Calcium hydride (CaH 2) reacts with water to form hydrogen gas: CaH 2 (s) + 2H 20 (1)→ Ca(OH) 2 (aq) + 2H 2 (g) How many grams of CaH 2 are needed to generate 12.4 L of H 2 gas at a pressure of 0.934 atm and a temperature of 23°C? (Molar Mass of CaH 2=42.09 g) O 10.0 O 8.25 O 11.6 O 14.2 O 6.23

Q: In the combustion of CH4 + 2O2 -> CO2 + 2H2O If 64 grams of methane gas is burned, then how much…

A: The stoichiometric relation in the given balanced chemical reaction is given below. moles of…

Q: Consider a reaction between magnesium metal, Mg, and hydrogen chloride (HCe) to produce aqueous…

A: Applying concept of limiting reagent and mole concept.

Q: The equation shown represents a gas-producing reaction. 2 KNO3 ->> 2 KNO₂ + 0₂ After 3.75 grams of…

A:

Q: Given, Mass of lighter initially: 13.948 g Final mass of lighter: 13.668 g Mass of fuel used:…

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

Q: Hydrogen gas generated by the following reaction is collected at 25.0 °C and fills a 10.0 L vessel…

A: Given :  2Al(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2(g)  Volume of H2 = 10.0 L  Pressure = 1.00 atm…

Q: many liters of chlorine gas at 1 atm and 21°C can be produced by the reaction of 5.91 moles of HCl…

A: The amount of product formed is guided by the limiting reagent.The reaction proceeds according to…

Q: 8 How many kilograms of sodium are needed to produce 2.24 L of hydrogen collected at 23°C and 92.5…

A: Given-> Volume = 2.24 L T = 23°C = 23 + 273 = 296 K P = 92.5 kpa  = 92.5 × 0.01 atm = 0.925 atm

Q: Consider the reaction. TÍCI, (1) + 0,(g) –→ TiO,(s) + 2 Cl,(g) What mass of TiCl, (189.679 g/mol)…

A: The mass of TiCl4 required to produced 12.53 L of Cl2 at STP condition is to be calculated. Given:…

Q: 2 H3PO4(s) --> 3 H2(g) + 2 P(s) + 4 O2(g) Using the reaction above, show step by step how many…

A: Given, 2 H3PO4(s) --> 3 H2(g) + 2 P(s) + 4 O2(g) mass of H3PO4 reacts = 0.7156 grams Volume of…

Q: Calcium hydride (CaH 2) reacts with water to form hydrogen gas:  CaH 2(s) + 2H 2O(l) → Ca(OH) 2(aq)…

A:

Q: The equation for the preparation of Na,PO, from NaOH and H,PO, is shown below. 3NAOH(aq) + H,PO,(aq)…

A:

Q: At 100 kPa and 0 °C, a 5.04 L mixture of methane (CH4) and propane (C3H8) combusts, producing 18.0 g…

A: In this question, we have to Calculate the mole fraction of each gas in the initial mixture.

Q: Acetylene torches are used for welding. These torches use a mixture of acetylene gas, C2H2, and…

A: The answer to the following question is given as -

Q: Nhich list below is an allowable set of quantum numbers for an electron? mi m. 1 +1/2 -1 -2 b 2 -1…

A:

Q: Given the equation: Zn(s) + 2 HCl(aq) -> ZnCl2(aq) + H2(g) If 520 mL of H2 is collected over water…

A: Ideal gas equation is the equation which obeys gas laws under all condition of temperature and…

Q: In the reaction 2KClO3(s) --> 2KCl(s) + 3O2(g) If 22.4 L of oxygen at STP are needed, how many…

A: Potassium chlorate decomposes into potassium chloride and oxygen on heating. The equation for the…

Q: A Haber process reactor contains 25.0% nitrogen and 75.0% hydrogen for the synthesis of ammonia.…

A:

Q: 3. Based on the experimental evidence, how is the heat of neutralization related to the strength of…

A: When acid  and base react  to form salt and water and this reaction is called neutralization…

Q: Acetylene torches are used for welding. These torches use a mixture of acetylene gas, C₂H₂, and…

A: Answer:At constant temperature, relation between pressure, volume and moles of gases is:

Q: In a rigid 2.0 L container, a solid catalyst is used to convert ammonia into nitrogen and hydrogen…

A: Given: Initial Pressure P1 = 2.56 atm Initial Temperature T1 = 25 oC= 298 K Final Temperature T2 =…

Q: mass

A:

Q: What is the type of the following reaction? 2HgO(s)              2Hg(I) + O2(g)   The answer is…

A: The balanced reaction given is, => 2 HgO (s) --------> 2 Hg (l) + O2 (g)

Q: A) A 3.50 liter metal cylinder contains only ethane gas, C2H6. If the pressure in the container is…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Nitric acid is produced from nitrogen monoxide, which is in turn is prepared from ammonia by a…

A: Limiting reagent is the reagent which is consumed in the chemical reaction completely. It decides…

Q: Using stoichiometry, calculate the volume of O2 gas at 1.25 atm and 18.0 ̊C, which forms when 10.5 g…

A: The given reaction is

Q: If 5.50 L of water vapor at 50.2 °C and 0.121 atm reacts with excess iron, how many grams of…

A: Assuming water vapours to behave as an ideal gas, ideal gas equation will be used to calculate the…

Q: 2H3PO4(s) --> 3 H2(g) + 2 P(s) + 4 O2(g) Using the reaction above, show step by step how many liters…

A: Here we are required to find the volume of oxygen gas liberated when 0.7156 g of phosphoric acid is…

Q: 7.00 L of water vapor at 50.2 °C and 0.121 atm reacts with excess iron, how many grams of iron(III)…

A: Volume of H2O = 7.00 L  Temperature = 50.2°C  Pressure = 0.121 atm

Q: Using the Haber process, represented by the balanced chemical equation below, 384 L of ammonia are…

A: Given, N2 + 3H2 ----> 2NH3  Volume of NH3= 384 L  Volume of N2= ?

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.