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What mass of H2O is produced when 12.0 grams of HCl react completely in the equation 6HCl Fe2O32FeCl3 3H2O?
The (already) balanced reaction equation itself (assuming that there should be an arrow in the equation between "3" and "2") shows that 3 moles of water are produced from every 6 moles of HCl that is reacted. The gram molecular mass of HCl is 36.46 and that of water is 18.02. Therefore, the ratio of the mass of water produced to the mass of hydrogen chloride reacted is [3(18.02)]/[6(36.45)], or 0.2472, to the justified number of significant digits. (The integers "2" and "3" in the ratio are exact.) The mass of water produced is therefore (0.2472)(12.0) or 2.97 grams, to the justified number of significant digits.
What is the mass of 2.00 mol h2o?
0.8 moles HNO3 (63.018 grams/1 mole HNO3) = 50 grams nitric acid ===============
What is the number of moles in 4.50 grams of H2O?
There are four molecules of water in 4H2O. One molecule of water is written as H2O. The subscript 2 tells you that there are two H(hydrogen) atoms. Since there is no subscript after the O there is one O(oxygen) atom. Now back to 4H2O. The coefficient 4 tells you there are four molecules of H2O. Therefore there are eight H(hydrogen) atoms and four O(oxygen) atoms.
What the balance of H2O2 H2O O2?
The balanced chemical equation for the decomposition of hydrogen peroxide (H2O2) into water (H2O) and oxygen gas (O2) is: 2 H2O2 -> 2 H2O + O2. This means that for every 2 moles of hydrogen peroxide, 2 moles of water and 1 mole of oxygen are produced.
How many moles of water are needed to react with 2.2 moles of Li2O?
The balanced chemical equation for the reaction between water and Li2O is 2 H2O + Li2O -> 2 LiOH. It shows that 2 moles of water react with 1 mole of Li2O. So, 2.2 moles of Li2O would require 4.4 moles of water for complete reaction.
How many moles of water are on 72.08g of H2O?
To determine the number of moles of water in 72.08g of H2O, we first need to calculate the molar mass of water (H2O). The molar mass of water is approximately 18.015 g/mol (2 hydrogen atoms with a molar mass of 1.008 g/mol each, and 1 oxygen atom with a molar mass of 16.00 g/mol). Next, we use the formula: moles = mass / molar mass. Plugging in the values, we get moles = 72.08g / 18.015 g/mol ≈ 4 moles of water. Therefore, there are approximately 4 moles of water in 72.08g of H2O.
How many moles of water are there in 100 grams of water?
First you find the Molar Mass of water using the values on the periodic table.2 Hydrogen + 1 Oxygen2*1.01 + 16.00 = 18.02 g/molThen using factor-label to cancel out units(100g H2O)*(1 mol H2O / 18.02 g H2O) = 5.54938957 molSo the number of moles in 100g of H2O is about 5.55 moles.Hope that helps.
How many moles of H are in 2.95 moles of water?
2.95 mole H2O (2 moles H/1 mole H2O) = 5.90 moles hydrogen ------------------------------
How many GRAMS of hydrogen are present in 2.08 moles of water?
In 1 mole of water (H2O), there are 2 moles of hydrogen (H). This means that in 2.08 moles of water, there are 2.08 x 2 = 4.16 moles of hydrogen. To convert moles to grams, we use the molar mass of hydrogen: 4.16 moles x 1.01 g/mol = 4.22 grams of hydrogen.
How many moles are in 35.1 grams of water?
To teach you how to do this problem: 1. Look at the Periodic Table. O =16 grams/mole, H =1.01 grams/mole 2. Calculate the Molecular Weight of Water. 1*O + 2*H: 16+2.02=18.02g/mole 3. Divide the mass of what you have by the Molecular Weight: 35.1g H2O/(18.02 g H2O/mole H2O) 4. The units g H2O cancel leaving you with mole H2O. 5. 35.1 grams H2O= 1.95 moles H2O
How many grams of water are needed to react with 492 g of calcium carbide?
Assuming pure calcium carbide: CaC2 + 2 H2O → C2H2 + Ca(OH)2 Molar mass of CaC2 = 64.1 Molar mass of water =18 ∴ no mol of CaC2 = 492/64.1=7.68mol ∴ no mol H2O =2*7.68=15.35mol ∴mass H2O = 15.35*18 = 276.3g of water
How many moles of Hydrogen are im 2.5 moles of H2O?
2.5 moles H2O (2 moles H/1 mole H2O) = 5 moles of hydrogen
How many moles are in 3.6 g H2 O?
Number of moles are calculated using the equation n=m/M where n is the number of moles, m is the mass of the substance and M is the molar mass of the substance. Molar mass of water = 18 g mol-1 Number of moles of water = 3.8 g /18 g mol-1 = 0.21 mol Number of moles of H in H2O =2 (the subscript next to the chemical symbol of an element indicates the number of moles of that element in that molecule) Number of moles of H in 3.8 g of H2O = 2 x 0.21 mol = 0.42 mol
How many moles of hydrogen atoms are present in 25 grams of water?
For this you need the atomic (molecular) mass of H2O. Take the number of moles and multiply it by the atomic mass. Divide by one mole for units to cancel. H2O= 18.0 grams2.5 moles H2O × (18.0 grams) = 45.0 grams H2O
6.00 g water contains how many moles?
For this you need the atomic (molecular) mass of H2O. Take the number of grams and divide it by the atomic mass. Multiply by one mole for units to cancel. H2O= 18.0 grams.417 grams H2O / (18.0 grams) = .0232 moles H2O
How do you calculate the formula of hydrated Barium Chloride given that a sample of 10g of BaCl2.nH2O crystals lost 1.475g of of water on heating?
Mass of BaCl2 = crucible + lid + BaCl2.nH2O - empty crucible + lidMass of water contained in hydrated BaCl2: Initial mass - final massNo. of moles of H2O in hydrated salt = No. of moles = mass of H2O/formula mass of H2O Use this answer in ratioNo. of moles of BaCl2 in 3.399 g = No. of moles = mass of BaCl2/formula mass of BaCl2 Use this answer in ratioThe ratio of BaCl2 to H2O is 1 : 2
What compound has a molar mass of 18 grams?
Water. Remember the equation Moles = mass(g) / Mr (Relative Molecular Mass) So Molar Mass(g) is = to moles X Mr. or Mr = mass(g) /moles Since ther mass is 18 g and molar mass is 1 mole Then substitute Mr = 18g / 1 = 18 So referring to the Periodic Table. for elements with an atomic below 18 . We have oxygen at 16 and hydrogen at 1 So 16 + 1 + 1 = 18 . Hence oxygen + 2 hydrogen = water (H2O).
