The value of Ka in water at 25 °C for propionic acid (C2H5CO2H) is 3.4 x 10-5 M. What is the pH of a 0.020 M aqueous solution of propionic acid?
Answers
The pH of a 0.020 M aqueous solution of propionic acid is 1.70.
What is aqueous solution?
Aqueous solution is defined as a chemical mixture in which water serves as the solvent. Aqueous solutions are made up of water and one or more dissolved materials. Solids, gases, or other liquids can all dissolve in an aqueous solution. A mixture needs to be stable in order to be considered a true solution.
pH is defined as a scale that is used to describe an aqueous solution's acidity or basicity. A high pH in the body can happen for a number of reasons, such as faulty kidney/liver function, digestive issues, drug side effects, and lung issues. When the body's levels of carbon dioxide, an acid, are too low, respiratory alkalosis occurs.
pH = -log[H+]
pH = -log [ aqueous solution ]
pH = - log [ 0.020 ]
pH = 1.70
Thus, the pH of a 0.020 M aqueous solution of propionic acid is 1.70.
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A mixture of CH4 and H2O is passed over a nickel catalyst at 1000 K. The emerging gas is collected in a 5.00-L flask and is found to contain 8.62 g of CO, 2.60 g of H2, 43.0 g of CH4, and 48.4 g of H2O.
Answers
Answer : The elements include in group 5A are, Nitrogen, phosphorous, arsenic, antimony and bismuth.
Explanation :
According to the modern periodic table, the group 5A is known as group 15. And it is also known as nitrogen family.
The elements present in group 5A are, nitrogen (N), phosphorous (P), arsenic(As), antimony(Sb) and bismuth (Bi).
The general electronic configuration of group 5A elements is,
The number of valance electrons present in group 5A elements are, 5
Hence, the elements include in group 5A are, Nitrogen, phosphorous, arsenic, antimony and bismuth.
Final answer:
Group 5A, also called Group 15 in the modern IUPAC system, contains the elements Nitrogen, Phosphorus, Arsenic, Antimony, Bismuth, and the synthetic element Moscovium. Each of these elements has a p3 configuration in their valence shell.
Explanation:
The elements present in Group 5A (Group 15 in IUPAC system) are known as the pnictogens. This group includes Nitrogen (N), Phosphorus (P), Arsenic (As), Antimony (Sb), Bismuth (Bi) and the unconfirmed synthetic element Moscovium (Mc). These elements, each with a p3 configuration in their valence shell, form compounds with a wide range of properties and uses.
Nitrogen is a common gas in the Earth's atmosphere, deeply involved in biological processes. Phosphorus is key in DNA and energy processes in living beings. Arsenic, Antimony, and Bismuth are metalloids used in various industrial applications. Moscovium is a synthetic element not found naturally and its properties are being studied.
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1)Cu
2)PO4-3
3)SO2
Answers
Answer:
Explanation: the answer is B. PO4-3
Electrons are the subatomic particles with the smallest mass.
Neutrons orbit the nucleus of the atom.
Subatomic particles all have the same mass.
Answers
Both protons and electrons have charge (protons are positive and electrons are negative)
Protons and neutrons both equal 1 amu (atomic mass unit), whereas electrons weigh about 1/1000 amu
Electrons orbit around the nucleus, whereas protons and neutrons are inside of the nucleus
And for the last option, I already answered it
Answer:
The second option - electrons are the subatomic particles with the smallest mass.
Explanation:
Answers
Answer:
IM TO LATE SORRY
Explanation:
B) oxygen, glucose
C) carbon dioxide, oxygen
D) oxygen, carbon dioxide
Answers
Answer:
The answer is C) carbon dioxide, oxygen.
Explanation:
Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
So lets eliminate some answers:
- Photosynthesis removes oxygen from the atmosphere and produces and releases glucose into the atmosphere.
Oxygen can not convert itself to glucose and plants don't take in oxygen so this answer is automatically eliminated
- Photosynthesis removes oxygen from the atmosphere and produces and releases carbon dioxide into the atmosphere.
Plants take in carbon dioxide and convert it to oxygen basically how humans breath but inverted, not the other way around.
- Photosynthesis removes glucose from the atmosphere and produces and releases oxygen into the atmosphere.
Glucose naturally is not found in the atmosphere in the first place so if a plant were to survive is would have to be in a glucose enriched environment which is very uncommon meaning it would be very rare to be a living functional plant that can photosynthesize. So this is checked off the list!
So we are now left with one sentence that would make sense
- Photosynthesis removes carbon dioxide from the atmosphere and produces and releases oxygen into the atmosphere.
Plants take in carbon dioxide meaning the first section of this answer is right and they release oxygen which is also correct therefore this statement is valid and is the correct answer
Hope this helped (:
Sources I used:
- Oxford dictionary
Answers
Answer:
Fe+2HOH=Fe(OH)_2+H_2. Iron is divalent to hydrogen and water.
Explanation: