Which weighs less, 0.25 mole of xenon atoms or 2.0 moles of carbon atoms?

Q: An unknown compound is processed using elemental analysis and found to contain 117.4 g of platinum,…

A: We know that,  Number of mole = given mass/molar mass Atomic mass of platinum =195.084 g

Q: A block of pure magnesium metal weighs 76.9 grams. How many moles of magnesium are present in the…

A: Mole= mass of Mg / molar mass of Mg Given - 1) mass of Mg =76.9              2) Molar mass of Mg=…

Q: A given sample of a xenon fluoride compound contains molecules of a single type XeFn , where n is…

A: Given that 8 x 1020 molecules of XeFn weigh 0.225 g 6.022 x 1023  molecules of XeFn will weigh=6.022…

Q: What is the mass of 9.19x10^24 molecules of nitrogen dioxide?

A: Given Molecules of nitrogen dioxide (NO2) = 9.19 × 1024 molecules

Q: If 3.5 g of element X reacts with 10.5 g of element Y to form the compound XY, what is the percent…

A: A chemical compound is a chemical entity made up of several similar molecules (or molecular…

Q: 22. The molar mass of Ba (NO3) 2 is?

A: In this question we need to calculate the molar mass of Ba(NO3)2 we know the molar mass of…

Q: (a) Determine the mass of sodium metal that contains the same number of moles as 87.2 g of copper…

A: (a) Determine the mass of sodium metal that contains the same number of moles as 87.2 g of copper…

Q: Zinc Oxide decomposes into zinc and oxygen. If 52.1 g of zinc oxide decomposes to form 41.8 g of…

A: Given,52.1 g of zinc oxide, 41.8 g of zinc.The balanced chemical reaction of decomposition of zinc…

Q: A metal has the mass  of 12.00 g and 5.850 x 1022 atoms.  Calculate molar mass of the metal.

A: Formula use is, no of moles = weight/ molar mass

Q: Is the subscript of an element the same as its number of moles? Does the subscript mean how much…

A:

Q: Which of the following is equal to exactly 1 mole of atoms?     6.00 grams of carbon     31.93…

A: According to the mole concept , a mole is a measurement unit of any Substance in which particular…

Q: The snicker bar you just bought has 1.40 x 1029 molecules. How many moles is that?

A: Given data: The number of molecules in the snicker bar = 1.40 x 1029 molecules. To calculate: The…

Q: An element consists of 4.35% of an isotope with mass 49.946 u, 83.79% of an isotope with mass…

A: Average atomic mass: The average atomic mass of an element is the sum of the masses of its isotopes,…

Q: What is the mass in grams of 2.13 x 1018 moles of Lithium?

A: Since, Moles is the ratio of mass to the molar mass of that atom or molecules. Thus,

Q: Convert 1.89 × 1024  atoms of carbon to moles of carbon

A: Number of moles = Number of atoms/6.0224 x1023

Q: There are 1.18x10^24 carbon atoms in how. Many grams of glucose?

A: 1 mole = 6.0224 x 1023Mass = Number of mole x Molar massMolecular Formula of glucose = C6H12O6

Q: Number of atoms of Carbon in 15 moles of C4H10 are: 90.33x10^23 361.32x10^23 O 6.23x10^23

A:

Q: 5.00 g of a nitrogen oxide contains 1.84 g of nitrogen. What is the empirical formula of the oxide…

A: Given: Mass of nitrogen oxide = 5.00 g. And the mass of nitrogen in the compound = 1.84 g.

Q: A given sample of Xenon flouride compound contains molecules of the same type XeFn where n is some…

A: Chemical formula which shows number of chemical elements and total element’s number available in…

Q: A cylinder of nitrogen gas (N2) weighs 550 grams. How many moles of nitrogen are present in the…

A: Molar mass of N2 = 28.0 g/ mol

Q: What is the mass grams that are in 6.30 × 1025 molecules of 1,?

A: Given is,  Molecules of I2= 6.30×10^25  And we know, Avogadro's number 6.022×10^23 Molar mass of I2=…

Q: 8) How many moles of NO will contain 7.89 × 1020 m

A: One mole of any compound contain Avagadro number of molecules. Avagadro No. (Na) = 6.022 × 1023

Q: 5. Lead metal can be extracted from a mineral called galena, which contains 83.2% lead by mass. A…

A: Given,mass of ore = 6.75 kgmass percent of lead in the galena = 83.2 %mass percent of galena in the…

Q: How many moles of silicon, Si,Si, are in 1.55×1024 Si1.55×1024 Si atoms?

A: Given,Number of Si atoms = 1.55 × 1024Required,                Moles of silicon, Si present in…

Q: What is the mass of 2.49 x 1022 of CH4 molecules?  ( 1 mole = 6.02 x 1023)

A: Calculate the number of moles of methane.

Q: The mass of C3H8O3 that can be made from 2.4 × 1023 H atoms is

A:

Q: Number of atoms of C in 10 moles of C4H10 are:     240.88x10^23 24.09x10^23 4.15x10^23…

A:

Q: Determine the mass in grams of 5.15 × 10²¹ atoms of chromium. (The mass of one mole of chromium is…

A: Molar mass of any substance is the mass of one mole of substance and one mole of substance contains…

Q: The elements X and Y form a compound that is 40% X and 60% Y by mass. The atomic mass of X is twice…

A:

Q: What is the mass of 0.015 moles of FeO?

A:

Q: The human body contains 63% H, 25.5% O, 9.45% C, 1.35% N, 0.31% Ca and 0.22% P, plus trace elements…

A: The percentages given are mass percentages, not mole percentages. This is because the percentages…

Q: The molar mass is the mass of 6.022 x 1023 particles of matter. O True OFalse

A: We know that, Avogadro number =6.022 × 1023 partical/mol so,

Q: 2.845 x 10E12 potassium ions equals how many moles of potassium ions?

A:

Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.