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121.760
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How is pewter made?
There are two formulas, one containing 71.5 parts of tin to 27.8 of lead, the other 78.2 of tin to 21.7 of lead. I work with Pewter in hard Tech/ Metal works, Unleaded Pewter is made of Tin(soft metal) Copper(used in many alloys) and Antimony(metalloid). Pewter is made of the materials above
What is the empirical formula of a compound that is 50.7 percent antimony and 49.3 percent selenium by weight?
We assume 100 grams of the compound and turn those percentages into grams and get the moles. 50.7 grams antimony (1 mole Sb/121.8 gram) = 0.41626 moles antimony ================================ Now, the smallest mole number (antimony) becomes 1 and the other number is divided by it(antimony) to get the empirical numbers. 0.62467 moles Se/0.41626 moles Sb = 1.5 ----------------so, this happens sometimes and this is what we do (SbSe1.5)*2 = Sb2Se3 -----------------The empirical formula Antimony selenide
What is the oxidation number of antimony in Sb2O5?
The oxidation number of antimony in Sb2O5 is +5. Each oxygen atom has an oxidation number of -2, so the total contribution of oxygen is -10. Since the compound is neutral, the sum of oxidation numbers must be zero, leading to +5 for antimony.
What is the percent composition of oxygen in lead2 nitrate?
The molecular formula for lead(II) nitrate is Pb(NO3)2. To calculate the percent composition of oxygen in lead(II) nitrate, you need to consider the molar mass of oxygen in the formula. Since there are three oxygen atoms in one formula unit of Pb(NO3)2, the percent composition of oxygen can be calculated as (3 x oxygen atomic mass) / (molar mass of Pb(NO3)2) x 100%.
What is the balance chemical equation for the reaction between nitric acid and antimony?
The balanced chemical equation for the reaction between nitric acid (HNO3) and antimony (Sb) is: 6 HNO3 + 2 Sb → 2 Sb(NO3)3 + 3 H2O
What is the density of 2 percent milk?
1 cup of 2% milk has about 5 grams of fat on average.
What is the volume of a 2 g block of lead?
The density of lead is 11.34 g/cc Therefore the volume of 2 g of lead will be 2/11.34 = 0.1764 cc
How do you calculate percent abundance for antimony?
The atomic mass of an element is the weighted average of the masses of its isotopes. You know that: Antimony-121 has a mass of 120.9038 u, x% abundance Antimony-123 has a mass of 122.9042 u, y% abundance There are only 2 isotopes for antimony and their percent abundances should add up to 100%. In other words: x% + y% = 100% y = 1-x (percentages written as decimals) So, now let's put everything together. In order to calculate the atomic mass, multiply the percent abundance of an isotope by its atomic mass; then add the product of all the isotopes: (Atomic Mass of Antimony-121)(Percent Abundance of Antimony-121) + (Atomic Mass of Antimony-123)(Percent Abundance of Antimony-123) = Atomic Mass of Element Antimony (120.9038 amu)(x) + (122.9042 amu)(y) = 121.760 amu Replacing 1-x for y gives: (120.9038 amu)(x) + (122.9042 amu)(1-x) = 121.760 amu Solve for x: 120.9038x + 122.9042 -122.9042x = 121.760 amu -2.0040x = -1.1442 x = 0.57096 = 57.096% Solve for y: y = 1 - x y = 1 - 0.57096 = 0.42904 = 42.904%
How is pewter made?
There are two formulas, one containing 71.5 parts of tin to 27.8 of lead, the other 78.2 of tin to 21.7 of lead. I work with Pewter in hard Tech/ Metal works, Unleaded Pewter is made of Tin(soft metal) Copper(used in many alloys) and Antimony(metalloid). Pewter is made of the materials above
Chemical formula antimony iii iodide?
Sn+3 S-2 <--- these are the ions and their charges Sn+3 Sn+3 S-2 S-2 S-2 <--- the charges have to add up to zero, so two +3 antimony ions cancel out three -2 sulfur ions Sn2S3 <--- simplify Note that Antimony III sulfide is also called stibnite or antimonite
How many electrons are in the first shell of Antimony?
2
What is the empirical formula of a compound that is 50.7 percent antimony and 49.3 percent selenium by weight?
We assume 100 grams of the compound and turn those percentages into grams and get the moles. 50.7 grams antimony (1 mole Sb/121.8 gram) = 0.41626 moles antimony ================================ Now, the smallest mole number (antimony) becomes 1 and the other number is divided by it(antimony) to get the empirical numbers. 0.62467 moles Se/0.41626 moles Sb = 1.5 ----------------so, this happens sometimes and this is what we do (SbSe1.5)*2 = Sb2Se3 -----------------The empirical formula Antimony selenide
How much of copper and zinc is in pewter?
None. It's 92% tin and the remainder is antimony and bismuth (8%). "Today newly manufactured pewter should be a lead free alloy usually being hardened with additions of antimony and copper, containing over 90% tin. Other elements such as silver and bismuth are sometimes used. In the past pewter often contained lead but as awareness has grown into the harmful effects of lead it should now have been eliminated."
Sb plus O2 how is this balanced?
To balance the equation Sb + O2 -> Sb2O3, you need to have 4 molecules of antimony (Sb) and 3 molecules of oxygen (O2) on each side of the equation. This gives you 2 antimony atoms combining with 3 oxygen molecules to form 2 molecules of antimony oxide.
What is the noble gas shorthand of antimony?
[Kr] 4d10 5s2 5p3
What is the noble gas configuration of antimony?
The noble gas configuration of antimony is [Kr] 4d^10 5s^2 5p^3. This means that antimony has 3 valence electrons in its outermost energy level.
What is the noble gas configuration for antimony?
The noble gas configuration for antimony (Sb) is [Kr] 4d^10 5s^2 5p^3.
