Answer:
Only powerful x-rays can be used
Explanatijust did it and read it
B.has buoyancy and volume
C.has mass and takes up space
D.conducts energy and has characteristic properties
Option A is correct.
A.The potential energy in the system is greatest at X.
A ball resting at the top of a hill will have greatest potential energy because when an object is at rest it tend to have greatest potential energy. When It moves from position X to Y the potential energy of the ball will decrease and its kinetic energy will increase.
Answer choices are listed below.
A.The potential energy in the system is greatest at X.
B.The kinetic energy in the system is greatest at X.
Answer:
Explanation:
The difference between the molecule and compound is that molecule is made up of atoms of same element while compound is made up of atoms from different elements.
Molecule:
When the atoms of same elements combine they form molecule. In molecule atoms are combined together by covalent bond.
For example,
H₂ is the molecule of hydrogen in which two hydrogen atoms combined together through covalent bond.
Compound:
When the atoms of different elements combine they form compound. In compound atoms are combined through ionic bond.
For example,
NaCl is compound it is formed by the combination of atoms of sodium and chlorine. The electron form sodium is gained by the chlorine and form ionic bond.
2) A chemical change creates a new species.
Chemical change:
The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.
These changes are irreversible
These changes occur due to chemical reactions
These may not be observed with naked eye
Example:
Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood
Boiling of egg: that change the chemical composition of protein in the egg .
The reaction of Hydrogen and oxygen:
H 2 (g) + O 2 (g) -------------------------------------> 2H2O
Answer:
The difference between a molecule and a compound is that a compound is made up of atoms from
✔ different elements
.
A chemical change creates a new
✔ substance
.Explanation:
(1) African Americans
(2) Asian Americans
(3) Mexican Americans
(4) Native American Indians
Hello. This question is incomplete. The full question is:
"…I have no motive, my friends, to deceive you. I am sincerely desirous to promote your welfare. Listen to me, therefore, while I tell you that you cannot remain where you now are. Circumstances that cannot be controlled, and which are beyond the reach of human laws, render it impossible that you can flourish in the midst of a civilized community. You have but one remedy within your reach. And that is, to remove to the West and join your countrymen, who are already established there. And the sooner you do this the sooner you will commence your career of improvement and prosperity….
— President Andrew Jackson, 1835
Which group of people was President Jackson
addressing? (1) African Americans (2) Asian Americans (3) Mexican Americans (4) Native American Indians"
Answer:
(4) Native American Indians
Explanation:
The text above shows a statement by President Andrew Jackson to the Native American population. Basically, the president is stating that the natives must leave their territory and move to the territory chosen by the government as appropriate for the natives. The president says that the natives must move because they will not be able to fit in and be part of the American population that was being established and because of the progress that was desired the lands of the indigenous territory would be necessary and required.
After being elected president in 1828, Andrew Jackson backed the expulsion of Native Americans from their homes, claiming that their survival depended on being kept apart from white people. Here Jackson is addressing Native American Indians. The correct option is 4.
The text above shows a statement by President Andrew Jackson to the Native American population. Basically, the president is stating that the natives must leave their territory and move to the territory chosen by the government as appropriate for the natives.
The president says that the natives must move because they will not be able to fit in and be part of the American population that was being established and because of the progress that was desired the lands of the indigenous territory would be necessary and required.
Thus the correct option is 4.
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The theoretical yield of carbon dioxide can be calculated using the stoichiometric ratio in the balanced equation for the reaction. It is the amount of product that would be obtained if all reactants were completely converted to product under ideal conditions. The theoretical yield can be calculated by multiplying the amount of the starting reactant by the stoichiometric ratio in the balanced equation.
Theoretical yield is the amount of product that would be obtained from a chemical reaction if the reaction proceeded perfectly and all reactants were completely converted to product. In this case, the balanced equation shows that 1 mole of H3C6H5O7 reacts with 3 moles of NaHCO3 to produce 3 moles of CO2. Therefore, the theoretical yield of carbon dioxide would be 3 times the amount of H3C6H5O7 given.
Example: If 2 moles of H3C6H5O7 are given, the theoretical yield of CO2 would be 3 x 2 = 6 moles.
Note that the theoretical yield assumes ideal conditions and perfect conversion, so the actual yield may be less due to factors like incomplete reactions or side reactions.
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Buffer capacity is defined as the capacity of a buffer to resist changes in pH upon addition of an acid or a base. The buffer capacity is high when the concentration of the acid and its conjugate base is high, and the pH of the solution is near the pKa value of the weak acid.
The greater the buffer capacity, the better it can resist pH changes upon addition of an acid or base. The buffer capacity of a solution is highest when the pH is near the pKa value of the weak acid.
A buffer is a solution that has the ability to resist changes in pH upon the addition of an acid or base. The buffer capacity is highest when the pH of the buffer is close to the pKa of the weak acid component in the buffer. Therefore, the buffer capacity is the highest when the pH is equal to the pKa value of the weak acid.
Therefore, the solution with the greatest buffer capacity is the one with the highest concentration of both the weak acid and its conjugate base, which can resist the changes in pH with the addition of an acid or base.
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