. Calculate the molar mass of an element which has 12 protons from the following list of elements, their number of protons and neutrons and their   abundance.    a. 22% of the elements isotopes have 12 protons and 11 neutrons b. 26% of the elements isotopes have 12 protons and 13 neutrons   c. 34% of the elements isotopes have 14 protons and 12 neutrons c. 52% of the elements isotopes have 12 protons and 14 neutrons

Q: In 1808, John Dalton proposed a series of statements regarding the atom that became known as…

A: Given, Five statements of Dalton's atomic theory is given -     Required,                   Among…

Q: Static electricity is observed when whic part of the atom is transferred? a. Protons b. Neutrons I…

A: Static electricity is observed when electrons are transferred .  Naturally occurring static is…

Q: 2. Nitrogen is made up of two isotopes, N-14 and N-15. Given nitrogen's atomic weight of 14.007,…

A: Given,  Average atomic weight of N = 14.007  Mass of N-14 isotope = 14.003074 g/mole  Mass of N-15…

Q: a. Oxalic acid is a crystalline solid with the molecular formula H2C2O4. A sample of pure oxalic…

A:

Q: 17. Sergio's teacher gave him a sample of a substance to identify. His teacher told him it is either…

A: Metal are hard , shiny, magnetic , and a good conductor of electricity .

Q: S Ina 3.7-gram sample, there are (A) 1.1 x 10 atoms of gold (B) 3.2 x 1025 atoms of gold (C) 4.4 x…

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Q: 9. What 9. What is the difference between a molecular element and an atomic element? List the…

A: Element is a substance which cannot be broken down into simpler unit.It is purest form any…

Q: Find the mass of 236 atoms of tungsten in Kg

A: Tungsten is a chemic element having atomic number 74. Chemical symbol of tungsten is 'W'  According…

Q: Back on planet Earth, elements have different isotopic distributions. The atom Chlorine ( Cl ) has…

A:

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: Only two isotopes of copper occur naturally, Cu (atomic mass = 62.9296 amu; abundance 69.17%) and Cu…

A: Given,First isotope:Copper atomic mass = 62.9296amu.Abundance = 69.17% = 0.6917.Second…

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: What is the amount, in moles, of each elemental sample? 11.8 g Ar

A: Given : mass of Ar = 11.8 g

Q: As we look around space we find that most of it is composed of (4)_ hydrogen combines with carbon it…

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Q: How many prtotons, neutrons and electrons are present in the antimony (III) ion ?    The number of…

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Q: Gaseous butane will react with gaseous oxygen (02) to pr 1.16 g of butane is mixed with 6.9 g of…

A: Given the chemical reaction between butane gas and oxygen gas. The products of the reaction are:…

Q: When a piece of cadmium (Cd) is placed a solution of nickel chloride (NICI2), the following reaction…

A: Hey, since there are multiple subparts posted, we will answer first eight subparts. If you want any…

Q: e.) Light travels 186 000 miles / second. How long is a light year in meters? (1 light year is the…

A: 3. e.) Given: Light travels 186 000 miles/second. First determine the number of seconds value in one…

Q: Element X has two stable isotopes: 35X - 75.77%, 34.97 amu 37X - 36.97%, 36.97 amu a.  Calculate the…

A: a) Note : the % you have mentioned for 37X is not possible as total % of both is becoming > 100%…

Q: Boron has two possible isotopes. Based on the average atomic mass on the Periodic Table (10.81 amu),…

A: Boron is an inorganic element with atomic no. 5. It exists in two different isotopes, .e. Boron-10…

Q: 1. Naturally occurring chlorine that is put in pools is 75.53 percent"CI (mass = 34.969 amu) and…

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

Q: 1. All atoms of a given element have the same c. number of nucleons. d. number of protons. a. mass…

A: 1. Answer - The correct option is (d) number of proton. All atoms of an element have the same number…

Q: The element X has isotopes. The masses (atomic mass unit) and % abundances of the isotopes are given…

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Q: 25.  The average atomic masses of some elements may vary, depending upon the sources of their ores.…

A: Given,Actual mass of naturally occurring boron 10B, 10.0129 amu and 11B, 11.00931 amu.The actual…

Q: Determine which sample contains the mos atoms. A 10 g sample of Uranium 11 g sample of copper  1 g…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: An element has three isotopes, A, B, and C. Percent abundance of the isotopes A and C are 60 % and…

A: The percent natural abundance of isotope A is 60%. The percent natural abundance of isotope C is…

Q: Show your calculations clearly. Suppose you are provided with a 36.55 g sample of potassium…

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Q: A solid circular cone made of pure platinum (d = 21.45 g/cm3 ) has a diameter  of 2.75 cm and height…

A: Density of a substance is given by the ratio of mass to its volume. Density = MassVolume Volume of a…

Q: 3) In a far away land and long ago, a series of experiments were carried out. Three samples of…

A: In 2) Use law of constang proportion Divide the both Kalium and pyron masses We see that A same and…

Q: In any neutral Adam there are equal numbers of? A. Neutrons and electrons B. Protons and neutrons…

A: Neutral atom are those having not any charge. They are wholely neutral

Q: Naturally occurring elements are originally formed: O A. Inside the core of stars, or when stars…

A: Naturally occurring elements as the name suggest, it is formed naturally not by any man made actions

Q: . The Law of Conservation of Mass proves that A. the number of atoms in a chemical reaction does…

A: Given: Law of conservation of mass.

Q: places explain/ give example. The law of multiple proportions ATOMIC STRUCTURE AND SYMBOLS…

A: The fundamental quantity of compound is element. A compound is made of many such elements that…

Q: 16 53 25 S Mn Iodine 32.06 126.905 54.938 Atomic # = Atomic # = Atomic # = Atomic Mass = Atomic Mass…

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Q: An element has two naturally occurring isotopes the first isotope has an abundance of 30.37% and a…

A: With data's given Initially we are finding percentage abundance of another(second) isotope and then…

Q: Sulfur (S) is a non-metallic element that can be found in coal. When coal is burned, sulfur is…

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Q: It is discovered that it contains 7.759 %  by mass of  of the element oxygen (molar mass 16.00…

A: To calculate empirical formula of compound Ontarium , we first calculate moles of both Oxygen and…

Q: Write each element in its standard form. 1. Zirconium a. atomic number = 40 b. number of neutron =…

A: Since you have posted multiple questions, we are entitled to answer the first only. Please repost…

Q: macroscopic structure level is! A. Structural elements that may be viewed with naked eye B.…

A: Given : We have to tell about macroscopic structure level.

Q: The element argon has three isotopes and an average atomic mass of 39.948 u. Idenitfy the most…

A: Given that, Average  Atomic mas s of At=39.948 amu

Q: Imagine a new element (symbol X) has been found on Mars. Four isotopes of the element have been…

A: Average atomic mass of element X can be calculated by using the equation: Average atomic mass of X =…

Q: Naturally occurring silicon consists of three isotopes with the following isotopic masses and…

A: The three isotopic masses of silicon and their relative abundance have been provided. The average…

Q: Sample of zinc contains 2,5 moles of zinc atoms. The mass of the zinc sample is.. a. 164,575g b.…

A:

Q: For element X there are 3 isotopes in nature. The atomic masses in amu and the % abundance of the…

A: Given :-  ELEMENT Atomic mass  Abundance (%) 20X 19.9924391 90.51 21X…

Q: How are isotopes of an element identical to one another? How are they different from one another

A: Isotopes of an element is defined as atoms of same element having different mass Number but same…

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.