how many electrons are present in 2g of oxygen?

Q: How many  electrons are in chlorine Cl.

A: The atomic number of an element tells the number of electrons in it. The atomic number of chlorine…

Q: The density of helium in a balloon is 1.18 g/L. If a balloon holds 2.89 L of He, how many atoms of…

A: Since mass of He = density X volume  density of He = 1.18 g/L Volume of balloon = 2.89 L => mass…

Q: Determine the number of atoms in 11.0 grams of nickel, Ni.

A: Given- Weight = 11.0 gm

Q: What is the mass of 100 platinum atoms?

A: Atomic mass, the amount of matter found in the element atom. It is expressed as a multiple of…

Q: What is the mass of 4.34  1027 hydrogen molecules?

A: Given: Number of hydrogen molecules =

Q: Determine the number of atoms in a 1.00 mg sample of Carbon-14?

A:

Q: Calculate the number of atoms in sample. 2.26 g Hg

A:

Q: Determine the number of N atoms in a sample of C7H5(NO2)3 that has the same number of O atoms as…

A:

Q: what is the mass of 4.50 × 1025 O3 molecules?

A: Mole can be defined as a standard unit for measuring large quantities of very small entities such as…

Q: What do you mean by Carbon atoms ?

A: Step 1: An atom is the smallest component of the element that has the chemical properties of the…

Q: 2. How many Sulfur atoms would be present in 32.5 moles of Sulfur?

A: Here,  Questions given moles and apply the value of Na , calculate the no of atom Na value is…

Q: how many atoms are in 1.65 moles of titanium

A: Number of atoms, ions and molecules present on a given amount can be determined by “Mole Concept”.…

Q: What is the total number of atoms in a 30.0 gram sample of neon

A:

Q: A sample of trifluoroacetic acid, C2HF3O2, contains 32.1 g of oxygen. Calculate the mass of the…

A: Given,  Mass of O in a sample of C2HF3O2 = 32.1 g Calculate the mass of C2HF3O2 sample = ?

Q: b) Calculate the mass of oxygen in a 89.2 g sample of calcium phosphate.

A: Since you have asked for part b only, we are providing you a solution for part b of the question.…

Q: Determine the number of each type of atom in formula. Ca(OH)2

A: Calcium hydroxide is an inorganic compound. The molecular formula of this compound is Ca(OH)2. The…

Q: The total number of atoms in NaCI

A: The number of atom of an element in its molecules is known as atomicity. SodiumChloride or NaCl is…

Q: (Uf a gas) Explain the difference between the atomic mass of chlorine and the formula mass of…

A: An atomic mass is defined as the average atomic mass of atoms present in an element.

Q: Determine the number of atoms that would make up a 78.8 g sample of Tellurium.

A:

Q: O3

A:

Q: Signature of a person increased the mass of paper by 1.2 grams with lead pencil. How many atoms of…

A: Given that Mass of C=1.2gram Molar mass of C=12g/mol No. of atoms of C=?

Q: How many atoms does hydrogen have

A: Calculate no. of  atom in hydrogen=?

Q: How many grams of Platinum (Pt) contain the same number of atoms as 5.0g of lithium (Li)

A:

Q: How many moles of aluminum do 3.7x10^24 aluminum atoms represent?

A: The number of units (maybe atoms, electrons, or ions) present in 1 mole of any substance is…

Q: How many moles of aluminum are required to c

A:

Q: How many grams of oxygen are combined with 94 grams of iron to make the iron(II) oxide compound?

A: Given: Oxygen is combined with iron to give iron(II) oxide. Mass of iron = 94 grams.

Q: How many atoms of Xe does 7.84 moles of Xe contain?

A: 1 mole = 6.022×1023 [ Avogadro's number ] If any element has 6.022×1023 atoms , it is said to have 1…

Q: The total number of atoms in CI2

A: Atom are the smallest unit of the chemical species. The total number of atom present in the…

Q: 22. As in question 21 determine the mass % of N (nitrogen atoms) in ammonia (NH3), urea (CHẠN2O) and…

A: Mass percent is the mass of the element divided by the mass of the compound or solute.

Q: A modern penny weighs 2.5 g but is only 2.52% copper by mass. Calculate the number of cooper atoms…

A: given values :  mass of penny = 2.5 g mass % of copper = 2.52% formula of mass % : mass % = mass of…

Q: 0. How many grams of platinum contain the same number of atoms as 49.5g of mercury?

A: Applying mole concept and number of atoms.

Q: What is the atomic weight of Nitrogen?

A: Given Nitrogen Atom. We need to determine the atomic weight of Nitrogen.

Q: What is the atomic weight of the element chlorine?

A: Average atomic weight of chlorine element is 35.5 amu. Chlorine atom has two isotopes Cl35 and Cl37…

Q: How many grams of lithium will combine with 24.0 g of sulfur to form the compound LizS?

A:

Q: How many grams of lithium will combine with 27.9 g of sulfur to form the compound Li2S?

A:

Q: What is the chemical formula of hydrogen

A: To find: Chemical formula of hydrogen

Q: How many gold atoms are in a 0.277 ounce, 18 K gold bracelet?(18 K gold is 75% gold by mass)

A: The number of gold atoms in 0.277 ounce, 18K gold bracelet are to be calculated, where 18K gold is…

Q: How many lithium atoms are contained in 3.6 g sample of lithium?

A: First to convert 3.6 g to the moles. Multiply 3.6 g by the molar mass of lithium. No of atoms for…

Q: Calculate the approximate number of atoms in a bacterium, assuming the average mass of an atom is…

A: Given,  Average mass of an atom is 10 times the mass of hydrogen atom Calculate the approximate…

Q: How many atoms are in 15.6 grams of silicon?

A:

Q: Determine the number of each type of atom in formula. BaCl2

A: Given: BaCl2

Q: How many grams of lithium will combine with 21.3 g of sulfur to form the compound Li2S?

A: Given, mass of S = 21.3 g  Mass of Li2S = ?

Q: Determine the number of each type of atom in formula. Al(NO3)3

A: Given formula: Al(NO3)3 The number of atoms of an element in a formula is same as its subscript. In…

Q: How many moles of atoms are contained in 4.5 × 10 power 22 atoms of copper

A: Given information:Number of copper atoms = 4.5×1022

Q: How many atoms of calcium are contained in 112.0 grams of calcium?

A: Given :-  mass of calcium = 112.0 g  To calculate :-  total number of calcium atoms present in the…

Q: A 3.6 g sample of lithium contains how many atoms?

A: Since moles = mass / molar mass  Given : mass of Li i.e lithium = 3.6 g And since molar mass of Li =…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.