The calorimeter constant is 816.800 J/degree.
Explanation:
Data given:
volume of cold water = 50 ml
initial temperature of the cold water t1 = 19.1 degrees
volume of hot water = 50 ml
temperature of hot water t2 = 54.9 degrees
change in temperature t3= 31.3 degrees
calorimeter constant = ?
energy gained by cold water = energy lost by hot water
q hot water = 50 x 4.184 x (54.9-31.3)
q hot water = 50 x 4.184 x 23.6
= 4937.9 cal/degree
q cold water = 50 x 4.184 x (31.3-19.1)
q cold water = 2552.24 cal/deg
FINAL ENERGY = qhot water - q cold water
final energy = 4937.9 - 2552.24
final energy = 2385.66 cal/deg
calorimeter constant = [tex]\frac{final energy}{t3-t1}[/tex]
putting the values:
calorimeter constant = [tex]\frac{2385.66}{12.2}[/tex]
CALORIMETER CONSTANT = 195.22 J/deg
to convert in joules/degree multiply the value with 4.184
= 195.22 x 4.184
= 816.800 J/deg
2 Points
Which role do fish ladders serve?
O
A. They allow fish farmers to raise certain kinds of fish.
O
B. They help some kinds of fish migrate past dam barriers.
O
C. They improve the nutritional value of some kinds of fish.
O
D. They help certain kinds of fish stay physically fit.
Answer:
B. They help some kinds of fish migrate past dam barriers.
Explanation:
Description
A fish ladder, also known as a fishway, fish pass or fish steps, is a structure on or around artificial and natural barriers (such as dams and waterfalls) so as to enhance diadromous fishes' natural migration as well as movements of potamodromous species.
How many moles are in 1.0 x 109 atoms of Zn?
Answer:
1.66×10^-15
Explanation:
the explanation is in the picture
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To be considered _____ they must have lived over a very short period of time and had to be many of them.
A) An index fossil
B) A trace fossil
C) A petrified fossil
D) A carbon fossil
Answer:
A) Index Fossils
Explanation:
Index fossils are fossils used to define and identify geologic periods. Index fossils must have a short vertical range, wide geographic distribution and rapid evolutionary trends.
_______is a form of asexual reproduction that occurs when an offspring grows from a piece of its parent
Answer:
vegetative reproduction
Explanation:
Answer:
Animal Regeneration
Does the coronavirus have DNA or RNA?
Answer:
The coronavirus has RNA?
Explanation:
Coronaviruses are important human and animal pathogens and contain an extraordinarily long (27-31 kb) RNA genome. Its RNA synthesis involves complex mechanisms of regulation, similar to those of DNA viruses. In this treatise, mouse hepatitis virus (MHV) is used as a model for the discussion of the mechanism of viral RNA synthesis. We show that MHV RNA synthesis requires interactions of multiple RNA components, which are likely mediated by protein-RNA and protein-protein, as well as RNA-RNA, interactions. This virus also provides a unique example of a discontinuous transcription mechanism, which involves a trans-acting RNA component. Finally, study of the cis-acting signals for the various steps of RNA synthesis revealed an insight into the regulation of viral RNA synthesis. This discussion suggests that the regulation of RNA synthesis in coronavirus is more complex than previously thought possible for RNA viruses. Coronavirus RNA transcription and replication may serve as a paradigm of RNA synthesis for RNA viruses in general.
Which of these is a product of photosynthesis and a requirement
for cellular respiration?
Select one:
sunlight
carbon dioxide
glucose
water
Answer:
glucose
Explanation:
Glucose is the product of photosynthesis that is required for cellular respiration, serving as an energy source converted into ATP. Option C is correct.
The product of photosynthesis that is also a requirement for cellular respiration is glucose. Photosynthesis uses sunlight, carbon dioxide (CO₂), and water (H₂O) to produce glucose (C₆H₁₂O₆) and oxygen (O₂). While glucose is utilized as a source of energy during cellular respiration, oxygen is also involved in this process but is not considered a product of photosynthesis that is used in cellular respiration.
Glucose is the crucial link between these two processes, serving as the energy source that cellular respiration converts into ATP (adenosine triphosphate), the energy currency of the cell.
Hence, C. is the correct option.
The complete question is:
Which of these is a product of photosynthesis and a requirement
for cellular respiration?
Select one:
A) sunlight
B) carbon dioxide
C) glucose
D) water
Simulation ionic and covalent bonding
A propane stove burned 470 grams propane and produced 625 grams of water (this is the actual yield) C3H8 +5O2=3CO2+4H20. What was the percent yield of water for the stove?
I would really appreciate the help. I don't understand how to begin.
Answer:
81.3%
Explanation:
Step 1:
The balanced equation for the reaction:
This is shown below:
C3H8 + 5O2 —> 3CO2 + 4H2O
Step 2:
Data obtained from the question. This includes:
Mass of propane (C3H8) = 470 g
Actual yield of water (H2O) = 625 g
Percentage yield of water (H2O) =?
Step 3:
Determination of the mass of propane (C3H8) burned and the mass of water (H2O) produce from the balanced equation. This is illustrated below:
C3H8 + 5O2 —> 3CO2 + 4H2O
Molar Mass of C3H8 = (3x12) + (8x1) = 36 + 8 = 44g/mol
Molar Mass of H2O = (2x1) + 16 = 2 + 16 = 18g/mol
Mass of H2O from the balanced equation = 4 x 18 = 72g
From the balanced equation above,
44g of C3H8 was burned and 72g of H2O was produced.
Step 4:
Determination of the theoretical yield of H2O. This is illustrated below:
From the balanced equation above,
44g of C3H8 produced 72g of H2O.
Therefore, 470g of C3H8 will produce = (470x72)/44 = 769.09g of H2O.
Therefore, the theoretical yield of H2O is 769.09g
Step 5:
Determination of the percentage yield of water (H2O). This is illustrated below:
Actual yield of water (H2O) = 625g
theoretical yield of H2O = 769.09g
Percentage yield of water (H2O) =?
Percentage yield = Actual yield/Theoretical yield x100
Percentage yield = 625/769.09 x100
Percentage yield = 81.3%
Therefore, the percentage yield of water (H2O) is 81.3%
Final answer:
The percent yield of water produced during the combustion of propane is calculated as the actual yield divided by the theoretical yield, multiplied by 100. Using stoichiometry, it is determined to be 81.35%.
Explanation:
The question is about the percent yield of water produced during the combustion of propane. The formula to calculate percent yield is actual yield divided by theoretical yield, multiplied by 100. First, we must establish the theoretical yield of water in moles. Propane has a molar mass of approximately 44.1 g/mol, so 470 grams of propane is equivalent to approximately 10.657 moles (470g / 44.1g/mol). The balanced equation states there are 4 moles of water produced per mole of propane, which would yield 42.628 moles of water (10.657 moles C3H8 x 4 moles H2O). Since the molar mass of water is about 18.015 g/mol, we multiply the moles of water by its molar mass to find the theoretical yield in grams: 768.311 g (42.628 moles x 18.015 g/mol). With an actual yield of 625 grams, we can now determine the percent yield: (625g / 768.311g) x 100% = 81.35%. Therefore, the percent yield of water for the stove is 81.35%.
Boiling point non example
Answer:
any thing under 212 degrees Fahrenheit
Explanation:
the boiling point of water is 212 degrees Fahrenheit so any thing below this would be a non example.
- If I initially have a gas at a pressure of 379 mmHg, a volume of 467 mL, and a temperature of
31°C, and then I raise the pressure to 621 mmHg and increase the temperature to 49°C, what
is the new volume of the gas?
Answer:
301.89 mL
Explanation:
- Use combined gas law formula
- Rearrange that formula to fit values then plug them in.
- Be sure to change C to K
Hope that helped! Let me know if you need further explanation.
What substance is removed from the air by living things for respiration?
Answer:
If i'm correct it is carbon dioxide. If i'm not correct sorry!
Explanation:
To solve this we must be knowing each and every concept behind respiration. Therefore, oxygen is the substance which is removed from the air by living things for respiration.
What is respiration?Respiration is a mechanism that happens within cells to produce energy by breaking down glucose molecules. The process may be neatly separated into two groups based on the usage of oxygen: anaerobic and aerobic respiration.
Many people believe that humans as well as other multicellular creatures solely employ aerobic respiration. This is countered by the fact that human muscles perform anaerobic respiration during strenuous activity, creating lactic as a waste byproduct instead of carbon dioxide. Oxygen is the substance which is removed from the air by living things for respiration.
Therefore, oxygen is the substance which is removed from the air by living things for respiration.
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i need helppp(science)
Answer:
Flat plains because when the magma flies out the spews out the volcano it will sinks to the ocean floor it rise and then once more eruptions come the magma will form with land that was previously there.
Explanation:
Consider the following step of a reaction mechanism.
A+B___>D+E (slow)
Which statement identifies a reaction intermediate?
A, if it is used in a later step
B, if it is produced in an earlier step
D, if it is used in an earlier step
E, if it is produced in a later step
Answer:
i think it's D I'm not sure...
Answer:
b, if it produced in an earlier step
Explanation:
i got it right :) hope this helps!!
Benzene is a non-polar molecule, meaning that it does not have a positive or negative side. Which statement BEST describes how benzene will dissolve in water? A) Benzene can only exist as a gas and gases will not dissolve in water. B) Benzene dissolves well in water since polar molecules dissolve well in polar solvents. C) Benzene will dissolve in water because water is a universal solvent; it will dissolve anything. D) Benzene will not dissolve well in water since non-polar molecules do not dissolve in polar solvents.
Answer:
D) Benzene will not dissolve well in water since non-polar molecules do not dissolve in polar solvents.
Explanation:
Benzene is nonpolar because it is a symmetrical molecule in which all the bond dipoles cancel.
Polar solvents have large dipole moments or partial charge; they contain bonds between atoms with very different electronegativities.
Polar solvents like water cannot dissolve non-polar substances like benzene.
Benzene can only be dissolved by other non-polar solvents like n-hexane, carbon tetrachloride [tex](CCl_{4} )[/tex], e.t.c.
Help please (chemistry homework)
Answer:
1. LiCl - Lithium chloride
2. Li2O - Lithium oxide
3. CaFl2 - Calcium fluoride
4. MgCl2 - Magnesium chloride
5. KNO3 Potassium nitrate
6. Be3P2 Beryllium phosphide
Explanation:
- You just need to know the rules of naming compounds and doing formulas. If you would like more help with this or further explanation please let me know. Hope this helps!
You and a friend both roll a die at the same time. On the first roll, the dots on the two dice add up to 7. The second roll, they add up to 2. Which do you think was more likely, rolling a total of 2 or a total of 7? Explain your answer
Answer:
rolling a 7
Explanation:
Because to roll a 2 you'd need double one's and to roll a 7 you'd need 2 different numbers so you'd have a better chance of rolling 2 different numbers than rolling the same numbers.
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Rolling a total of 7 is more likely than a total of 2 when two dice are rolled because there are more combinations (six) that add up to 7 compared to only one combination that adds up to 2.
Explanation:Rolling a total of 7 is more likely than rolling a total of 2 when two six-sided dice are rolled. To determine the probability of these outcomes, we must consider all possible combinations that each die can produce. The sum of 7 can be achieved with six different combinations: (1,6), (2,5), (3,4), (4,3), (5,2), and (6,1). On the contrary, the sum of 2 can only be achieved with one combination: (1,1).
Since a fair six-sided die has an equal chance of landing on any one of its faces, each combination above has an equal chance of occurrence. Therefore, the probability of rolling a sum of 7 with two dice is 6/36 (since there are 6 favorable combinations out of a total of 36 possible combinations when two dice are rolled), which simplifies to 1/6. Meanwhile, the probability of rolling a sum of 2 is only 1/36, because there is only one favorable combination.
Hence, rolling a total of 7 has a higher probability than rolling a total of 2, since 1/6 is greater than 1/36.
protein in foods are broken down into amino acids through what process? Explain your answer.
a. adsorption
b. elimination
c. chemical digestion
d. mechanical digestion
Final answer:
Proteins in food are broken down into amino acids through chemical digestion, a process that takes place mainly in the small intestine with the help of enzymes. This is different from mechanical digestion, which physically breaks down food without changing its chemical composition. The resulting amino acids are then absorbed in the small intestine.
Explanation:
Proteins in foods are broken down into amino acids through the process of chemical digestion. This process involves the reduction of complex proteins into their chemical building blocks, amino acids, which can then be absorbed into the bloodstream to nourish the cells of the body. Most of chemical digestion occurs in the small intestine, particularly in the duodenum, where enzymes break down proteins. It is important to differentiate this process from mechanical digestion, which refers to the physical breakdown of food into smaller pieces through actions such as chewing, without altering the chemical composition of the food.
The absorption of nutrients, primarily in the small intestines, follows digestion. The amino acids, once liberated from the proteins by chemical digestion, are absorbed through the walls of the small intestine and enter the bloodstream for distribution to the body's cells. This process is fundamental because proteins in the diet are not directly absorbed but must first be broken down into their constituent amino acids.
How many moles of CCl4 are there in 34.99 g?
What energy transformations occur when using a curling iron?
Answer:
chemical energy to thermal energy
Explanation:
Then the person must click the on button once this occurs the electrical energy is transformed into thermal energy. There are other types of flat irons such as using water to create steam to straighten the hair or using a chemical called butane this is chemical energy which is later transformed into thermal energy.
Explanation:
Electrical energy is transformed to heat energy when the curling iron stays on. Heat energy is transferred to the hair that is being curled.
After applying the keratin treatment to Kimi's hair and blowdrying it, Chelsea should set her flat iron to what temperature
The statement for flat iron temperature is "450°F (i.e., 230°C)."
What is temperature?Temperature is the measurement of a body's level of hotness or coolness.
The average kinetic energy of the system is measured by temperature. The kinetic energy of particles in a matter raises as they move faster, which boosts the temperature of the system. When two bodies of differing temperatures come into touch, heat is the energy exchanged between them.
Fine hair strands should be kept at 350–375 degrees Fahrenheit , whereas coarse or thick hair should be at 400–450 degrees Fahrenheit.
Wavy hair can become flat due to heat damage, losing the texture. For some context, 450 degrees Fahrenheit is the temperature at which semi-permanent keratin straightening procedures are performed.
Chelsea should set her flat iron to 450 degrees Fahrenheit, that is 230 degrees Celsius after applying the keratin treatment on Kimi's hair and blow drying it.
Hence, the correct answer is 450°F (i.e., 230°C).
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Which of the following characteristics are true of enzymes? Check all that apply.
The structure of an enzyme can change if conditions change.
A single enzyme can normally catalyze a wide variety of reactions under many conditions
Enzymes are found only in nonliving systems.
2 Enzymes allow living things to regulate body conditions through feedback mechanisms.
Enzymes bind to specific substrates in specific ways.
Enzymes increase the rate of reaction.
When shown in energy-reaction diagrams, enzymes represent the higher activation energy.
Answer:
The structure
Enzymes allow
Enzymes blind
Emzymes increase
Explanation:
Enzymes are biological catalysts that are essential to the functioning of living things. They are able to adapt their structure in response to various circumstances, which allows them to perform catalytic tasks with flexibility.
One enzyme can catalyse a wide variety of processes, which adds to the metabolic flexibility. Through feedback mechanisms, enzymes give organisms the ability to control physiological circumstances and maintain homeostasis.
Enzymes increase reaction speeds by lowering activation energy barriers by precisely binding to particular substrates. Cells can function well thanks to this catalytic process.
Thus, on the contrary, enzymes reduce the activation energy, speeding up processes. Enzymes are dynamic organisms at the centre of biological processes that expertly direct molecular changes.
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What will happen if an electric current is flowing through a cord and a magnet is brought near the cord?
The choices are
The resistance of the wire will decrease
It will exert a force on the voltage
It will exert a force on the electric current
The electric current will stop flowing
Answer:
The magnet will exert a force on the electric current
Explanation:
The electric current flowing through the cord will experience magnetic force due to presence of magnetic field created by the magnet brought near it.
The magnitude of the magnetic force experienced by this flowing current is given as;
F = qvB
where;
q is charge of electron (measured in coulomb's, C)
v is the speed of the flowing current (m/s)
B is the magnetic field strength (T)
Therefore, the magnet will exert a force on the electric current
What are some physical properties in a water hat?
M+e → M?
Has M lost or gained an electron?
Answer:
m lost an electron coz it transffered it
Read the temperatures shown to the nearest 0.5°C.
40
Е
с
DONE
DONE
Answer: 37.0 °C , 42.5 °C
Explanation:
Answer:
1st one - 37.0
2nd one - 42.5
Explanation:
Complete each nuclear reaction equation.
Nitrogen transmutes to form an isotope of oxygen. The superscript for oxygen is
.
The subscript for hydrogen is
Cobalt-59 accepts a neutron to form a new isotope. The subscript for cobalt is
The transmutation of Cobalt-59 by accepting a neutron is shown by;
[tex]59/27 Co + 1/0 n ------ > 60/27Co[/tex]
What is a nuclear reaction equation?A nuclear reaction equation has to do with the change of one isotope of an element to an isotope of another element most times, owing to the bombardment of a small particle.
The transmutation of nitrogen to oxygen is shown by; [tex]14/7N + 4/2He ---- > 17/8O + 1/1p[/tex]
The transmutation of Cobalt-59 by accepting a neutron is shown by;
[tex]59/27 Co + 1/0 n ------ > 60/27Co[/tex]
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Answer:
1- 17
2- 1
3- 27
Explanation:
A gas sealed in a drum container occupies 7.70 L at a sizzling 325C degrees. What will the volume be if the drum is quickly chilled at 9C degrees.
The volume of the drum after chilled quickly is 3.6 L.
Explanation:
As per the Charles Law, for any gas at constant pressure, volume of the gas is in direct proportion with the temperature measured in Kelvin. As the temperature increases, the gas expands and vice versa.
[tex]$\frac{V1}{T1} = \frac{V2}{T2} \\[/tex]
After chilling the drum, the volume will get reduced and it can be found as,
V2 = [tex]$\frac{V1T2}{T1}[/tex]
= [tex]$\frac{7.7 L \times 282 K}{598 K}[/tex]
= 3.6 L
Here the drum is chilled quickly, that is temperature is reduced and so the volume also decreases.
Will heating generally increase or decrease the amount of solid solute that will dissolve in the solution?
A. Increase
B. Decrease
Answer:
A: Increase
Explanation:
The temperature of a sample of iron with a mass of 10.0g changed from 50.4 degrees C with the release of 114J. What is the specific heat of iron ?
Answer:
[tex]c = 449 \: j \: kg {}^{ - 1} \: k {}^{ - 1} [/tex]
what is the pressure of 62.76 g of carbon dioxide (CO2) gas if it occupies a volume of
35,000 mL at standard temperature?
Answer:
P = 995.6 atm
Explanation:
assuming ideal gas:
PV = RTn∴ Tst = 25°C ≅ 298 K
∴ V = 35.00 mL = 0.035 L
∴ molar mass CO2 = 44.01 g/mol
∴ mass CO2(g) = 62.76 g
⇒ mol CO2(g) = (62.76 g)*(mol/44.01 g) = 1.426 mol
∴ R = 0.082 atm.L/K.mol
⇒ P = RTn/V
⇒ P = ((0.082 atm.L/K.mol)*(298 K)*(1.426 mol)) / (0.035 L)
⇒ P = 995.6 atm
Answer:
The pressure of the carbon dioxide (CO2) gas is 0.913 atm
Explanation:
Step 1: Data given
Mass of carbon dioxide (CO2) = 62.76 grams
Molar mass of carbon dioxide (CO2) = 44.01 g/mol
Volume = 35000 mL = 35 L
Standard temperature = 273 K
Step 2: Calculate moles CO2
Moles CO2 = mass CO2 / molar mass
Moles CO2 = 62.76 grams / 44.01 g/mol
Moles CO2 = 1.426 moles
Step 3: Calculate the pressure
p*V = n*R*T
⇒with p = the pressure of the gas
⇒with V = the volume of the gas = 35 L
⇒with n = the moles of the gas = 1.426 moles
⇒with R = the gas constant = 0.08206 L*atm/mol *K
⇒with T = the temperature = 273 K
p = (n*R*T) / V
p = (1.426 * 0.08206 * 273) / 35
p = 0.913 atm
The pressure of the carbon dioxide (CO2) gas is 0.913 atm