<span>Answer:
In an <u>Exothermic</u> process, the system releases heat that is absorbed by the <u>Surrounding</u>; in an endothermic process, the <u>System</u> absorbs heat from the <u>Surrounding</u>.
Explanation:
From thermodynamics point of view, a subject under observation is known as System, while everything except the system is known as Surrounding. The system is separated from surrounding by a Boundary.
As we know the heat moves from higher temperature to lower temperatures. So, the process in which the heat moves from system to surrounding as the system has higher temperature than surrounding is called as Exothermic Process. While, Endothermic Process is the reverse of Exothermic Process in which heat moves from surrounding to the system as surrounding has greater temperature than the system.</span>
Answer:
1 marcomolecules are:- A macromolecule is a very large molecule, such as a protein. They are composed of thousands of covalently bonded atoms. Many macromolecules are polymers of smaller molecules called monomers.
2 polymers are:- a natural or artificial chemical compound consisting of large molecules
Explanation:
hope it helps you
Answer:
Mass and charge is conserved
Explanation:
According to the law of conservation of mass, matter is neither created or destroyed. With the exception of nuclear reactions where mass is converted to energy thereby leading to an apparent loss in mass, this law applies to chemical reactions.
A redox reaction is a type of chemical reaction which involves a transfer of electrons. In a redox reaction, the mass of reactant particles is conserved. Also, as electrons are transferred between atoms, one donates and the other accepts. The charge of atoms depends on this gain or loss of electrons. A gain of electrons reduced the charge of an atom whereas a loss of electrons increases the charge. This two processes occur concurrently, therefore, charge is also conserved.
Answer:
a) 5
b) 4
c) 3
d) 3
e) 4
Explanation:
I use only one rule when the decimal is present, meaning you can see the decimal (as is the case with all of these).
When the decimal is Present, start counting sig figs from the Pacific (left) side of the number beginning with the first non-zero digit and count all the way to the end.
So, for example, in "a", the first non-zero digit starting from the left is 1, then continue counting all the way to the right side.
For "c", the first non-zero digit is the left most 4 (skip the first 4 zeros), then count all the way to the right side.
Answer:
E) 3.0x10⁻¹²
Explanation:
Ksp of Cu(OH)₂ is defined as:
Cu(OH)₂(s) ⇄ Cu²⁺(aq) + 2 OH⁻(aq)
Ksp = [Cu²⁺] [OH⁻]²
When pH is 10.1, [OH⁻] is:
pOH = 14 - pH
pOH = 3.9
pOH = -log [OH⁻]
<em>[OH⁻] = 1.26x10⁻⁴M</em>
<em />
Replacing in ksp formula:
4.8x10⁻²⁰= [Cu²⁺] [1.26x10⁻⁴]²
<em>3.0x10⁻¹² = [Cu²⁺] </em>
That means the maximum amount of Cu²⁺ that can be in solution is 3.0x10⁻¹²M, thus, molar solubility of Cu(OH)₂ is
<em>E) 3.0x10⁻¹²</em>
