0.935 in. How many copper atoms does it contain? [The volume of…

A: First convert the given radius in inch to cm. 1 inch = 2.54 cm, then

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

A:

Q: A pure copper sphere has a radius 0.927 in . How many copper atoms does it contain? [The volume of a…

A: The term density is defined as the ratio of mass and volume of the given substance. It can also be…

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: What is the mass of one atom of I? O 2.107 x 10 22 8. O 3.443 x 1023 O 4.745 x 10-22 g O 6.641x…

A: To find mass for one atom of an element, divide the atomic mass of an element by avogadro number. It…

Q: 9. How many hydrogen atoms are there in 500.0 L of water? (dH.0 = 1.00 g mL) %3D A: 3.34 x 1025 28

A: Given, the volume of water V =500.0 L =500000 mLdensity of water d =1.00 g .mL-1we are asked to…

Q: The density of liquid mercury is 13.69 g/cm. How many atoms of mercury are in a 1.614E1 mL sample?

A: density = massvolume mass = density × volume mass of liquid mercury = 13.69 g/cm3 ×1.614 ×101 mL =…

Q: The density of gold is 19.3 g/cm3, and the average mass for one gold atom is 3.27×10-22 g. Seven…

A: Given the density of gold, d = 19.3 g/cm3. 1 cm3 = 1 mL Hence density of gold, d = 19.3 g/mL…

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

A: Given : Density of silica = 2.20 g/cm3  And diameter of grain of sand = 0.455 mm

Q: Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48…

A:

Q: A 1.98 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 2.71 x 1022…

A:

Q: Since 1983, pennies have been made with zinc and plated with copper. Prior to 1983, pennies were…

A: Since from 1793-1837 pennies were made up of pure copper therefore, if you had a penny from 1800…

Q: Two pure samples of atoms, labeled A and B, contain titanium (Ti) atoms and carbon (C) atoms,…

A:

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: A pure copper sphere has a radius of 0.935 in. How many copper atoms does it contain? The volume of…

A: First convert the given radius in inch to cm. 1 inch = 2.54 cm, then Next determine the volume of…

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: If the density of lead is 11.34 g/cm³, how many atoms are there in a lead piece of 2.5 cm wide, 1.00…

A: Given data: The density of lead = 11.34 g/cm3. Width of lead piece = 2.5 cm. Length of the lead…

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.