the atomic weight of magnesium is 24.3 g/mol, calculate how many magnesium atoms does 5g represent?

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: moles of atoms are in each elemental sample?

A: 1) Using the molar equation- n: number of moles of the elemental sample. m: given mass of the…

Q: Using the periodic table for this course (Chem 100 Periodic Table.pdf ), which substance contains…

A:

Q: Complete the table. Element Mass Moles Number of Atoms Na 38.5 mg C 1.12 V 214 Hg 1.44 kg

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: How many grams of silicon are present in 2.78 moles of silicon dioxide?

A: Recall the data, moles of SiO2=2.78 moles mass of Si=?

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…

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Q: S Ina 3.7-gram sample, there are (A) 1.1 x 10 atoms of gold (B) 3.2 x 1025 atoms of gold (C) 4.4 x…

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Q: How many moles are in 38.9 of Al? Atomic Weight of Al= 26.98

A:

Q: The cullinan diamond was the largest natural diamond ever found (january 25 , 1905 25, 1905). It…

A: Use formulas Mole=mass÷molar mass Total atoms=mole×6×1023 MOLAR mass of diamond= 12g/mol

Q: 5. In a 3.7-gram sample, there are (A) 1.1 x 1022 atoms of gold (B) 3.2 x 1025 atoms of gold (C) 4.4…

A: Number of Mole-Ratio of given mass of substance to the molar mass of substance is called number of…

Q: How many silver atoms are contained in 1.75 moles of silver?

A: 1 mole of a substance is equal to the Avogadro number of atoms.  1 mole =6.022 x 1023 atoms.

Q: An unknown element is a mixture of 129X and 132X. the average mass of X is 130.79 amu. What is the…

A: Let x be the percentage abundance of 129X and (1-x)  be for 132X Average mass = 130.79 amu  Atomic…

Q: Question attached

A: Avogadro number It is a unit of 1 mole of a substance. 1 mole of any substance contains 6.02×1023 of…

Q: A student has a sample of zinc that weighs 22.19 g How many zinc atoms are in this

A: Given :- mass of Zn = 22.19 g  To be calculated :- number of Zn  atoms  molar mass of Zn = 65.38…

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: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: 1- First calculate the moles of compound XBr3  moles of XBr3 = ( moles of Br ) / 3  moles of XBr3 =…

Q: Calculate the mass of each element.a. 5.22 mol of He              c. 2.22 mol of Tib. 0.0455 mol of…

A: The number of moles can be calculated using the mass of a substance as its mass divided by the molar…

Q: Write a balanced chemical equation for the formation of magnesium oxide form magnesium metal  and…

A: When magnesium is burnt in the air, it results in the formation of magnesium oxide.

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: A sample of trifluoroacetic acid, C2HF3O2, contains 32.1 g of oxygen. Calculate the mass of the…

A: Given,  Mass of O in a sample of C2HF3O2 = 32.1 g Calculate the mass of C2HF3O2 sample = ?

Q: The total number of atoms in NaCI

A: The number of atom of an element in its molecules is known as atomicity. SodiumChloride or NaCl is…

Q: Which sample contains the greatest number of atoms? (a) 15 g Ne (b) 15 g Ar (c) 15 g Kr (d) None of…

A: The mole concept is used to solve such problems. The mole concept was introduced by Avogadro to…

Q: Enter your answer in the provided box. Assume the atomic mass of element X is 22.99 amu. A 13.75-g…

A:

Q: If a student weighs 11 g of aluminum and needs twice as many atoms of magnesium as she has of…

A: 1 mole = 6.022×1023 [Avogadro's number ]  The mass of one mole of atoms of an element is known as…

Q: What

A: The atomic mass of Al is 26.98, so 1 mol of Al atoms has a mass of 26.98 g.

Q: For 2.526 g of a compound containing only copper and oxygen, CuxOy, a student found that it…

A: From the mass of compound and mass of Cu ,we can determine the mass of oxygen. Then using molar mass…

Q: Calculate the mass of CBr4 a) 320 g b) 332 g c) 92 g d) none of these

A: Mass of C = 12g/mol  Mass of Br = 80g/mol

Q: Signature of a person increased the mass of paper by 1.2 grams with lead pencil. How many atoms of…

A: Given that Mass of C=1.2gram Molar mass of C=12g/mol No. of atoms of C=?

Q: How many carbon atoms are there in 10 Ibs of sugar, CH,,0̟,? 22 11 Select one: a. 159 atoms O b. 8.0…

A: Mass of C12H22O11=10lbs Formula used- 1 lbs=4.54kg 1kg=1000g Mole=mass/molar mass No of carbon…

Q: Consider Cl2+F2=CLF3 (ΔH°f = -164.65 kJ/mol) . 1. If 42 g of F2 is combined with 142 g of Cl2, how…

A: Balanced chemical equation: Cl2  +   3F2  ------>   2ClF3 Number of moles = Mass/molar mass

Q: how many atoms of scandium are in 7.54 moles of scandium

A: According to  Avogadro,  1 mol of scandium has 6.023 x 1023 number of atoms  Then 7.54 mols of…

Q: How many atoms are in 48.4 grams of Pb? Atomic weight of Pb=207.20

A: Given data is as follows: The mass of Pb = 48.4 g The atomic mass Pb = 207.20 g/mol

Q: Determine the number of atoms of Cin 26.9 grams of C12H22O11.

A: Sucrose is a disaccharide sugar and has a molecular formula C12H22O11. The molecular mass (M) of…

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: How many grams are in 5.4 moles of F? Atomic Weight Of F=19.00

A:

Q: Magnesium oxide contains 60.3 % magnesium by mass. Calculate the mass of magnesium oxide sample if…

A: Given,Mass percent of magnesium in magnesium oxide = 60.3%.Mass of magnesium in sample = 20.5g.

Q: Determine the mass, in grams, of 0.580 moles of Pb (1 mol of Pb has a mass of 207.2 g).

A:

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: How many grams of S are present in 4.22 grams of sulfur hexafluroride?  how many grams of sulfur…

A: Given,  Mass of SF6 : 4.22 g Molar mass of SF6 = 142 g/mol

Q: atoms

A: it is made of 3 tiny partical  known as electron ,proton and neutron  Neutron  and proton make…

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: atoms of gold (Au) In a 3.7-gram sample, there are (A) 1.1 x 1022 atoms of gold (B) 3.2 x 1025 atoms…

A: Given, mass of Au = 3.7 g Molar mass of Au = 196.97 g/mol

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: number of atoms in 5.12 g P

A: number of atoms in 5.12 g for  Phosphorus

Q: Determine the mass, in grams, of 0.750 moles of S (1 mol of S has a mass of 32.07 g).

A:

Q: 13) A 44.8 g rhodium sample contains how many rhodium atoms? B) 2.74 x 105 atoms A) 2.62 x 1023…

A:

Q: molybdenum Atomic Number 42 Molybdenum has seven isotopes, each with natural abundances between 9 -…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: Calculate the mass of AIPO3 a) 58 g b) 74 g c) 79 g d) 106 g

A: We know that, In 1 mol, Mass of Al= 27g Mass of P=31 g Mass of Oxygen=16

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: For the given compound, XBr3 Mass of sample = 4.712 g Suppose the mass of 1 mole of X be 'm' grams…