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How many moles Fe are in a sample of Fe2O3 that contains 100g O?
Wiki User
∙ 12y ago
100 grams oxygen (1 mole O/16 grams)(2 mole Fe/3 mole O)
= 4.17 moles iron
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Wiki User
∙ 12y ago
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What is the half life of a radioisotope if a 100g sample becomes 50 g after 20 years?
20 years (APEX)
Can someone convert a recipe to moles?
450 g water 100g sugar 30g vinegar 2g salt for vinegar use2.4 g of acetic acid
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100g of marmite contains 11g of salt A serving of 2g -- will contain 0.22g of salt
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it contains a high amount of protein , each 100g noodles , has 20~25 g of proteins
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moles = mass (g) divided by the molecular weight (g/mol) moles = 100g/12.01
If 12.5 grams of the original sample of cesium-137 remained after 90.69 years what was the mass of the original sample?
100g
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275
What compound contains 24.19 Cu 27.05 Cl and 48.76 oxygen?
CuCl19O73 Think about it as 100g. Therefore 24.19g of Cu, 27.05 g of Cl 48.76 g of O moles = mass/RAM Therefore moles of Cu = 24.19/29 = 0.834 Moles of Cl = 27.05/17 = 1.59 Moles of O = 48.76/8 = 6.095 To make biggest one a whole number, multiply by 12, and you get 1,19,73 Therefore CuCl19O73
What is the half life of a radioisotope if a 100g sample becomes 25g after 18 years?
9 years
What is the half life of a radioisotope if a 100g sample becomes 50 g after 20 years?
20 years (APEX)
How many calories in one rasgulla?
A 100g serving of rasgulla contains 186 calories.
Does lettuce have fiber?
Lettuce contains around 0.5g of fibre per 100g
A hydrate is found to have the following percent composition 48.8 percent MgSO4 and 51.2 percent H2O What is the formula and name for this hydrate?
48.8 g MgSO4 & 51.2 g H2O Convert the mass into moles by dividing molar mass for each. Then obtain a ratio of moles of water over moles of Magnesium Sulfate, and you would get 7. MgSO4 . 7H2O would read as Magnesium Sulfate Heptahydrate.
How many grams of calcium carbonate are required to prepare 50.0 g of calcium oxide?
This is a mass stoichiometry problem. Start with the balanced equation: CaCO3 --> CaO + CO2. Do a conversion from 50g CaO to moles: 56g/1mol=50g/x, x=.9 moles. The equation is balanced as written, with all coefficients understood to be 1. So: .9 moles CaO means .9 moles CaCO3. Do another conversion from moles to grams: 100g/1mol=x/.9 moles. Solve for x to get 90 grams. (56g=molar mass of calcium oxide; 100g=molar mass of calcium carbonate.)
What is the molarity of 0.1 normal KMnO4?
The formula mass of KMnO4 is 158.0Amount of KMnO4 = mass of sample / molar mass = 100/158.0 = 0.633 molThere are 0.633 moles in 100g of potassium permanganate.
