81 squares on a sudoku grid
0.25 mole of H2O
Unfortunately, you did not specify what final chemical equation you wanted given these formulas. From the data though I assumed the following: Fe2O3(s) + 3CO(g) à 2Fe(s) + 3CO2 H1 3Fe2O3(s) + CO(g) à 2Fe3O4(s) + CO2(g) H2 Fe3O4(s) + CO(g) à 3FeO(s) + CO2(g) H3 3(Fe2O3(s) + 3CO(g) à 2Fe(s) + 3CO2) 3(H1) 2Fe3O4(s) + CO2(g) à3Fe2O3(s) + CO(g) -H2 2(3FeO(s) + CO2(g) à Fe3O4(s) + CO(g)) 2(-H3) 3Fe2O3(s) + 9 (6)CO(g) à 6Fe(s) + 9(6)CO2 3(H1) 2Fe3O4(s) + CO2(g) à3Fe2O3(s) + CO(g) -H2 6FeO(s) + 2CO2(g) à 2Fe3O4(s) + 2CO(g) 2(-H3) 6FeO(s) + 6CO(g) à 6Fe(s) + 6CO2 3H1 + -H2 + -2H3 FeO(s) + CO(g) à Fe(s) + CO2 [(3H1 + -H2 + -2H3) / 6] FeO(s) + CO(g) à Fe(s) + CO2 -11KJ/mol
The balanced equation is 2KHCO3(s) → K2CO3(s) + H2O(g) + CO2(g). The coefficient of carbon dioxide (CO2) in the balanced equation is 1.
Zn + S ==> ZnSmoles Zn = 25 g x 1 mol/65.4 g = 0.38 moles Znmoles S = 300 g x 1 mol/32 g = 9.38 moles Smoles S in excess = 9.38 - 0.38 = 9.00 molesmass S in excess = 9 moles x 32g/mol = 288 g = 280 g (to 2 significant figures)
To calculate the formula mass of H₂S₂ (hydrogen disulfide), you add the atomic masses of its constituent elements. Hydrogen (H) has an atomic mass of approximately 1.01 g/mol, and sulfur (S) has an atomic mass of about 32.07 g/mol. Therefore, the formula mass of H₂S₂ is calculated as follows: (2 × 1.01 g/mol) + (2 × 32.07 g/mol) = 2.02 g/mol + 64.14 g/mol = 66.16 g/mol. Thus, the formula mass of H₂S₂ is approximately 66.16 g/mol.
S. G. Campbell has written: 'Chlorophyll a concentration and distribution in Twin Lakes, Colorado, prior to operation of Mt. Elbert pumped-storage powerplant, 1977-81' -- subject(s): Limnology, Chlorophyll, Analysis
if the question were 81 S in a S P the answer would be 81 Squares in a Sudoku Puzzle so the extra S letter is a mystery unless 81 Squares in a Standard Sudoku Puzzle as there are other variations
81 = square of nine
1 oz = 28.3495 g
Top dollar 135
The square root of 81 is an integral number.
Gish s gs g s gs g s gs g s gs g s g
G has 81 socks.
That is approximately 16 teaspoons.
You need sand and gunpowder, crafted like this: S G S G S G S G S S = Sand G = Gunpowder
81
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