A newly discovered element, Q, has 3 isotopes weighing 350 amu, 355 amu and 357 amu. If the abundances of these isotopes are 50.0%, 24.0% and 26.0% respectively. What is the atomic mass of Q? 353 amu 357 amu 354 amu 355 amu None of the above

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

A: Given information:

Q: There are two naturally occurring isotopes of chlorine. 35 Cl has a mass of 34.9689 u. 37 Cl has a…

A:

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: Explain why these alkyl halides form carbocations at different rates. Your answer should use some…

A: Both the carbocations formed in the chemical reaction of alkyl halides are tertiary carbocations.…

Q: 90 Electrons. neutrons 2. Yttrium was discovered in 1794. It is one of the elements used in…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: There are two naturally occurring isotopes of rubidium. What is the abundance of each isotope?…

A: The abundance of each isotope is to be calculated.

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

A:

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

A:

Q: If an element, El, has two isotopes with the masses and abundances listed below: 72El: 72.1961 amu;…

A: The element that possesses distinct number for neutrons (might be less or more) as compared to its…

Q: Carbon exists as 3 isotopes. It is 88% C-12, 1% C-13 and 11% C-14. What is the average atomic mass…

A: average atomic mass= isotop% multiplied by atomic mass /100

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: Thallium (Tl) has two naturally occurring isotopes: Tl-203 (29.52 % ; mass = 202.972 amu ), and…

A: Average Atomic Mass of an atom can be calculated by using following formula -   Average atomic mass=…

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: 1.) Show both the intramolecular bond (bond between atoms) and the intermolecular bond (bond between…

A: Given :  1.) Show both the intramolecular bond (bond between atoms) and the intermolecular bond…

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: The average atomic mass of Y is 54.6 . one isotop has an atomic mass of 53 and the other isotop has…

A: •Given:- Average atomic mass of Y =54.6 Isotope 1 mass (m1)= 53 Assume isotope 1 abundance(x1) is…

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

A:

Q: A newly discovered element, X, has 3 isotopes weighing 350 amu, 355 amu, and 357 amu. If the…

A: Given:3 isotopes of X weighs 350 amu, 355 amu, and 357 amuAbundances of these isotopes are 50.0 %,…

Q: Two unknown elements A and Z combine to produce two different compounds: AZ2 and A2Z3 If 0.15 mol…

A: Mole concept :-  1 mole = 6.022×1023 (Avogadro's number)  The mass of one mole of molecules of a…

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: 2. Element "X" has 2 naturally occurring isotopes with the following masses and natural abund X-69…

A:

Q: An unknown element is a mixture of isotopes ¹²⁰X and ¹²²X. The average atomic mass of X is 121.47…

A: For an element that exists as a number of isotopes, its atomic mass is calculated by taking an…

Q: Which of the following isotopes has the highest number of neutrons? 15 7F 17 8.

A: The given options are,

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: Cu has two isotopes; 63 Cu in 70 % and 65 Cl in 30%. The average atomic mass of Cu atom. Is * O 63 О…

A: Given Natural abundance (%) Atomic Mass  63Cu 70 65 65Cu 30 63

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: There are only two naturally occurring isotopes of Copper, 63 Cu and 65 Cu. Copper has an atomic…

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: 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: When Dalton began his calculations to determine atomic masses he had to make a number of…

A: A compound is a substance that is made of two or more elements. Generally the compound may contain…

Q: Iron exists in nature as a mixture of predominantly three isotopes: 54 Fe (53.94 amu), 56 Fe (55.93…

A:

Q: Potassium has three isotopes with masses 38.9367 amu, 39.9640 amu, and 40.9618 amu. The abundance of…

A: Abundance of other two isotopes can be calculated as:-

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.