Test-2 Chemistry For Engineering-1421-104 01- How many gra prepare 950 ml soluti

Question

Test-2 Chemistry For Engineering-1421-104 01- How many gra prepare 950 ml solution whose concentration is 0.25 M? 02- Write a reaction between magnesium and oxygen? 03- What are the definition of yield, combustion reaction, and Boyle's law? Choose only two. Q4- Calculate the mass of zinc chloride produced by the reaction ms of zinc phosphate (Zn,(PO) are required to between siver chloride and zine, uise the mass of siver chloride 7.88g? Q5-A natural gas has a pressure 6.77 atm and heated to 540 °C Calculate the result temperature when the pressure changed to 3.25 at Q6-Calculte the volume of sulfuric acid with molarity 0.5M and mas equals 100 g?

Explanation / Answer

Ans.1 Molarity = no. of moles/ volume in liter

Given molarity = 0.25M

volume in liter = 0.950L

So, no. of moles = molarity x volume = 0.25M x 0.950L = 0.2375 moles

Also. no. of moles = mass taken/ molar mass

Molar mass of zinc phosphate = 386.11 g/mol

So, mass taken = no. of moles x molar mass = 0.2375 moles x 386.11 g/ mol = 91.7g

So, grams of zinc phosphate required = 91.7g

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