What is the difference between a cup of tea at 95°C, and a drop of tea at 95°C?
Answers
Answer:
See the explanation below
Explanation:
Both the cup of coffee and drop of coffee have the Same temperature of 95°C.
Although the difference is the cup of coffee has more heat contained in it than the drop of coffee. An explanation is when we heat a cup of coffee it will take more time to Attain in 95°C while the drop of coffee will take less time
Final answer:
The difference between a cup and a drop of tea at the same temperature is largely related to their different quantities, affecting the heat capacity and cooling rate. The cup has a higher heat capacity and cools down slower, while the drop cools down faster.
Explanation:
The difference between a cup of tea at 95°C and a drop of tea at 95°C is primarily a matter of quantity and its implications on heat capacity and cooling rate.
Both the cup and the drop of tea are at the same temperature, 95°C, however, the cup of tea contains a larger quantity or volume of tea. This means the cup of tea has a higher heat capacity.
What this signifies is that it would take more energy to change the temperature of the cup of tea than the drop of tea. Conversely, the drop of tea, having a lower heat capacity, will cool down faster than the cup. The larger volume and surface area of the cup of tea allows it to contain more heat and thus, lose heat slower than a drop.
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Which of the following is NOT a pure substance?a. milkb. oxygenc. waterd. carbon dioxide
Answers
The concentration of hydroxideions in the given aqueous solution is equal to 6.3 ×10⁻³ M.
What is the pOH?
pOH can be calculated from the negative logarithm of the concentration of hydroxideions in the given aqueous solution.
Mathematically, the formula of the pOH can be represented as shown below:
pOH = - log ([OH⁻ ])
and pH + pOH = 14 ..............(1)
Where [OH⁻] is representing the concentration of hydroxide ions in an aqueous solution.
Given, the value of the pH of the ammonia solution, pH = 11.8
Substitute the value of the pH in equation (1):
pH + pOH = 14
11.8 - log [OH⁻] = 14
- log [OH⁻] = 14 -11.8
log [OH⁻] = - 2.2
[OH⁻] = 6.3 × 10⁻³ M
Therefore, the concentration of the hydroxideions is equal to 6.3 ×10⁻³ M.
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pH + pOH = 14
Solve for pOH and you get:
pOH = 14 - pH
Replace the pH with it's value:
pOH = 14 - 11.8
pOH = 2.2
Now that you have the pOH you can find the concentration of OH- ions with this formula:
pOH = -log[OH-]
Solve the formula for [OH-] and you get:
[OH-] = 10^(-pOH)
Now replace pOH with it's value:
[OH-] = 10^(-2.2)
[OH-] = 0.006309 M
The concentration of OH- atoms is 0.006309M or in the scientific notation 6.309×10^(-3)M
It will expand, because the neon atoms will get larger.
It will expand, because the neon atoms will move more quickly and get farther apart.
It will shrink, because the neon atoms will lose energy as heat, and move closer together.
Answers
So, the answer to the second question is C. It will expand because the neon atoms will move more quickly and get farther apart.
Answer: It will expand, because the neon atoms will move more quickly and get farther apart.
Explanation: This can be explained based on Charle's law.
Charles' Law: This law states that volume is directly proportional to the temperature of the gas at constant pressure and number of moles.
(At constant pressure and number of moles)
Thus if a gas absorbs heat at constant pressure and no of moles, the temperature of the gas increases and thus the volume also increases and thus it expands by gaining kinetic energy and moving far apart.
b) 200.00 kg - 199.0 kg =
c) 25 L - 3.0 L =
d) 0.67 cm + 2.0 cm + 0.090 cm =
e) 104.5 g + 0.40 g =
Answers
The answer will be 0.75 gram, 1 kilo-gram, 22 L, 2.76 cm, and 104.9 gram.
What is gram?
A metric unit with mass and weight equal to approximately 15.432 grains, or one-thousandth of a kilo-gram, is called a gram.
Calculation of given question.
a) 7 gram - 3.5 gram - 2.75 gram = 0.75 gram
b) 200.00 kg - 199.0 kg = 1 kilo-gram
c) 25 L - 3.0 L = 22 L
d) 0.67 cm + 2.0 cm + 0.090 cm = 2.76 cm
e) 104.5 g + 0.40 g = 104.9 gram
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a) 1 g
b) 1.0 kg
c) 22 L
d) 3.6 cm
e) 104.9 g
Answers
Trail B will have a lower activation energy than trail A because in this trial the scientist added a catalyst.
What is a catalyst?
A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process.
A catalyst is a substance that speeds up a chemical reaction or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction.
Catalysts slow down reaction rates which will in turn mean a loweractivation.
Hence, trail B will have a lower activation energy than trail A because in this trial the scientist added a catalyst.
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Answer:
It will have a lower activation energy than Trial A.
Explanation:
Trail B will have a lower activation energy than trail A because in this trial the scientist adds a catalyst. Catalysts slow down reaction rates which will in turn mean a lower activation.
Answers
Germanium and silicon are semiconductors because they are metalloids.
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