General Chemistry Answers

Determine the NO₂ molecules produced from 6.2 moles of O₂

Compute the number of moles of O₂ needed to react with 3.0 moles of NH₃

1.   Aluminum chloride, AlCl₃, is an inexpensive reagent used in many industrial processes. It is made by treating scrap aluminum with chlorine according to the following equation. Please balance the equation.

              __2_ Al _(s)   +  3___ Cl_2(g)                   _2___ AlCl_3(s)

If you start with 3.11 g of Al and 5.32 g of Cl₂, which reagent is limiting? How many grams of AlCl₃ can be produced? During an experiment you obtained 5.57 g of AlCl₃, what was your percent yield

1.   Calcium phosphate, silicon dioxide, and coke may be heated together in an electric furnace to produce phosphorus, as shown in the following equation:

2 Ca3(PO4)2(s) + 6 SiO2(s) + 10 C(s) → 6 CaSiO3(s) + 10 CO(g) + P4(g)

In this reaction, what mass of calcium phosphate would be needed to make 100.0 g of phosphorus? What mass of calcium silicate would be formed as a by-product

A solution of NaCl in 250 grams of water boils at 102. 04 °C (NaCl-58 g/mole) a. What is the concentration of the solution?

b. How many grams of NaCl are present in the solution?

what is the boiling point of a solution prepared by dissolving 2.50 g of biphenyl (c) hid in 85 0g of benzene. the molecular weight of biphenyl is 154 g

1.   Aluminum chloride, AlCl₃, is an inexpensive reagent used in many industrial processes. It is made by treating scrap aluminum with chlorine according to the following equation. Please balance the equation.

              __2_ Al _(s)   +  3___ Cl_2(g)                   _2___ AlCl_3(s)

If you start with 3.11 g of Al and 5.32 g of Cl₂, which reagent is limiting? How many grams of AlCl₃ can be produced? During an experiment you obtained 5.57 g of AlCl₃, what was your percent yield?

C2H4 + 6F2 2CF4 + 4HF

Using the given equation

H2 + F2 2 HF ΔH= -573 KJ

2C + 2H2 C2H4 ΔH= + 52 KJ

CF4 C+ 2F2 ΔH= +680 KJ

What is the percent nitrogen found in TNT (C₇H₅N₃O₆)