Sucrose Sugar C12H22O11 Heptane One of several components in gasoline C5H12 Sulfuric acid Used in car batteries H2SO4 Asbestos Insulator H4Mg3Si2O9 Dichlorodiphenyltrichloroethane (DDT) Banned pesticide C14H9Cl5 Silicon dioxide Sand SiO2 Iron oxide Rust Fe2O3 Butane Lighter fluid C4H10

Q: Consider a mixture of 10 billion O2 molecules and 10 billion H2 molecules. In what way is this…

A: The 1st mixture contains 10 billion or 109 O2 molecules and H2 molecules. The 2nd mixture has 109…

Q: In 1961, scientists agreed that the atomic mass unit (amu) would be defined as 1/ 12 the mass of an…

A: Since you have posted a question with multiple subparts, we will solve the first three subparts for…

Q: How many MOLECULES of dinitrogen monoxide are present in 4.00 grams of this compound? How many…

A: Given, a) mass of dinitrogen monoxide (N2O) = 4.00 grams Number of molecules of dinitrogen monoxide…

Q: Strontium has 4 isotopes: Sr84 with 0.56% abundance and AMU of 3.9134, Sr86 9.86% abundance with AMU…

A: Let x 1 and x2 be the abundance of Sr87 and Sr88 respectively. Then we have Strontium Isotopes…

Q: You gave 4.5 × 1025 aluminum atoms . How many moles of aluminum atoms do you have?

A:

Q: An element is composed of tiny indivisible, indestructible particles called atoms. All the atoms of…

A: The first postulate of Daltons atomic theory has been modified as atoms further consists of…

Q: How many moles of calcium atoms do you have if you have 8.13 × 10²¹ atoms of calcium. (The mass of…

A: One mole of any substance contains 6.023×1023 particles. This is called as Avogadro’s number. The…

Q: A mole of a substance is defined as the amount of substance contained in 12 grams of carbon the…

A:

Q: Calculate the mass of H2SO4.

A: Mass of H2SO4 is 98.

Q: A hypothetical element, E, has two stable isotopes. One isotope has a natural abundance of 66.909%…

A:

Q: Calculate the total number of N atoms in 23.8 g N2O5. O 2.65 x 1023 total N atoms O 9.31 x1023 total…

A:

Q: The atomic weight of bromine is 79.904, yet no atom of bromine weighs 79.904 amu. Why is this true?

A: Given : The atomic weight of bromine is 79.904, yet no atom of bromine weighs 79.904 amu.

Q: How many moles of phosphorus atoms do you have if you have 5.90 × 1022  atoms of phosphorus. ( The…

A: Given: Atoms of phosphorus is 5.90×1022 Mass of one mole of phosphorous is 30.97 g.

Q: he average atomic masses of some elements may vary, depending upon the sources of their ores.…

A: Explanation Solution Two substances, the percentage of each isotope, are unidentified. As both…

Q: Iron exists in nature as a mixture of predominantly three isotopes: ⁵⁴₂₆Fe (53.94 amu), ⁵⁶₂₆Fe…

A: We have to calculate the percentage of rarest of three isotopes.

Q: Elemental analysis of a compound with molar mass 214.22 g/mol gives the following mass percent…

A: Given data,Percent of C=72.89%Percent of H=4.71%Percent of O=22.41%Molar mass of…

Q: element is simply the mass in grams of that element that is numerically equal to its atomic mass.…

A: Atomic mass:The atomic mass is called mass of the atom or it can also be referred to as the number…

Q: Fill in the blank. One mole of any atomic, ionic or molecular substance is it's respective atomic,…

A: The atomic mass of an element is equal to the mass of one mole of that element. The molecular mass…

Q: Some of the formulas could be either molecular or empirical formulas; however, some can only be…

A:

Q: How many MOLECULES of carbon tetrabromide are present in 7.44 grams of this compound ?   How many…

A: molecular mass CBr4 is 332 g i .e we have 0.0224 mole of CBr4

Q: 6.90 x 1024 formula units of sodium nitrite, NaNO₂ Express your answer with the appropriate units.…

A: Multiple  questions

Q: . He can tell from elemental analysis that the polymer is made up of only three elements: carbon,…

A: To solve this we have to consider the mass of polymer = 100.0g  Then  Mass of C = 56.45 g  Mass of H…

Q: 7.53 × 10^23 molecules of an element has a mass of 88.64 g. What is the identity of this molecular…

A: 7.53 × 1023 molecules of an element have a mass of 88.64 g. This molecular element is to be…

Q: How many moles of calcium atoms do you have if you have 5.60 × 10²¹ atoms of calcium. (The mass of…

A: The question is based on mole concept. We have to calculate moles of calcium.

Q: Gold (Au) has a density of 19.32 g-cm-3. If a spherical gold nanoparticle has a diameter of 50 nm…

A: Density of Gold nanoparticle is 19.32 g/cm3 and its volume is 7*104 nm3.

Q: Aspartame is an artificial sweetener that that is 160 times sweeter than sucrose(table sugar) when…

A:

Q: You take three compounds, each consisting of two elements (X, Y, and/or Z) and decompose them to…

A: The problem belongs to the simplest ratio of masses.

Q: Unknown element, Element X, exists in nature as two isotopes: ^{351}351 X has a mass of 350.9196 u…

A: Average atomic mass=∑i=1n (mass of ith isotope)(%abundance of ith isotope)100 where 'i'…

Q: You can also calculate percent composition from a formula. This is similar to percent abundance in…

A:

Q: A certain organic compound has the formula C8H12O2. A sample of this compound weighs 1.05 grams.…

A: To determine number of atoms of hydrogen in sample We need to calculate moles of sample present .…

Q: Iron exists in nature as a mixture of predominantly three isotopes: 54 426Fe (53.94 amu), 5626Fe…

A: It is given that Iron exists in nature as a mixture of predominantly three isotopes: 5426Fe (53.94…

Q: 1-How many oxygen atoms are there in 1?25 x 1018 water molecules?

A: Number of water molecule = 1.25 × 10^18molecule

Q: How many moles of calcium atoms do you have if you have 5.65 × 10²¹ atoms of calcium. (The mass of…

A: Mol defination:  Mole in terms of particles:  1 mol = Avogadro no.of particles            = 6.02 ×…

Q: A hypothetical element exists as two isotopes: I = 85.50 amu and II = 88.70 amu. If the percent…

A:

Q: Identify the scientific law that is used in the process of balancing chemical equations. the law of…

A: 1. Given that : We have to identify the scientific law that is used in the process of balancing…

Q: An unknown compound has the following chemical formula: where x stands for a whole number.…

A: Chemical formula basically depicts amount of each element present in chemical compound in terms of…

Q: One of the inherently satisfying features of chemistry is that chemical materials form and interact…

A:

Q: Chemical formulas can be written as empirical formulas, molecular formulas, or structural formulas.…

A: The solution is given below -

Q: How many ions are there in 0.042 mole of Ti(CO3)2 formula units?Place your answer in the box using…

A: 1 mole of Ti(CO3)2 can produce 3 mole ions (1 mole Ti4+ and 2 mole CO32-).

Q: 4. A student has been tasked to determine the percent water in thalium (III) nitrate, TI(NO3)3×H2O.…

A: On heating and consequently allowing the hydrate to stand in open air overnight allows the hydrate…

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: Some compounds are more familiarly called by their common names. For example, limewater is Ca•H2O. *…

A: The statement given is "Some compounds are more familiarly called by their common names. For…

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.