A student weighs an 18 g sample of Al and needs the same number of magnesium atoms as she has in the Al sample. The number of grams of Mg she needs is

Q: How many atoms of He can a balloon hold that has a 21 cm diameter hold? The density of Helium is…

A: Radius, r=diameter2=212=10.5 cm volume of spherical baloon…

Q: (a) What is the mass, in grams, of one mole of 12C? (b) Howmany carbon atoms are present in one mole…

A: (a) Molar mass of Carbon-12 is 12.01 g/mol. Hence, 12.01 g of pure carbon-12 is known as one mole of…

Q: How many titanium atoms are in a pure titanium bicycleframe with a mass of 1.28 kg?

A: The number of titanium atoms is in a pure titanium bicycle frame with a mass of 1.28 kg has to be…

Q: A tube of Thothpaste contains 0.76 g of sodium monofluorphosphate (Na2PO3F) in 100 mL. a)what mass…

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

Q: percent

A: CuO  + H2 ------------------ Cu  + H2o  Mm of CuO = 79g No of mole of Cu is = 4.7/79= 0.21mol From…

Q: A pure gold ring contains 0.0102 mmol (millimol) Au. Howmany gold atoms does it contain?

A: Given: Moles of Au = 0.0102 mmol= 0.0102×10-3 mol To find: The number of gold atoms

Q: What is the mass, in grams, of 1 mole of oxygen atoms?

A: Given :- number of moles of O = 1 mol  To calculate :- mass of 1 mol O atoms 1 mol contains 6.022 ×…

Q: How many grams of water (18.02 g/mol) would contain 6.54x10^24 hydrogen atoms?

A: Given :Molar mass of water = 18.02 g/molNumber of H-atoms = 6.54 x 1024We need to calculate the…

Q: How many moles of tin atoms are in a pure tin cup with mass of 38.1 g? a

A: Given data: The mass of tin atoms = 38.1 g. To find: The number of moles of tin atoms.

Q: A chromium containing compound has a formula FexCryO4 and is 28.59% oxygen by mass  Find x and y

A: Given, mass percentage of O in FexCryO4 = 28.59%Molar mass of 4 O in FexCryO4 = 4 × 16 g/mol = 64…

Q: Nith the given nutritional information, one cup of milk will provide ( ) grams of KT ions.

A: Nutritional information refers to the amounts of different nutrients present in a substance. It is…

Q: How many atoms are in 15 g LİCIO,? number of atoms: How many ions are in 15 g LiCio,? number of…

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

Q: How many atoms of vanadium are in 1.28 grams of vanadium

A: One mole of any chemical substance has Avogadro’s constant or Avogadro’s number of atoms.…

Q: How many atoms are in 1.00g of gold?

A: Number of atoms in 1.00g of gold is to be determined.

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

A:

Q: Calculate the mass % of O in calcium periodate

A: The molecular formula of calcium periodate is Ca(IO4)2.  We know the molar mass of calcium…

Q: A sensitive electronic balance candetect masses of 1 × 1 0 -8 g. How many atoms of silverwould be in…

A: In order to calculate the number of atoms of an element present in a given amount we first need to…

Q: calculate the mass of a sample that contains 23 nitrogen atoms

A: Mole is the unit for the number of atoms or molecules of a material. One mole = 6.022×1023 molecular…

Q: A 1.628-g sample of a hydrate of magnesium iodide isheated until its mass is reduced to 1.072 g and…

A: Given data mass of sample  = 1.628  g mass of sample after heating = 1.072 g…

Q: A sample of ammonia has a mass of 98.5 g. How many molecules are in this sample?

A:

Q: A 21.8 g sample of water contains how many water molecules?

A:

Q: How many oxygen atoms are contained in a 5.525 g sample of calcium phosphate?

A: First of all, we will calculate the no. of moles of calcium phosphate in 5.525 g of sample and then…

Q: e mass percent of

A:

Q: 26. Diamond is one form of elemental carbon. An engagement ring contains a diamond weighing 1.25…

A:

Q: A 25.75 g sample of nitrogen oxide was found to contain 6.68 g of nitrogen and the rest oxygen…

A: Compound is made of N and O only. So Nitrogen oxide mass is given and nitrogen mass is given then…

Q: Calculate the mass of 500. atoms of iron (Fe).

A:

Q: Consider a sample of aluminum nitrate that contains 1.72 × 10²⁴ atoms of nitrogen. What is the mass…

A:

Q: determine the number of atoms of 47.56g of Pa

A:

Q: An 85.00 g sample of an unknown compound contains 24.26 g molybdenum, 24.33 g sulfur, and the rest…

A: Given,  Mass of the compound = 85.00 g  Mass of molybdenum = 24.26 g  Mass of sulfur = 24.33 g  Mass…

Q: 9. Using the following reaction 2NaBr +CaF, →2NAF+ CaBr2 If 6 moles of CaF2 were added, what mass of…

A: Given  moles of CaF2 = 6 moles Molar mass of  CaBr2 = 199.9 gm/mole Mass of CaBr2= ?

Q: How many grams of C are present in 4.84 grams of carbon dioxide ?

A: We have to find grams of C are present in 4.84 grams of carbon dioxide

Q: How many atoms are present in a Mg sample with a mass of 14.6 grams?

A:

Q: Calculate the mass in grams of 14 atoms of Ca.

A:

Q: What is the mass of 500 gold atoms in grams?

A:

Q: A is asking If the carbon in the pencil weighs 1.50 grams, how many carbon atoms does the pencil…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

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: Which sample contains the greatest number of atoms. A sample of Li that contains 3.12×1024 atoms or…

A: Avogadro's  number is a proportionality factor and gives the number of atoms, molecules or ions in…

Q: • Part A How many titanium atoms are in a pure titanium bicycle frame with a mass of 1.12 kg ? ? Ti…

A: 1mole=6.023×1023molecules/atoms/ions.1mole = molar mas of any substance.atomic masy of Titanium…

Q: Mass of crucible, lid, and magnesium oxide                                             ____19.41…

A: Given: Mass of the crucible, lid, and magnesium oxide = 19.41 g And Mass of empty crucible and lid…

Q: How many titanium atoms are in a pure titanium bicycle frame with a mass of 1.34 kg ?

A: Given that mass of titanium bicycle frame = 1.34 kg = 1340 g Molar mass of titanium (Ti) = 47.867…

Q: How many grams of F are in 325 g CaF, ? mass: g

A: Calculate number of gram of F in CaF2 ?

Q: Calculate the mass of 14.4 moles HgO. (In Kilograms)

A:

Q: A metal alloy containing 67% (by mass) lead and having a density of 9.4 g/cm3 . If the second metal…

A: Given Information -  mass % of lead,Pb= 67%  mass % of tin = 100% - 67% = 33%  mass of lead = 67 g…

Q: Calculate the mass of 500 atoms of iron (Fe).

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: Calculate the mass of 400. atoms of sulfur (S)

A: Given: Number of atoms of S = 400 atoms.

Q: e the % by mass of Fe to T

A:

Q: Suppose you have a sample of sodium weighing 14.10g. How many atoms of sodium are present in this…

A: approach to solve this type of question is - first convert the given amount into the mole. we know…

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

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.