In small amounts, the fluoride ion prevents tooth decay. The average adult should consume 3.0mg of fluorine per day. Calculate the amount of sodium fluoride (45.24% F) that an adult should consume to get the recommended amount of fluorine.

Q: Calculate the mass % of 2.50 g Na3PO4 + 10.0 g H2O

A:

Q: 1. Calculate the mass in grams of a single oxygen molecule, 02.

A: Molar mass of O2 is 32.0 g/mol  We have to calculate here mass of 1 molecule of oxygen i.e. O2

Q: A container has 5.80 x 1023 molecules (aka atoms) of bromine gas. Calculate the mass (in g) of…

A: Bromine gas = Br2 Molar mass of Diatomic  Br2 gas = 159.808 g/mol 6.022 x 1023 molecules mass =…

Q: A Sample of pure Calcium fiuoride With a mass of 15.0g Contains 1.709 of calcium. How much calcium…

A: This question can be solved using proportion method as:

Q: Identify the choice that best completes the statement or answers the question. Analysis of a…

A: According to law of constant proportion, the ratio of mass of elements in any fixed compound will…

Q: Calculate the mass (in g) of each sample.  5.73x10^20 SO3 molecules

A: Given:Number of molecules = 5.73x1020 molecules.Molar mass of SO3 = 80 g/mol.

Q: a 2.558 g sample of sodium carbonate hydrate was heated to drive off the water resulting in 0.948 g…

A: The substance which contains water or its constitute element is known as hydrate.

Q: How many molecules are in each sample? a. 6.5 g H,0 b. 389 g CBr, c. 22.1 g O, d. 19.3 gC,H10

A: a) 2.5g H2O = Mass of H2O = 6.5g Molar mass of H2O = 18g/mol The number of molecules can be…

Q: How many molecules are in one drop of water if 1.00 g of water contains 3.34 × 10 ²² molecules?…

A: 1 gm is equal to 1 mL. Given 1mL=20 drops.

Q: A tube of toothpaste contains 0.76 g of sodium monofluorophosphate (Na2PO3F) in 100 mL.(a) What mass…

A:

Q: A 10 gram sample of NaCl will have the same percent composition (percent by mass) of Na and Cl than…

A:

Q: If a fertilizer contains 14.0% nitrogen by mass, how many grams of nitrogen are in 4.15 kg of…

A: fertilizer contains of 14.0% nitrogen  mass of nitrogen = 4.15 kg  We have calculate the how many…

Q: What amount, in moles, does this mass represent?

A: Number of moles = mass/molar mass  Molar mass of methanol is 32.04 g/mol

Q: Potassium dichromate, K2Cr2O7, is used in tanning leather, decorating porcelain, and waterproofing…

A: Given: Mass of K2Cr2O7 = 43.06 g.

Q: A type of steel used for bicycle frames contain 5g of manganese in every 400 g of steel. How much…

A: Given: Mass of manganese in 400 g of steel = 5 g And total mass of steel in bicycle = 2200 g

Q: Diamond is one form of elemental carbon. An engagement ring contains a diamond weighing 1.25 carats…

A: The mass of 1.0 g is equal to 1000 mg. The mass of diamond in g is calculated as shown below.

Q: Caffeine, a stimulant found in coffee and soda, has the mass percent composition: C, 49.48%; H,…

A: GIVEN: The mass % of carbon= 49.48% The mass % of hydrogen=5.19% The mass % of nitrogen=28.85% The…

Q: Calculate the number of nitrogen atoms in a 70.0 g sample of dinitrogen tetroxide (N,0.).

A: Given :- mass of N2O4 = 70.0 g  To calculate :- number of nitrogen atoms

Q: Calculate the mass, in grams, of 1.751.75 mol of neon, NeNe.   mass of NeNe:…

A: The mass of 1.75 mol of neon is calculated as,

Q: H,O, + HgO - H,0 + 0,+ Hg How many atoms of H,0, are in 5.36 x 102 atoms of HgO?

A: Given, the chemical reaction as follows,H2O2+HgO→H2O+O2+Hgnumber of atoms of HgO =5.36×1022 atomswe…

Q: Estrogen (estriol) is a steroid that has the formula C18H2403. What is the mass of carbon in a 50.0…

A: Given:  Molecular formula of estrogen= C18H24O3  Mass of estrogen given= 50g

Q: How many hydrogen atoms are in 23.7 g of water

A:

Q: Find the number of Na' ions in 2.92 g of NaPO,

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

Q: 1. How many grams of C are present in 3.05 grams of carbon tetrabromide ? grams C.

A:

Q: 4) Vitamin B3, also known as niacin, helps maintain the normal function of the skin, nerves, and…

A: To calculate the mass of niacin which consists of an equivalent number of moles as 100 mg of…

Q: The iodide ion is a dietary mineral essential to good nutrition. In countries where potassium iodide…

A: Mass percent composition of I is 76.45% Mass of I intake is 150 mg per day.

Q: An aspirin tablet contains 81.0  mg of aspirin, which has the molecular formula, C9H8O4. How many…

A: The molar mass of aspirin is 180.16 g/mol. The amount of aspirin in the units of mol in 81.0 mg of…

Q: The waters of the oceans contain many elements in trace amounts. Rubidium, for example, is present…

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

Q: In one of your experiments, you made magnesium oxide by burning magnesium in the air. How much Mg is…

A: Magnesium reacts with oxygen to make a compound called magnesium oxide. The bright light results…

Q: 1. How many grams of N are present in 2.82 grams of nitrogen trifluoride ? grams N.

A: According to guidelines i can answer only first question, please repost the other questions.   Given…

Q: How many sodium ions are in 125g of NA2SO4

A: In chemistry, number of moles refers to a unit of amount. It can also be defined as the mass of a…

Q: A chemist decomposes samples of several compounds; the masses of their constituent elements are…

A: Empirical formula is the simplest ratio of the elements present in the given molecular formula.…

Q: Calculate the number of atoms of iodine in a 5.25×106 g5.25×106 g sample of iodine.

A: Mole is the amount of the substance that contains the same number of particles or atoms or…

Q: 55: A sugar crystal contains approximately 1.8*107 sucrose (C12H22011) molecules. What is its mass…

A: To calculate the mass from molecules, we need to calculate the number of moles of a substance in the…

Q: A drop of water has a volume of approximately 0.05 mL. How many water molecules does it contain? The…

A: Density of a substance is equal to the mass of the substance divided by its volume. Write the…

Q: Calculate the mass of 1.00 × 1024 (a septillion) molecules of water. Express the answer numerically…

A:

Q: A sample of trifluoroacetic acid, C,HF,02, contains 25.3 g of fluorine. Calculate the mass of the…

A: One molecule of C2HF3O2 contains 2 atoms of carbon, 1 atom of hydrogen, 3 atoms of fluorine and two…

Q: The iodide ion is a dietary mineral essential to good nutrition. In countries where potassium iodide…

A: 100 mg of Potassium iodide contain = 76.45 mg. of iodine Daily recommendation = 150 mg.

Q: A 43.0 g sample of hydrated cobalt (II) sulfite is heated resulting in anhydrous cobalt (II) sulfite…

A: We have given that   A 43.0 g sample of hydrated cobalt (II) sulfite is heated resulting in…

Q: A 10 gram sample of NaCl will have the same percent composition (percent by mass) of Na and Cl than…

A:

Q: Bituminous coal is a type of coal that is composed of carbon with small amounts of hydrogen, oxygen,…

A: Chemical formula of Bituminous coal is C137H97O9NS Molar mass of Bituminous coal…

Q: Hydrogen peroxide (H2O2) is a mild antiseptic used to prevent infection in minor cuts and scrapes.…

A:

Q: A chemist decomposes samples of several compounds; the masses of their constituent elements are…

A: Empirical formula is the simplest ratio of the elements present in the given molecular formula.…

Q: formula of the hydrate

A: When a hydrous salt is heated, it loses the water of crystallization. Water of crystallization =…

Q: Write the chemical formula for each compound, and then calculate the amount in moles in each sample.…

A:

Q: To prevent the presence of air, noble gases are placed over highly reactive to act as inert…

A: The partial pressure of a gas in a mixture of gases is equal to the total pressure multiplied by the…

Q: What is the amount of Na+ (mm: 23 g/mol) in grams that is found in 2.92 g of N23PO4 (mm: 163.94…

A: Given Data :  1. Mass of Na3PO4 = 2.92 g  2. Molar mass of Na+ = 23 g/mol  3. Molar Mass of Na3PO4 =…

Q: 3. Elements B and N form a binary compound BNy When 12 grams of this compound was made from its…

A: Mass of compound = 12 g  Mass of nitrogen = 7 g  We need to determine formula of compound.

Q: Calculate the mass in grams of the following sample: 8.75x10^-2 moles of lead

A: Given: Moles of lead (Pb) = 8.75 × 10-2 = 0.0875 moles. Molar mass of lead (Pb) = 207.2 g/mol We…

Q: Calculate the mass of 1.00×10241.00×1024 (a septillion) molecules of wate

A: We know that there are two hydrogen atoms and one oxygen atom for every H20 molecule. So, the molar…

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.