30. The active ingredient in some antiperspirants is aluminum chlorohy- drate, Al₂(OH), Cl. Analysis of a 2.000-g sample of antiperspirant yields 0.334 g of aluminum. What percent (by mass) of aluminum chlorohydrate is pres- ent in the antiperspirant? (Assume that there are no other compounds con- taining aluminum in the antiperspirant.) of the male sex hormone, testosterone,

Q: A sample of concentrated nitric acid has a density of 1.41 g/mL and contains 70.0% HNO3 by mass. (a)…

A: Given: Mass % of HNO3=70.0 % Density  = 1.41 g/mL   To calculate: (a) Mass of HNO3 per liter (b)…

Q: Balance the following chemical equations. Fe (s) + _Mg (s) +_________N₂ (g) → _ _KNO3 (s) →→→ KNO₂…

A: Balance chemical equation: balance chemical equation is the reaction in which number of atoms of all…

Q: 16.792 g of Ba(OH)2 (171.342 g.mol-1) is weighed out and carefully dissolved to make a 500.00cm3…

A:

Q: A 30.7 g sample of a mixture of KNO3 and Mg(NO3)2 is treated with an excess of aqueous Na2CO3.  All…

A: Reactions between two salts in which metal ions exchange their anionic radicals is termed as double…

Q: Most vinegar sold in stores is a mixture of 5.0% acetic acid (by mass) and water. What mass of…

A: Given:   The mass percentage of acetic acid is 5.0 %. The mass of acetic acid is 20.0 g.

Q: 7.) A student dissolved 5.00 g of Co(NO3)2 in enough water to make 100. mL of stocksolution. They…

A: Molar mass of Co(NO3)2 is 183 g/mol Hence moles of Co(NO3)2 taken = mass / molar mass = 5 / 183 =…

Q: A powder contains FeSO 7 H₂O (molar mass = 278.01 g/mol), among other components. A 3.630 g sample…

A: The objective of this question is to determine the mass of FeSO4.7H2O in a 3.630 g sample of a…

Q: On a spacecraft, the COp the crew exhales is removed from the cabin by a reaction within canisters…

A:

Q: A 12.3 g sample of an alloy of Mg and Al produces 1.66 mol of H2 when added to excess HCl. What…

A: Given: Total mass of alloy = 12.3 g. And moles of H2 produced = 1.66 mol. Assuming that there are…

Q: Iron forms a sulfide with the approximate formula Fe,Se. Assume that the oxidation state of sulfur…

A: Given that,  An iron sulfide compound with molecular formula = Fe7S8 oxidation state of sulfur = -2…

Q: |Decaborane, BH14, was used as a fuel for rockets in the 1950s. It reacts violently with oxygen, O…

A: The balanced chemical reaction between decaborane (B10H14) and oxygen (O2) can be written as…

Q: rock is to precipitate the phosphorus as MgNH4PO4, which is then heated to tum it into Mg2P2O7. What…

A:

Q: |Solid silver oxide, Ag2O(s), decomposes at tempera- | tures in excess of 300 °C, yielding metallic…

A: The balanced decomposition reaction of silver oxide (Ag2O) at temperature in excess of 3000C can be…

Q: A 12.3 g sample of an alloy of Mg and Al produces 1.66 mol of H2 when added to excess HCI. What…

A: Given, Mass of the sample = 12.3 g  Mass of H2 gas produced = 1.66 mole  What is the percentage of…

Q: (d) sodium cnionae is an ionic compound.  ltcontains sodium ions, Na+ and chloride ions, CI- When…

A:

Q: Write the balanced NET ionic equation for the reaction when aqueous Cs₃PO₄ and aqueous AgNO₃ are…

A:

Q: (b) An unknown mass of Na;PO<(s) is dissolved in water to form 50.00 mL of solution. This is…

A:

Q: 30. The active ingredient in some antiperspirants is aluminum chlorohy- drate, Al₂(OH),Cl. Analysis…

A: To calculate percent by mass , we need 5o calculate the mass of aluminum chlorohydrate.  For this we…

Q: You very carefully heat the compound for an extended period of time to drive off water, after which…

A: (i) Yes, it is correct formula of hydrated salt (ii) Mass of water = 0.2500 - 0.1598   = 0.0902 g…

Q: A 0.8761 g sample of iron ore is dissolved in acid, the iron is oxidized to the +3 state and then…

A:

Q: A 12.3 g sample of an alloy of Mg and Al produces 1.66 mol of H2 when added to excess HCl. What…

A:

Q: 109. Elixirs such as Alka-Seltzer use the reaction of sodium bicar- bonate with citric acid in…

A:

Q: 16.792 g of Ba(OH)2 (171.342 g.mol-1) is weighed out and carefully dissolved to make a 500.00cm3…

A:

Q: A sample of soda ash (impure Na2CO3) is titrated with 0.5000 N H2SO4. If the sample weighs 1.1000 g…

A: Given: The mass of the soda ash sample is 1.10 g. The volume of 0.500 N H2SO4 solution required for…

Q: What mass of sulfate ions is in the sample? What is the mass percent of sulfate ion in the sample?…

A: Step : 1             Calculate the mass and percentage.

Q: A supplement was tested for iron content in a laboratory. First, a random sample of 10 tablets…

A: A question based on mole concept that is to be accomplished.

Q: A solution iodine is such concentration that 20.0 mL are rdquired to titrate the antimony in a 0.100…

A:

Q: (b) An unknown mass of Na3PO4(s) is dissolved in water to form 50.00 mL of solution. This is…

A: The number of moles of Na3PO4 in the 20.00 mL of the solution B is calculated as shown below.

Q: 16.792 g of Ba(OH)2 (171.342 g.mol-1) is weighed out and carefully dissolved to make a 500.00cm3…

A:

Q: ure Fe2O3.  When solid Fe2O3 is heated with an excess of carbon, iron metal, and carbon monoxide are…

A: When Fe2O3 reacts with carbon, pure iron is obtained. The following reaction takes…

Q: Write the balanced COMPLETE ionic equation for the reaction when Na:COs and A9NO3 are mixed in…

A:

Q: 4.) 325 g of H2O is poured onto a 450. g block of sodium metal. The equation for this reaction is:…

A: The limiting reagent is one which consumed first or limit the amount of products form. • in the…

Q: A 0.8571 g sample of iron ore is dissolved in acid, the iron is oxidized to the +3 state and then…

A: The mass of the iron ore sample is = 0.8571 g The mass of iron(III) oxide is = 0.1132 g The molar…

Q: he compound Sb4O5Cl2(s), which has been investigated because of its interesting electrical…

A:

Q: A powder contains FeSO4-7H20 (molar mass=278.01 g/mol), among other components. A 3.825 g sample of…

A: Given : Mass of sample taken = 3.825 g And mass of Fe2O3 produced = 0.532 g Molar mass of Fe2O3 =…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".