(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 8.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mol.

Q: What is the mass, in grams, of 8.52 × 10 15 atoms of gold present in one nanoparticle?

A: given, atoms of gold present in one nanoparticle = 8.52 × 10 15 atoms the molar mass of gold, Au =…

Q: If the molecular mass of an oxide of nitrogen is 108 and 4.02 g of N combine with 11.48 g of O, what…

A: Given, Given mass of nitrogen = 4.02 g Molar mass of nitrogen = 14.01 g/mol Given mass of oxygen =…

Q: the number of copper atoms in a 3.0g lump of copper is 2.8x1022 .how many electrons present in the…

A: Number of copper atoms = 2.8 × 1022  We need to determine number of electrons present.

Q: A certain metal, M, forms two oxides, M2O and MO. If the percent by mass of M in M2O is 73.4%, what…

A: The answer is given below

Q: Distinguish between molecular substances and ionic substances in terms of their composition?

A: Ionic compounds have strong ionic bonds while molecular substances have covalent bonds. Molecular…

Q: Calculate the mass of 1.00 x 1024 (a septillion) molecules of water.

A: Given : Number of water molecules = 1.00 X 1024

Q: Would it be possible to determine the percentage of oxygen in NaCIO3?

A: The given compound is = NaCIO3 The percent of oxygen in this compound is =?

Q: Explain the concept of Mass spectrometry ?

A: Spectrometry is a practical approach of spectroscopy. It is an application of spectroscopy and deals…

Q: Which of the following are poor conductors of heat and electricity? O Transition elements O Halogens…

A: Elements can be classified into 3 forms, that is metals, non-metals, and metalloids. Metals are the…

Q: The mass ratio of sodium to fluorine in sodium fluoride is 1.21:1. A sample of sodium fluoride…

A: After the decomposition of sodium fluoride, the mass of fluorine produced is calculated by using the…

Q: How many grams of aluminum are there in 4.05 x 10²5 molecules of Al½O3?

A: Given:- number of molecules of Al2O3 = 4.05 × 1025 molecules  To calculate :- mass of Al in grams

Q: What is the mass, in grams, of 2.08 × 1024 aluminum (Al) atoms?

A: The question is based on mole concept. We have to determine mass of aluminium present.

Q: The number of copper atoms in a 3.0 g lump of copper is 2.8 x 10^22,how many electrons are pesent in…

A:

Q: What percentage of the mass of a phosphorus 32 atom is contributed by its electrons, given the mass…

A: Phosphorus-32 has 15 electrons. Mass of electrons in Phosphorus-32 can be calculated as follows,…

Q: What is a proton ? what is a chemical?

A: A proton is a subatomic particle which is present in the nucleus of an atom along with the neutrons.…

Q: 2. In a chemical atomic mass determination, the tin content of 3.7692 g of SnCl4 was found to be…

A: In SnCl4 one Sn atom combine with 4 chlorine atom. Given mass of SnCl4 is 3.7692 g and mass of Sn is…

Q: How many atoms of O are found in 1.00 x 10 2 g of K 2Cr 2O 7 ?

A: Number of atoms of Oxygen present in the given compound can be calculated as -

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

A:

Q: a) Which two of the following are isotopes of the same element:3116X, 3115X, 3216X? (b) What is the…

A: Two or more elements with identical atomic number but with different atomic mass are called…

Q: What is the mass in grams of 2.00 × 105 atoms of naturally occurring neon?

A: Given : Number of atoms of neon i.e Ne = 2.00 X 105 atoms.

Q: With the advent of techniques such as scanning tunneling microscopy, it is now possible to “write”…

A: Given:Surface is 20 atoms high and 14 atoms wide.Number of Platinum atoms = 20 atoms × 14 atoms =…

Q: Calculate the number of atoms in a 2.92 x103 g sample of boron.

A: Firat calculate number of moles.

Q: What is the molar mass of the compound with the formula X2Y2Z7, where X is an alkali metal from the…

A: Given: The compound with the molecular formula, X2Y2Z7, X= alkali metal from the 3rd period. Y= an…

Q: (a) Atoms are very small compared to objects on the macroscopic scale. The radius of a vanadium atom…

A: (a)Calculate the radius of vanadium atom in centimeters and meters:

Q: You have 3.31 L of water that contains 25 mg/L of PO43-. What is the total amount of phosphate in…

A: • The values provided in the question are:-    i) Density of phosphate ion solution,d  = 25 mg/L…

Q: Given that 4NH3 + 5024NO+ 6H2O, if1.92 X 10 molecules NH were made to react with an excess of oxygen…

A: Given,  4NH3 + 5O2 ➝ 4NO + 6H2O Number of molecules of NH3 react = 1.92 × 1021 molecules Excess…

Q: What chemical test(s) could you use to distinguish solid barium chloride from solid barium sulfate?

A: The barium Chloride is Soluble in water . The barium sulfate is not Soluble in water . By using the…

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: If there are 8.59 x 1022 molecules of NaCl in a salt shaker, what is the mass of NaCl?

A:

Q: How many electrons is the element Strontium (Sr) likely to gain or lose?

A: Strontium is represented by Sr. The atomic number of Sr is 38. Sr Electronic configuration = [Kr]…

Q: What is the % mass of oxygen in citric acid, C6H807?

A:

Q: 7. What is the mass in grams, of Vitamin C (C6H8O6) that contains 1.076 grams of carbon?

A: Given mass of Carbon = 1.076 g Molar mass of Carbon = 12.01 g/mol Molar mass of C6H8O6 = 176.12…

Q: 2. The volume of the nucleus of a carbon atom is about 9.9 x 10-39 mL. The molar mass of carbon…

A: Given: Volume of carbon nucleus atom = 9.9 × 10-39 mL. And molar mass of a carbon atom = 12.00…

Q: A block of gold (Au) has the dimensions (I × b x h) = 0.7600 in x 8.558 mm x 1.816 cm. 1 in = 2.54…

A:

Q: The mass ratio of sodium to fluorine in sodium fluoride is 1.21:1. A sample of sodium fluoride…

A: The amount of sodium produced on decomposition of sample NaF is 28.8g. The mass ratio of sodium to…

Q: The anticancer drug Platinol (Cisplatin), Pt(NH₃)₂Cl₂,reacts with the cancer cell’s DNA and…

A: The amount of a particular compound present in a solution is expressed by the various concentration…

Q: (a) Which two of the following are isotopes of the same element:3116X, 3115X, 3216X? (b) What is the…

A: (a)  31 16X and 3216X are the isotopes of the same element .

Q: What is the molecular weight of sugar, C6H12O6 in atomic mass units? And If you had one mole of…

A:

Q: 6. How many hydrogen atoms are there in 0.75 mol of C,H10O?

A:

Q: If a row of approximately 5.0 x 107 atoms measured 1.0 cm, how long would a row of 6.02 × 1023 atoms…

A: Given is row of atoms, 1.0 cm = 5.0×107 atoms 6.02×1023 atoms = ?

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

A:

Q: Given that you had 1 mol glucose (C 6H 12O 6), what would the mole ratio of glucose to oxygen be?

A: Balance Chemical equation means number of atoms or ions should be equal in both side (reactant and…

Q: Boron, atomic number 5, occurs naturally as two isotopes, 10B and 11B, with natural abundances of…

A: Isotopes are elements with the same number of protons but differ in the number of neutrons. The…

Q: How many grams of magnesium would you expect to find in 56.8g of magnesium nitrate?

A: Given : Mass of magnesium nitrate i.e Mg(NO3)2 = 56.8 g

Q: 9. Explain how the atomic mass unit (amu) is defined and explain how the definition of an amu, in…

A: amu i.e atomic mass unit is the unit used to express mass .  Avogadro's number = 6.0221 × 1023

Q: What would be the mass, in kilograms, of a block of graphite consisting of 1.55 x 1026 carbon atoms?

A: