Chemistry Answers

、What is the main reaction and secondary reaction of steam conversion method to

get syngas？

How many moles of carbon dioxide will be produced by the complete reaction of 2.0 mole of glucose (C6 H12 O6)

A 12.3 cm piece of copper tube has a mass of 36.50 g. What is the length of tube if it has a mass of 110 kg?

A. 200.0 g of Ca(C₂H₃O₂)₂ was found in the chemistry laboratory. 

      Calculate

          i. the molecular mass of 1 mole Ca(C₂H₃O₂) _2.

         ii. the number of  moles of Ca(C₂H₃O₂)₂  that exists   

        iii. the number of Ca(C₂H₃O₂)₂ molecules present

        iv.  the volume at STP  if Ca(C₂H₃O₂)₂ is converted to gas.

        v.  the molarity of a solution made by dissolving 200.0 g of      

                Ca(C₂H₃O₂)₂ in 200 ml of water

b)  Answer the following stoichiometry questions by referring to the equation below:

2 KClO₃    2 KCl + 3 O₂

i.        If 1.50 moles of KClO₃ decomposes, what is the mass of O₂ that will be produced?

ii.       If 80.0 grams of O₂ was produced, how many moles of KClO₃                  are decomposed?

iii.    Find the mass of KClO₃ needed if we need to produce 2.75                                 moles of KCl.

Determine whether the following reactions will occur by determining the voltage produced. (3 marks each)

a. Ag(s) + HCl(aq) 

b. Mg(s) + FeSO4(aq) 

3. The most common method of producing bromine involves oxidizing bromine ions (Br- ) to bromine liquid (Br2) using chlorine gas (Cl2). What is the E for this reaction? 2 marks

1. By what mass (in grams) will a chromium cathode increase when it is coupled to a magnesium half-cell in which the magnesium anode loses 1.53 grams? (assuming chromium ions in solution are Cr3+).

To prevent dehydration, intravenous (IV) solution is given to hospital patients. Commonly used are solutions containing sodium chloride and glucose. A 150.0-mL IV solution contains 6.60 grams of glucose (CHO). What is the molarity of this solution? The molar mass of glucose is 180.16 g/mol.

A certain ion X3+ contains 24 electrons and 32 neutrons. The chemical symbol and the mass number of this ion are:

Write the balanced NET ionic equation for the reaction when Pb(NO₃)₂ and KI are mixed in aqueous solution. If no reaction occurs, simply write only NR.

if the volume of confined gas is doubled while the temperature remains constant, what change would be observed in the pressure?