Priblemas de quimica

Nomenclatura:
Correcta Verde

1. What is the hybridization for PCl5?
* sp
* sp2
* sp3
* sp3d
* sp3d2
2.
What kind of interaction exists between Xe –Xe?
* dipole - dipole
* ion – permanent dipole
* ion – induced dipole
* permanent dipole – induced dipole
* induced dipole – induced dipole
3.
What is the pH ofa 1*10-6 M KCl solution?
* 8.04
* 7.00
* 5.96
* 6.00
* 8.00
4.
A molecule of CH4 is
* polar
* non polar
* ionic
* organic
*metallic
5.
Copper has a specific heat of 0.382 J/g·ºC. If 4.51 g of copper absorbs 2.75 J of heat, what is the change in temperature?
* 2.87 ºC
* -2.87ºC
* 2.05 ºC
*1.60 º C
* -2.05 ºC
6.
Methane, CH4, reacts with oxygen to produce carbon dioxide, water, and heat. CH4(g) + 2O2(g) -->CO2(g) + 2H2O(l) dH = -890.3 kJ. What is the value of /\H if7.40 g of CH4 are combusted?
* -277 kJ
* -890 kJ
* +277 kJ
* -411 kJ
* -456 kJ
7.
The following is an example of:

* Structural Isomer
*Conformational Isomer
* Enantiomer
* Geometric Isomer
* Functional Isomer
8.
The following is an example of:

* Molecular Isomer
* Enantiomer
* Geometric Isomer* Structural Isomer
* Functional Isomer
9.
Which of the following pairs is INCORRECT?
* chlorous acid / HClO3
* dinitrogen tetroxide / N2O4
* ammonium nitrate/ NH4NO3
* copper (II) periodate / Cu(IO4)2
* potassium permanganate / KMnO4
10.
Which element has the smallest atomic radius?
* Li
* Na
* Rb
* F* I
11.
How many grams of Ca(OH)2 are contained in 1800 mL of 0.0250 M Ca(OH)2 solution?
* 2.78 g
* 3.98 g
* 3.34 g
* 4.78 g
* 7.73 g
12.
What is the...