A sample of a compound made of elements A and B was analyzed to contain 2.456 g of A and 1.714 g of B. How many grams of B is there in another sample of the compound that has a mass of 4.172 pounds?

Q: A sample of C₂ H₂ has 4.40 × 1024 H atoms. How many carbon atoms does the sample contain? number of…

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Q: How many grams of C are present in 4.19 grams of carbon tetrafluoride?   How many grams of carbon…

A: Given   (i)   Mass of CF4  = 4.19 gram       Mass of carbon = ? (ii)  Mass of F = 4.61 gram…

Q: Kc = 0.00451  for the reaction below at 361 K. N2(g) + 3H2(g) 2NH3(g) What is Kc at 361  K for…

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Q: .........grams of zinc arsenite contains 4.5 x 1024 atoms of arsenic.

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Q: A certain compound contain 59.9 g of carbon, 8.06g of hydrogen, and 32.0g of oxygen. Another sample…

A: Now, mass percent is defined as the mass of the substance divided by the total mass of the sample ,…

Q: Calculate the mass in grams of each elemental sample.(a) 1.32 * 1020 uranium atoms(b) 2.55 * 1022…

A: Mole is defined as the ratio of given mass and molar mass. The unit of mole is mol. It is utilized…

Q: |\ S ১ 0SS 0 ५, ४)0° atonas of gold, Au?

A: As we know that, 1 mole of Ag contains 6.022 × 1023 atoms. Therefore, 4.50 × 1022 atoms will have  =…

Q: Determine the formula of a A 45.94 gram sample of a hydrate of MnSO4 was heated thoroughly in a…

A: Formula of the hydrated complex = MnSO4.7H2O

Q: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu = 1.6605 10-24 g)

A: Given that the mass of copper penny is 2.15 g. The number of moles can be calculated using the given…

Q: In a lab experiment, 5.66 g of Mg reacts with sulfur to form 13.13 g of magnesium sulfide. How much…

A: From data find the how much magnesium sulfide would be formed if 5.66 g of Mg were reacted with…

Q: 3.34×1022 HeHe atoms Express your answer using three significant figures.

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Q: The atomic weight of Ga is 69.72 amu. There are only two naturally occurring isotopes of gallium: 69…

A: Given atomic weight of Ga is 69.72 amu

Q: How many atoms are in a cube of iron that measures 1.5 cm on each side? The density of iron is 7.87…

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Q: A certain mass of carbon reacts with 455.9 g of oxygen to form carbon dioxide. ________ grams of…

A: According to Law of multiple proportions:     C  + O2 → CO2    ----Eqn 1     C  + 1/2O2 → CO…

Q: A birthday party has many balloons. One of the balloons has 25 grams of helium, while another…

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Q: A sample of hydrogen contains 35.3 grams. 1. How many moles of H atoms are there in the sample? 2.…

A: Please note- As per our company guidelines we are supposed to answer only one question. Kindly…

Q: Calculate the number of moles in 4.9 x 103 grams of vitamin C (C6H8O6).

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Q: How many grams of CH3CO2C5H11 must be weighed out to provide 3.22 x 1023 atoms of H? When you input…

A: Mole in terms of particles : 1 mol = 6.022 x1023 particles  where particles =…

Q: 0.155 mol Na Express your answer using three significant figures.

A: Given: The moles of Na = 0.155 mol.

Q: sample of calcium nitride has a mass of 6.78g. How many particles does it contain?  round to 2…

A: Given Calcium nitrate mass 6.78 g Calcium nitrate  molecule formula = Ca3N2 Number of particle = ?

Q: How many atoms are there in (2.18x10^4) g of iron? The atomic mass of iron is 55.85 g/mol. Give your…

A: We have to find out the number of Fe atoms in 2.18×104 g Fe.

Q: What is the mass (in grams) of 6.022*1023atoms of 12C

A: We know that, 1 mol = 6.022 × 1023atoms Thus, we have 1 mol of 12C

Q: If 10 magnesium(Mg) atoms and 10 chlorine(Cl) atoms were to bump into each other, coukd they combine…

A: If 10 atoms of magnesium and 10 atoms of chlorine bump into each other, they will combine to form a…

Q: If 5.180 g of a pure element contains 4.909×1022 atoms, what is the element? The element is: (Enter…

A: 1 mole = 6.022 x 1023 entitiesMass of 1 mole = molar mass

Q: a. How many grams of S are present in 4.41 grams of sulfur hexafluoride? Mass= gS b. How many grams…

A: The mass of the atoms of the element can be calculated by using the ratio of the whole number…

Q: Which of the following samples of gases contains the greatest number of atoms? (Relative atomic…

A: 4th option is correct that is 13.0 g of C2H6

Q: What is the percent by mass of F?

A: Percent by mass of F = (mass of F/mass of compound) × 100%

Q: The atomic weight of Cl is 35.45 amu. There are only two naturally occurring isotopes of chlorine:…

A: Given  The average atomic weight of Cl = 35.45 amu  The weight of 35Cl   = 35 amu  The weight of…

Q: How many grams of CCl4 will contain 36.00 g of carbon? express your answer in decimal notation.

A: Mole of carbon tetrachloride is equal to mole of carbon

Q: A sample of pentane contains 420 g carbon and 84 g hydrogen. Find: 1. total mass of sample: 2. …% of…

A: Pentane is a hydrocarbon with the formula C5H12. It is an alkene containing 5 carbons and 12…

Q: A sample of Hg weighs 90.9 grams. Will a sample of Rb that contains the same number of atoms weigh…

A: The number of species atom will be expressed as the mathematical product species moles along with…

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: How many grams of Mg are there in a sample of Mg that contains 6.21x1023 atoms? grams

A: The amount of Mg present can be calculated as

Q: Use this information to predict a mass for the molecule, carbon tetrahydride (CH₂). Show your…

A: So here given molecule is:-  Carbon tetrahydride=> CH4

Q: You have 2.50 g of each of the following elements: Ca, Cu, Cs, C, and Cr. Which sample contains the…

A: We have to select the sample with largest number of atoms

Q: If 6.045 g of a pure element contains 3.991x1022 atoms, what is the element? The element is: (Enter…

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Q: when 12.259g of a compound containning only copper and oxygen is descomposed it produced 2.410 of…

A: According to law of conservation of mass, total mass of reactants and products in a chemical…

Q: a. How many grams of S are present in 4.88 grams of sulfur hexafluoride? Mass= g8 b. How many grams…

A: Answer:Molecular formula of sulfur hexafluoride:It means, each molecule of SF6 has 1 sulfur atom…

Q: A gold wedding band is 14B, which means it is 58.3% many grams of gdd is in a l6.05g? Guld, Huw band…

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Q: 4) An evil scientist is attempting to split up uranium hexafluoride, UF6, into its componer…

A: Given: Compound= UF6Mass of uranium obtained = 70.5 gMass of fluorine obtained = 36.3 g The…

Q: Analysis of a 20.0 g sample of pure carbon dioxide shows that it contains 5.46 g of carbon. How many…

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

Q: 3.34×1022 HeHe atoms Express your answer using three significant figures.

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Q: Use the References to access important values 1. What is the mass of 9.23x1023 atoms of barium? 2.…

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Q: A sample of Fe weighs 82.9 grams. Will a sample of Ba that contains the same number of atoms weigh…

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Q: Determine the number of atoms in 81.0 grams of calcium, Ca. (The mass of one mole of calcium is…

A: Atomic weight of any element contains contain Avogadro number of atoms. Here mass of 1 mole of…

Q: A 10.00-g sample of a compound containing sulfur and fluorine contains 2.195 g of S.  What is the…

A: First the percent mass of F present in 10 g of sample is calculated as shown below,

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.