Which of the following has the highest percentage composition of oxygen? Na2CO3 LiNO3 Li2O CuO

Q: How many moles of sodium are contained in 99.6 g of Na 2SO 3? 1.43 x 1024 moles Na 0.790 moles Na…

A:

Q: The number of moles of NaCI (sodium chloride) present in 150 mL of 0.0200 mol/L NaCl(aq) is: O a)…

A: In this question, we want to determine the number of moles of NaCl in the Solution. You can see…

Q: Which series of numbers represents the coefficients necessary to balance the equation? AIBR3+K2SO4 →…

A: Step : 1             The required answer is follow as :

Q: What is the total number of nitrogen atoms on the right-hand side of this chemical equation? 3…

A: To understand fully chemical equation reaction must be balanced. In any balanced chemical equation…

Q: How many g are in 35 mg? O 3.5 g O 35 g O 0.035 g O 35,000 g

A: Given,  35mg of any substance.  It converted to gram.

Q: Iron (III) sulfate, FeSO4, is prescribed for the treatment of anemia. How many moles of FeSO4 are…

A:

Q: What is the percentage composition of each element in ammonia, NH3?  82.35% N; 17.65% H  80.55% N;…

A: Ammonia(NH3) molecule contains one  nitrogen and three hydrogen atoms. We have to determine the…

Q: Determine the percentage compo

A: % element = n x atomic mass molecular mass of compound x 100     where     element = Oxygen…

Q: 39. Calculate the number of molecules present in each of the following samples. a. 4.75 mmol of…

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Q: How many H atoms are present in 8.0 g of CH4? O 3.0 x 1023 O 8.3 x 10-25 O 3.7 x 1023 O 1.2 x 1024 O…

A:

Q: Calculate the number of (a) nitrogen molecules (N2 molecules) and (b) nitrogen atoms (N atoms) in…

A: From given data  Mass of N2= 0.111g  Also molar mass of N2= 28 molar mass of N = 14  Formula used…

Q: What is the percentage composition of each element in hydrogen peroxide, H2O2?  7.01% H and 92.99%…

A: Molecular Mass of H2O2  =34g/mol Mass of 2H =2g Mass of 2O = 32g percentage composition of hydrogen…

Q: How many molecules are contained in a glass that holds 490 g of water? How many moles does that…

A: The mass of one mole of molecules is known as molar mass. We know that the molar mass of water is…

Q: What is the total number of oxygen atoms on the right-hand side of this chemical equation? 6…

A: Given chemical equation:                             6CO2(g) +6H2O(l)→ C6H12O6(s) + 6O2(g) Symbol of…

Q: What is the empirical formula of a compound whose percentage composition is found to be 2.20%…

A: Lets assume that the total mass of compound = 100 g

Q: Find the number of particles ( atoms, molecules or ions) in each of the following substances:  1)…

A: Avogadro number represents a number equals to 6.023×1023. 1 mol of a particle contains an Avogadro…

Q: What is the percentage composition of all the atoms in Mg(ClO2)2 (Magnesium Chlorite)?

A: Given, The percentage composition of all the atoms in Mg(ClO2)2 (Magnesium Chlorite) is:

Q: 2. Calculate the percentage by mass of oxygen in the following compounds d. (NH4)2 CO3

A: The mass percentage of an element in a compound is the percent mass of the element in the total mass…

Q: what is the percent by mass of hydrogen in the preservative formaldehyde CH2O 6.713% 53.29%…

A: Given formula is , CH2O Formula mass= 30.026 g/mol

Q: 45). Calculate the percent by mass of each element in the following compounds. HClO₃ UF₄ CaH₂

A: percent by mass of each element in the compound is calculated by the ratio of mass of one element in…

Q: How many moles are in 1.75g 02? O 1.75 g O2 +1 mol/32.02 moles O2 O 32.02 moles O2 O 1.75 g O2 x 1…

A: Recall the expression of moles as follows       moles=given mass of the compoundmolar mass of the…

Q: How many moles of oxygen atoms are present in 5.148 kg of calcium oxalate? O 6.594 x 102 O 1.608 x…

A: A) answer Amount of calcium oxalate- 5.148 kg = 5148 gram Molar mass of CaC2O4 = 40 + 12 ×2 + 64…

Q: Balance the following equation by algebraic method. C2H6 O2 CO2 H20

A: Balancing chemical equations are based on conservation of mass

Q: How many grams of ammonia were produced if 42.9 grams of hydrogen reacted? N2 (g) + 3H2 (g) 2NH3…

A: Given: Mass of hydrogen reacted = 42.9 g Moles of H2 reacted = given massmolar mass…

Q: 1. All of the substances listed below are fertilizers that contribute nitrogen to the soil. Which of…

A: More is the percentage of nitrogen in the compound is the richest source of nitrogen on mass…

Q: A Compound having an approximate molar mass of 165 - 170g has the following percentage composition…

A: There are four compounds hydrogen carbon oxygen nitrogen

Q: Pb（NO2）2 + Mg（NO3）2 please write the balanced equation and its net ionic equation

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Q: 5. How many grams of Oxygen are needed to make 7.1 g of Chlorine? SeCl6 + 02 --> Se02 + Cl2 O 1.1 O…

A: Gien mass of Cl2 produced= 7.1 gThe given balance reaction is:SeCl6 + O2  → SeO2 +3 Cl2 1 mol of O2…

Q: Calculate the percent composition by mass of calcium sulfite, CaSO3 2. Calculate the percent…

A: To Solve this problem we will calculate the percentage composition of each element present in given…

Q: Calculate the number of atoms in 12.45 grams of iron . 1.342 x 1023atoms 1.342 x 1022toms 0.223…

A: The question is based on mole concept. We have to calculate number of atoms of iron.

Q: Which of the following has the highest number of molecules? O 1.0 g of F2 O 1.0 g O2 1.0 g of Cl2 O…

A: We are given that each of compound is 1.0 g, we need to find the compound with maximum number of…

Q: Give the name and calculate the molar mass for each of the following substances. ‍H3PO4 ‍Fe2O3…

A: The question is based on the concept of molar mass determination. We have to calculate molar mass of…

Q: Determine the number of moles of Cl in 2.7 mol CaCl2

A: 1 mole of CaCl2 contains 1 mole of Ca and 2 mole of Cl.

Q: Calculate the percent composition of oxygen in the following compounds: NaOH Al2(SO4)3 CaCO3 MnO2 In…

A:

Q: The chemical formula for octane is: CH; (CH,),CH; 9. Calculate the molar mass of octane. Round your…

A: Octane is saturated hydrocarbon compound which is a component of gasoline i.e pertrol.  It is…

Q: Calculate the number of moles of Cl atoms in 2.41×1024 formula units of magnesium chloride, MgCl2

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: B. TRUE OR FALSE: Read each statement carefully. Write TRUE if the statement is correct and FALSE if…

A: Percentage composition gives a brief ideas about each elemental composition as follows.

Q: A sample of a compound has a mass of 41.13 g. The sample is found to contain 37.28 g of carbon and…

A: The mass of the sample compound is = 41.13 g The mass of carbon in this sample is = 37.28 g The mass…

Q: Find the percentage by mass of oxygen (O) in N2O4 if it is 30.4% nitrogen (N) by mass.

A: We have given that Percent by mass of nitrogen in N2O4 = 30.4% Mass of N2O4 = 92.011 g/mole Percent…

Q: Calculate the percentage composition for KCLO4 ro 3 significant figures

A: The percentage composition of an atom in a compound can be found by the following equation.  % of…

Q: When this equation is balanced with the smallest set of whole numbers, what is the coefficient for…

A:

Q: Calculate the number of atoms present in 5.10x10^-3 mil of copper,Cu

A: Answer:- this question is answered by using the simple concept of calculation of number of atoms…

Q: Calculate the mass of silver bromide produced from 23.2 g of magnesium bromide in the following…

A:

Q: Calculate the moles of anhydrous (dry) KAl(SO4)2 that were present in the sample and the ratio of…

A: Introduction :  Empirical formula is the formula of a compound from which one can find the ratio of…

Q: 2. Calculate the following, with proper number of significant figures: Molar mass of Al(CH3COO)3 is…

A:

Q: How many atoms are contained in 12 g of water? O 2.4 x 1024 O 1.2 x 1024 4.0 x 1023 O 1.3 x 1023

A: To calculate the number of atoms in 12 g of H2O Molar mass of H2O = 18 g/mole Now we calculate moles…

Q: Determine the percent composition by mass of each element in Ba3(PO4)2 . 3, 4 , and 2 are subscripts…

A: percent ratio of mass of element to the molecular mass of compound is known as percent composition.

Q: Calculate the number of (a) nitrogen molecules (N2 molecules) and (b) nitrogen atoms (N atoms) in…

A: Given the mass of nitrogen gas = 0.111g We know that molecular mass of N2 gas= 28g So calculating…

Q: Calculate the number of molecules in 17.8 grams of Carbon Dioxide (CO2)? O 2.11 x 1023 molecules O…

A: Given that, Mass of CO2 = 17.8  To find, the number of molecules in 17.8 g CO2?

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.