Hydrogen sulfide is a gas with the odor of rotten eggs. The gas can sometimes be detected in automobile exhaust. It is a compound of hydrogen and sulfur in the atomic ratio 2 : 1. A sample of hydrogen sulfide contains 0.587 g H and 9.330 g S. What is the atomic weight of S relative to H?

Q: The two naturally occurring isotopes of element X are ^18X (80%) and ^19X. What is the average…

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

Q: Three magnesium isotopes have atomic masses and relative abundances of 23.985 amu (79.99%), 24.986…

A: The atomic of an element = Σ Atomic mass ( Isotope ai ) X Abundance (Isotope ai) Atomic masses and…

Q: Almost all boron atoms are found in two forms: boron-10 and boron-11. Both isotopes behave alike…

A: Given, Boron atoms are found in two forms: boron-10 and boron-11 Average mass of B = 10.81 amu

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: What is the radius (in cm) of a pure copper sphere that contains 1.14 * 1024 copper atoms? [The…

A: Given information:

Q: hydrogen phosphide can be decomposed to give phosphorus and hydrogen in a mass ratio of 10.32:1.00.…

A: the molecular formula of this substance is PH3 and the name of this compound will be phosphine.

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: 1. a) Boron, ¹B has relative atomic mass of 10.81 amu and its mass number is 11 amu. Explain why the…

A: Q1. Given: Boron-11 has: Atomic mass= 10.81 amu Mass Number = 11

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: 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: 2) Uranium is used in nuclear reactors and is a rare element on earth. Uranium has three common…

A: Step 1: Step 2: Step 3: Step 4:

Q: Copper, which has an average atomic mass of 63.546 amu, has two stable isotopes: copper-63 and…

A: Given,Atomic mass of Copper-63 = 63.546 amuAbundance of Copper-63= 69.15%

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: 1. Lithium occurs in nature as a mixture of two isotopes: Li, which has an atomic mass of 6.015 amu,…

A: Given;

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: Calculate the mass ratio: 0.445 g Iodine 0.117 g Zinc (g Iodine/g Zinc)

A:

Q: A sample of magnisium contains three isotopes and its atomic weight is 24.35 amu. If the sample is…

A: A element has several isotopes in nature and its occurrence by percentage is called abundance.…

Q: 7. Gallium has two naturally occurring isotopes. The mass of gallium-69 is 68.9256 amu and it is…

A: Average Atomic mass = (mass of 1st isotope x % abundance of 1st isotope + mass of 2nd isotope x %…

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

A:

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: The decomposition of sulfuryl chloride at 320 degrees Celsius proceeds according to a reaction of…

A:

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: Copper has 2 stable isotopes, namely Cu-63 and Cu-65. The atomic masses of the said isotopes are…

A:

Q: Hydrogen sulfide is a gas with the odor of rotten eggs. The gas can sometimes be detected in…

A: Given gas: Hydrogen sulfide (H2S) Atomic ratio of hydrogen and sulfur is 2:1. The given mass of…

Q: A lead atom has a radius of 177 pm. To cover a distance of 2.17 mm, how many lead atoms would have…

A:

Q: Naturally occurring bromine is composed of two isotopes: 50.69 % Br-79 (mass of 78.9183 amu) and…

A: Given,Naturally occurring bromine is composed of two isotopes:50.69 % Br-79 (mass of 78.9183 amu)…

Q: Copper has two naturally occurring isotopes with atomic masses of 62.9296 u (C u) and 64.9278 u…

A: When two atoms have same atomic number and different atomic mass, such atoms are called isotopes.…

Q: Tin has 10 stable isotopes. The heaviest, ¹24Sn, makes up 5.80% of naturally occurring tin atoms.…

A: We have to calculate atoms of 124Sn  and total mass of atoms of  124Sn

Q: 6. Calculate the atomic mass of a cosmic sample of silicon. The three silicon isotopes have atomic…

A: Given that silicon has 3 isotopesthe atomic mass of the first silicon isotope     is  = 27.9769 amu…

Q: Lithium, is used in dry cells and storage batteries and in high temperatures lubricants, it has two…

A: Given- M1=6.01521 M2=7.016003 A1 (%)=7.50 A2(%)=92.50

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: 2.77/The radii of the lithium and magnesium ions are 76 pm and 72 pm, respectively. Which compound…

A: Given, Radii of Li = 76 pm  Radii of Mg = 72 pm  Which has more ionic attraction = ?

Q: 5. A sample of Magnesium contains three isotopes and its average atomic weight is 24.35 amu. If the…

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.