What fraction of the a particles in Rutherford’s gold foil experiment are scattered at large angles? Assume the gold foil is two layers thICK, and that the approximate diameters of a gold atom and its nucleus are 2.7 Å and 1.0 * 10–4 Å, respectively. Hint: Calculate the cross sectional area occupied by the nucleus as a fraction of that occupied by the atom. Assume that the gold nuclei in each layer are offset from each other.

Q: After reading the mass spectrometer we have found that the substance under investigation contains…

A: The percentage of the different elements for the given compound is as follows: The percentage of…

Q: 2. The approximate radius of a nucleus, r, is given by the formula r = A$(1.3x10-13cm), where A is…

A: Given: Atomic radius of Al = 143 pm Radius of nucleus=A13(1.3×10-13) cm

Q: Lithium has two stable isotopes, 6Li and 7Li. If a sample is composed of 48.0% of the lighter…

A: Average mass of an element is defined as the atomic mass of the element calculated by multiplying…

Q: 12. How many grams are there in 1 x 1024 molecules of BC13?

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

Q: Consider a rectangular piece of printer paper that is 8.5’’ x 11’’ (’’ denotes inches). In order to…

A:

Q: Consider the hypothetical reaction of the real-life element iron and the fictional element vibranium…

A: Solution:- Given:- Reaction > Fe + Vi →Fe4Vi3  Balanced chemical equation:- 4Fe + 3Vi → Fe4Vi3…

Q: How much would 2.4 x 1024 molecules of N2O5 weigh?

A: Given- number of Molecules =2.4 ×10^24 molecules

Q: 1. The charge required to deposit 40.5 g of Al (atomic mass = 27.0 g) from the fused Al,(SO), is:…

A: here the question is from faraday law :- According to the Faraday law , the masses of different ion…

Q: How many grams would 4.15 x 1021 atoms of Pb weigh?

A: Answer

Q: What is the mass in kilograms of 5.6 x 1027molecules of carbon tetraiodide?

A: Number of molecules of carbon tetraiodide (CI4) is 5.6 × 1027 One mole contains Avogadro’s number of…

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

A:

Q: 29 3. What information cannot be determined from the symbol notation 14Si? O the atomic mass O the…

A: The symbol notation given is

Q: Suppose 2.367g of TiO2- containing sample evolves 0.143g of O2. What is the mass percent of TiO2 in…

A: The equation involved in the determination of purity of TiO2 sample is as follows.…

Q: The natural isotopes of boron have masses 10.0129 and 11.0093 amu, with relative % abundance of 19.9…

A: Given: Mass of one isotope is 10.0129 amu. Mass of second isotope is 11.0093 amu. Relative %…

Q: A Matter can not be created or destroyed, The mass of the reactants in a ch reaction will equal the…

A: Chemical bond is M Two types of chemical bonds are L Chemical reaction K Reactants F…

Q: The mass of a proton is 1.673 x 10-27 kg and the diameter of the nucleus of the H atom is 1.0 x 10°…

A: Given in the question, Mass of proton = 1.673 ×10-27kgDiameter of nucleus = 1.0 ×10-3 pm Radius of…

Q: How many protons are contained in a circular puddle of liquid mercury that is 6.25 inches wide and…

A: In the given question we have to calculate the number of proton contained in a circular puddle of…

Q: What fraction of the a particles in Rutherford’s gold foil experimentare scattered at large angles?…

A: The cross-sectional area occupied by the nucleus as a fraction of that occupied by the atom can be…

Q: The radioactive nuclide with the symbol 75Se is used to measure the shape of the pancreas. What is…

A: The atomic number of Se is 34 and the mass number of this radioactive nuclide of Se is 75. Atomic…

Q: The molar mass of nicotine C10H14NX is 162 g/mol. What is the value of x?

A:

Q: 18.5 How many moles are in a 2.40 cm × 2.40 cm × 2.40 cm cube of copper?

A:

Q: What does 1/5 have to do with this equation?     You take three compounds, each consisting of two…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: This question will walk you through the process of calculating the number of atoms present in a…

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Q: Why is it important, in carbon dating, to consider the ratio of carbon-14 atoms to other carbon…

A: Applying carbon dating principle i.e . ratio of C-14/ C-12 . As shown my handwriten solution.

Q: What is relative abundance

A: Given question is :  What is relative abundance = ?

Q: A new compound has the empirical formula GaCl2. Thissurprises some chemists who, based on the…

A: The empirical formula of new compound is s GaCl2 . Since gallium is belongs to group 13, it exhibit…

Q: Why must atomic masses be weighted averages rather than conventional average values?

A: atomic mass is mass of atom which have amu unit .

Q: Devise a general method for determining the fractional abundances of two or more isotopes from a…

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

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: How many Sn atoms are there in a 20.7 gram sample of Sn ?

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: 1.)fluorine-20 Express your answers as integers separated by a comma. 2.)cobalt-63 Express your…

A: Let   MEA  where , E = element                 A= atomic number =Number of protons…

Q: . Write an equation describing the relationship between the mass number (A), the number of protons…

A: 1.  Atomic number is represented by  Z  Atomic number is defined as number of protons  in the…

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: 5. How many protons (P), neutrons (n) and electrons (e) are present in 18173Ta-³? a. 76 p 105 n 73 e…

A: (5) The number on the bottom left corner is the atomic number, which tells you the number of…

Q: the complete decomposition of 1.0 gram of potassium chlorate gives potassium chloride and oxygen…

A: A numerical problem based on mole concept, which is to be accomplished.

Q: 1. Sketch and label the main parts of the mass spectrometer. 2. Give detail description about how it…

A:

Q: (2) (3) If an atom with 38 protons undergoes B-decay, the species formed will have, (A) 37 (B) 38…

A: The nucleus undergoes these emission reactions due to more number of neutrons than protons in the…

Q: What is the average mass, in grams, of one Zn atom?

A: Given :- Number of atoms of Zn = 1 atom  To calculate :-  Average molar mass of single atom of Zn…

Q: Calculate the mass in grams of each of the following and provide the answer in scientific notation…

A: The number of moles is equal to the ratio of mass to the molar mass of the atom. It is denoted by n.…

Q: Consider the following equation: The mass number of element X is: 247A + 18B → 89C + {x}X + 2 1n

A: 247A  + 18 B ---------------> 89C  +   xX  + 2  1n

Q: 1A 2A 8A Atomic Number 1 E ЗА C 1 W 4A 5A 6A 7A G Zy 6. 4. K V P. Ad 8. 6. 10 11 12 13 14 15 Q U H.…

A: Amount of product formed is defined with the help of Limiting reagent using stoichiometric…

Q: Which of the following statements are true of chemical reactions? a. The number and types of atoms…

A: A chemical reaction will occur between two or more reactants, and during the reaction, law of…

Q: Calculate the mass of antimony(III) lodide, Sblg, that can be produced by the reaction of 143 g of…

A:

Q: Explain the Schematic of a mass spectrometer ?

A: A mass spectrometer is an instrument that is very useful in the structure elucidation of organic…

Q: 8. How many milligrams of iron are delivered from a 250. mg tablet of FeSO,-7H,O? Percentage %CaCl,…

A: Q9) U3O8 molar mass                 Atomic mass of U =238       Atomic mass of oxygen =16…

Q: Determine the nuclear composition (number of protons and neutrons) of the following isotopes. (a)…

A: Since you have posted questions with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: Consider a sample that consists of three green spheres and one blue sphere. the green mass is 3.00g…

A: Given : Mass of green spheres = 3g Mass of blue sphere = 1g

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.