The concentration is 5 g/L.
Concentration = mass/volume = 10 g/2 L = 5 g/L
Answer:
B absorption
Explanation:
because absorption is the transfer of energy carried by light waves to particles of matter
Answer:
Explanation:
Dalton’s Atomic Theory
The main points of Dalton’s atomic theory are:
=Everything is composed of atoms, which are the indivisible building blocks of matter and cannot be destroyed.
=All atoms of an element are identical.
=The atoms of different elements vary in size and mass.
=Compounds are produced through different whole-number combinations of atoms.
=A chemical reaction results in the rearrangement of atoms in the reactant and product compounds.
Atomic theory has been revised over the years to incorporate the existence of atomic isotopes and the interconversion of mass and energy. In addition, the discovery of subatomic particles has shown that atoms can be divided into smaller parts. However, Dalton’s importance in the development of modern atomic theory has been recognized by the designation of the atomic mass unit as a Dalton.
Answer:K2X
Explanation: Valency can be defined as the combining power of an element. It is the valency that dictates the value an element will have when writing a chemical formula for its compound.
MgX is a compound of magnesium and an element X. The valency of magnesium in most of its compound is +2. Now for the 2 to have been absent in the chemical formula, this shows that the element X itself have a valency if -2 for the valencies of both to have canceled out.
Now considering the element potassium, it is an alkaline metal belonging to group 1 of the periodic table. Hence, it is expected that it has a valency of +1
Forming a compound with element X means there would be an exchange of valencies between the two. We have established that x has a valency of -2. The formula of the compound thus formed by exchanging the valencies of both element would be K2X