If a student weighs 11 g of aluminum and needs twice as many atoms of magnesium as she has of aluminum, how many grams of Mg does she need? g Mg

Q: How many grams of tin are present if there are 6.022 x 10^23 atoms present in a sample

A: Applying mole concept. Mole= w/M

Q: A sample of Ca3(PO4)2 contains 3.51 moles of calcium ions. How many moles of Ca3(PO4)2 are in that…

A: • Given,     Molecule = Ca3PO42 .    Number of moles of Ca+2 = 3.51 mole.    We know,    Ca3 PO42 →…

Q: A Sample of pure Calcium fiuoride With a mass of 15.0g Contains 1.709 of calcium. How much calcium…

A: This question can be solved using proportion method as:

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: A prospector panning for gold in a river collects 15.00 g of pure gold. How many Au atoms are in…

A: Given information,          Mass of gold is 15.00 g

Q: atoms

A:

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 moles of gold are present in a sample containing 7.50 x 1024 atoms of gold?

A: Given- Number of atoms of gold = 7.50 ×1024 atom

Q: Which of the following has more atoms: 3.55 g ef lithium atoms or 19.1 g of nickel atoms?

A: Mass of lithium = 3.58 g Mass of nickel = 19.1 g

Q: Identify the number of atoms of silver that are in 0.2124 moles of silver

A: Given - - > Number of mol of silver = 0.2124 mol   We known that, 1 mol of atoms = 6.022 x 1023…

Q: How many moles of Ba are there in a sample of Ba that contains 2.20×1024 atoms? moles

A: Answer:- this question is answered by using the simple concept of calculation of number of moles…

Q: If a student weighs 23 g of aluminum and needs twice as many atoms of magnesium as she has of…

A: Mole is the amount of the substance that contains the same number of particles or atoms or…

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: Gold, known as the king of metals is used in production of coins and jewelries. How many atoms of…

A:

Q: How many atoms are present in (6.78x10^1) g of an element with the following molar mass.…

A:

Q: How many moles of barium are contained in 112.6 g of barium?

A:

Q: How many moles of Sn are there in a sample of Sn that contains 2.38x10^24 atoms

A: Number of moles = Given no. of atoms/NA NA = Avogadro's number = 6.022 x 1023 Number of Sn atoms  =…

Q: 1. How many grams of Ca are in 0.25 mol of Ca?

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

Q: O3

A:

Q: If 2.06 mL of seawater contains about 6.91×10-14 moles of gold, how many atoms of gold are in that…

A:

Q: how many atoms of F in 2.62 mol of F2

A: Given :- no.of moles of F2 = 2.62 mol  To be calculated :- number of F atoms

Q: 1. How many moles of Sc are there in a sample that contains 14.6 grams of scandium? moles 2. How…

A: The moles and mass of the element are related to each other by the formula given below as;…

Q: What is the mass of aluminum if the same amount of electricity used to generate 500 g copper metal…

A: All the necessary calculations have been done in the following step.

Q: How many grams of sulfur tetrafluoride contain 2.82 grams of F ?

A: The mass of one mole of molecules of a substance is known as its molar mass The number of moles of a…

Q: EF and MF

A:

Q: Suppose you have a sample of sodium weighing 11.74 g. How many atoms of sodium are present in the…

A: The number of moles (n) of sodium present in the given sample is calculated from the expression (1).…

Q: 20)A 10 g sample of which substance contains the greatest number of hydrogen Atoms? 

A: [A.] 10 g of PH3  Molar mass of PH3 = 33.997 g/mol  Number of moles of PH3 = 10 g / 33.997 g/mol  =…

Q: How many grams are in 2.00 moles of Be? Atomic weight of Be=9.01

A:

Q: How many atoms are in 20.5 g of carbon-12?

A: We know that, 1 Mole = 6.023 X 10^23 Atoms / Molecules /Ions Number of moles = Given mass / Molar…

Q: How many moles of Cs are contained in 595 kg of Cs?

A: Here we have to calculate how many moles of Cs are contained in 595 kg of Cs

Q: How many moles of magnesium are present in 3.01 grams of magnesium?

A: Magnesium is an which is having atomic No. 12. It is an important mineral. It has role in enzyme…

Q: You have a 20.0 g sample of silver metal. You are given 10.0 g of another metal and told that this…

A: The situation is possible or not has to be determined.

Q: How many atoms of Pt are present in 2.53 moles of Pt?

A:

Q: How many grams of P are present in 2.92 grams of phosphorus triiodide ?

A: Molar mass of phosphorus triiodide (PI3) = 411.6872 g/mole Number of moles of phosphorus triiodide…

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: d. 5.90 mol of Ca to atoms of Ca

A: From mole number or avagadro number we can calculate number of atoms of "Ca".

Q: The mass in grams of iodine in a sample of BaI 2 that contains 15.7 grams of barium is

A: The moles of Barium ion is calculated as follows,

Q: Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48…

A:

Q: Consider a 3.55 g sample of C4H10. How many atoms of C would be in this sample?

A: Molar mass of C4H10  = 58 g/ mol Fraction of  C = 48/58 = 0.8276

Q: How many ATOMS of phosphorus are present in 8.70 grams of phosphorus triiodide ?  atoms of…

A: Data given: Mass of phosphorus triiodide = 8.70 g Number of molecules of phosphorus triiodide =…

Q: Identify the substance based on the mass. Gold (0.241 g). Calculate how many atoms the substance…

A:

Q: How many calcium atoms are in 62.8 gg of calcium?

A: Given mass of Calcium =62.8 gram  Number of calcium atom =?

Q: Which contains more atoms? 10g of He 10g of H2O 10g of Ca

A: Given, 10g of He 10g of H2O 10g of Ca

Q: How many grams of lithium will combine with 21.3 g of sulfur to form the compound Li2S?

A: Given, mass of S = 21.3 g  Mass of Li2S = ?

Q: What is the mass of 1.000 × 1024 Aluminum atoms in grams

A: Molar mass of Al( Aluminum)  = 27 g/mol also 27 g = 1 mol = 6.023 × 1023 atoms  Mass of Al in 1.000…

Q: how many flouine atoms are in1.000 mol of SF4 (molar mass=108.06 g/mol)?

A: The number of atoms in one mol substance is known as Avogadro's number and that is equal to 6.02 ×…

Q: A 20.0 g sample of Ca contains how many calcium atoms?

A: