The diameter of a silicon atom is 2.34 x 10-8 cm. If the silicon atoms were placed next to each other in a straight line across and 8.5-inch width piece of paper, how many silicon atoms would be there?

Q: Assuming that the shape of atoms is spherical, what is the diameter (in angstroms) of an atom that…

A: A multiple choice question based on atomic structure, which is to be accomplished.

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 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: Write the chemical formula for the following compounds. a. barium nitrate b. strontium chlorate…

A: [a.] Ba(NO3)2 [b.] Sr(ClO3)2 [c.] (NH4)3PO4 [d.] CoS [e.] HgI2 [f.] CuCN

Q: Writing the formulas for the resulting compounds   silicate  selenide  hydrogen sulfate  Iron (iii)…

A: To solve this problem we have to write the formula of the given compound .   We know that the…

Q: Calculate the mass, in grams, of each sample. a. 1.1 x 10 gold atoms b. 2.82 x 102 helium atoms c.…

A: Calculate the mass in grams of each sample  (a) 1.1 x 1023 gold atoms (b) 2.82 x 1023  helium atoms…

Q: What is the mass percentage of phosphorus in a sample of 8.53 phosphorus oxychloride containing a…

A: Mass percentage of phosphorus = 20.16 %

Q: The radius of a strontium atom is 215 pm. How many strontium atoms would have to be laid side by…

A: Diameter = 2 X Radius

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: What is the radius (in cm) of a pure copper sphere that contains 1.27*1-^24 copper atoms?  The…

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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: atoms

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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

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Q: The radius of a tantalum atom is 142 pm. How many tantalum atoms would have to be laid side by side…

A: Given: Radius of tantalum atom = 142 pm And total distance given = 2.85 mm.

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 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: 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: 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 radius of an atom of gold (Au) is about 1.35 Å. (a) Express this distance in nanometers (nm) and…

A: It is given that :Radius of gold atom = 1.35 Å

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

A:

Q: The diameter of a U.S. dime is 17.9 mm, and the diameter of a silver atom is 2.88 A° . How many…

A: The diameter of a U.S. dime is 17.9 mm = 0.0179  meter  diameter of a silver atom is 2.88 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: The radius of a rhodium atom is 134 pm. How many rhodium atoms would have to be laid side by side to…

A: We have to calculate the number of rhodium 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…

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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: A platinum atom has a radius of 177 pm. If you could string platinum atoms like beads on a thread,…

A: Given that, Radius of Pt-atom = 177 pm =177×10-12 m= 177×10-10 cm =1.77×10-8 cm Length of necklace =…

Q: Calculate the mass, in kg, of sample.  5.48x10^29 lithium atoms

A: Molar mass of lithium is 6.94 g/mol 6.023 x 1023 atoms have mass = 6.94 g of lithium

Q: How many Si atoms are there in a 63.4 gram sample of elemental Si? atoms

A: Given the mass of the Si sample = 63.4 g  We have to find the number of Si atoms.  We can proceed…

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 nanotechnology experiment requires 3.60x 1019 atoms of potassium. What is the mass of this sample?…

A: Given  number of atoms of potassium = 3.60 x 1019 atoms To find mass of this sample. Required data -…

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…

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Q: The smallest unit of charge is -1.6 x 10-19 C, which is the charge in coulombs of a single electron.…

A:

Q: The atomic radius of a gold atom is 144 x10-12 m.  The volume of a gold atom can be calculated using…

A:

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: A block of gold (Au) has the dimensions (I × b x h) = 0.7600 in x 8.558 mm x 1.816 cm. 1 in = 2.54…

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

A:

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: Which pair of elements would you expect to exhibit the greatest similarity in their physical and…

A: The properties of elements are dependent over their electronic distribution. The similarity in the…

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: The radius of a tantalum atom is 142 pm. How many tantalum atoms would have to be laid side by side…

A: The radius of tantalum atom =142 pm=142 x 10-12 m 1 pm = 10-12 m Diameter of tantalum atom =2 x 142…

Q: Calculate the mass, in kg, of sample. 1.22x10^27 manganese atoms

A:

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

A: Density is a physical quantity that can be determined with the help of the mass and volume of the…

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

A: Given :- radius of tungsten atom = 137 pm  To calculate :- number of tungsten atoms in 1.99 mm

Q: A certain compound is made up of one phosphorus (P) atom, three bromine (Br) atoms, and one oxygen…

A: The given compound contains one phosphorus atom, three chloride atoms and one oxygen atom. The…

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.