What are the two kinds of electricity?

Does the reaction of a main-group metal oxide in water produce an acidic solution or a basic solution? Write a balanced equation

Fynjy0 [20]

Answer: The main group metal produce a basic solution in water and the reaction is $MO+H_2O\rightarrow M(OH)_2$

Explanation:

Main group elements are the elements that are present in s-block and p-block.

The metals that are the main group elements are located in Group IA, Group II A and Group III A.

Oxides are formed when a metal or a non-metal reacts with oxygen molecule. There are two types of oxides which are formed: Acidic oxides and basic oxides.

Acidic oxides are formed by the non-metals.
Basic oxides are formed by the metals.

When a metal oxide is reacted with water, it leads to the formation of a base.

The general formula of the oxide formed by Group II-A metals is 'MO'

The chemical equation for the reaction of metal oxide of Group II-A and water follows:

$MO+H_2O\rightarrow M(OH)_2$

Hence, the main group metal produce a basic solution in water and the reaction is $MO+H_2O\rightarrow M(OH)_2$

4 0

3 years ago

The heat of vaporization ΔHv of dichloromethane CH2Cl2 is 28.0 /kJmol . Calculate the change in entropy ΔS when 3.3g of dichloro

ella [17]

Answer:

$\Delta _VS=3.48x10^{-3}kJ=3.48J$

Explanation:

Hello,

In this case, the change in the entropy, by knowing the change in the enthalpy and the temperature for a vaporization process is given by:

$\Delta _VS=\frac{\Delta _VH}{T_V}$

Thus, we start by computing the change in the enthalpy for the 3.3g of dichloromethane as shown below:

$\Delta _VH=3.3gCH_2Cl_2 *\frac{1molCH_2Cl_2}{84.9gCH_2Cl_2}*28\frac{kJ}{molCH_2Cl_2} =1.09kJ$

Finally, the change in the entropy, considering the temperature in kelvins:

$\Delta _VS=\frac{1.09kJ}{(39.8+273.15)K}\\\\\Delta _VS=3.48x10^{-3}kJ=3.48J$

Best regards.

5 0

3 years ago

Based upon the valence numbers of the elements magnesium (2) and hydrogen (1), predict how many covalent bonds would form betwee

9966 [12]

Magnesium is in the second group in the periodic table, which means that its outer shell is an s-orbital which contains 2 valence electrons.

Hydrogen also has an s-orbital as an outer shell but it only contains 1 valence electron. The electron dot diagram would look like this:

H· ·Mg· ·H

Each hydrogen shares one electron with magnesium and the magnesium shares one of its electrons with each hydrogen resulting in two covalent bonds.

H:Mg:H and this gives us the compounds MgH₂

6 0

4 years ago

What is the relationship between the amount of space and the state of matter

zhenek [66]

The relationship between the amount of space between particles and the state of matter is that if the distance between the particles is very very less or closely packed) then it said to be a solid , If the distance between the particles is very less (more than that of solid) then the matter is a liquid & If the distance between the particles is less (more than that of liquid) then it is said to be gaseous. By this we conclude that when the amount of space between the particles varies then the states of matter (Solid , Liquid , Gas) also differs.

6 0

3 years ago

What is the mass number of a carbon atom which has 7 neutrons?

Strike441 [17]

Answer:

Carbon-13

Explanation:

Carbon have three isotopes. Isotopes are the atoms of the same element which has a different number of neutrons. Carbon has 3 isotopes.

Carbon-12 : 6 electrons I 6 protons I 6 neutrons

Carbon-13 : 6 electrons I 6 protons I 7 neutrons

Carbon-14 : 6 electrons I 6 protons I 8 neutrons

5 0

3 years ago