Answer:
The answer to your question is carbon. The masses of all isotopes are based on a comparison to the mass of a particular isotope of carbon123. This isotope is carbon-12, which has six protons and six neutrons in its nucleus. By definition, one atom of carbon-12 is assigned a mass of exactly 12 atomic mass units (amu), which is a unit of mass equal to one twelfth of an atom of carbon-1212. All other isotopes have their masses expressed as a fraction or a multiple of this standard unit. For example, the isotope hydrogen-1 has a mass of 1.0078 amu, which means it is slightly heavier than one twelfth of carbon-12. The isotope uranium-238 has a mass of 238.0508 amu, which means it is almost 20 times heavier than carbon-12. The reason why carbon-12 was chosen as the reference standard is because it is abundant, stable, and easy to measure3. I hope this answer helps you understand the concept of isotopes and atomic mass better.
Answer:
Chemists use a solution called Universal Indicator to identify acids and bases. ... The Universal Indicator Color Guide shows that Universal Indicator turns red when it is added to a strong acid, it turns purple when it is added to a strong base, and it turns a yellowish-green when it is added to a neutral solution.
Explanation:
Answer:
Phenolphthalein
Explanation:
Explanation:
The principle used in the preparation of these salts is to dissolve
the cystine in an alcoholic alkali solution to which just sufficient
water to effect solution has been added, and, after filtering from
excess cystine, to precipitate the salt by addition of a suitable
indifferent solvent. While various solvents, such as acetone,
ether, or large amounts of alcohol caused precipitations, these were
either oily or amorphous. Only acetonitrile was found to possess
the power of initiating regular crystallization in the salt solutions.
While the solutions of the different salts require different amounts
of the solvent for complete precipitation, a partial substitution of
absolute ether for acetonitrile was found expedient in the case
of the most soluble of the salts, the K salt.
Answer:
It is simply a process of forming crystal.
Explanation: When salt is heated and dissolve in the liquid mainly water then its called saturated solution. When we further add salt and increase heat in order to dissolve it then it forcibly dissolve in liquid it's called supersaturated solution. After we slowly cool down the temperature then the salt we have put in supersaturated solution arises in the form of crystal. Hence its called crystalization.
B. There are two carbon atoms and a double carbon bond.
C. There are three carbon atoms and a double carbon bond that starts on the second carbon atom.
D. There are four carbon atoms and a double carbon bond that starts on the second carbon atom.
Gradpoint answer: a four-carbon hydrocarbon with a double bond between the second and third carbon atoms
transporting the glucose made during photosynthesis to the roots and
stems.
Phloem
Xylem } Vascular
stem
τρος
Xylem
Phloem
Which function is xylem specifically adapted to perform in plants?
(7.12A)
A
It helps prevent wer loss
B
It transports water from the roots to the leaves
с
It exchanges gases with the atmosphere
D
It captures sunlight for photosynthesis
Answer:
B
Explanation:
it transports water from roots to the leafs
NaCl, CH4, MgO and C6H12O6 are the empirical formula for four ionic compounds.
Empirical formula is defined as the chemical formula of a compound that gives the simplest proportions or ratios of the elements present in the compound but not the original numbers of atoms.
So we can conclude that NaCl, CH4, MgO and C6H12O6 are the empirical formula for four ionic compounds.
Learn more about ionic here: brainly.com/question/2687188
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The empirical formula for the four ionic compounds are CaF₂ and V₂S₅.
The empirical formula represents the simplest ratio of the elements in a compound. To determine the empirical formula of an ionic compound, we need to find the ratio of the ions involved. Given Ca²⁺, V⁵⁺, F⁻, and S²⁻, we can combine these ions to form different compounds by balancing their charges. Taking Ca²⁺ and F⁻, we get CaF₂. For V⁵⁺ and S²⁻, we get V₂S₅. Therefore, the empirical formula for the four ionic compounds is CaF₂, V₂S₅.
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