Why would the collective mass of twenty pennies not be equal to ‘20 x’ the mass of any individual penny?

Q: Tin, element 50 on the periodic table, has 10 stable isotopes. 117^Sn makes up 7.687% of naturally…

A: Using the formula moles of Sn117 is calculated as,

Q: Determine the number of atoms of O in 29.7 grams of C12H22011.

A: To solve this problem we will first calculate the number of moles of C12H22O11 . Them we will…

Q: A copper ring is composed of 1.45×1023 atoms.1.45×1023 atoms. Calculate the mass of the ring in…

A: The mass of the ring in grams is to be calculated

Q: Al:CuCl2 ratio Mass of Al (g) Calculated mass of CuCl2 (g) 1:1 mass ratio 0.250   2:1 mass ratio…

A: Mass ratio:

Q: Which of the following chemical equations demonstrates the law of conservation of mass?

A:

Q: What amount, in moles, does this mass represent?

A: Number of moles = mass/molar mass  Molar mass of methanol is 32.04 g/mol

Q: If a sample contained 9.65 x 1023 atoms of iodine, how many grams would this be? Round to one…

A:

Q: Determine the mass in grams of 2.25 x 1021 atoms of copper. (The mass of one mole of copper is 63.55…

A:

Q: Find the mass in grams of C3H8O (isopropyl alcohol) that would contain 5.44x10^25 C atoms.

A: The question is based on mole concept. We have to calculate mass of alcohol present in the given…

Q: How many grams of gold (Au; atomic mass = 197.0 g/mol) contains 2.5 x 1020 gold atoms?

A: Number of moles = mass/molar mass  Mass = moles × molar mass  Molar mass of Au = 197.0 g/mol

Q: Deternine the mass in grams of 3.98*10^21 atoms of zinc. (The mass of one mole of zince is 65.39 g.)

A:

Q: SO2 has 8.50 × 10^24 molecules. What is its mass in grams?

A: Molar mass of any compound can be expressed in g mol-1 and atomic mass units. Every molecule has its…

Q: Determine the mass in grams of 6.77 × 10²¹ atoms of arsenic. (The mass of one mole of arsenic is…

A: We have to determine the mass in grams of 6.77 × 10²¹ atoms of arsenic. (The mass of one mole of…

Q: Determine the mass in grams of 2.31 × 10²¹ atoms of chromium. (The mass of one mole of chromium is…

A: The relation between mass and number of atoms:                                    Mass(g)molar…

Q: Determine the mass in grams of 4.83 × 10²¹ atoms of barium

A: Given :- number of atoms of Ba = 4.83 × 1021 atoms  Mass of 1 mol Ba = 137.33 g  To calculate :-…

Q: A sample of C,H, has 9.28 x 1024 H atoms. How many carbon atoms does the sample contain? number of…

A: The amount of substance is usually defined in terms of mole. The mole is the SI unit of the quantity…

Q: Data Table 51.589 3.053g 54.639 Mass of empty crucible Mass of hydrate Mass of crucible and salt…

A: Given: Mass of empty crucible = 51.58 g Mass of crucible and salt before heating= 54.63 g Mass of…

Q: The atomic mass of chlorine on a three-decimal-place periodic table is 35.453 u. Cl has two natural…

A:

Q: A sample of monochloro tetraborane (10), B4H9Cl, has a mass of 14 g. What amount, in moles, does…

A:

Q: Determine the mass in grams of 3.00 x 1021 atoms of arsenic. (The mass of one mole of arsenic is…

A: Given : number of arsenic atoms = 3.00 X 1021 atoms  mass of 1 mole of arsenic = 74.92 g

Q: Suppose you have a bucket of sand containing 1.5 billion grains of sand ( 1.5×109 grains). Most of…

A: Total number of grains = 1.5 ×109 grains Concentration of brown sand is = 4.0 %  The number of brown…

Q: Determine the mass in grams of 7.98 × 10²¹ atoms of carbon. (The mass of one mole of carbon is 12.01…

A:

Q: How many molecules are there in (3.61*10^ ^ 3)N 2 l 6 Answer to 3 significant figures. Note: Your…

A: Given :  Number of moles of N2I6 = 3.61 × 103  To calculate : Number of molecules

Q: A hypothetical element exists as two isotopes: I = 85.50 amu and II = 88.70 amu. If the percent…

A:

Q: Composition C-4 is a plastic explosive having a density of 1.05 g/cm3. Calculate the mass of a brick…

A: The brick has a shape of rectangle which has volume , V = L x W x H Where  L = length W = width H =…

Q: Determine the mass in grams of 7.94 × 10²¹ atoms of zinc. (The mass of one mole of zinc is 65.39 g.)

A: Given : Mass of 1 mole of Zinc = 65.39 g And number of atoms of Zinc = 7.94 X 1021 atoms.

Q: A drop of water has a volume of approximately 0.05 mL. How many water molecules does it contain? The…

A: Density of a substance is equal to the mass of the substance divided by its volume. Write the…

Q: Determine the mass in grams of 6.65 × 10²¹ atoms of barium. (The mass of one mole of barium is…

A: The mass in grams of 6.65 × 10²¹ atoms of barium has to be determined provided that the mass of one…

Q: The figure shows the reaction of element A ( lavender spheres) with element B ( tan) write the…

A: Stoichiometry of a reaction tells about number of mole of reactants reacts with each other forming…

Q: Determine the mass in grams of 4.52x10^21 atoms of arsenic. (The mass of one mole of arsenic is…

A:

Q: What is the mass of 1.89x10^23  atoms of chlorine?

A: Mass of 1 mol Cl = 35.453 g  Mass of 1 mol Cl2 = 70.906 g  1 mol contains = 6.022 × 1023…

Q: How many moles of nitrogen, N, are in 81.0 g of nitrous oxide, N₂O? Express your answer with the…

A:

Q: H. .C. II Three moles of the compound in the figure above would weigh how many grams? (The atomic…

A: Given  Moles = 3

Q: Determine the number of ethylene molecules, C 2 H 4 , in a 7.3 g sample of ethylene, [ans: 1.6 X 10…

A:

Q: Determine the mass in grams of 6.39 * 10 ^ 21 atoms of arsenic. (The mass of one mole of arsenic is…

A: Number of moles = Given no. of atoms Avogadro's NumberAvogadro's Number = 6.023 x 1023

Q: How much money, in dollars, does one mole of nickels represent?   If this amount of money were…

A: A Nickel is a currency coin mainly used in United States of America. The value of one nickel coin is…

Q: Composition C-4 is a plastic explosive having a density of 1.05 g/cm3. Calculate the mass of a brick…

A:

Q: How many carbon atoms are there in a 1.0-carat diamond? Diamonds are a form of pure carbon. ( 1…

A: Given:1 carat=0.20gWe know,Atomic mass of C=12.0107g/molalso, 1 mol of C=6.022×1023 atoms of C

Q: The average mass of one atom of carbon is 2.00 x 10 –23 g. How many carbon atoms are present in a…

A: Given:Mass of one atom of carbon = 2.00 x 10 –23 g.Total mass of sample of carbon = 40.0 g.

Q: What is the mass in grams of 1.37 × 1016 chromium atoms?

A:

Q: Determine the mass in grams of 8.16 x 10^21 atoms of zinc. (The mass of one mole of zinc is 65.39 g

A: To determine the mass in grams of atoms of zinc, we can use the following steps:Find the molar mass…

Q: <p>Two substances have the same molecular and empirical formulas. Does this mean that they…

A: A molecular formula uses chemical symbols and subscripts to indicate the exact numbers of different…

Q: Determine the mass in grams of 2.25 × 10²¹ atoms of copper. (The mass of one mole of copper is 63.55…

A: Mole concept: According to the mole concept, the number of particles in one mole of the substance is…

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.