Answer:
92.1
Explanation:
1.57 * 58.69
gas ➡ solid
liquid ➡ gas
solid ➡ gas
Answer:
ice
Explanation:
Answer:
C) Neutralizing
Explanation:
A neutralizing shampoo is specifically formulated to restore the pH balance of the hair by neutralizing any alkali or unwanted residues that may have accumulated. It is commonly used after chemical treatments such as perms or relaxers, which can alter the hair's pH level.
Chemical processes like perms and relaxers often involve the use of alkaline substances to break down and reshape the hair structure. After the process is complete, a neutralizing shampoo is used to stop the chemical reaction and bring the hair's pH back to its normal, balanced state. This helps to ensure the hair's health, smoothness, and manageability.
Answer: The correct answer for the blank is-
Investments and government expenses.
Gross domestic product (GDP) is the total goods and services value, which is produced within the boundary of a country during a particular year.
GDP is measured by expenditure method, which includes investment, government expenditure, net exports (Exports-Imports), and consumption.
Thus, investments and government expenses is the right answer for the blanks.
Answer:
A) investments, government expenses
Explanation:
I got it right on Odyssey!
Answer:
A carbon-14 atom has 6 protons, 8 neutrons and 6 electrons. The number 12 or 14 in the name of carbon-12 and carbon-14 refers to their atomic mass.
Explanation:
Those atoms that have the same "atomic number" but differente "atomic mass" (or atomic weight) are called isotopes.
Atomic number indicates the amount of electrons that an atom has, which matchs with the number of protons it has.
Atomic mass indicates the sum of protons and neutrons that an atom has.
Example with carbon-12:
carbon atomic number = 6 (find this information in a periodic table)
electrons= 6
protons= 6
carbon atomic mass = 12 (find this information in a periodic table)
neutrons= atomic mass - number of protons= 12-6 = 6 neutrons
Using the same analysis for carbon-14:
carbon atomic number = 6
electrons= 6
protons= 6
carbon atomic mass = 14
neutrons= atomic mass - number of protons = 14-6 = 8 neutrons
In this way, carbon-14 is an isotope of carbon-12 because carbon-14 has the same atomic number than carbono-12 but different atomic mass.
By using flame test we can identify the elements because colors which are given by elements with flame test are unique.
During the flame test, the electrons of the atom which are in ground state absorb energy and go to upper level. This is called electron excitation. Excited electrons are unstable. Hence, they come back to the ground state by emitting the energy as photons.If that released energy has a frequency which belongs to visual light, then that wave gives a color.
The colors observed during a flame test are caused by the presence of certain metal ions. When these metal ions are heated by a flame, the electrons in their outer energy level get excited and move to higher energy levels. As they return to their original energy levels, they release energy in the form of light, which we perceive as different colors.
During a flame test, the colors observed are caused by the presence of certain metal ions. When these metal ions are heated by a flame, the electrons in their outer energy level get excited and move to higher energy levels. As they return to their original energy levels, they release energy in the form of light, which we perceive as different colors.
For example, when a copper compound is heated, it emits a green color. This is because copper ions are responsible for this color. Different metal ions will emit different colors, allowing us to identify them by their characteristic flame color.
Therefore, the colors observed during a flame test are a result of the specific metal ions present in the substance being tested.
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