How many atoms of 1°B are there in a 3.51 gram sample of this particular isotope? 1.72 x 1024 atoms 2.11 x 1023 atoms O 8.01 x 1023 atoms 1.76 x 1023 atoms 1.96 x 1023 atoms

Q: If 4.18x10^22 atoms of element Y have a mass of 2.46g what is the identity of element Y

A:

Q: Silver has an average atomic mass of 107.87 u. If 48.18% of Ag exists as Ag-109 (108.9047 u), what…

A: Given,average atomic mass of Ag = 107.87 u% abundance of Ag-109 = 48.18 %atomic mass of Ag-109 =…

Q: On earth, tin has 10 different stable isotopes. The heaviest, 124Sn makes up 5.80% of naturally…

A: Grams of 124Sn present in 38.3 g sample     = 38.3*(5.80/100)= 2.22 g

Q: How many grams of Cr are there in a sample of Cr that contains 6.84×1023 atoms? grams

A: The amount of chromium present can be calculated as

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: In a sample of gallium there is 60.2% of gallium-69 (68.9 amu) atoms and 39.8% of gallium-71 (70.9…

A:

Q: A sample of aluminum foil contains 9.50×1023 atoms.9.50×1023 atoms. What is the mass of the foil?

A: Since, Moles is the ratio of mass to the molar mass of that atom or molecules. Also, Number of atoms…

Q: A sample of aluminum foil contains 7.80×10^23 atoms. What is the mass of the foil?

A: A sample of aluminum foil contains 7.80×1023 atoms. The mass of the foil is to be calculated.

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: A sample of atoms has an average atomic mass of 188.2 amu. If this sample consists of two naturally…

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Q: A 64.36 g sample of XO2 contains 25.79 g of oxygen atoms. What is element X?

A: Given,      A 64.36 g sample of XO2 contains 25.79 g of oxygen atoms . To determine the identity…

Q: A sample of aluminum foil contains 4.50×1023 atoms.4.50×1023 atoms. What is the mass of the foil?

A: Given,  Number of atoms of Al foil = 4.50 x 1023 atoms  Mass of the Al foil = ?

Q: A sample of Aluminum foil contains 6.30 x 10^23 atoms. What is the mass of the foil

A: One mole of any substance contains 6.023 X 1023 units of that substance (atoms, ions or Molecules) .…

Q: How many grams would 4.15 x 1021 atoms of Pb weigh?

A: Answer

Q: An element has three isotopes with the following masses and percent natural abundances. Determine…

A: Given that,

Q: An unknown element X has the following isotopes: 25X (80.50% abundant, mass = 25.03 amu) and 27X…

A: isotopes of X 25X: abundance - 80.50%                       (P1) = 80.50/100 = 0.8050          mass…

Q: An unknown element X has the following isotopes: 52X (88.00% abundant), 4⁹X (8.00% abundant), 5⁰X…

A: The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by…

Q: An unknown element X has the following isotopes: ⁵²X (90.00% abundant), ⁴⁹X (8.00% abundant), ⁵⁰X…

A: The approximate atomic mass of element x is calculated as,

Q: An unknown element X has the following isotopes: 1ºX (20.00% abundant, atomic mass = atomic mass =…

A:

Q: An unknown element X has the following isotopes: ²⁵X (80.50% abundant, mass = 25.03 amu) and ²⁷X…

A:

Q: isotope 12 C 13 C mass (amu) 12.000 13.003 natural abundance п% %*

A: Natural abundance: The relative amount of the isotopes of an element as it occurs in nature.Isotopes…

Q: A sample of gallium contains two isotopes and its atomic weight is 69.72 amu. If the sample is…

A: Isotopes can be defined as the members of same family having same atomic number but different mass…

Q: Neon has three different isotopes.  90.51% of neon atoms have a mass of 19.992 amu.  0.27% of neon…

A:

Q: Consider two compounds. Compound A contains 2.77 g of phosphorus and 9.53 g of chlorine. Compound B…

A: Given,Mass of Phosphorus in compound B =11.9gMass of chlorine in compound B =40.9g

Q: An unknown element X has the following isotopes: 52X (87.00% abundant), 4⁹X (8.00% abundant), 50X…

A: The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by…

Q: D Suppose that fictional element X has an average atomic mass of 74.029 u. Element X has two…

A: Given -> Average atomic mass = 74.029 u Isotope -1 has mass(m1) = 72.021 u Isotope -1 has…

Q: Complete the table below, using the diagram of an atom shown at right. name symbol 8 0 proton Bo n 0…

A:

Q: Part B A certain element X has four isotopes. 4.350% of X has a mass of 49.94605 amu. 83.79% of X…

A: We have to calculate no. of neutrons in part A and average atomic mass in part B

Q: Silver has an atomic mass of 107.868 amu. The Ag-109 isotope (108.91 amu) is 48.16%. What is the…

A: Answer : The correct option is (B)  106.91 amu    Given : Atomic mass of silver     = 107.868 amu…

Q: A mass of 7.86 g of an element is known to contain 2.31 x 1023 atoms. What is the atomic mass of the…

A: In this question given  Number of atom , and mass of elements

Q: what is the mass of 7.15 x 10^22 aluminum atoms?

A: Given, Number of Aluminium atoms = 7.15×1022

Q: What is the mass of 4.50 x 10 22 Cu atoms?

A:

Q: How many atoms are contained in a block of aluminum metal measuring 6.0 mm x 5.0 mm x 15 mm? The…

A:

Q: How many silver atoms are there in 3.86 gg of silver?

A: Given, The mass of silver = 3.86 grams. Number of atoms of silver in this amount are: