What is the mass of a sodium nitride sample,NA3N, which contains 9.76*1012 atoms of sodium?

Q: How many sulfur atoms are there in 3.8 mol of sulfur?

A: 1 mole of any substance consists of 6.022 x 1023 atoms of that substance.Similarly, 1 mole of sulfur…

Q: How many total atoms are there in seven dozen molecules of nitric acid, HNO3?

A: Answer to question no. 5 (as mentioned); 1 molecule of nitric acid HNO3 contains 5 atoms ( 1 H, 1N,…

Q: You gave 4.5 × 1025 aluminum atoms . How many moles of aluminum atoms do you have?

A:

Q: Naturally occurring copper consists of 63Cu (mass 62.9296 amu) and 65Cu (mass 64.9278 amu), with an…

A:

Q: A 10.5710.57 g sample of NaBr contains 22.3422.34% Na by mass. Considering the law of constant…

A: According to law of constant composition, the mass percent of any element in any compound always…

Q: How many grams of Li are there in a sample of Li that contains 3.58×1023 atoms? grams

A: Number of Li atoms (n) = 3.58×1023 Avogadro's constant (N) = 6.023×1023 Molar mass of Li = 6.94…

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: How many Atoms are there in C6H12O6 ?

A: Atoms are the basic building blocks of all matter. They can combine to form molecules, whose…

Q: The atomic weight of bromine is 79.904, yet no atom of bromine weighs 79.904 amu. Why is this true?

A: Given : The atomic weight of bromine is 79.904, yet no atom of bromine weighs 79.904 amu.

Q: The chemical formula for calcium bicarbonate is: Ca(HCO,), Са How many carbon atoms are in each…

A:

Q: How many atoms are in 3.72 moles of pure aluminum?

A: Given: moles of Al = 3.72 mol

Q: Calculate the mass of carbon in a 1-carat diamond that contains 7.56×10^22 atoms of carbon.

A: Since moles = number of atoms / Avogadro number Avogadro number = 6.022 X 1023  => moles of…

Q: What is the mass of a sample of aluminum that has the same number of atoms that are in 20.0 g of…

A: The value is given as follows:

Q: 3.127 Platinum forms two different compounds with chlorine.One contains 26.7 percent Cl by mass, and…

A: The empirical formulas for the two compounds of platinum chloride has to be determined. Given data…

Q: A sample of Fe(H2PO4)3 that contains 12 000 oxygen atoms must also contain how many phosphorus…

A: Given Number of oxygen atoms = 12000 To find number of phosphorus atoms

Q: Rubidium has two naturally occurring isotopes. The average mass of Rb is 85.4678 u. If 72.15% of Rb…

A: Given, Average mass of Rb = 85.4678 u Isotope I, Rb-85 : natural abundance = 72.15 %  relative…

Q: Rubudium have two isotopes, 85Rb has mass 84.9117 amu and 87Rb has mass 86.905 amu. If the average…

A: The naturally occurring Rubidium  has two isotopes, therefore both of them are present in Rubidium…

Q: How many grams of Mg are there in a sample of Mg that contains 6.21x1023 atoms? grams

A: The amount of Mg present can be calculated as

Q: oxygen atoms

A:

Q: How many atoms of sulfur are in 0.78 grams of Sulfur?

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: 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 grams of K2C2O4, potassium oxalate, would containe 182 grams of pure potassium?

A: The molar mass of potassium oxalate can be calculated as:

Q: A 67.2 g sample of a gold and palladium alloy contains 3.33*10^23 atoms.  a) What is the mass % of…

A: Given data,Mass of alloy=67.2gTotal number of atoms=3.33×1023atoms

Q: A toy top has a mass of 32.0Cu. How many atoms Сu are in this spinning top, given that the average…

A: One mole of any substance consists of 6.022×1023 particles.Number of moles of any substance present…

Q: (a) What is the mass in amu of a carbon-12 atom? (b) Why is the atomic weight of carbon reported as…

A: Carbon is an element having atomic number 6. It belongs to 14th group and 2nd period. The valency of…

Q: How many Chlorine atoms are there in phosgene?

A: Phosgene is a colorless gas having molar mass equals to 98.92 g/mol. It is a suffocating gas.

Q: How many atoms are there in 89 molecules of acetic acid?

A: The chemical formula of acetic acid is CH3COOH.

Q: What is the mass of 5.83 ×1017 molecules of liquid propane, C3H8?

A: Given, Number of molecules of C3H8 = 5.83 x 1017  Molar mass of C3H8 = 44.1 g/mol First, we find the…

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: How many grams of Zn are there in a sample of Zn that contains 4.33x1023 atoms? grams

A: Using molar mass of Zn, grams of Zn present in a sample of Zn can be calculated.

Q: A sample of glucose, C6H12O6, contains 1.240×1021 carbon atoms. How many atoms of hydrogen does it…

A:

Q: A gold ring contains 3.01 x 1023 atoms of gold, Au. How many grams of gold are in the ring?

A: The number of moles (n) of a substance is calculated by dividing its number of atoms (No) by…

Q: If a penny is made of 3.11 grams of copper, how many atoms of copper are there in the penny?…

A:

Q: Q2. A compound of copper and sulfur contains 111.99 g of metal and 113.04 g of nonmetal. How many of…

A: • Here is given that, a compound contains copper and sulfur atoms . • And we know that, copper is a…

Q: The chemical formula for calcium bicarbonate is: Ca(HCO,), How many carbon atoms are in each formula…

A: Chemical formula represents each compound with a symbol for each element present in it followed by a…

Q: the mass of Ammonium nitrate, NH4NO3?

A: Molar mass of a molecule = sum of atomic masses of all the constituent elements.

Q: How many grams of He are there in a sample of He that contains 8.76x1023 atoms? grams

A:

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: If the exact mass for an unknown compound is 99.0684 amu, which of the following is the correct…

A: Molar masses of the atoms constituting the given compounds are as follows:- Molar mass of Carbon…

Q: The mass of a single aluminum atom is 4.48×1023 grams. How many aluminum atoms would there be in 185…

A: Given that, The mass of a single aluminum atom is 4.48×10-23grams = (4.48×10-23×103)milligrams =…

Q: How Many atoms are there in 1.4532 mole of copper?

A:

Q: How many grams of He are there in a sample of He that contains 5.06×1023 atoms? grams

A: 1- First calculate the number of moles of He atoms :  We know that,  Number of moles = [ number of…

Q: g) How many grams of K2C2O4, potassium oxalate, would contain 182 grams of pure potassium?

A: One mole of K2C2O4 has two moles of potassium.   The molar mass of K2C2O4 is 166.22 g/mol   And…

Q: A sample of aluminum foil contains 5.70 x 1023 atoms. What is the mass of the foil?

A:

Q: Since 1983, pennies have been made with zinc and plated with copper. Prior to 1983, pennies were…

A: Since from 1793-1837 pennies were made up of pure copper therefore, if you had a penny from 1800…

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: How many grams of Co are there in a sample of Co that contains 9.57×1023 atoms? grams

A: 1 mole of any atom corresponds to Avagadro's number i.e. 6.023 x 1023 atoms. Therefore, Cobalt (Co)…

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.