Suppose a new element is discovered and it has two stable isotopes. One isotope has a mass of 70.387 u and an abundance of 38.72%. The average atomic mass of the element is 72.046 u. What is the mass of the second isotope?

Q: An unknown element is a mixture of isotopes ¹²⁹X and ¹³²X. The average atomic mass of X is 130.79…

A: The isotope of the unknown element is given as 129X and 132X.  The average atomic mass of X is given…

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: (a) What isotope is used as the standard in establishing the atomic mass scale? (b) The atomic…

A: a)Atomic mass scale: It is relative scale used to determine the elements mass relative to…

Q: An element (A) has 5 isotopes. The masses (and abundances) of the isotopes 46A, 47A, 48A, 50A are…

A: Given:Average atomic mass = 47.87u.49A/50A = 3.361.

Q: During nuclear decay a 238 U atom can break apart into a helium 4 atom and one other atom. Assuming…

A: In the problem statement it is given that 238U undergoes nuclear decay to give a helium-4 atom and…

Q: The atomic weight of Ga is 69.72 amu. There are only two naturally occurring isotopes of gallium: 69…

A: Given atomic weight of Ga is 69.72 amu

Q: The water found on Earth is almost entirely made up of the 'H and 1°0 isotopes for a formula of H20…

A: The different variants of a particular element, that are differed by the number of neutrons. In…

Q: Potassium has 2 stable isotopes, 39K and 41K with atomic mass of 38.9637 amu and 40.9618 amu. If the…

A: Given: The average mass of potassium = 39.10 u The atomic mass of 39K = 38.9637 u The atomic mass…

Q: Two compounds of Cl and X are found to have molecular masses and % Cl, by mass, as follows: 137…

A: In first compound, Cl is 77.5 % and the total mass of the compound is 137 u. Calculate the mass of…

Q: In a naturally occurring sample, 19.8% of boron atoms have five neutrons and 80.2% have six…

A:

Q: 1. The noble gas, neon, has three isotopes of masses, 22, 21, and 20. If the isotopes have the…

A: Average atomic mass calculation: (1) Consider the given information is as follows;…

Q: The atomic masses of 6 Li and7Li are 6.0151 amu and 7.0160 amu, respectively. Calculate the natural…

A: The natural abundance of the heaviest isotope is to be calculated.

Q: A hypothetical element X has 2 major isotopes and an average atomic mass of 48.05 amu. Given that…

A: Average atomic mass=∑Atomic mass of an isotope×isotopic percentage100

Q: 7. The atomic masses of 203TI and 205TI are 202.972320 and 204.974401 amu, respectively. Calculate…

A: Given,Atomic mass of 203TI (isotope I) = 202.972320 amuAtomic mass of 205TI (isotope II) =…

Q: An unknown element is a mixture of isotopes 120X and 122X. The average atomic mass of X is 121.03…

A: ]Average atomic mass=Σ%abundance x mass of isotope100

Q: An unknown element is a mixture of isotopes ¹²⁹X and ¹³²X. The average atomic mass of X is 129.47…

A: Average atomic mass has Following formula - Average atomic mass = atomic mass of first isotope × % +…

Q: Assume that Element Q has the following three isotopes: 248 Q, 252 Q, and 259 Q. If the atomic mass…

A: Average atomic weight is the sum of the masses of the individual isotopes each multiplied by its…

Q: Bromine has two naturally occurring isotopes (Br-79 and Br-81) If the natural abundance of Br-79 is…

A: Given: There are two naturally occurring isotopes of Br. The abundance of isotope 1 = 50.69 % Mass…

Q: Cesium has 39 known isotopes ranging from mass 112 to 151. If a sample of cesium containing only…

A: The average atomic mass of any particular element which exists in two or more isotopic forms, can be…

Q: An imaginary element Z has two naturally occurring isotopes, ³Z and 4Z. ³Z has a mass of 3.016 amu,…

A:

Q: 2. The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. What does…

A: Answer: 75 Proton and 110 Neutron. Given,Element of Rhenium (Re) exist as two stable isotopes and 18…

Q: Copper has two naturally occurring isotopes, 63 Cu(62.9396amu)and 65 Cu(64.9278amu). If copper has…

A: %abundance of cu63= |63.546-64.9278|÷|64.9278-62.9396| So solve it  and  27% Cu63 Same for CU65= 73%…

Q: On another planet, the isotopes of titanium have the given natural abundances. Mass (u) Isotope 46TI…

A: Average atomic mass= (mass1×abundance1) +(mass2×abundance2) + (mass3×abundance3). Abundance of given…

Q: In an experiment, the reaction of 100.0 g of iodine produced 144.9 g of a compound formed from…

A: It is an example of law of conservation of mass

Q: Bromine has an average atomic mass of 79.904 amu. If Br-79 has a mass of 78.92 amu and Br-81 has a…

A:

Q: An element has two naturally occurring isotopes. One has an abundance of 37.4% and an isotopic mass…

A: Two naturally occurring isotopes.i. Abundance of 37.4% and an isotopic mass of 184.953 amuii.…

Q: There are three stable isotopes of silicon: 28Si, 29Si, and 30Si. Their masses and natural…

A: We have three isotopes of Si  having abundance and mass, we have to calculate the weighted average.…

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

A:

Q: An element consists of two isotopes. The abundance of one isotope is 95.72% and its atomic mass is…

A: From given Mass and percentage is given . So average atomic mass is determined by using the formula…

Q: What if a new element, Tyserium (Ty), was discovered and was found to have two isotopes, Ty-331…

A: The average Atomic mass of any element is the average of atomic masses of different isotopes present…

Q: The atomic mass of bromine is 79,904 amu. The atomic mass of the Br-81 isotope is 80.9163 amu and…

A: The atomic mass of bromine is 79.904 amu. This is actually the average atomic mass of Bromine which…

Q: What is the mass in amu of a carbon-12 atom?  Why is the atomic weight of carbon reported as 12.011…

A: The mass in amu of a carbon-12 atom is 12amu.

Q: If a fictitious element, X, has 2 naturally occurring isotopes; X-44 and X-46.  The atomic mass of…

A: Given: Fictitious element, X, has 2 naturally occurring isotopes; X-44 and X-46.  The atomic mass of…

Q: An element has three stable isotopes with masses of 27.977 amu, 28.976 amu, and 29.973 amu. The…

A: The average atomic mass of an element is calculated by considering the atomic mass of each isotope…

Q: On another planet, the isotopes of titanium have the given natural abundances. Mass (u) Isotope 46T.…

A:

Q: B) The average atomic mass of chlorine is 35.453. Does this mean that there are just two stable…

A: In order to explain the answer for the above question we have to first understand the given question…

Q: Copper has two naturally occurring isotopes, 63Cu (isotopic mass 62.9396 amu) and 65Cu (isotopic…

A: Given,Mass of 63Cu (isotope I) = 62.9396 amuMass of 65Cu (isotope II) = 64.9278 amuAtomic mass of Cu…

Q: 19. Two particles X and Y have the following composition: X: 17 protons, 18 neutrons, 17 electrons…

A: The question is based on the concept of atomic structure. there are various subatomic particles like…

Q: On a distant planet, the element silver has an average atomic mass of 107.94 amu and only two…

A: Average atomic mass of silver = M = 107.94 amu  Atomic mass of mass of one isotope (Let isotope A) =…

Q: Element X has two naturally occurring isotopes, 20X with a mass of 19.99 amu and 22X with a mass of…

A:

Q: Estimate the percentage of the total mass of a 58Ni atom that is due to (a) electrons, (b) protons,…

A: Ni-58 has 28 electrons, 28 protons and 30 neutrons in it

Q: An unknown element is a mixture of isotopes 151X and 153X. The average atomic mass of X is 151.69…

A:

Q: An unknown element X has the following isotopes: 12°X (22.00% abundant), 128X (34.00% abundant),…

A: Given that element = X, With three isotopes. X-126, X-128 and X-130. The percentage abundance are:…

Q: On another planet, the isotopes of titanium have the given natural abundances. Mass (u) Isotope 46TI…

A: The data given about the isotopes of the titanium with the natural abundances: The abundance of…

Q: Silver has two isotopes, one with 60 neutrons (percent abundance = 51.839%) and the other with 62…

A: Given: Silver has two isotopes. percent abundance of Isotope with 60 neutrons ( Ag47107 ) = 51.839%…

Q: what is the atomic mass of an unidentified element that has 2 naturally occurring isotopes with the…

A:

Q: A atom X has two naturally occurring isotopes. One isotope has a natural abundance of 71.99% with a…

A: Mass of isotope can be calculated using formula: Atomic mass of X = (mass of isotope 1 × %isotope 1…

Q: The atomic weight of Ga is 69.72 amu. There are 69.0 amu, and Ga, with a weight of 71.0 amu. The…

A: Let the percentage of the isotope 69Ga be =x%Then,The percentage of the isotope 71Ga is =(100−x)%

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.