How many atoms of O are found in 1.00 x 10 2 g of K 2Cr 2O 7 ?

Q: How many moles of Ca(OH)2 are present in 370.47 grams of Ca(OH)2?  2  3  5  6

A:

Q: How many grams of tungsten(VI) oxide, and how many grams of hydrogen must you start with to prepare…

A:

Q: Determine the mass percentage of hydrogen in CH4  and ‍C2H6.

A:

Q: How many moles are there in 2.75 x 10^24 atoms of copper?

A: we know that one mole of copper contain Avogadro's number of atoms Avogadro's number= 6.023 × 1023

Q: Which of the following is the molecular weight of a binary compound made from the element calcium…

A: A compound which is formed exactly of only two atoms that are different from each other, and cannot…

Q: How many atoms of Cu are existing in 2.36 g of copper wire?

A: Since molar mass of Cu = 63.546 g/mol Mass of Cu = 2.36 g (given)

Q: How much would 2.4 x 1024 molecules of N2O5 weigh?

A: Given- number of Molecules =2.4 ×10^24 molecules

Q: 2. If you have 1.00 grams of N22CO3, how many moles of Na2CO3 is that?

A: Given, mass of Na2 CO3 = 1.0 g Moles of Na2CO3  = ?  Firstly, find Molecular mass of Na2CO3

Q: Which one of the following has the smallest mass percent of F in the compound? A)SF6 B)NaF C)XeF2…

A: The details solution for this is provided below in attach image.

Q: How many grams of iron are needed to combine with 24.6 g of O to make Fe2O3?

A:

Q: Which pair of elements would you expect to exhibit the greatest similarity in their physical and…

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Q: 2. Balance the following equations (in the formation of heavier elements). a.*He +He - Be b. “He +n…

A: Given nuclear equations are :  a). 4He + 4He -----------> Be  b). 4He + n -------------> 4He…

Q: 6. Boron 7. Yttrium 8. Beryllium 9. Gallium 10. Mercury

A: Write electronic configuration of the given element---

Q: What is the mass of 4.63 x 1012 atoms of Fe? O 2.73 x 10-10 g O 4.29 x 10-10 g O 9.76x 10-10 g O…

A:

Q: The active ingredient in baking soda is NaHCO3. How many grams of NaHCO3 are needed to provide 2.15…

A: The active ingredient in baking soda is NaHCO3.  One atom of NaHCO3. contains = 3 atoms of O. or, 1…

Q: Calculate the percentage of carbon, hydrogen, and oxygen (by mass) in C12H22O11.

A: Each substance/molecule gets formed by combining some element's atom with certain proportion. The…

Q: What is the mass percentage of O in C,H,O,? 42.051 % C 8. 9. +/- x 100 3. 2. 4. 7,

A: Given: C3H8O2

Q: How do I calculate the theoretical mass percent of barium in a sample of BaCl2*2H2O?

A: Generally, the %mass is determined by dividing the species mass with total mass of sample which then…

Q: Without doing any calculations, determine which of the samples contains the greatest amount of the…

A:

Q: W

A: A mole can be defined as a unit for the amount of substance. Formula for number of moles:

Q: Determine the Average Atomic Mass of the mixtures of Hydrogen isotopes. 99% 'H, 0.8% ²H, and 0.2% 'H

A: Answer is explained below.

Q: When 0.210 g of iron (atomic weight = 55.85 g/mol) is burned, 0.341 g of iron oxide is obtained.…

A: The symbol for iron is Fe The symbol for oxygen is O The molar mass of Fe is 55.85g/mol The molar…

Q: What is the mass in grams of 9.76 × 1012 atoms of naturally occurring potassium?

A: mass = 6.32 x 10-10 g

Q: What is the mass in grams of 2.00 × 105 atoms of naturally occurring neon?

A: Given : Number of atoms of neon i.e Ne = 2.00 X 105 atoms.

Q: Calculate the number of atoms in a 2.92 x103 g sample of boron.

A: Firat calculate number of moles.

Q: iron (II) phosphate Ca3(PO)2->Fe,N +COCNJ2+FePo4 1. How many grams of calcium phosphate must be used…

A: The stepwise solution is as follows -

Q: What is the percentage of nitrogen, by mass, in calciumnitrate?(a) 8.54% (b) 17.1% (c) 13.7% (d)…

A: Calcium nitrate is a compound of formula CaNO32. One mole of calcium nitrate contains two moles of…

Q: What is the mass percent (mass %) of Cr in the same unknown salt? O 20.6 % 32.9 % O 8.78 % 13.5 % O…

A: The gram equivalents can be calculated easily if the normality and volume are given because the…

Q: What is the mass percent of oxygen in water: 33.3% 5.60% 88.8% O 11.2%

A:

Q: what is the mass percentage of water in Zn(NO3)2*6H2O?

A: Mass percentage of water = Mass of waterMass of Zn(NO3)2.6H2Ox100There are total six water molecule…

Q: How many grams of iron are needed to combine with 26.3 g of O to make Fe2O3?

A:

Q: The element X forms the compound XOCl2 containing 59.6% Cl. What is element X?

A: The empirical formula is the chemical formula of any compound that represents the proportions of…

Q: Determine the mass percentage of carbon, C, hydrogen, H, and oxygen, O, in C,H2O6. R

A: Given :-  Molecular formula of glucose = C6H12O6  To be determined :-  Mass percentage of C, H and O…

Q: What is the mass of one atom of I? O 6.641 x 10-23 g O 4.745 x 10-22 g O 2.107 x 10 22 g O 3.443 x…

A: To determine the mass of 1 atom of I, do the following : 1) Determine molar mass of the substance.…

Q: C. What is the weight of ferrous sulfate FeSOa.7H: 0 should be taken to designate iron as ferric…

A: Recall the following reaction that will occur on heat of hydrated ferrous sulphate      FeSO4.7H2O…

Q: Which element comprising Mg(OH)2 has the highest percentage by mass? RSK. Oxygen KRS. Hydrogen RKS.…

A: % w/w for an element in a compound = (mass of element/total mass of compound) × 100%

Q: 19.18. What is the empirical formula of a mineral contg. 3.37% HO; 19.10% AlO: 21.00% CaO; and…

A: Empirical formula is the simplest formula of a compound which show ratio of atoms or molecules in…

Q: Which one of the following has the smallest mass percent of F in the compound? A) SF₆ B) NaF…

A: The mass percentage of fluorine is 78.04 %.

Q: what is the atomic weight of O3?

A: Atomic weight of O3 = ?

Q: What is the percent abundance of the rarest of three iron isotopes

A: Introduction: We have to tell the rarest abundance of iron in three isotopes.

Q: What is the mass percentage of oxygen in the compound C 6H 60 8? g? O 62 % O 72% O 6.2% O 58% O 76%

A: We can solve this problem by using the following equation Mass % of the element= (mass of…

Q: how many atoms per particle in sulfur(s8)?

A: Atomic mass of sulfur = 32g Molecular mass of S8 =8×32=256g

Q: 50 4 grams of impure sodium chloride is dissolved in water and excess of silver nitrate solution is…

A: Molar mass of NaCl = 58.44g/mol Molar mass of AgCl = 143.32g/mol Molar mass of Cl = 35.45g/mol

Q: 6. How many hydrogen atoms are there in 0.75 mol of C,H10O?

A:

Q: When 0.210 g of iron (atomic weight = 55.85 g/mol) is burned, 0.341 g of iron oxide is obtained.…

A: Given  Wt. If iron = 0.210 g  Wt. Of iron oxide = 0.341 g  Atomic weight of iron = 55.85 g/mol…

Q: To what weight of AICI3 would 0.280 g of AgCl correspond? Atomic weights for Ag = 108, Cl = 35, Al =…

A: Molecular weight of AgCl = (108 + 35 ) = 143 g/mol  So, 143 g AgCl = 1 mol AgCl  1 g AgCl = 1/143 =…

Q: A 67.2 g sample of a gold and palladium alloy contains 3.07×1023 atoms . What is the mass…

A: Given : Mass of sample = 67.2 g And total number of atoms = 3.07 X 1023 atoms Assuming the moles of…

Q: Uranium (VI) fluoride (UFe) can be used for the enrichment uranium. What is the elemental…

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.