Which substance can not be decomposed by a chemical change?A. Ammonia
B. Copper
C. Propanol
D. Water
(P.s, tysm )
Answers
The substance that cannot be decomposed by a chemical change is: B. Copper
What is copper
Copper is an element, and elements cannot be broken down into simpler substances through chemical changes. Chemical changes involve the rearrangement of atoms in molecules, leading to the formation of new substances.
However, in the case of an element like copper, it is composed of only one type of atom (Cu), and it cannot be further broken down into simpler substances by a chemical reaction.
Read mroe on copper here brainly.com/question/26449005
#SPJ2
Related Questions
A beaker containing a mixture of N2(g) and H2(g) is cooled by placing it in a tray of cold water. In response to the cooling, the likely number of collisions between the molecules of N2(g) and H2(g) will . The rate of the reaction will .
Which of the following adaptations would you expect tofind in an animal in the alpine biome, but not in the taiga
if 1200 j of heat were absorbed by a 25 g block of iron, by how much would the temperature of the iron increase?
Which is the correctly balanced chemical equation for the reaction of KOH and H2SO4?
Answers
Answers
Answers
There are approximately 4.52 x 10^23 atoms in 0.750 moles of zinc.
How to find the number of atoms
To determine the number of atoms in a given amount of a substance, you can use Avogadro's number, which is approximately 6.022 x 10^23 atoms/mol.
Given that you have 0.750 moles of zinc, you can calculate the number of atoms using the following steps:
Multiply the given number of moles by Avogadro's number:
0.750 moles * (6.022 x 10^23 atoms/mol) = 4.5165 x 10^23 atoms
Round the result to an appropriate number of significant figures:
Since the value given has three significant figures, the final answer should be rounded accordingly. Therefore, the number of atoms in 0.750 moles of zinc is approximately 4.52 x 10^23 atoms.
So, there are approximately 4.52 x 10^23 atoms in 0.750 moles of zinc.
Learn more about zinc at
#SPJ6
It is
It can be reshaped by a force.
It ignites at high temperatures.
It can combine with oxygen.
Answers
Answer is: It can be reshaped by a force.
Physical property can be observed and measured without any changes in molecular composition. The same substance is present before and after the change, changing the shape is physical change.
Copper reaction with acid, ignition and combination with oxygen are chemical change (chemical reaction), because new substances are formed, the atoms are rearranged and the reaction is followed by an energy change.
That is because physical properties are ones that don't change the substance when it is physically altered. If copper is physically changed, none of its other chemical properties are influenced.
Answers
the correct answer its:
random internal motion of atoms and molecules
hope it helps
Final answer:
The primary cause of diffusion is the random internal motion of atoms and molecules resulting from their thermal energy, leading substances to move from areas of high concentration to areas of lower concentration until evenly distributed. Factors like temperature and the mass of diffusing molecules affect the speed of diffusion. The process continues until it reaches a dynamic equilibrium, where there is no concentration gradient and no net movement of substances.
Explanation:
The primary cause of diffusion is the random internal motion of atoms and molecules due to their thermal energy, a concept derived from Physics. This motion allows substances to move in a way that they can evenly distribute themselves throughout a given space. As a result, diffusion is characterized by movement from high to lower concentration areas, a process that goes on until the substance is evenly distributed in a system.
Several factors can affect diffusion, such as temperature and the mass of the diffusing substance. Higher temperatures enhance the energy and therefore the movement of the molecules, leading to an increased diffusion rate. In contrast, lower temperatures decrease the energy and movement of molecules, thus reducing the diffusion rate. The mass of the molecules diffusing also plays a role - heavier molecules move slower, and therefore diffuse more slowly, whereas the reverse is true for lighter molecules.
A concentration gradient is the factor that primarily fuels the diffusion process. Greater the difference in concentration, the more rapid the diffusion. In case of solutions containing more than one substance, each type of molecule diffuses according to its unique concentration gradient, independently of other substances.
Eventually, the system reaches a stage known asdynamic equilibrium. At this stage, there's no net movement of the substance, yet the molecules continue to move around in the space. The concentration gradient no longer exists, which means that diffusion has ceased.
Learn more about Diffusion here:
#SPJ6