The group of elements which have the lowest ionization energy are the alkali metals
Answer:
Difference between Homogeneous mixture and Heterogeneous Mixture are as follows:
- A mixture or sample that is consist of uniform composition and properties is called a homogeneous mixture while a mixture or sample that is consist of different composition and properties is called a heterogeneous mixture.
- Homogenous mixture has only single phase while heterogeneous mixture has two or more phases.
- Homogenous mixture can not be separated by physical methods while heterogeneous mixture can be separated out physically.
- Example of homogenous mixture is Water and sugar and heterogeneous mixture is oil and water.
<span>The following is the order from lowest boiling point to highest based on the types of forces these compounds have:
CO2
CH3Br
CH3OH
RbF
CO2 is a nonpolar molecular compound. The only intermolecular force present is a relatively weak dispersion force, because of the small molar mass. CO2 will have the lowest boiling point. ď‚· CH3Br is a polar molecule. Dispersion forces (present in all matter) and dipoleâ’dipole forces will be present. This compound has the next highest boiling point. ď‚· CH3OH is a polar molecule, which can form hydrogen bonds; these are especially strong dipole-dipole attractions. Dispersion forces and hydrogen bonding are present to give this substance the next highest boiling point. ď‚· RbF is an ionic compound. Ionâ’ion attractions are much stronger than any intermolecular force. RbF has the highest boiling point</span>
The number of Pbr3 that contain 3.68 x10^ 25 bromine atoms is 60.631 moles
calculation
by use of Avogadro law constant
that is, 1 moles = 6.02 x10^23 atoms
what about 3.65 x10^25 atoms
by cross multiplication
= (1 mole x 3.65 x 10 ^25 atoms) / ( 6.02 x10^23 atoms) = 60.631 moles
atoms and atoms cancel out each other
Answer:
Mg(OH)₂(s) + 2HCl(aq) ----> MgCl₂(aq) + 2H₂O(l)
Explanation:
Magnesium hydroxide is a white solid that is sparingly soluble in water. It is a basic hydroxide, therefore it neutralizes acids to form salt and water.
Magnesium hydroxide commonly used as an antacid, for example milk of magnesia, because it reduces stomach acid, and increases water in the intestines which may induce bowel movements. It also relieves indigestion, sour stomach, and heartburn. Magnesium hydroxide is also used as a laxative to relieve occasional constipation.
The equation for the reaction between magnesium hydroxide and stomach acid, HCl, is as follows:
Mg(OH)₂(s) + 2HCl(aq) ----> MgCl₂(aq) + 2H₂O(l)