The number of Cr atoms in a 26.0 g sample of chronium is x. How many atoms, expressed in terms of x, would be contained in 26.98 g of aluminum

Q: ) A 15.5g sample of Aluminum would be equal to how many moles? ) How many atoms are in 3.5 moles of…

A: Since you posted multiple parts so I have tried to solve maximum.

Q: 13. How many oxygen atoms are in 225 g of O2? a. 4.23 x 1024 b. 6.84 x 1024 c. 8.47 x 1024 d. 1.69 x…

A: Number of Atoms of Oxygen can be calculated as -

Q: Determine the number of atoms in 55.0 grams of sodium, Na. (The mass of one mole of sodium is 22.99…

A: Here given, the mass of one mole of sodium is 22.99 g. So, in 55 grams of sodium, there are…

Q: How many carbon atoms are in 8.94 mL of C3H6O? 1 mole 6.02 x 1023 atoms 1 mL = %3D 0.883 g atoms of…

A: Calculation of mass in 8.94 mL: 1 mL=0.883 g8.94 mL=0.883 g1 mL×8.94 mL=7.894 g

Q: A brass alloy contains 78.9% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

A: We have to predict the moles of Zn and atoms of Zn.

Q: OC) 5.06 x 1024 How many atoms of carbon are in 23.1 g of caffeine (C8H10N4O2)? A) 8.00 B) 7.16 x…

A: Formula of caffeine = C8H10N4O2  Mass of caffeine = 23.1 g  Molar mass of caffeine = 8(molar mass of…

Q: Iron is found in Earth’s crust as several different iron com-pounds. Calculate the mass (in kg) of…

A: 1.0  103 kg of iron. Fe2O3 (hematite) Fe3O4 (magnetite) FeCO3 (siderite)

Q: A 3.000 g sample of a gaseous compound was found to contain 2.560 g of carbon and  0.440 g of…

A: To answer this first of all we have to convert grams into moles and we have to determine the simple…

Q: What is the mass of 3.119 moles of Ca(OH)2? a.  231.1 g b. 462.1 g d. 74.10 g c. 4.209 x 10^-2 g

A: Given, moles of Ca(OH)2 = 3.119 moles. We have to calculate how many grams of Ca(OH)2 are present…

Q: What is the empirical formula of a molecule containing four sulfur atoms and four fluorine atoms? A)…

A: Ans is B

Q: Calculate the number of atoms in each of the following masses: a. 54.0 g of aluminum ans: 1.21 1024…

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Q: Calculate the number of atoms in each element. a. 25.8 g of Hg b. 0.0340 g of Zn c. 150 g of Ar d.…

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Q: Potassium dichromate, K2Cr2O7, is used in tanning leather, decorating porcelain, and waterproofing…

A: Given: Mass of K2Cr2O7 = 43.06 g.

Q: How many atoms are in a 1.8 mol sample of Magnesium (Mg)?      1.5 x10241.5 x1024 atoms Mg   2.99 x…

A: Given : Moles of Mg = 1.8 mol.

Q: Arsenic is a natural semi-metallic chemical that is found all over the world in groundwater.…

A: A question based on mole concept that is to be accomplished.

Q: What is the mass of one atom of I? O 4.745 x 10-22 g O 3.443 x 10-22 g O 6.641x 10-23 g O 2.107 x…

A:

Q: A 2.37 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 3.24 x 1044…

A: Given data,  Mass of nitrous oxide = 2.37 g  Contains 3.24 × 1022 N2O molecules

Q: Calculate the percent mass of each element of a compound NaHSO3 = 23.0 g/mol; H = 1.008 g/mol; S =…

A: Mass percent of each element is defined as the percentage of mass each element is having compared to…

Q: A 3.17 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 4.34 x 1022…

A:

Q: 42. Ethanol (C2H50H), a domestically produced fuel source, is often blended with gasoline. A sample…

A: Given mass of Ethanol (C2H5OH) = 45.6g To determine the number of carbon,hydrogen and oxygen atoms…

Q: Mass of Aluminum 3.08 g Density of Aluminum 2.70 g/cm3 Volume of Aluminum Foil 1.14 cm3 Thickness of…

A: Mass of Al=3.08 gDensity of Al=2.70 gcm-3Volume of Al foil=1.14 cm3Thickness of Al…

Q: Two compounds have the same composition: 85.62% C and 14.38% H. a. Obtain the empirical formula…

A: Given:  Composition of C = 85.62% Composition of H = 14.38%

Q: 28) Determine the mass of the following compound: 0.0146 mol KOH A) 56.11 g B) 0.819 g C) 8.19 g 29)…

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Q: A brass alloy contains 78.6% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

A:

Q: A 2.62 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 3.59 x 1022…

A: Given  (a)   Mass = 2.62 gram       Number of molecule of N2O  =  3.59 × 1022 molecule       Number…

Q: Iron is found in Earth's crust as seve pounds. Calculate the mass (in kg) c contains 1.0 X 10° kg of…

A: Molecular-Mass: Molecular mass is the sum of atomic masses of the elements present in a molecule. It…

Q: Calculate the mass (in mg) of 9.85 x 1019 CCl2F2 molecules.

A: The relation between mass and number of moles of a substance is as follows,…

Q: 1. A mole of hydrogen gas (H₂) is compared with a mole of lead (Pb). You can be certain that the…

A: One mole represents 6.023 x1023 particles. So, one mole of a substance = 6.023 x1023…

Q: A student weighs a sample of carbon on a balance that is accurate to 0.001 g. (a) How many atoms…

A: The mass of carbon (C) is 0.001 g and the molar mass is 12.01 g. The no of moles of C are:  n = 0.01…

Q: Dichlorodifluoromethane (CF2CI2) is an Ozone-depleting substance. It belongs to a class of compounds…

A: Atomic Weight of C = 12.01g/mol Atomic mass of Fluorine = 19.0g/mol Atomic mass of Chlorine =…

Q: How many chlorine atoms are in 12.2 g of CCl4?(a) 4.77 * 1022(b) 7.34 * 1024(c) 1.91 * 1023(d) 2.07…

A: Consider the 12.2 g of CCI4 Calculate the molar mass of CCI4 as follows: Molar mass = Atomic mass of…

Q: A 67.2-g sample of a gold and palladium alloy contains 2.49x10^23 atoms. What is the composition (by…

A:

Q: A brass alloy contains 87.7% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

A:

Q: The atomic mass of titanium (Z = 22) is 47.87 amu. How many atoms are present in 45.5 g of titanium?…

A: Mole of a substance or a mole of a particles is defined as exactly 6×10^23 particles which may be…

Q: (a) Atoms are very small compared to objects on the macroscopic scale. The radius of a nickel atom…

A:

Q: By x-ray diffraction it is possible to determine the geometric pattern in which atoms are arranged…

A: Given that : The edge length of the cube = 0.409 nm The density of silver = 10.5 g/cm3 The molar…

Q: A sample of pure silver has a mass of 15.4 g. Calculate the number of moles in the sample and silver…

A: Given-> Mass of Silver = 15.4 gm

Q: Determine the number of atoms in 27.0 grams of bromine, Br. (The mass of one mole of bromine is…

A: Given : mass of 1 mole of bromine i.e Br = 79.90 g And mass of Br = 27.0 g

Q: A block of gold (Au) has the dimensions (I × b x h) = 0.7600 in x 8.558 mm x 1.816 cm. 1 in = 2.54…

A:

Q: Determine the number of atoms of C in 24.8 grams of CH1206- atoms 1 3 4 C 7 9. +/- x 100 2. 5

A: Given : Mass of carbon = 24.8 g Compound = C6H12O6 To Find : Number of atoms Solution : Number of…

Q: Number of atoms of Carbon in 9 moles of C4H10 are: O 24.09x10^23 O 3.74x10^23 O 216.79x10^23 O…

A: Avogadro's number is the number of units in one mole of any substance ( molecular weight…

Q: Which of the following contains the MOST atoms? You shouldn't need to do a calculation here. A. 10.0…

A: Generally the no. of atoms present in some sample is obtained by dividing the sample weight by the…

Q: Hydrogen peroxide (H2O2) is a mild antiseptic used to prevent infection in minor cuts and scrapes.…

A:

Q: The Avogadro number is defined as A The number of electron in 12g of C-12 substance B The number of…

A: The question is based on the concept of avogadro  number. we have to correctly identify the…

Q: Beryl (emerald) is a precious gemstone with the formula:  Be3Al2(SiO3)6.  MM Be3Al2(SiO3)6  =…

A: a. Given, 1.00 g of beryl

Q: A 1.98 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 2.71 x 1022…

A:

Q: Find the number of P atoms in 0.200 g of P4. (P=30.97) 3.89 x 1021 O 9.70 x 1026 6.02 x 1023 1.12 х…

A:

Q: A 3.69 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 5.05 x 1022…

A: a.The total number of nitrogen atoms in 3.69g sample of nitrous oxide is calculated as,

Q: In comparing 1 mole of carbon atoms to one mole of magnesium atoms, which statement is TRUE?…

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.