What is the mass in grams of each quantity of vitamin D (molar mass 384.7 g/mol), which is needed for forming and maintaining healthy bones? a. 3.6 mol c. 7.3 × 10 24 molecules b. 0.58 mold. 6.56 × 10 22 molecules

Q: There are many minerals which contain silver. A 2.22 g sample of one of these, matildite, is placed…

A: The reaction between silve and magnesium chloride for analysis of Ag in matildite . 2 Ag + MgCl2 → 2…

Q: For the chemical reaction: Fe(NO3)2 + 2 КОН 2 KNO3 + Fe(ОН)2 Which of the following is the correct…

A: Given  Number of mole of Fe(NO3)2  = 3.10 mole mass of potassium nitrate     = ?

Q: What mass of carbon dioxide can be absorbed by 40.8 grams of lithium hydroxide?

A: Given :- mass of LiOH = 40.8 g To calculate :- mass of CO2 absorbed

Q: ow many fluorine atoms would it take to make up a mass of2.83×10—22 g?   25 atoms    None of the…

A: Given data, Mass of F = 2.83 x 10-22g Data taken from google; Molar mass of F = 18.998 g/mol

Q: What is the mass in grams of 0.375 mole diatomic chlorine?     13.3 g     0.0134 g     2.26 x…

A: Moles of component is defined as ratio of the given mass to the molar mass. The relation for the…

Q: How many moles of potassium ions are in 360. g alum?    (b) What is the mass % S in alum (to 3…

A:

Q: 8. A sample of a compound contains 15.60 g Mg and 10.27 g O. How many g Mg are in another sample of…

A: In the sample of magnesium oxide the amount of magnesium and oxygen is as follows: Mass of Mg =…

Q: In this quantity of gold? [4.5 9. 64,456 g/mol) in A 55kg woman has 7.5 x 10-3 mol of hemoglobin…

A: The given data contains,  =7.5 ×10-3According to mole concept,1 mole of compound contains 6.022…

Q: How many chlorine atoms are present in 9.7 grams ICl3? (6.022 x 1023)

A:

Q: rtobstodafo I nominoq В. Determination of NaCl 86.096 1. Mass of evaporating dish #2, watch glass,…

A:

Q: What is the molar mass of ibuprofen, C13H18O2? A) 206.3 g/mol B) 289.4 g/mol C) 29.0 g/mol D)…

A: Molar mass of C = 12.01 g/mol  Molar mass of H = 1.008 g/mol  Molar mass of O = 16.00 g/mol

Q: 100.0 g lead(II) nitrate is reacted with 50.00 g potassium iodide (in plenty of water). How many…

A: The chemical equation for the reaction between lead(II) nitrate and potassium iodide is given as -…

Q: The chemical formula for octane is: CH;(CH,),CH, Calculate the molar mass of octane. Round your…

A: To calculate the molar mass of octane.

Q: Ammonia, NH3, can be synthesized by this reaction:

A: Given,  Amount of NO is 45.8 g Amount of H2 is 12.4 g Formula Used,

Q: For the following reaction, 15.2 grams of nitrogen monoxide are allowed to react with 5.95 grams of…

A: This problem is based on stoichiometry. We have to first determine the limiting reagent and then…

Q: What is the mass in milligrams of? (a) 0.367 mol of HNO3? (b) 245 mmol of MgO? (c) 12.5 mol of…

A:

Q: A sample of nickel silver contains 18.0% nickel by mass. What mass of nickel silver must be melted…

A: Given: Sample of Nickel Silver contains: 18% Nickel by mass.

Q: Mass of Zn 2.44 g Mass of Cu 0.063 g The mass of Zn and the mass of Cu in a coin are given in the…

A:

Q: How many atoms are in the 156 mL of ethanol? (density = 0.79 g/mL) (Molar mass: 46.07 g/mol)…

A: The molecules that present inside any substance can be determined by calculating the number of…

Q: How many moles of atoms are present in 154 g of HCl?   A) 4.22 mol B) 8.45 mol C) 0.0270 mol D) 2.00…

A: Given  Mass of HCl = 154 gram  Number of mole of atom = ?

Q: 15. A 50.0 g sample of magnesium hydroxide is mixed with 70.0 grams of phosphoric acid. If the…

A: We have to find percent yield

Q: Pheromones are a special type of compound secreted by the females of many insect species to attract…

A: Molar mass of pheromone = 282 g/mol Mass of pheromone = 1.5 x 10-12 g

Q: A 15-g sample of lithium is reacted with 15 g of fluorine to form lithium fluoride: 2Li + F2 →…

A: First convert mass into mole by diving molar mass respectively Then Calculate limiting reagent by…

Q: Consider the mixture of Cl2 and F2 in a closed container as illustrated below. What will the…

A: The reaction taking place is given as, => Cl2(g) + 3 F2(g) → 2 ClF3(g)

Q: what is the number of moles of calcium carbonate reacted?

A:

Q: 27.Formaldehyde has the formula CH₂O. How many molecules are there in 0.11 g of formaldehyde? A) 6.1…

A: Given :  Mass of formaldehyde = 0.11 g

Q: 1. What do you call to the unit amount of a substance used for measuring large quantities of very…

A: Given:  unit amount of  substance used for measuring large quantities of very small entities such as…

Q: Cinnamic alcohol is used mainly in perfumery, particularly in soaps and cosmetics. Its molecular…

A: Given, Molecular formula of Cinnamic alcohol is C9H10O  Mass of sample = 0.668 g     Required,…

Q: Ocean water is 3.5 % NaCI by mass. How much NaCl will be obtained from a 266 mL sample of sea water…

A: The mass of solute in gram present in 100 g solution is known as the mass percent concentration of a…

Q: Consider a 10.1 g sample of the compound cesium phosphate. a) What is the chemical formula for…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: Balance each of the chemical equations. Fe(s) + 02(g) → Fe203(s) _Na3PO4(aq) _NH4NO3(s) – а. b.…

A: In a balanced chemical reaction the number of atoms of each element is same on both the reactants…

Q: How many moles of atoms are contained in the following? (a) 25.0 g NaOH                  (b) 44.0…

A: Mass of NaOH = 25.0 grams Molar mass of NaOH = Atomic Mass of Na + Atomic Mass of O + Atomic Mass of…

Q: Given 70 g of Cl2,  how many particles of Br2 is produced? Cl2 + 2KBr → 2KCl + Br2

A: The number of particals of Br2 are calculated as :

Q: Two hypothetical ionic compounds are discovered with the chemical formulas XCI2 and YCI2, where X…

A:

Q: 9. How many grams of nitrogen dioxide NO2 are present in 2.00 mol of nitrogen dioxide? A) 0.8452…

A:

Q: Iron is found in Earth's crust as several iron compounds: Calculate the mass (in kg) of each…

A:

Q: 1. Measured Mass of CuSO4:5H2O 12.249 g 2. Molar mass of CUSO4-5H2O g/mol

A: The molar mass of CuSO4.5H2O = 63.546 + 32.065 + 15.9994*4 + 5*(1.00794*2 + 15.9994) =249.685g/mol

Q: The number of hydrogen atoms in 0.500g of glucose (C6H12O6) is a. 12 b. 1.67x1021 c. 2.78x10-3 d.…

A:

Q: One molecule of an unknown compound is found to have a mass of  4.61 x 10-22 g. What is the molar…

A:

Q: Which of the following contains the greatest number of molecules? A. 1 g of CH3CI В. 1 g of CH,Cl2…

A:

Q: A) How many grams of Mgl2 is present in a 0.4745 g sample that is 53.21% Mgl2 (278.11 g/mol)? B)…

A:

Q: 6HCl + 2Fe ---> 3H2 + 2FeCl3 8.00 g of HCl is mixed with 4.00 g of Fe, as the reaction goes to…

A: Given: Mass of HCl = 8.00 g Mass of Fe = 4.00 g Molar mass of HCl = 36.46 g/mol Molar mass of Fe =…

Q: How many molecules are contained in a glass that holds 490 g of water? How many moles does that…

A: Given, water is contained in a glass. and amount of water is =490 gwe are asked to calculate, the…

Q: What is the mass of 2.00 mol of chlorotrifluoromethane?     52.1 g     209 g     104 g…

A: Given,  Moles of chlorotrifluoromethane = 2.00 mol.  The mass of chlorotrifluoromethane is:

Q: The formula for boron trichloride is BCl3. A. How many molecules are in 9.31 grams of boron…

A: Molecular formula of Boron trichloride is BCl3. It has three Chlorine atom and one boron atom. Molar…

Q: Use the chemical equation and the table to answer the question. Pb(NO3)2(aq) + 2KBr(aq) → PbBr2(s)…

A:

Q: ) How many grams of MgI2 is present in a 0.4745 g sample that is 53.21% MgI2 (278.11 g/mol)? B)…

A: Weight of sample = 0.4745 gm (w/w)% = 53.21 % Molar mass of MgI2 = 278.11 g/mole Molar mass of AgI =…

Q: How many atoms of C are present in 22.3 g of C?

A:

Q: 25.If 0.274 moles of a substance weighs 62.5 g, what is the molar mass of the substance, in units of…

A: Given data Moles of substance = 0.274 mol weight of substance = 62.5 g find out the molar mass of…

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.