Suppose you have a glass of water with 15 ppb of lead in it. How many atoms of lead ar in the glass of water? Assume you have a 250 ml glass of water. Desnity of water is 1.00 g/ml.

Q: A sample of limestone and other soil materials was heated, and the limestone decomposed to give…

A: Given -> CaCO3(s) -----> CaO(s) + CO2(g)  Weight of sample = 2.237 gm  Weight of CO2 formed =…

Q: Use the following information to answer questions 3.2, 3.3, and 3.4.Calcium phosphide (Ca3P2) and…

A: Solution- Ca3P2(s) +6 H2O(l) →3Ca(OH)2(aq) +2 PH3(g)(a)-by the above given reaction 1mole of Ca3P2…

Q: Consider the equation:  2 Na + 2 H2O → 2 NaOH + H2.  If 92.0 g of sodium is reacted with 76.0 g of…

A: Two mole of sodium react with two mole of water and produced two mole sodium hydroxide and one mole…

Q: The US Environmental Protection Agency (EPA) places limits on the quantities of toxic substances…

A:

Q: A particular brand of beef jerky contains 0.0552% sodium nitrite by mass and is sold in an 8.00-oz…

A: The concentration of any solution can be shown by either expressing its molarity, molality,…

Q: Suppose a piece of silver jewelry contains 7.78×1022 atomsatoms of silver (AgAg).

A:

Q: How many grams of O2 will be consumed during the formation of 11.31 grams of Fe2O3? Report your…

A: Number of atoms, ions and molecules present on a given amount can be determined by “Mole Concept”.…

Q: Suppose that 6.71 × 10³ g of titanium(IV) chloride is reacted with 2.45 × 10° g of oxygen. Calculate…

A:

Q: 100.0 g lead(II) nitrate is reacted with 50.00 g potassium iodide (in plenty of water). How many…

A: The chemical equation for the reaction between lead(II) nitrate and potassium iodide is given as -…

Q: What was the percent of potassium chlorate in the mixture

A:

Q: In the spring of 1984, concern arose over the presence of ethylene dibromide, or EDB, in grains and…

A: The mass and moles of EDB in one flour is calculated as,

Q: You wish to prepare 205 grams of 14.3 % MgSsO4- You will need grams of magnesium sulfate and mL of…

A: Given that, % of MgSO4 = 14.3%  ,  Total mass = 205 gms Also, % of MgSO4 = Mass of MgSO4Total…

Q: Sand is mainly silicon dioxide. When sand is heated with an excess of coke (carbon), pure silicon…

A: Given : Silicon dioxide reacts with coke i.e carbon to produce silicon and carbon monoxide. Hence…

Q: How many grams of titanium(IV) hydroxide, Ti(OH)4, will contain 3.4 x 1025 hydroxide ions? Work…

A: The compound given is titanium (IV) hydroxide.The formula of the compound is Ti(OH)4.The number of…

Q: What mass of water is contained in a 5.398_g sample of Na22CO3.10H2O?

A: The mass of the sample is 5.398 g.The molar mass of Na2CO3.10H2O is 286 g/mol.The mass of water in…

Q: Part 2: The Concept of Limiting Reactant 2. Water is formed by burning H2 (g) in the presence of O2…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: A beaker contains 100.0 mL of water. To it is added 10.0 mL of dilute nitric acid (HNO3). Calculate…

A: Volume of water = 100.0mL  Volume of dilute nitric acid = 10.0mL Total volume = 110 mL  Density of…

Q: If each of the 100 million automobiles contains 1.3 kg of CFC−12 and leaks 29 % of its CFC−12 into…

A: Given : Mass of CFC-12 in each automobile = 1.3 Kg Mass percent of CFC-12 that leaked per year = 29…

Q: An air conditioner compressor contains pure CClF3, also known as the refrigerant R-13. CClF3 has a…

A: We know that, density can be expressed as the mass per unit volume, i.e.…

Q: In the wintertime, it is common to sprinkle a salt, such as NaCl or MgCl2, on icy roads and…

A: In the wintertime, it is common to sprinkle a salt, such as NaCl or MgCl2, on icy roads and…

Q: A sample of rubbing alcohol solution contains ethanol, C2H5OH(l). If the sample contains 1.25 × 1023…

A: Given;

Q: How many sodium ions are present in 20.0 mL of 0.10 M Na,S? A. 0.002 В. О.004 С. 1.20 х 1021 D. 2.41…

A: Given  Volume = 20 mL               = 20 × 10-3 Liter           ( 1 mL = 10-3  Liter )…

Q: 5 g of hydrated barium chloride is heated in a crucible until the mass of the sample no longer…

A: Given: Mass of hydrated barium chloride = 5 g Mass of sample after heating = 4.26 g The loss of mass…

Q: Limewater, a weak solution of calcium hydroxide, Ca(OH)2(s), is used to detect the presence of…

A: Given:- No of formula units of calcium carbonate in the solution= 8.7 x 1019 No of moles of  calcium…

Q: Imagine that you perform a combination reaction between 60.0 g of sodium metal (Na) with 10.0 g of…

A:

Q: How many total moles of ions are released when the following sample dissolves completely in water?…

A: Given : Mass of Ca(NO3)2 = 3.50 X 10-3 g The dissolution reaction of Ca(NO3)2 can be written as,…

Q: A 10.5 g sample of lithium is reacted with 18.5 g of fluorine to form lithium fluoride: Li + F2 →…

A: Given, A 10.5 g sample of lithium is reacted with 18.5 g of fluorine to form lithium fluoride:Li +…

Q: The maximum dose of sodium hydrogen phosphate (Na2HPO4, molecular mass = 142.0 amu) that should be…

A: Na2HPO4 (s) → 2Na+ (aq) +  HPO42- (aq) mass of Na2HPO4 = 3.8g moles of Na2H2PO4  = mass in g / molar…

Q: 5.35 g of potassium chlorate is reacted with 1.54 g sulfuric acid to form chloric acid and potassium…

A:

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".