Answer:
The answer is 4) KOH
Explanation:
Electrolytes are substances which ionize when dissolved in water. They are classified as:
Strong electrolyte: Which completely ionize when in water. Eg: NAOH, KOH (produces K+ and OH- ions when dissolved in water)
Weak electrolyte: partially ionize when in water. Eg: Acetic acid
Non-electrolyte: Do not ionize at all in water. Eg: Alcohols such CH3OH, sugars such as glucose (C6H12O6).
KOH is an electrolyte. Therefore, option (4) is correct.
Electricity flows via water-dissolved materials. Ions in a solution conduct electricity.The options:When dissolved in water, methanol (CH3OH) does not form ions.2. C6H12O6 (Glucose): It does not dissolve into ions in water, hence it is not an electrolyte.
Water doesn't dissolve into ions, hence it's not an electrolyte.4. Dissolved in water, potassium hydroxide (KOH) forms ions (K+ and OH-), making it an electrolyte. Therefore, KOH as an electrolyte is the correct option.
Learn more about electrolytes, here:
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A glass rod is used in chemistry and biology laboratories for transferring liquids, stirring solutions, and manipulating microscopic organisms.
A glass rod is commonly used in chemistry and biology laboratories for various purposes. In chemistry, it can be used to transfer small amounts of liquids from one container to another without contamination. It is also used for stirring solutions and facilitating chemical reactions. In biology, a glass rod can be used for extracting small samples or manipulating microscopic organisms in a controlled manner.
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b. Add a catalyst
c. Decrease the pressure
d. Use larger pieces of solid reactants
e. Decrease the concentration of the reactants
B) They may form either long, thin fibrous molecules or compact, rounded globular molecules.
C) They store genetic information for cellular metabolism.
D) They form through hydrolysis reactions.
E) a and b
Correct answer is Option E, which includes options A and B. Proteins can enhance specific chemical reactions as enzymes and can form diverse structures. Proteins do not store genetic information and do not form through hydrolysis reactions.
The correct answer to this question is Option E, which are options A and B. Proteins do indeed have the ability to enhance the rate of specific chemical reactions. These are known as enzymes. Another characteristic of proteins is their diverse structure, as mentioned in option B. They can form long, thin fibrous molecules like collagen or compact, rounded globular molecules like hemoglobin. However, they do not store genetic information (that is the function of DNA and RNA), nor do they form via hydrolysis reactions. Proteins are synthesized through a process called dehydration synthesis, not hydrolysis.
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b. The mass of the Carbon-14 sample is greater than the Carbon-12 sample, but the reactivity of both samples was the same .
c. The reactivity of the Carbon-14 sample is less than the Carbon-12 sample, but the mass of both samples was the same.
d. The reactivity of the Carbon-14 sample is greater than the Carbon-12 sample, but the mass of both samples was the same.
Answer:
B.
Explanation:
Correct: b. The mass of the Carbon-14 sample is greater than the Carbon-12 sample, but the reactivity of both samples was the same .
- C-14 has two additional neutrons, so is heavier than C-12. The chemical properties will be the same, however.
Answer:
To calculate the volume of the approximately 0.014 M copper (II) sulfate solution needed to prepare 100.00 milliliters of a 0.00028 M copper (II) sulfate solution, you can use the formula:
(Volume 1)(Concentration 1) = (Volume 2)(Concentration 2)
So, rearranging the formula, you can solve for Volume 1 (the volume of the 0.014 M solution):
Volume 1 = (Volume 2)(Concentration 2) / Concentration 1
Plugging in the values:
Volume 1 = (100.00 milliliters)(0.00028 M) / 0.014 M
Volume 1 ≈ 2.00 milliliters
Approximately 2.00 milliliters of the approximately 0.014 M copper (II) sulfate solution are needed to prepare 100.00 milliliters of a 0.00028 M copper (II) sulfate solution.