If you have a 25% Ca in calcium fluoride, what is the mass of Ca if you have 2.40 g of calcium fluoride?

Q: It is estimated that we breathe around 5.0 x 1021 molecules of 0, in a single breath. What mass of…

A: Given: Molecules of O2 in a single breath = 5.0 × 1021. Molar mass of O2 = 32 g/mol

Q: What is the mass in grams of 7.54 x 1025 molecules of Br2?

A:

Q: What is the mass, in g, of 1.00 mol of helium atoms?

A: The mass in grams of 1.00 mol of helium atoms has to be given.

Q: A block of pure magnesium metal weighs 76.9 grams. How many moles of magnesium are present in the…

A: Mole= mass of Mg / molar mass of Mg Given - 1) mass of Mg =76.9              2) Molar mass of Mg=…

Q: 3.11  mL of seawater contains about 1.31×10-14  moles of gold, how many atoms of gold are in that…

A:

Q: a. How many ATOMS of boron are present in 7.41 grams of boron trichloride? 3.805x10^21 atoms of…

A: Molecule given = BCl3 1 molecule of BCl3 = 1×6.022 ×1023 Molar mass of BCl3 = 117.3 g/mol 117.3 g of…

Q: What is the mass of 9.19x10^24 molecules of nitrogen dioxide?

A: Given Molecules of nitrogen dioxide (NO2) = 9.19 × 1024 molecules

Q: What is the mass of 3.367 moles of Ca(OH)2?

A:

Q: If a sample of Fe2S3 contains 1.25x10^15 iron atoms what is the mass in grams ?

A:

Q: What is the mass, in grams, of 9.71×1024 molecules of methanol (CH3OH)?

A: Introduction :  We need to calculate mass in grams for CH3OH . First convert molecules into moles .

Q: The molecular weight of cholesterol is 386.65 g/mol. What is the mass of one molecule of…

A:

Q: In 1871, Mendeleev predicted the undiscovered element ekasilicon. In 1886, the element was…

A:

Q: What is the mass, in grams, of 0.0425 mol of iron(III) phosphate?

A:

Q: Find the mass (in grams) 7.7 X 10 molecules of NO,

A: Given :-  Number of molecules of NO2 = 7.7 x 1023 molecules  To calculate :- mass of NO2 in grams

Q: Cortisone consists of molecules, each of which contains 21 atoms of carbon (plus other atoms). The…

A: The given data: The number of carbon atoms present in cortisone = 21 The mass % of the carbon in…

Q: When 8.60 g of calcium are heated in air, 10.60 g of calcium nitride are formed. What is the…

A: We are given that 8.6 g of calcium is heated to produce 10.6 g of calcium nitride, the reaction can…

Q: If we want to make 2.5 moles of NH3, how many grams of nitrogen will we need?

A: The balanced chemical equation for the reaction that produces ammonia (NH3) from nitrogen (N2) and…

Q: A reaction between nitrogen and hydrogen forms ammonia (NH3). If 15.62 grams of nitrogen is reacted…

A:

Q: In a combination reaction, 1.60 g of lithium is mixed with 6.75 g of oxygen.   After the reaction…

A: Number of moles = Given massMolar mass

Q: A metal has the mass  of 12.00 g and 5.850 x 1022 atoms.  Calculate molar mass of the metal.

A: Formula use is, no of moles = weight/ molar mass

Q: you have 1.500 moles of an unknown metallic element. You go to the balance, and find that the mass…

A: Number of Moles of the Unknown Element = 1.500 moles Mass of the Element = 161.80 g   In order to…

Q: How many grams of carbon tetrachlorride are in 1.01 x 1024 molecules?

A: Given: Number of molecules= 1.01×1024  To find: Grams of carbon tetrachloride Formula: Number of…

Q: What is thé mass percentage of C in codeine, C18H21NO3? Provide an answer to two decimal places.

A: Given : We have to calculate mass percentage of carbon in codeine.

Q: . How many ATOMS of carbon are present in 9.01 grams of carbon tetrachloride ?

A: Number of moles = mass/molar mass  Molar mass of CCl4 = 153.82 g/mol  1 mol = 6.022 × 1023…

Q: A mixture of 197.1 g of P and 203.6 g of O, reacts completely to form PO, and P010: Find the masses…

A: Mass of O2 = 203.6 g * moles of O2 = Mass of O2 / Molar mass of O2 = 203.6 g / 32 (g/mol) = 6.36…

Q: What is the mass percent of silicon dioxide (SiO2) if you are able to separate 2.202g out of a…

A: The mass percentage of a compound in a mixture is equal to the ratio of the mass of that compound…

Q: What is the mass in grams of 2.13 x 1018 moles of Lithium?

A: Since, Moles is the ratio of mass to the molar mass of that atom or molecules. Thus,

Q: a certain protein has a molar mas of 2.88 x 10^5 g. what is the mass of the molecule of this protein

A: Given: Molar mass  of Protein = 2.88 x 105 g.  1 mole = 6.022 X 1023  molecules

Q: If you have 6 moles of Al(OH)3, how many moles of Cu(OH)3 will be produced?

A: Note : Formula for copperhydroxide is written wrong. Cu(OH)3 is wrong formula. Correct formula is…

Q: What is the mass, in grams, of 1.223 mol of iron(III)sulfate?

A: Number of moles of a substance is equal to the mass of substance divided by its molar mass. Write…

Q: 2. Iron reacts with chlorine gas to form iron(II) chloride: 2 Fe(s) + 3 Cl₂(g) →→2 FeCl,(s) What…

A: Two mole of iron react with three mole of Cl2 and produced two mole of FeCl3

Q: Elemental phosphorus occurs as tetratomic molecules, P4. What mass of chlorine gas is needed to…

A: Given that  Elemental phosphorus occurs as tetratomic molecules, P4 The mass of chlorine gas is…

Q: What is the mass in grams of 1.47 x 1015 molecules of NO?

A: Given : The number of molecules of NO=1.47 x 1015 The molar mass of NO=30.01 g/mol 30.01 g is the…

Q: How many grams of hydrogen are in 33.9 g of CH4O?

A: Given  Mass of CH4O = 33.9 gram Mass of Hydrogen = ?

Q: What mass of ZnCO3 contains 3.11x1022 O atoms?

A:

Q: What is the mass in grams of 8.51 moles of Al2O3?

A: According to the mole concept, one mole of any substance related as - (1) 1 mole of the Substance =…

Q: The atomic mass of Cl is 35.45 amu, and the atomic mass of Al is 26.98 amu. What are the masses in…

A:

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.