Other Chemistry Answers

7. Jenny uses 50 N of force to accelerate a block at 25 m/s2, what is the mass of the block?

Calculate the enthalpy of combustion of ethyne (C2H2) from the data below: ΔHf (CO2) = -393kJ/mol , ΔHf (H2O) = -286kJ/mol and ΔHf (C2H2) = -229kJ/mol *

The Tl in a 9.76-g sample of rodenticide was oxidized to the trivalent state and treated with an unmeasured excess of Mg/EDTA solution. The reaction is


Tl3+ + MgY2- → TlY- + Mg2+


Titration of the liberated Mg2+ required 13.34 mL of 0.03560 M EDTA. Calculate the % of Tl2SO4 (504.8 g/mol) in the sample.

The atomic number of element Q is 24

a)write the electronic configuration of the oxide of Q

b) write the formular of the oxide of Q

c)state whether the oxide of Q you have given in b) is basic or amphoteric. Write an equation to illustrate your answer

Methods used in liquid phase synthesis of nanoparticles.

Disadvantages of liquid phase synthesis.

What types of nano materials can be synthesized from solvothermal process?

explain solvothermal process for configuration of nano discs.

Fe(OH), has a K of 7.9x10. What is the molar concentralion of Fe" and OH in a saturated solution of Fe(OH), What is the pH of this solution? What is the solubilily of Fo(OH), in g?

Chromatography enables the separation, identification, and purification of the components of a mixture for qualitative and quantitative analysis. There are, in fact, different types of chromatography such as column, thin-layer and paper chromatography. Construct a diagram or table to show the similarities and differences among these techniques. In addition, how would you compare them to gas chromatography?