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INDIVIDUAL WORK-8
For students all specialities
MODUL 2
In the maximal possible exited state the total spin of an atom makes 3. Find the number of the group, in which located this atom: | |
a | 2 |
b | |
c | |
d | |
f |
In a highest oxide of an element a ratio between atoms of oxygen and the element makes 1:1. How many valent р -orbitals are filled with electrons in the atom of this element: | |||
a | |||
b | |||
c | |||
d | |||
| |||
Among the given series of atoms and ions of elements have an identical electronic configuration: | |||
a | Na – Si – К+ | ||
b | О2– – Тi – Al3+ | ||
c | Zn2+ – Р – Cu+ | ||
d | Сl– – Sc3+ – Аr | ||
| |||
How many nonpaired electrons are in atom of magnesium in its normal and exited state: | |||
a | 1 and 1 | ||
b | 1 and 2 | ||
c | 0 and 1 | ||
d | 0 and 0 | ||
f | 0 and 2 | ||
On a basis of what laws has been made a sequence of elements: carbon, nitrogen, oxygen, fluorine: | |
a | The elements are located in ascending order of atomic mass |
b | Elements of one group |
c | All belong to metals |
d | All belong to nonmetals |
f | Elements of one period |
Among the given ions a similar to ion Na+ electronic shell is: | |
a | Ca2+ |
b | Mg2+ |
c | H+ |
d | K+ |
f | Li+ |
The s- і p-bonds differ with: | |
a | Location of area of higher electronic density |
b | Energy of bond |
c | Displacement of an electronic pair to one of atoms |
d | Polarity of bond |
f | By number of electrons, which form bond |
Find the charge of a complex ion, charge and coordination number of the central atom in chloropentammineplatinum (IV) carbonate, and also sum of coefficients in the reaction of this salt solution with hydrochloric acid: | |
a | 3+, 4+, 6, 15 |
b | 3+, 4+, 6, 12 |
c | 4+, 2+, 6, 15 |
d | 2+, 6+, 6, 15 |
f | 2+, 4+, 4, 10 |
Find molar mass of an equivalent of the central atom and molar mass of an equivalent for К2[Pt(NО2)2Cl2]: | |
a | 97,5 g/mol; 109 g/mol |
b | 48,75 g/mol; 218 g/mol |
c | 48,75 g/mol; 109 g/mol |
d | 97,5 g/mol; 218 g/mol |
f | 97,5 g/mol; 436 g/mol |
Value for the reaction 2C2H6(g)+ 7O2 = 4CO2(g)+ 6Н2O(g), if react= –2855,68 kJ/mol; react= 92,77 J/mol×К, is equal to: | |
a | –1883,32 kJ/mol |
b | –2283,32 kJ/mol |
c | –2483,32 kJ/mol |
d | 2683,32 kJ/mol |
f | –2883,32 kJ/mol |
Two reactions run at temperature 20°C with identical rate. How will be changed the rates of this reaction correspond at 70°C, if temperature coefficient of rate of one of them is 2,0, and of the second — 3,0 | |
a | 1: 9,4 |
b | 1: 3,3 |
c | 1: 6,2 |
d | 1: 7,6 |
f | 1: 5,1 |
Find the equilibrium constant for reaction РСl5(g)= РСІ3(g)+ Cl2(g), if at some temperature from 2 moles of phosphorus pentachloride, that was placed in a 10 litre vessel, is dicomposed 1,5 moles: | |
a | 0,1 |
b | 0,25 |
c | 1,0 |
d | 0,75 |
f | 0,45 |
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