A rough estimate of the radius of a nucleus is provided by the formula r 5 kA1/3, where k is approximately 1.3 × 10-13 cm and A is the mass number of the nucleus. Estimate the density of the nucleus of 127I (which has anuclear mass of 2.1 × 10-22 g) in grams per cubic centimeter. Compare with the density of solid iodine, 4.93 g cm-3.

Q: formula NISO,•XH2O? 4

A:

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Answer: In this question we have to calculate the average atomic mass of Ru with the help of…

Q: amino acid methionine is depicted in the picture.  C5H11NO2S is the molecular formula for…

A:

Q: 3. The (hypothetical) ionic compound F2INAIS2 (243.93 g/mol) dissolves in 500.0 mL of hot water to…

A:

Q: Please calculate, how many atoms exist in 1cm^3 of copper with the density 8,93 gr/cm^3 and the…

A: 1 cm3 of copper with the density 8.93 g/cm3, whose number of atoms is to be determined.

Q: Consider the following equation: The mass number of element X is: 218A+ 15B 100C + xlx +4n

A: Recall the given reaction         218A + 15B →100C + XX + 4 1n In the nuclear reaction summation of…

Q: Using a deuteron beam, a sample of isotopically enriched fluorine is generated, consisting of 18F…

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Q: If the density of indium is 7.31 g/cm', how many atoms are there in a indium piece of 30 dm wide, 5…

A:

Q: 1.) The energy change in a chemical reaction comes from a change in mass. Calculate the mass change…

A: Step 1 Given: The ∆H°rxn is -802.35 kJ/mol. Introduction: Einstein equation gives us the…

Q: What is the radius (in cm) of a pure copper sphere that contains 1.27*1-^24 copper atoms?  The…

A:

Q: How to calculate the relative atomic mass (6.015122) of 6Li, from the atomic mass of Lithium?

A: In the given question we have to calculate the relative atomic mass of Lithium.  we know that,…

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Isotopes are the species of same element having same atomic number but different atomic masses due…

Q: A 6.700-g hydrate of sodium sulfate, Na2SO4-nH2O loses 2.896 g of its mass upon heating. The mass…

A: In this question, we will determine the value of n ( where n is the number of water molecules )…

Q: What is the major problem with the equation Ca (s) + 2 H₂O (1) --> Ca(OH)2 (aq) + H₂ (g)? Select…

A: When calcium reacts with water, it results in the production of hydrogen gas and calcium hydroxide.…

Q: A sample of solid silver oxide with a mass of 0.114 grams was reduced to elemental silver by heating…

A: Note - To calculate the mass percent of each elements in silver oxide, we should have the value for…

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Answer:We are given percentage abundance of two isotopes of Sn along with their atomic masses and we…

Q: s 9497644 00e lt Cf 3. The actual mass of one atom of an element is 4.480 x 10-23 g. An swer parts…

A: (a) The atomic mass of the element is

Q: If the density of indium is 7.31 g/cm', how many atoms are there in a indium piece of 30 dm wide, 5…

A: Density of an element is defined as the ratio of the mass of the element to its volume.…

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Mass number describes the approximate mass of the nuclues of a single atom, but average atomic mass…

Q: How to calculate the relative atomic mass (6.015122) of 6Li, from the atomic mass of Lithium?

A: As we know,  Relative atomic mass = atomic mass of an atom / 1 amu

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: On a mission to a newly discovered planet, an astronaut finds gallium abundances of 60.11 %% for…

A: The average atomic mass of an element can be calculated as shown below.

Q: (a) What percentage of the electrons originally in the cube was removed? % (b) By what percentage…

A:

Q: An element, X, has the following isotopic composition: X-200, 90%; X-199, 8.0%; and X-202, 2.0%. Its…

A:

Q: How many protons and neutrons are present in 118Sn4+?

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Q: What element is x? O Mercury O Bromine O Rhodium O Xenon O Ytterbium

A:

Q: If the density of indium is 7.31 g/cm², how many atoms are there in a indium piece of 30 dm wide, 5…

A:

Q: Give the name and formula of the compound formed from thefollowing elements:(a) ₃₇Q and ₃₅R(b) ₈Q…

A: (a) The atomic number of an element is written as a subscript on left side of symbol of the element…

Q: An atom has a diameter of 3.00 Å and the nucleus of that atom has a diameter of 7.50 × 10-5 Å.…

A:

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: The data given is,

Q: The isotope of plutonium used for nuclear fission is 239Pu.Determine (a) the ratio of the number of…

A: Concept Introduction: The atomic number is equal to the number of protons and number of electrons…

Q: The number of electrons and protons in Fe*2 are(atomic number=26)

A: Given :- Fe+2  Atomic number of Fe = 26  To find out :- number of electrons and protons.

Q: What is the differences between an Oxygen atom (16 amu, atomic number = 8) and a Calcium atom (46…

A: Oxygen atom = 16amu Calcium atom = 40amu  Metal- it have tendency to lose electron. Non metal - it…

Q: A group 8 element (MM) reacts with fluorine to give MF2. The same element reacts with oxygen to give…

A: Here it is group 8 element so it will be probably iron (Fe). Because FeF2 and Fe2O3 is probably the…

Q: Determine the number of sodium atoms in 49.78 g of the element.

A: Given: Mass of sodium i.e. Na = 49.78 g.

Q: One of the heaviest atoms found in nature is 238U. Its relativeatomic mass is 238.0508 on a scale in…

A: Given, 238U relative atomic mass is 238.0508

Q: The negative muon (μ−) behaves like a heavy electron, with the same charge as the electron but with…

A: We have a system consisting of a nucleus of platinum (Pt195 with 78 protons and 117 neutrons) and…

Q: The most common isotope of oxygen has a mass number of 16, but two other isotopes having mass…

A: Isotopes are the compounds having same atomic number but different mass number.  They have same…

Q: An atom of 14C contains 6 O 20 8 protons.

A: we have to tell numbers of proton in carbon - 14

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.