Elements and Compounds

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The formula for potassium dichromate is KËÃCrËÃOËÈ. How many grams of oxygen will be in 2 moles of potassium dichromate?

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0224 grams of oxygen are in 2 moles of potassium dichromate.

224 grams of Oxygen will be in 2 moles of Potassium dichromate.

In one mole of potassium dichromate, there seven moles of oxygen. This means in two moles of K2Cr2O7, there are 14 moles of O, or 7 Moles of O2, which equals 224 grams.

224 g are in two moles of potassium dichromate.

The answer is 224,24 g oxygen.

Structure for this is K2Cr2O7. there are 14 moles of O in 2 moles.

Potassium Dichromate. K2Cr2O7 density of 2.67 g/cm3 molecular weight of 294.185 grams per mole

Silver dichromate has the molecular formula of Ag2Cr2O7. Ag corresponds to silver, Cr to chromium, and O is oxygen. The atomic mass of silver dichromate is 431.8 grams per mole (using 4 significant digits).

The answer is 224,141 grams oxygen.

potassium dichromate- K2Cr2O7 12.5 grams K2Cr2O7 *(1 mol K2Cr2O7/294 grams K2Cr2O7)= .0425 mols K2Cr2O7 There's two mols of K (potassium) for every 1 mol of K2Cr2O7 (Potassium Dichromate) so you multiply the K2Cr2O7 by two to get mols of K .0425 mols K2Cr2O7*(2 mols K/1 mol K2Cr2O7)=.085 mols K Multiply by the molar mass of K to get grams .85 mols K*(39 grams/1 mol K)= 3.32 grams potassium

Pure oxygen gas can be prepared in the laboratory by the decomposition of solid potassium chlorate to form solid potassium chloride and oxygen gas. 34.0 g

Nothing is produced, 500g potassium chlorate will be the same 500 g potassium chlorate after reaction. Actually there is no reaction at all.

The formula for potassium hydrogen sulfide is KHS. Another name for this inorganic compound is potassium hydrosulfide. Its molar mass is 72.17 grams per mole, and it is soluble in water.

K2O is potassium oxide. Formula mass = 94g32.6 g x 1 FU/94 g = 0.35 formula units

The atomic mass of Potassium is 39 and that of Sulfur 32. The formula for Potassium Sulfide is K2S therefore the molecular weight of Potassium Sulfide is (39 * 2) + 32 = 110. Therefore one mole of Potassium Sulfide weighs 110 grams. Therefore 3.3 moles of Potassium Sulfide weigh 110 * 3.3 = 363 grams.

This is more of a math question that requires a bit of knowledge of chemistry. So it helps to know the steps of this answer mathematically. Additionally it's worth noting that there are a number of ways to answer this question. The method I provide may take an extra step, but it allows for a better understanding of the process.First we need to know some basic information about potassium permanganate, KMnO4. This basic information can be found on a periodic table, like the one in the link below. The first step is finding the weight of oxygen in one mole of potassium permanganate as a percent. For this you need to know the atomic weights of the elements involved.K: 39.1 gramsMn: 54.9 gramsO: 16.0 grams Ã— 4 atoms = 64.0 gramsKMnO4: 39.1 + 54.9 + 64.0 = 158.0 grams/molSo now we know the weight of one mole of potassium permanganate (158.0 grams). Because we also know the weight of oxygen, we can find the percent of oxygen in the compound by mass.64.0 grams O Ã· 158.0 grams KMnO4 = 0.405 = 40.5%In one mole of potassium permanganate, 64.0 grams of it is oxygen, meaning 40.5% of it is oxygen. Because of the Law of Definite Proportions, we know that in any amount of potassium permanganate, 40.5% of it is oxygen.Then you can set up an equation.40.5% of (some amount of KMnO4) = 27.5 grams oxygenLet's set the amount of KMnO4 as the variable "x".0.405x = 27.5x = 67.9 grams KMnO4

The formula shows that each mole or formula unit contains one gram atomic mass of each of potassium and manganese and four gram atomic masses of oxygen. the gram atomic mass of potassium is 39.0983, that of manganese is 54.9380, and that of oxygen is 15.9994. Therefore, the required answer is: 2.47[39.0983 + 54.9380 + 4(15.9994)] or about 390 grams, to the justified number of significant digits.

The cost of potassium is: Bulk Potassium: $65 per 100 grams Pure Potassium: $100 per 100 grams

The cost of potassium is: Bulk Potassium: $65 per 100 grams Pure Potassium: $100 per 100 grams

The way to calculate a primary standard is with an equation. This equation is M^pdt = (N*V*meq^pb)/1000. For example, for K2Cr2O7, the number is 294,187 grams.

The gram formula mass for KI or potassium iodide is 166.0027 grams per mole. You find this mass by multiplying the atomic masses of potassium and iodine by the number of atoms given for each in the formula, and then adding these two results.

What is the mass, in grams, of 2 × 1012 atoms of potassium?

85 grams of Potassium Nitrate

Atomic mass of potassium, K = 39.1 Amount of potassium is 156.4g sample = 156.4/39.1 = 4.00mol There are 4 moles of potassium in 156.4 grams of potassium.

If the chemical formula of sucrose is C12H22O11 100 g of sucrose contain 176 g of oxygen.

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