n the Dehydration of Inorganic Salt Hydrate, the weight of the dehydrated Epsom salt is 0.258 g and that of water is 0.26 g. Find the moles of water, the moles of Epsom salt and the complete formula of hydrated Epson salt.

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

A: Yes, the Avogadro number is changed and now becomes bigger than previously. Yes, the definition of a…

Q: For 1.88 g of a compound containing only copper and oxygen, CuxOy, a student found that it contained…

A: Mass of copper in the sample is 1.371 g. Molar mass of copper is 63.546 g/mol.

Q: a. Oxalic acid is a crystalline solid with the molecular formula H2C2O4. A sample of pure oxalic…

A:

Q: the atomic masses of 10B and 11 B are 10.012938 and 11.009305 amu, respectfully. The average atomic…

A:

Q: When iron comes into contact with oxygen in the presence of water, it undergoes a chemical reaction,…

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Q: 1. A sample of 2 tsp of sugar (C12H22O11) weighs 9.00 g. a. Record each step needed to calculate the…

A: We can calculate the moles of any substance from the following formula : Moles of substance = mass…

Q: The organophosphate nerve agent A-234 is believed to have the formula C5H8F2NO3P. It is one of the…

A: Molecular formula: C5H8F2NO3P Isotope of organophosphate nerve agent with molecular formula…

Q: Compare your molar mass to the following list think is you unknown metal: omal zinc tin platinum…

A: Required to calculate total heat produced by food burned by using the equation: (1calg.oC)(∆T)(mass…

Q: 1.aDo a mole of Na and a mole of NaCl contain the same number of Na atoms ? Explain your answer .…

A: Same moles of any particle will have same number of that particles .

Q: Give the mass % of carbon in your compound  ___________________18.537956___________ Give the mass %…

A: Let us assume that there is 100 g of a compound. Hence it contains , Mass of carbon = 100 g of…

Q: has a molecular formula of C12H2403. What is the empirical formula of d?

A: Answer:  Molecular formula : the actual  whole number of elements in that compound.   Molecular…

Q: Two thirds of the atom in a molecule of water is hydrogen. What percentage weight of a water…

A: Given: Hydrogen atoms in a water molecule = 2/3 Atomic weight of hydrogen = 1.008 g/mol Atomic…

Q: Calculate the average atomic mass of Amazium, a newly discovered element (Amazium, symbol Az) which…

A: Given :- There are only 2 naturally occurring isotopes of Amazium. Mass of isotope Az-230 = 229.995…

Q: Magnesium exists in nature as three stable isotopes. Suppose you determine that 9.87 moles of…

A: Given - Exact masses of isotopes of Mg 25Mg = 24.9858 amu 24Mg= 23.9850 amu. 26Mg = 25.9826 amu. To…

Q: 24. The total number of sodium atoms in 46.0 grams of sodium is A. 3.01 x 1023 atoms B. 6.02 x 1023…

A:

Q: The natural isotopes of boron have masses 10.0129 and 11.0093 amu, with relative % abundance of 19.9…

A: Given: Mass of one isotope is 10.0129 amu. Mass of second isotope is 11.0093 amu. Relative %…

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: Choose the letters that apply: In the periodic table, where Carbon is 12, it is stating that: a.…

A: In the periodic table, where Carbon is 12, it is stating that:

Q: The compound, X,03, contains element .5 X and oxygen atom combined in a ratio of 2.17 grams of X to…

A: The mass ratio of atom X to oxygen in X2O3 is = 2.17: 1 In the second compound, the mass ratio of…

Q: Suppose instead of burning Mg, pure carbon weighing 3.62, 5.91, and 7.07 g were burned in an excess…

A: The Law of Definite proportion state that The same mass ratio is possessed by the elemental…

Q: How many atoms of calcium are in 1.00 g?

A: Given  Mass of calcium    = 1 gram  Number of atoms = ?

Q: Which of the following statements is/are TRUE regarding paracetamol, C8H9NO2? Select one or more:…

A:

Q: Popol learns in his biology class that human body is approximately 9.5% carbon. How many moles of…

A: Given 9.5% mass percentage. Using this wa can calculate mass of carbon and then moles.  Further…

Q: Chemistry: Sugar Molecules A sugar molecule has twice asmany atoms of hydrogen as it does oxygen and…

A: Sugar is an organic molecule which sweet in taste. It is a form of carbohydrate which is staple in…

Q: a. How many hydrogen atoms are in the picture? Nitrogen? b. Does the formula indicate how many atoms…

A:

Q: What is the balanced equation of the synthesis reaction of benzoin to benzil using the reagent…

A: The balanced reaction of benzoin with nitric acid in presence of acetic acid is given as

Q: If a different nail is coated with a 0.053 cm thick layer of zinc and the surface area of the nail…

A:

Q: - Which of the following nitrogen-oxygen masses is not consistent with the rest, according to the…

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

Q: Ammonium sulfate, , is in fertilizer and replenishes nitrogen to the soil. What is the number of…

A:

Q: A compound is 32.88% C, 4.14% H, 19.18% N and 43.80% O by mass, and it has a molar mass of 219…

A:

Q: This is a lab question, referring to zinc and iodine reacting to form zinc iodide.  If at the end…

A: Law of conservation of mass: The mass of products is equal to mass of reactants throughtout the…

Q: A. Calculate the number of moles for B. Calculate the mass of the each given. 1.) 45g of table sugar…

A: Given: Mass of sugar = 45 g Moles of nitrogen gas = 2.7 moles Standard data: The molar mass of…

Q: 41) A teenage child in Wisconsin throws a chunk of sodium metal into a lake consisting of freshwater…

A: Given: mass of sodium = atomic number of fluorine = 9 kg = 9000 g density of water = 1.01 g/mL…

Q: Q10. Three pure compounds form when 1.50 g samples of element X combine with, respectively, 0.708 g,…

A: To solve this problem first we will calculate the molar mass of X and Z by using the given mass and…

Q: A brass alloy contains 87.7% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

A:

Q: Question 7

A: The molecular formula of acetic acid has to be determined.Molecular formula:The molecular formula is…

Q: Calculate the mass in grams of one mole of each of the following (the mass of a single item is given…

A: Number of particles in 1 mole = 6.023 × 1023 Mass of 1 electron = 9.10938 × 10-28 gm Mass of 1 mole…

Q: For 2.634 g of a compound containing only copper and oxygen, CuxOy, a student found that it…

A: We have to calculate the moles of oxygen.

Q: What is the average atomic mass of a mystery substance that is 27.5 at a mass of 37g and 72.5% at a…

A: Given: Mass =37 g  Percentage %=27.5 % Mass =38 Percentage % =72.5% Average mass=?

Q: 2.2. Boron has two naturally occurring isotopes, 1 B and "B. We know that 80.22% of its atoms are…

A: Answer: 2.2) Atomic weight of 10B 10.0084 u 2.3) Average atomic mass of Boron 10.81 g

Q: What is the sum of the masses of 1 Fe atom + 2 Cl atoms? Enter your answer rounded to four sig figs,…

A: Given : To determine the sum of the masses of 1Fe atom + 2 Cl atoms

Q: Which one of the following statements about the compound C3H4 is CORRECT? Oa. One mole of C3H4…

A:

Q: The molar masses of the four natural isotopes of chromium are 50 g mol-1, 52 g mol -1 53 g mol -1…

A: Given: The molar mass of four isotopes of chromium is 50 g/mol, 52 g/mol, 53 g/mol, and 54 g/mol.…

Q: 41) A teenage child in Wisconsin throws a chunk of sodium metal into a lake consisting of freshwater…

A: Given: mass of sodium = atomic number of fluorine = 9 kg = 9000 g density of water = 1.01 g/mL…

Q: same on both sides of the reaction arrow.

A: In the balance chemical reaction number of atoms of each element in both sides remains same

Q: 4. Calculating Mass of an Element in a Compound. Pitchblende is the most important compound of…

A:

Q: d. What is the % composition of carbon in Excedrin? e. What is the % composition of hydrogen in…

A: From the formula of excedrin, C25H27N5O8, the number of moles of each of the elements is indicated.,…

Q: In comparing 1 mole of carbon atoms to one mole of magnesium atoms, which statement is TRUE?…

A:

Q: Please use the precision of the values in the periodic table link to determine the correct number of…

A: The atomic mass of  He = 4.003 amu The atomic mass of  Fe = 18.998 amu The atomic mass of  Na =…

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.