Which of the following is not a property of a base1. Has a bitter taste
2. Feels slippery to the touch
3. Reacts with active metals to produce hydrogen gas
4. Increases the concentration of hydroxide ions in an aqueous solution
Answers
Base has formula .
Example of a base is a soap,
and it has a bitter taste, feels slippery to the touch.
From the formula we can see that a base has hydroxide ion (OH), so a base increases the concentration of hydroxide ions in an aqueous solution.
3. Reacts with active metals to produce hydrogen gas is not a property of the base; this is a property of acids.
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Answers
You didn’t show the cylinder containing water, so I created one that you can use as a model (see image).
The water level was originally at 37 mL.
Then you added the ball, and it displaced its volume of water.
The new volume reading is 52 mL, so
Volume of ball = volume of displaced water = 52 mL – 37 mL = 15 mL.
Lowering a 21g ball with a volume of 15 cm³ into water in a cylinder raises the water level due to the displaced water volume, illustrating Archimedes' principle.
When a ball is lowered into a cylinder of water, it displaces water equal to its own volume, based on Archimedes' principle. The principle states that the buoyant force acting on an object in a fluid is equal to the weight of the fluid displaced by the object.
In this scenario, a ball with a mass of 21g and a volume of 15 cm³ is immersed in the water-filled cylinder. Initially, the water level in the cylinder is at a certain height. As the ball is lowered into the water, it displaces an amount of water equal to its own volume, causing the water level in the cylinder to rise.
The sketch on the right would depict the ball submerged in the water, and the new water level higher than the initial level. The increased water level is a result of the volume of water displaced by the submerged ball.
This phenomenon is essential in understanding buoyancy and the principle behind why objects float or sink in fluids. The upward force exerted by the water (buoyant force) counteracts the weight of the submerged object, leading to changes in water levels.
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Answers
Answer: Matter is not destroyed, only changes forms.
Explanation: Take my answer with a grain of salt, I'm not a genius in this type of stuff but, the law of matter states that matter is not destroyed, only changes forms. This can be applied to photosynthesis because the plants take water and use it to make glucose to eat.
Again, I'm not genius so take my answer with a grain of salt but, hope it at least helps a little.
1. Photosynthesis in Plants:
- Plants undergo photosynthesis, a process in which they convert light energy from the sun into chemical energy stored in the form of glucose (a sugar) and other organic molecules.
- The law of conservation of energy applies here because the energy in sunlight is transformed into chemical energy within the plant. This chemical energy can be stored and later used for various plant functions.
- Photosynthesis also involves the conversion of carbon dioxide and water into glucose and oxygen, but the total energy within the system remains constant, following the law of conservation of energy.
2. Water in the Hydrologic Cycle:
- The hydrologic cycle involves the movement of water between various reservoirs on Earth, including oceans, land, and the atmosphere.
- Water evaporates from the surface (e.g., from oceans, lakes, and rivers) into the atmosphere due to the input of energy, primarily from the sun. This energy causes water molecules to change from a liquid to a gaseous state.
- When the water vapor condenses in the atmosphere, it releases heat energy (latent heat), warming the surrounding air. This energy is then transferred to the surrounding environment.
- Eventually, the condensed water falls back to the surface as precipitation, releasing the stored energy in the form of heat.
In both of these natural processes, the law of conservation of energy is upheld. Energy is transformed and transferred, but the total energy within the system remains constant.
Answers
Answers
b. both hydrogen atoms
c. the oxygen atom
d. There is no difference in the electronegativities of the atoms in a water molecule.
Answers
The oxygen atom in a water molecule has the greatest electronegativity. Therefore, the correct option is option C.
What is electronegativity?
The tendency of an atom of a particular chemical element could attract shared electrons while forming a chemical bond is represented by the symbol. The electronegativity of an atom is determined both by its atomic number as well as the distance between its valence electrons and the charged nucleus.
The higher the related electronegativity, the more electrons an atom or substituent group attracts. Electronegativity is a simple approach to quantify bond energy as well as the sign and degree of a bond's molecular polarity, that describes a bond all along continuum between covalent through ionic bonding. The oxygen atom in a water molecule has the greatest electronegativity.
Therefore, the correct option is option C.
To learn more about electronegativity, here:
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Answer:
The Oxygen Atom
Explanation: