A chemist has one mole of an unknown molecule. The mass of this sample is 184.1 grams. After doing some tests, the chemist determines that the molecule has 2 bromine atoms in it and one other atom she cannot identify. In other words, the molecule's formula is XBr2, where X is unknown. Based on the mass of the sample, what is atom X?

Q: 4. Many common dry-chemical fi re extinguishers contain ammonium phosphate, (NH4)3PO4(s), as their…

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Q: Chemical analyses conducted by the first Mars Rover robotic vehicle in its 1997 mission collected…

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Q: Consider the following hypothetical atoms: 130 64 1X has 62 electrons and 1Y has 78 electrons.…

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Q: The mass spectrum of an organic compound shows the relative abundances of M to be 58.98% and M + 1…

A: Given,Relative abundance of M+1=14.67%Relative abundance of M=58.98%Natural abundance of…

Q: b. 3.01 x 1023 atoms of Rubidium c. 8.08 x 1022 atoms of Krypton d. 2.997 x 1025 atoms of Vanadium

A: Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: Which of these formulas contain equal numbers of nitrogen atoms? I. Co(NO,), II. (NH,),CO, III.…

A: Answer:- This question is answered by using simple concept of determination of number of atoms of a…

Q: The reaction of sulfur powder (S8) with oxygen gas (O2) results in the formation of one of many new…

A: We know that, molar mass of O = 15.999 g/mol molae mass of S = 32.065 g/mol

Q: What is the mass of the compound C8H18 (Mm = 114.26 g.mol-1) that contains 7.20x1022 hydrogen atoms?

A: Given :- molar mass of C8H18 = 114.26 g.mol-1  Number of H atoms = 7.20 × 1022 atoms   To calculate…

Q: A sample of oxygen gas weighs 28.4 g. How many atoms of oxygen are present in this sample? The…

A: Here we have told that a sample of oxygen gas is weighed at 28.4 g. Now we have to tell how many…

Q: What is the molar mass of magnesium (Mg)? A)24.305 B)54.9380 C)48.610 D)35.45 E)22.99

A: Given      Element  = Magnesium  Molar mass = ?

Q: The mass spectrum of an organic compound shows the relative abundances of M to be 87.83% and M+ 1 to…

A: Relative abundance/intensity of M+1 peak = 11.40 % Relative abundance/intensity of M peak = 87.83 %…

Q: The mass ratio of sodium to fluorine in sodium fluoride ls 1.21:1. A sample of sodium fluoride…

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Q: A sample of Fe(H2PO4)3 that contains 12 000 oxygen atoms must also contain how many phosphorus…

A: Given Number of oxygen atoms = 12000 To find number of phosphorus atoms

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: A student has a sample of zinc that weighs 22.19 g. How many zinc atoms are in this amount of zinc?…

A: The Number of atom present in one mole of an element is equal to the Avogadro's number (6.022×1023…

Q: 6. How many oxygen atoms are in 225 g oxygen gas? a. 4.23 x 104 C. 8.47 x 10:+ b. 6.84 x 10²4 d.…

A: The Given amount of oxygen gas O2 = 225 grams        the molar mass of O2 = 32 g/mol To calculate…

Q: A sample of hydrogen has a mass of 40.2 grams.  How many H atoms are there in the sample?   How…

A: Given that,mass of hydrogen = 40.2 gMolar mass of hydrogen = 2.016g/molmoles of hydrogen = mass of…

Q: A 2.41 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 3.30 x 102…

A: Given: Number of molecules of N2O =3.30×1022 molecules And mass of N2O sample =2.41 g

Q: A sample of CO2 has a mass of 50.0 grams. What is the number of molecules of carbon dioxide in the…

A: We know,Number of mole = mass of sample (g)molar mass (gmol-1)and1 mol = 6.022x1023 molecule

Q: 1. Calculate the mass of each sample. a. 1.05 x 10 26 atoms of neon, Ne(g) b. 8.72 x 1021 molecules…

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Q: The chemical formula for the amino acid glycine is CHŞNO2. Which of the following statements about…

A: Which of the statement is false ?

Q: A mixture consisting only of lithium chloride, LiCl, lithium carbonate, Li2CO3, and lithium nitrate,…

A: Introduction to Elemental Analysis In the process of elemental analysis, a sample of a substance…

Q: 1.The formula mass of the compound between gallium (III) and oxalate ions in g/mol is: Group of…

A: The formula mass of a compound is the total average atomic masses of each atom which is showed in…

Q: Is wood a metal or nonmetal? 2. Is melon a metal or nonmetal? 3. How many protons, electrons and…

A: An atom is the basic and fundamental unit of matter. An atom consists of electron and the nucleus in…

Q: When molecules are represented by molecular models, what does each sphere represent? How big is the…

A: Molecular model is the complete way to specify a given compound.

Q: When Dalton began his calculations to determine atomic masses he had to make a number of…

A: A compound is a substance that is made of two or more elements. Generally the compound may contain…

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: Find the mass of 2.54 X 1023 molecules of Ca(OH)2? Use: Ca = 42.0g, H = 1.15g and O = 15.8g as…

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Q: 1.92 g M2+ ion reacts with 0.158 mol X- ion to produce a compound, MX2, which is 86.8 % X by mass.…

A:

Q: How many fluorine atoms are there in 5.45 x 1028 molecules of carbon tetrafluoride

A: Given: molecules of carbon tetrafluoride CF4=5.45×1028

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 3.48 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 4.76 x 1022…

A:

Q: sample of aluminum contains 2.91 × 1022 atoms of aluminum. What is the mass of this sample?  [Molar…

A: Given that: Molecules of Al = 2.91×1022 atoms  Molar mass of Al = 26.98 g/mol  1 mol = 6.023×1023…

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 sample of C3H8 has 8.00×10^24 H atoms. How many carbon atoms does the sample contain?  What is…

A: Given :- number of H atoms = 8.00 × 1024 atoms  To be calculated :-  No. of C atoms in sample…

Q: Carbon and oxygen form no fewer than five different binary compounds. The mass percentages of carbon…

A: All five compounds are made up of Carbon and Oxygen. As the percentage mass of Carbon of the five…

Q: A macromolecule has an empirical formula of C4H306. The molecular mass for the macromolecule is…

A: Given :- empirical formula of macromolecule = C4H3O6  Molecular mass of macromolecule = 429.21 g/mol…

Q: How many moles would 1.00 x 1023 molecules of methane ( CH4 ) represent? How many Sulfur atoms would…

A: According to avogadro's rule number of molecule present in 1 mole of substance is 6.022×1023, and…

Q: A sulfide of iron is produced when 2.33 g of iron reacts with 1.926 g of sulfur. What is the…

A: Empirical formula of a compound represents the simplest whole number ratio of the moles of the…

Q: 4. A compound with 24.74% (by mass) potassium, 34.76% manganese, and 40.50% oxygen. 5. A compound…

A: (4.)  Let us consider mass of the compound is  100 grams. Given datas ; % of potassium = 24.74%…

Q: Cobalt(II) sulfate heptahydrate has pink-colored crystals. When heated carefully, it produces…

A: The roman number (II) written after Cobalt in the names Cobalt(II) sulfate heptahydrate and…

Q: Two elements X and Y combine to form two compounds with the following compositions: Compound % Mass…

A: In a compound the particular element is present in the weight ratio .

Q: A sample of TNT, C7H5N3O6 , has 7.97 x 1021 nitrogen atoms. How many hydrogen atoms are there in…

A: The details solution for this is provided below in attach image.

Q: Dic orodifluoromethane (CF2C12) is an Ozone-depleting substance. It belongs to a class of compounds…

A: Given that, 10.0 g of CF2Cl2. Also, the atomic weights are  C = 12.01, F = 19.0, Cl = 35.45. 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: The Cullinan diamond was the largest natural diamond ever found (January 25, 1905). It weighed 3104…

A: 6.023× 10^23 is called Avogadro's number. 1 mole of any substance contains Avogadro's number of…

Q: The average mass of one atom of carbon is 2.00 x 10 –23 g. How many carbon atoms are present in a…

A: Given:Mass of one atom of carbon = 2.00 x 10 –23 g.Total mass of sample of carbon = 40.0 g.

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.