Calculate the mass, in grams, of 752 atoms of lithium, Li (1 mol of Li has a mass of 6.94 g). with the correct amount of sig figs

Q: Cyanocobalamin( vitamin B12) contains 4.34% cobalt by mass. what is the ,olar mass of…

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Q: Determine the mass in grams of 5.28 × 10²¹ atoms of barium. (The mass of one mole of barium is…

A: Given, Number of barium atoms =5.28×1021 atomsmass of one mole of barium =137.33 gwe are asked to…

Q: Which has the smaller mass, 1 mole of He atoms or 4 moles of H atoms?

A: Molar mass of He = 4.003 g/molMolar mass of H = 1.007 g/mol

Q: Calculate the mass % of O in beryllium perchlorate.

A: We have to calculate the oxygen % in beryllium perchlorate.

Q: A chromium containing compound has a formula FexCryO4 and is 28.59% oxygen by mass  Find x and y

A: Given, mass percentage of O in FexCryO4 = 28.59%Molar mass of 4 O in FexCryO4 = 4 × 16 g/mol = 64…

Q: A compound contains only nitrogen and oxygen and has aformula mass of 44.02 amu. What is its…

A: The atomic mass of Nitrogen, N = 14.01 amu The atomic mass of Oxygen, O = 16 amu The atomic mass of…

Q: In a 6.43E1 g sample of NaHCO, how many grams of sodium are present? Use two decimal places in…

A: Mass of NaHCO3 = 6.43E1 = 64.3 g

Q: What is the percent by mass of H in isobutyl benzene (C10H14)? The molecular weight of carbon is…

A: Given values: The molecular weight of carbon is 12.0107 g/mol. The molecular weight of hydrogen is…

Q: Up late, a (tired} engineer calculated the molar mass of nitroglycerin (CH<N¬Oo} to be 199 g/mol,…

A: Percentage error can be calculated using calculated and true value of molar mass.

Q: Wwhat is themassin grams of one mole of sulfur? (round to 3 sig figs)

A: The question is based on mole concept. we have to write mass of 1 mole of sulphur atoms.

Q: Given 147.6 g of gold, Au, how many moles do you have? Round to 2 decimal places.

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Q: A white oxide of tungsten is 79.2976% tungsten by mass. A blue tungsten oxide also contains…

A: Let the mass of the white tungsten oxide and the blue tungsten oxide be equal to 100 g. Mass of…

Q: Given 41.5g of gold, Au, how many moles do you have? Round to 2 decimal places.

A: According to the mole concept, one mole of the Substance related to different values as - (1) 1 mole…

Q: A sample of acompound is decomposed in thelaboratory and produces 165 g ofcarbon, 27.8 g of…

A: The given data contains, Carbon = 165 g. Hydrogen = 27.8 g. Oxygen = 220.2 g.

Q: What mass of ammonia gas (NH3) contains 2.8*10^24 hydrogen atoms?

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Q: Calculate the mass of diphosphorus pentoxide (P2O5) that contains a million (1.0x1023) oxygen atoms.…

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Q: Find the percentage of mass of sodium (Na) in Na2s if it is 32.1%  sulfur (s) by mass.

A: The percentage of mass of an element in a compound is calculated by the formula,

Q: e the mass in grams of CO, tha

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Q: given a 81.9 mol sample of Ne, how many atoms are present?

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

Q: A 1.45-g sample of phosphorus burns in air and forms 2.57 g of a phosphorus oxide. Calculate the…

A: Empirical formula represents the simplest whole number ratio of elements present in a compound while…

Q: Calculate the mass % of O in calcium periodate

A: The molecular formula of calcium periodate is Ca(IO4)2.  We know the molar mass of calcium…

Q: A sensitive electronic balance candetect masses of 1 × 1 0 -8 g. How many atoms of silverwould be in…

A: In order to calculate the number of atoms of an element present in a given amount we first need to…

Q: A compound is made by carbon, hydrogena and nitrogen and 1 g of this compound contains 91.5 mg of…

A: To write the molecular formula of the compound, the number of moles of each element should be…

Q: 1. Convert 61.51 a of He to moles of He

A: Number of moles = mass/molar mass    Since you have posted multiple questions, we are entitled to…

Q: A hydrated form of copper sulfate (CUSO, · xH,O) is heated to drive off all of the water. If there…

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Q: Assume that the ratio of moles of Cl to moles of Cu are 2.7.  If we can represent the formula by…

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Q: Calculate the mass percentage of oxygen in the organic molecule whose line structure is shown below.…

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Q: Determine the number of atoms in 31.0 grams of calcium, Ca. (The mass of one mole of calcium is…

A: Interpretation-  To determine the number of atoms in 31.0 g of calcium ( Ca ) molar mass is already…

Q: Determine the mass in grams of 3.75 × 10²¹ atoms of zinc. (The mass of one mole of zinc is 65.39 g.)…

A: Mass of one mole of zinc is 65.39 g. Number of atoms of zinc are 3.75×1021 .

Q: The formula for alum has 1 Al. How many units alum could be made from 7 Al atoms? Answer with a…

A: The molecular formula of alum is K2(SO4)·Al2(SO4)3·24H2O or KAl(SO4)2·12H2O

Q: A sample of a compound containing only magnesium and oxygen is found to have 194g Mg and 256 g of O…

A: The percentage of Magnesium and oxygen are calculated as,

Q: Calculate the mass, in grams, of 962 atoms of cadmium, Cd (1 mol of B has a mass of 112.41 g). with…

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Q: The total count of atoms in 1.3 mol of argon in its elemental form is:

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Q: 4. If the manufacturer of Remdesivir has access to 1394 g of phosphorus atoms, how many grams of…

A: The chemical formula of Ramdesivir: C27H35N6O8P. The given mass of phosphorus atoms = 1394 g Atomic…

Q: The number of particles in 1 mole is called ? b) The value of the mole is equal to the number of…

A: No of particles = mole × avagadro number.   Mass = molar mass × mole.

Q: mass

A: 0.415 mol sample of MnX2O7 has a mass of 85.14 g.  What is X?

Q: l,652g 47,7129 Mass of copper chloride, g Mass of empty evaporating dish, g 48.4929 48.4929 Mass of…

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Q: What does xH,0'represent in the formula AL(S0,);•xH,O? The student heats 12.606g of AL(SOxH,O…

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Q: How many grams of the insecticide calcium chlorate must be measured if a sample is to contain 5.79 g…

A: Formula of calcium chlorate = ca(clo3)2 Molecular mass of calcium chlorate is 207g

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: Seven moles of sulfur dioxide, SO2, would consist of how many molecules?

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Q: an engineer calculated the molar mass of nitroglycerin (C3H5N3O9) to be 196.9 g/mol, but this…

A: Given,  The formula of nitroglycerin = C3H5N3O9  The calculate molar mass of C3H5N3O9 = 196.9 g/mol…

Q: How many grams are in 2.0 x 1044 atoms of C? Enter your answer rounded to four sig figs, without…

A: 1 mole of any substance contains 6.022×1023 1 mole of any substance is the molar masa of that…

Q: Up late, a (tired) engineer calculated the molar mass of nitroglycerin (C3H5N3O9) to be 197.8 g/mol,…

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Q: y grams of O,

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Q: Calculate the mass percentage of oxygen in the organic molecule whose line structure is shown below.…

A: The formula of the above mentioned organic molecule is : C18H34O2

Q: number of N atoms in 0.420 mol NH3 Express your answer in atoms to three significant figures. Iν ΑΣφ…

A: Number of atoms, ions and molecules present on a given amount can be determined by “Mole Concept”.…

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.