4. Determine the number of H atoms in 8.50 g of water.

Q: 2. Your unknown hydrate is one of the following substances. Please name each of these hydrates. a.…

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Q: Determine the molarity of a solution formed by dissolving 79.9 g KCl in enough water to yield 750.0…

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Q: Consider the equation:  2 Na + 2 H2O → 2 NaOH + H2.  If 92.0 g of sodium is reacted with 76.0 g of…

A: Two mole of sodium react with two mole of water and produced two mole sodium hydroxide and one mole…

Q: The molar mass of calcium hydroxide, Ca(OH)2, is O 54.02 g/mole O 58.09 g/mole O 114.2 g/mole 74.10…

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Q: A 0.8970 g sample of a mixture of NaCl and KC1 is dissolved in water, and the solution is then…

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Q: A 2.00 g sample of an organic compound contains 0.675 g of carbon. How much carbon would a 4.00 g…

A: ◼️ Given that:  2.00 g of organic sample has 0.675 g Carbon  Carbon in 4.00 g of same organic…

Q: Calculate the number of grams in 2.72 x 10^21 formula units of sodium nitrite

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Q: How many N₂ molecules are present in 0.500 g of N₂? (show your complete calculation). The empirical…

A: One mol of a substance contains 6.022 x 1023 molecules/units of it. The empirical formula is the…

Q: 8. Answer the question below. Use the rubric in the materials for help if needed. You have a 155 g…

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Q: A compound contains, by mass, 81.7% carbon and 18.3% hydrogen. A 0.15 mole sample of this compound…

A: Given  % Carbon  = 81.7 %  % H   =  18.3 %  Number of mole     = 0.15 mole  Mass of compound = 6.6…

Q: The density of water is 1.00 g/mL at 4 degrees Celsius. How many water molecules are present in…

A: First of all calculate the mass of water by using given volume and density of water. Then calculate…

Q: An aqueous NaBr solution has a mass of 140.0 g and contains 28.00 g NaBr. Calculate the mass percent…

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Q: 45. Complete the table. Mass Solute 15.5 g 22.8 g Mass Solvent 238.1 g 183.3 g 215 Mass Solution…

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Q: How many grams of BrBr are in 275 g CaBr2

A: Calcium bromide has a molecular formula: CaBr2 One umole of CaBr2 contains one mole calcium  atoms…

Q: A solution of ammonia and water contains 2.00×1025 water molecules and 7.60×1024 ammonia molecules.…

A: First we need to calculate the hydrogen atoms from both water and ammonia molecules. Then total…

Q: 8. Convert 37.482 g of N₂O4 to nitrogen atoms.

A: In one mole of any substance there are 6.023 * 1023 number of entities present.

Q: 2. How many grams of K2SO4 are there in 0.123 mole of K2SO4? (Hint: you need to calculate the molar…

A: Using molar mass of K2SO4 and mole concept we can solve this problem.

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: Formula of the compound = XBr3 4.737 g sample of this compound contains 5.329×10−2 mol Br

Q: The density of ammonia, NH3, is 7.71 x 104 g/mL. Calculate the number of moles of ammonia in a 31.9…

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Q: You wish to prepare 205 grams of 14.3 % MgSsO4- You will need grams of magnesium sulfate and mL of…

A: Given that, % of MgSO4 = 14.3%  ,  Total mass = 205 gms Also, % of MgSO4 = Mass of MgSO4Total…

Q: A water solution of sulfuric acid (H2SO4) has a density of 1.864 g/mL and is 73.0% H2SO4 by mass.…

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Q: What mass of a 4.00% NaOH solution by mass contains 15.0 g of NaOH?

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Q: 2.43 g sample of MgSO4 hydrate (MgSO4 · x H2O) is heated and 1.19 g of anhydrous MgSO4 remains.…

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Q: Adding helium to a balloon increased its volume from 309.1 mL to 1.695 L. If the final number of…

A: Given data,  Initial volume of helium gas in the balloon ( V1) = 309.1 mL = (309.1/1000) L = 0.3091…

Q: How many molecules are in 4.83×1020 H2O2?   I don't quite understand how to do these calculations. I…

A: Note: Hey there! Thank you for posting the question. Since the unit is not given, we have taken…

Q: Calculate the number of grams in these quantities. 5.17 x 1021 molecules glucose, C6H12O6 64.6 mL…

A: 1) Since moles = number of molecule / Avogadro's number where Avogadro's number = 6.022 X 1023

Q: 452 ggon 1 mole 39.948 argon -11.31 moles argon

A: Unit conversion can be done by doing mathematical calculations with the unit conversion factor.

Q: The molar mass of Fluorine (F) is 19.0 g/mol. Calculate the molar mass of F2. O 6.31 x 10-23 g/mol…

A: Molar mass of a compound is the sum of individual elements multiplied by their molar masses.

Q: What amount in moles is 4.77x10^25 (to the power of 25) molecules?? 1.2.87x10^49 mol 2.79.2 mol…

A: Molecules = 4.77 x 1025

Q: etermine the number of water molecules in 1.00 mole of water.   options:   3.00 × 10–23   none of…

A: The answer is given as follows The according to avogadro laws that one mole of any species contains…

Q: Find the Mass of 3.65 x10² mole K,SO,?

A: Number of moles of K2SO4 = 3.65 × 10–2 mol  Molar mass of K2SO4 = 174.26 g/mol

Q: Adding helium to a balloon increased its volume from 462.0 mL to 1.510 L. If the final number of…

A: Avogadro’s law states that the volume of a gas is directly proportional to its molar amount at…

Q: How many hydrogen atoms are in 3.10×1025 water molecules?

A: The objective of this question is to find out the number of hydrogen atoms in a given number of…

Q: How do I convert 1.95×10^3 mol Hg to g

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Q: 5)_NH; + 0.3359 mol of oxygen will make how many grams of water? NÓ +

A: Moles = Mass / Molar mass Mass = Moles X molar mass.

Q: How many moles of water are in 1.23 x 10^18 water molecules

A: Given-> Number of water molecules = 1.23 × 1018 molecule

Q: How do you find the molar mass of a solute? What do you do with it to find the number of moles of a…

A: Explained as follows

Q: In one analysis, the density of ozone in an air sample was found to be 5.00  10−8 mol/L. What is the…

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Q: How many grams of N2 are needed to make 444 g of NBr3 ?  N2   +   3 Br2   →   2 NBr3   +   44.0 kJ…

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".