A sample of CH2F2 with a mass of 19 contains atoms of F. O 2.2 x 1023 O 9.5 9 3.3 x 1024 4.4 x 1023 O 38

Q: Tin, element 50 on the periodic table, has 10 stable isotopes. 117^Sn makes up 7.687% of naturally…

A: Using the formula moles of Sn117 is calculated as,

Q: Counting Atoms Fill in the table Pb C CI Mass (g) 0.543 1.834 Molar Mass g/mol) 0.685 Moles Total…

A: We can solve these questions by knowing some of the basic mole concepts, like conversion of number…

Q: Naturally occurring chlorine is 75.78% 35Cl (atomic mass 34.969 u) and 24.22% 37Cl (atomic mass…

A: Given :  Atomic mass of lighter isotope i.e 35Cl (A1) = 34.969 u  Percentage abundance of lighter…

Q: On earth, tin has 10 different stable isotopes. The heaviest, 124Sn makes up 5.80% of naturally…

A: Grams of 124Sn present in 38.3 g sample     = 38.3*(5.80/100)= 2.22 g

Q: A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

A: Note : As per our guidelines we are supposed to answer one question .please resubmit the other…

Q: What is the mass of 2 moles of NH3? (Hint: 1 molecule of NH3 has a mass of 17 amu) * O 17 amu O 17 g…

A:

Q: ?How many atoms of hydrogen are present in 2.62 g of water 1023 7.83 .A 1022 8.76.B 1023 · 1.75.C O…

A: Number of hydrogen atom can be calculated by the help of number of moles. Mole is a counting unit…

Q: How many grams of carbon are present in 67.9g of C3H3? Atomic weights: C = 12 H= 1 55.6g 25.5g 22.6g…

A:

Q: (2.112 Each circle contains a representation of Determine its name, formula, and molecular (formula)…

A: To predict the molecular mass and name, at first one has to determine the chemical formula of the…

Q: 3)A pure copper sphere has a radius of 0.935 in. How many copper atoms does the sphere contain? The…

A:

Q: Reference section 3.2 to find the atomic masses of 12C and 13C, the relative abundance of 12C and…

A:

Q: A sample of CH 2F 2 with a mass of 19 g contains atoms of F. 38 в) 3.3х 1024 c) 2.2 x 1023 D) 9.5 E…

A:

Q: A compound is made up of 81.71% carbon and 18.28% hydrogen. Determine the empirical formula. O CH O…

A: This question belong to some basic concept of chemistry that is mole concept. We have solved this…

Q: Two thirds of the atom in a molecule of water is hydrogen. What percentage weight of a water…

A: Given: Hydrogen atoms in a water molecule = 2/3 Atomic weight of hydrogen = 1.008 g/mol Atomic…

Q: 9. There are 1.5 x 1023 atoms in 2.5 moles of zinc. TRUE FALSE Chock it skip

A: Number of atoms in 1 mole = 6.02 x 1023

Q: One mole of copper has a mass of 63.5 grams. Approximately how many atoms of copper are present in…

A: Given  Number of mole = 1 mole  Number of atoms of copper = ?

Q: A pure silver sphere has a radius of 0.886 cm. How many silver atoms does it contain? (volume of a…

A: Calculate the volume of the silver sphere,      Volume of silver sphere = 43 π r3= 43 × 227 × (0.886…

Q: (Uf a gas) Explain the difference between the atomic mass of chlorine and the formula mass of…

A: An atomic mass is defined as the average atomic mass of atoms present in an element.

Q: A sample of Ca3(PO4)2 contains 2.1 x 1024 phosphorous atoms. How many oxygen atoms are in the…

A: There are 8 moles of oxygen atoms per 2 moles of Phosphorous atoms in 1 mole of Ca3(PO4)2 which…

Q: What mass of Al contains the same mumber of atoms as 3,.0g Pb a 23 g 6.0.014 g c 3.0 g d.0.39 g e…

A: Given : Mass of Pb = 3.0 g Since number of atoms of any element is given by, => Number of atoms =…

Q: How many oxygen atoms are there in a formula unit of UO 2(C 2H 3O 2) 2 • NH 4C 2H 3O 2 • 5H 2O?   a.…

A: one molecule of O2 contains 2 atoms of oxygen

Q: Determine the number of moles of hydrogen atoms in each sample. a. 0.0885 mol C,H10 c. 2.4 mol C,H12…

A: a. 0.0885 mol C4H10 1 mol of C4H10 contains 10 mol of H. Thus, 0.0885 mol C4H10 will contain 10 x…

Q: Determine the number of atoms of O in 7.23 moles of Ca(NO3)2. atoms 3 4 6. 7 9. +/- х 100 2.

A: Given: Moles of Ca(NO3)2 = 7.23 mol

Q: How many grams of platinum (Pt) contain the same number of atoms as 5.0 g of lithium (Li)? О а. 0.18…

A: Given, Mass of lithium (Li) = 5.0 g Mass (in grams) of platinum (Pt) contain the same number of…

Q: How many moles of atoms are in each elemental sample? 1.10 g Zn 25.4 g Ar

A: Given :-  mass of Zn = 1.10 g  mass of Ar = 25.4 g  To be calculated :-  number of moles of Zn and…

Q: What is the empirical formula of an unknown compound that contains 48.02% Carbon, 18.74% hydrogen,…

A: The simple number of atoms present in the molecule is shown below.

Q: Naturally occurring iron contains 5.82% 54Fe, 91.66 % 56Fe, 2.19% 57Fe, and 0.33% 58Fe.  The…

A: Answer:- This question is answered by using the simple concept of calculation of average atomic mass…

Q: Suppose you have 2.50×1018 reamsreams of lead (PbPb). How many lead atoms do you have

A: The number of Lead atoms can be calculated as, 1 ream= 500

Q: James has a balloon that contains 1.54 grams of helium. How many atoms of helium are inside the…

A: To find out the number of atoms in sample, first we have to find the number of moles. Moles = Given…

Q: You have 53 carbon atoms. What is the mass? Which units should you use g/mol or amu? a. 686.58 amu…

A: Answer: No option is correct. The correct answer is 636.53 amu We should use amu unit instead of…

Q: The mass of 0.22 mol of a molecule is 35.16 g. Identify the molecule. O Br2 O 02 12 O F2 O Cl2

A: Given: The number of moles of a molecule is 0.22 mol. The mass is 35.16 g.

Q: Which of the following contains the most atoms? 24.305g Mg 39.098g K 9.0122g Be 21.62g B

A: One mole of a substance contains 6.022×1023 atoms and the number of moles of a substance can be…

Q: By using the atomic mass unit u= 1.6 x1024 gram, Avogadro's number will be equal to a) 6.02 x1022 b)…

A: The atomic mass unit is the unit of mass usually denoted by (amu). It is the parameter to express…

Q: Determine the number of atoms in a sample of 2.26 g Hg. O 6.78 x 10 21 atoms O7.53 x 10 22 atoms O…

A: Number of moles of a chemical element or a compound is used to measure the amount of element or…

Q: what mass iron contains 6.12 x 10^22 atoms of fe

A: Given,              Number of atoms of Fe=6.21×1022 atomswe need to determine the mass of Iron.

Q: Calculate the number of molecules present in 27.2 g of Al(NO3)3. Use the following as average atomic…

A: We have to calculate the number of molecules present.

Q: Calculate the empirical formula for each natural flavor based on its elemental mass percent…

A: A chemical compound is formed when two or more elements are combined together and the mass of the…

Q: 15. A sample of 1 mole of which of the following contains the greatest number of oxygen atoms? e.…

A: Oxygen atoms:

Q: What is the mass of 1.48 Mol of potassium sulfide (K2S)? A. 12.0g B. 0.0134g C. 195g D. 74.5g…

A: Solution The mole conception could be a convenient methodology of expressing the quantity of a…

Q: 103: A pure copper cube has an edge length of 1.42 cm. How many copper atoms does it contain?…

A: 103) Volume of cube = (Edge length)3                          = (1.42 cm)3 = 2.863 cm3 Density of…

Q: Fe2O3(s)+3H2(g)→2Fe(s)+3H2O(l)   Calculate the mass of H2O

A: According to the given equation, number of moles of water formed = 3 mole

Q: How many carbon atoms are in a pure diamond (all carbon) with a mass of 52.00 mg? O A. 4.330 x 100 O…

A: Diamond is made up of pure carbon given , mass of diamond =52 mg STEP 1 conversion mg unit to gram…

Q: Two moles of (NH4)2Fe(SO4)2-6H20 contains O a. 8 O b.4 moles of sulfur atoms. O d. 6 O e. 2

A:

Q: H. Ex: Isotopes of Boron: Boron contains 10B (10.0129g/mol) and 11B. 1°B is 19.91% abundant. Based…

A: given, molar mass of 10B = 10.0129 g/mol let the molar mass of 11B = x g/mol abundance of 10B =…

Q: What is the mass of 3.75 moles of Silver? O a. 327.5 g O b. 168.64g O c. 405 g O d. 520.9 g

A: given  number of moles =3.75

Q: A sample of C3H8 has 2.40×1024 H atoms. How many carbon atoms does the sample contain

A: Given :- number of H atoms in a sample of C3H8 = 2.40 × 1024 atoms  To calculate :- number of C…

Q: A compound contains carbon, oxygen, and hydrogen. Analysis of a sample showed that it contained by…

A: 27) Given: Percent by mass of C = 68.9 % Percent by mass of H = 4.92 %

Q: Determine the number of atoms of O in 76.2 moles of Na₂Cr₂O₇.

A:

Q: An experiment requires that enough SiCI2 I2 be used to yield 18.1 g of iodine. How much SiCI2 I2…

A: Mass of iodine produced = 18.1 g   From the reaction we get that , 1 mol SiCl2 produce = 1 mol I2…

Q: Determine the number of atoms of O in 85.0 moles of Cra(PO.) 4.09 x 10 26 atoms 3 4. 6. 8. 9. +/- x…

A: Given: 85.0 moles of Cr3(PO4)2

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.