how many of protien consumed by humans around the world is fish?
a) 5 percent
b)20percent
c)4p percent
d)50 percent
Answers
The answer would be 20% (B)
Related Questions
Given two objects, the object with the _______________ mass will be pulled to the object with the _______________ mass.
Answers
Given two objects, the object with the least mass will be pulled to the object with the most mass.
Answer:
the answer is simple the object with the lower mass would be pulled to the object with the bigger mass
Explanation:
hope i helped
Give me some questions exam/test questions or hypothetical questions which apply the general formula for alkanes (CnH2n+2) and alkenes (CnH2n)
Answers
Explanation:
CnH2n−2
is the formula for ____________.
Calculate the mass defect and nuclear binding energy per nucleon ofthe each of the nuclides indicated below.Part A) Li-7 (atomic mass = 7.016003 )Express your answer using five decimal places.Mass Defect=
Answers
the mass defect of Li-7 is -0.035279 u and the nuclear binding energy per nucleon is 5.60553 × 10⁻¹² J/nuclide.
Given data:
Atomic mass of Li-7, A = 7.016003
The atomic mass of Li-7 is the sum of the number of protons and neutrons in it. Therefore, the number of neutrons in Li-7 is:
Neutrons = Atomic mass - Protons= 7.016003 - 3= 4.016003The mass of 3 protons and 4.016003 neutrons in Li-7 is: Mass of protons + Mass of neutrons = (3 x 1.007276) + (4.016003 x 1.008665) = 3.021828 + 4.029454 = 7.051282 u
Therefore, the mass defect in Li-7 is:
Mass defect = Actual mass - Calculated mass
= Atomic mass - Mass of protons and neutrons
= 7.016003 - 7.051282
= -0.035279 u
Nuclear Binding Energy per nucleon (BE/A) can be calculated using the formula:
BE/A = [Δm.c² / A]
where Δm is the mass defect and c is the speed of light which is 2.998 × 10⁸ m/s.
Substituting the values in the above formula:
BE/A = [(-0.035279) × (2.998 × 10⁸)² / 7]= 5.60553 × 10⁻¹² J/nuclide
Therefore, the mass defect of Li-7 is -0.035279 u and the nuclear binding energy per nucleon is 5.60553 × 10⁻¹² J/nuclide.
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what is the value of the equilibrium constant, k, at 25 oc for the reaction between the pair: sn(s) and pb2 (aq) to give pb(s) and sn2 (aq) ?
Answers
The value of the equilibrium constant, K, at 25 °C for the reaction between the pair : Sn(s) and Pb₂ (aq) to give Pb(s) and Sn₂ (aq) is 2.17.
The half reaction are given as follows :
Sn ----> Sn²⁺ + 2e⁻ reductional potential = 0.14 V
Pb²⁺ + 2e⁻ -----> Pb oxidation potential = - 0.13 V
The E° cell = 0.14 - 0.13
= 0.01 V
using the formula given as :
E° cell = 0.0592 / n (log K)
where n = number of electron
0.01 = 0.0592 / 2 (log K)
k = 2.17
The equilibrium constant K = 2.17
Thus, The value of the equilibrium constant, K, at 25 °C for the reaction between the pair : Sn(s) and Pb₂ (aq) to give Pb(s) and Sn₂ (aq) is 2.17.
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please help :(.
Which is true about scientific theories?
Answers
Answer:
b
Explanation:
i think its b because theories are usually developed after many experiments/tests by different scientists. at least i think so lol i dont remember too much from biology
Pls help need by tomorrow.
What were the manipulated, responding, and one controlled variable from Spallanzani's
experiment?
Answers
Answer:
Answer here!
Explanation:
One controlled variable can be that they used the same setup, that is the constant between the two experiments. The manipulation was that Spallanzani used a flask without any air and a flask with air. The responding was or the dependent variable was to notice what had changed so in the experiment Spallanzani noticed that the flask with no air led to no microorganisms meaning that the theory of spontaneous generation is false.
The manipulated variable was the presence or absence of air in the flask. The responding variable was the growth of microorganisms in the broth. The controlled variable was the composition of the broth.
In Spallanzani's experiment, the manipulated variable refers to the factor that the scientist deliberately changes or manipulates. In this case, it was the presence or absence of air in the flasks. One flask had air sealed inside with the broth, while the other flask had no air present.
The responding variable is the factor that is observed or measured in response to the manipulated variable. In this experiment, the growth of microorganisms in the broth was the responding variable. Spallanzani checked for the presence or absence of microorganism growth in each flask.
The controlled variable is the factor that is kept constant or controlled throughout the experiment to ensure that it does not influence the results. In this case, the controlled variable was the composition of the broth used in both flasks. The broth composition was consistent, ensuring that any differences observed in microorganism growth could be attributed to the presence or absence of air.
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What is the most important role that water plays for living organisms?
A. All organisms need water as energy source.
B. All organisms need water to transport chemicals into their cells.
C. All organisms live in the water
D. All organisms need water to stay clean
Answers
Answer:
A. All organisms need water as energy source
____ power is generated from the heat released when uranium atoms split in a process known as fission.
Answers
Which of the following statements on HPLC modes is true? A. Increasing the polarity of the mobile phase decreases the elution time of polar compounds in normal-phase HPLC B. A non-polar stationary phase is used in normal-phase HPLC C. Compounds have a lower attraction to the mobile phase than to the stationary phase in displacement development D. A polar stationary phase is used in reversed-phase HPLC E. More polar compounds elute first in normal-phase HPLC
Answers
The following statements on HPLC modes are true is more polar compounds elute first in normal-phase HPLC (Option E).
The liquid chromatography (HPLC) is a technique in analytical chemistry employed for the separation, identification, and quantification of elements. It is considered a highly sensitive method, and it works by separating the components in a mixture with the assistance of a solvent under high pressure.
There are two modes of HPLC: Reversed-Phase HPLC (RP-HPLC) and Normal-Phase HPLC (NP-HPLC). In RP-HPLC, a nonpolar stationary phase, such as C18, is used, and polar solvents, such as water, are used as mobile phases. Polar stationary phases, such as silica gel, are used in NP-HPLC, while nonpolar solvents, such as hexane, are used as mobile phases.
More polar compounds have a greater affinity for the polar stationary phase than less polar compounds, which have a higher affinity for the nonpolar mobile phase in NP-HPLC. As a result, less polar compounds elute first in normal-phase HPLC.
Thus, the correct option is E.
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Why is density of a substance independent of sample size?.
Answers
Answer:
. Density is an intensive property, meaning that it does not depend on the amount of material present in the sample
Explanation:
In chemistry there are two kind of property that exist are Intensive property and extensive property. Density is an intensive property as it is independent of amount of matter.
What is intensive property?Intensive property is a property that tells about the dependence of a property on Quantity of a matter over which study has been done.
Mass and volume are extensive property, these depend on the quantity of substances. Whenever two extensive property are divided then the final answer is always intensive So, density is division of mass of volume. Hence Density is an intensive property.
Example of Intensive property are specific gravity, heat capacity, melting point and boiling point . Examples of extensive property are weight and internal energy.
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Select the correct answer from A, B, C, D & E for each statement given below:
A: Anthracite B: Diamond
C: Carbogen D: Urea E: Lampblack
1. An allotrope of carbon used as a tip for deep boring drills.
2. The type of coal with the highest carbon content.
3. An allotrope of carbon, obtained by burning kerosene oil in a limited supply of air.
4. A nitrogenous fertilizer obtained from carbon dioxide.
5. A compound which finds use for a victim of carbon monoxide poisoning.
Answers
Answer:
Didn't know the answer, sorry.
Carbon tetrachloride is a colorless liquid. How many molecules of carbon tetrachloride are in 6.32 mg of that compound?
a. 2.47 x 10^19
b. 5.85 x 10^23
c. 6.82 x 10^29
d. 1.64 x 10^24
Answers
Option A.
The number of molecules of carbon tetrachloride in 6.32 mg of the compound is 2.47 x 10¹⁹ molecules.
What is the molecular mass of Carbon tetrachloride?The molecular mass of Carbon tetrachloride is calculated as follows;
Molecular formula = CCl₄
CCl₄ = (12) + (35.5 x 4)
CCl₄ = 154 g/mol
The number of moles of carbon tetrachloride in 6.32 mg is calculated as follows;
n = reacting mass / molar mass
n = (6.32 x 10⁻³) / (154)
n = 4.1 x 10⁻⁵ moles
1 mole of CCl₄ = 6.02 x 10²³ molecules
4.1 x 10⁻⁵ moles of CCl₄ = ?
= 2.47 x 10¹⁹ molecules
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Bohr – proposed that electrons in an atom are found in ___________ ____________.
Answers
Answer: Around the atomic center of an atom :)
Explanation:
hope this helps you lad
have a great day and stay safe :)
Answer:
atomic center
Explanation:
g You need a 60% alcohol solution. On hand, you have a 55 mL of a 5% alcohol mixture. You also have 65% alcohol mixture. How much of the 65% mixture will you need to add to obtain the desired solution
Answers
C1V1 + C2V2 = C3V3
where C1 and V1 are the concentration and volume of the 5% alcohol mixture, C2 and V2 are the concentration and volume of the 65% alcohol mixture, and C3 and V3 are the concentration and volume of the final 60% alcohol solution.
Substituting the given values into the formula, we get:
0.05 x 55 mL + 0.65V2 = 0.6 x (55 mL + V2)
Simplifying and solving for V2, we get:
V2 = 8.33 mL
Therefore, you need to add 8.33 mL of the 65% alcohol mixture to the 5% alcohol mixture to obtain a 60% alcohol solution.
What is the minimum hot holding temperature for fried chicken?.
Answers
Answer:
130
Explanation:
Maintain hot food at 135°F or above. Properly cooked roasts may be held at 130°F or above.
135°F is the minimum hot holding temperature for fried chicken. The most often used scales are indeed the Celsius scale.
What is temperature?Temperature is a physiological measure that quantifies our feelings of hotness and coolness. A thermometer is used to measure temperature.
Thermometers were calibrated in a variety of temperature scales that have traditionally been defined by various reference points including thermometric substances.
The most often used scales are indeed the Celsius scale, with the unit sign °C, the Fahrenheit level (°F), as well as the Scale parameter (K), with the latter being mostly used for scientific reasons. The kelvin is one of the International System of Units' seven basic units (SI). 135°F is the minimum hot holding temperature for fried chicken.
Therefore, 135°F is the minimum hot holding temperature for fried chicken.
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within the reactor, the stationary rods are the fuel rods and contain the fuel. the rods that move up and down are the control rods. what do the little dots that move between the fuel rods represent?
Answers
The little dots that move between fuel rods represent steam.
What are the fuel rods?
A long, thin zirconium metal tube that holds the pellets of fuel for nuclear reactors made of fissionable material.
The fuel rods are bundled together into fuel assemblies, which are then put one at a time into reactor core.
The fuel rod's main functions are to maintain the fuel in a precise geometry and to act as the first line of defense between the fission products and the outside world.
Therefore, maintaining its integrity is main objective of fuel design and operating procedures for reactors.
Small ceramic pellets of low-enriched uranium oxide are the fuel used today's commercial reactors.
These fuel rods are bundled into the tall fuel assemblies, which are then put inside reactor.
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The smallest unit of a covalent compound that still retains the properties of the compound is called a(an)
Group of answer choices
electron
molecule
dipole
atom
Answers
A molecule is the smallest unit of a covalent compound that still possesses its properties.
The choice B is correct.
A group of two or more atoms joined by covalent bonds is called a molecule. In a covalent compound, like water (H₂O) or methane (CH₄), the particles are fortified together by sharing electrons.
The singular iotas inside the particle are not equipped for showing the properties of the compound, however the course of action and cooperations of the molecules inside the atom decide the compound's properties.
Therefore, B. molecule is the correct response.
Incomplete question:
The smallest unit of a covalent compound that still retains the properties of the compound is called a(an)
Group of answer choices
A. electron
B. molecule
C. dipole
D. atom
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How many moles of helium gas are contained in a 7 L flask at STP
Answers
Answer:This might not help.
At STP, a 4.0-L flask contains 0.1784 moles of helium gas.
Explanation:
At STP. temperature of the helium gas = T = 273.15 KAt STP, pressure of the helium gas = P = 1 atmVolume of the helium gas at STP = V = 4.0 L Moles of the helium gas = nUsing an ideal gas equation :n = 0.1784 mol0.1784 moles of helium gas are contained in a 4.0-L flask at STP.
En un experimento hacemos reaccionar a una solución de acido cloridico con el metal cinc. Para ello, hemos usado, 6,5g de cinc y gas hidrogeno. ¿Cual es la masa de gas obtenida? Urgente es para un examen
Answers
Answer:
0.200g de gas son obtenidos
Explanation:
La reacción de ácido clorhídrico, HCl, con Zn es:
2HCl(aq) + Zn(s) → ZnCl₂(s) + H₂(g)
Donde 2 moles de ácido reaccionan con 1 mol de Zn para producir una mol de cloruro de cinc y una mol de hidrógeno (gas)
Asumiendo que el ácido está en exceso, las moles de 6.5g de Zn (Masa molar: 65.38g/mol) son:
6.5g × (1mol / 65.38g) = 0.0994 moles de Zn
Como 1 mol de Zn produce 1 mol de hidrógeno, las moles de hidrógeno son 0.0994 moles de H₂. En gramos (Masa molar H₂ = 2.01g/mol):
0.0994 moles H₂× (2.01g / mol) = 0.200g de gas son obtenidos
Can I get help with question 13 ? I don’t understand how to solve it
Answers
Answer
10.6 liters
Explanation
What is given:
Density of the gasoline = 0.680 g/mL
Mass of the gasoline = 7.20 kg
What to find:
To find how large of a container, (volume) in liters needed to hold the gasoline.
Step-by-step solution:
Step 1: Convert the mass of gasoline from kg to g.
Conversion factor: 1 kg = 1000 g
So 7.20 kg = (7.20 kg/1 kg) x 1000 g = 7200 g
Step 2: Determine the volume in mL using the density equation.
\(\begin{gathered} Density=\frac{Mass}{Volume} \\ \\ 0.680\text{ }g\text{/}mL=\frac{7200\text{ }g}{Volume\text{ }in\text{ }mL} \\ \\ Volume\text{ }in\text{ }mL=\frac{7200\text{ }g}{0.680\text{ }g\text{/}mL}=10588.24\text{ }mL \end{gathered}\)Step 3: Convert the volume in step 2 from mL to liters.
Conversion factor: 1000 mL = 1 L
So, 10588.24 mL = (10588.24 mL/1000 mL) x 1 L = 10.58824 liters
How large of a container, (volume) in liters needed to hold 7.20 kg of gasoline is approximately 10.6 liters
What are the main group elements
Answers
Answer:
In chemistry and atomic physics, the main group is the group of elements whose lightest members are represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine as arranged in the periodic table of the elements. The main group includes the elements in groups 1 and 2, and groups 13 to 18.
why does a new flu shot need to be made each year ?
Answers
because we could be sick if don't get the shot there is a higher chance to have the flu
i hope this helps you!
5. The fusion equations show the production of atoms of several different elements,
even though each reaction begins with isotopes of hydrogen. Knowing the starting
elements, can one predict what element will form as a result of a given reaction?
Explain why or why not.
Answers
Yes, the elements that will be formed in a fusion reaction can be predicted by looking at the combining nuclides.
A nuclear reaction is one in which the nucleus of elements undergo rearrangement to form new nuclei and release energy.
Mass and charge of reactant and product nuclides are conserved in a nuclear reaction.
This implies that we can look at the reactant nuclides and predict the products of the nuclear fusion . This can be done by studying the combining nuclides and taking into cognizance, the balance of mass and charge on both sides of the nuclear reaction equation.
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Answer: Yes it is possible
Explanation: The element that is formed in a fusion can be predicted by looking at the combining elements or nuclides in this case it would be the hydrogen isotopes
Which element in row 6 of the periodic table (shown below) has the largest radius?
Select one:
a. Hg
b. Cs
c. Os
d. Rn
Answers
Answer:
Cs
Explanation:
It has less amount of proton numbers so they won't attract the electrons as much as the other elements with increased number of protons will.
what is the mass % of carbon in dimethylsulfoxide (c2h6so) rounded to three significant figures? group of answer choices 7.74 78.1 28.6 25.4 30.7
Answers
Dimethylsulfoxide has the formula C2H6SO.Therefore, the correct answer is option D: 25.4.
Option D.
To determine the mass percent of carbon in this compound, we need to calculate the molar mass of the compound first. Molar mass is the sum of the atomic masses of all the atoms in the molecule. We can use the periodic table to obtain the atomic masses. For this compound, the molar mass will be:2 (atomic mass of carbon) + 6 (atomic mass of hydrogen) + 32 (atomic mass of sulfur + 16 (atomic mass of oxygen) = 78 g/molNext, we need to determine the mass of carbon in one mole of the compound. We can do this by multiplying the number of carbon atoms by the atomic mass of carbon. In this case, there are 2 carbon atoms in one mole of the compound. Therefore, the mass of carbon in one mole of the compound is:2 (number of carbon atoms) x 12.01 (atomic mass of carbon) = 24.02 g/molFinally, we can calculate the mass percent of carbon in dimethylsulfoxide using the formula:mass percent of carbon = (mass of carbon / total molar mass) x 100%Substituting the values we obtained:mass percent of carbon = (24.02 g/mol / 78 g/mol) x 100% = 30.77%Rounding to three significant figures gives us a final answer of 30.7%.
Option D.
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A sample of oxygen gas in a closed system has a volume of 0. 225 L at a pressure of 947 kPa. What will the pressure of the gas be when the volume is reduced to 0. 216 L if the temperature remains constant?
Answers
Answer:
0.225=947
0.216=x
0.225x=947×0.216
0.225x=204.552
x=204.552/0.225
x=909.12
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!! THIS IS DUE IN 10 MINUTES!!!!!
Forensic chemists are analyzing blood samples taken from a murder victim. They run tests for any trace of substances that do not naturally occur in the bloodstream. Nothing odd registers but they do find extremely high levels of caffeine. What does this most likely indicate about the murder victim?
A) They drank a lot of coffee.
B) They worked on a coffee bean plantation.
C) They were poisoned with powdered caffeine.
D) Someone put arsenic in their coffee.
Answers
Answer:
c
Explanation:
Answer:they were poisoned with powdered caffeine (C)
Explanation:
I just took the test! And got all the points for this question :) hoped I could help
The blank is a saclike structure on a fungus that produces spores
please help NOW!
this is science
Answers
Answer:
Ascus
Explanation:
Ascus is a sac like structure on fungus.
Answer:
HI BESTAY THANKS FOR THE POINTS
Mohs Scale of Mineral Hardness Hardness Mineral Absolute Hardness 1 Talc 1 2 Gypsum 2 3 Calcite 9 4 Fluorite 21 5 Apatite 48 7 Quartz 100 8 Topaz 200 According to the Moh's Scale of Mineral Hardness, the sample mineral that will scratch gypsum but not apatite is MOST LIKELY A) calcite. B) quartz. C) talc. D) topaz.
Answers
Answer: A) calcite
Explanation:
Hardness can be defined as the ability of the mineral to resist the scratch. It is the property to judge the hardness of the mineral. Mineralogist study this property of hardness using Mohs hardness scale.
Talc is the least hard substance after that gypsum, then calcite, fluorite, and then apatite.
The gypsum can be scratched by the calcite but the calcite cannot scratch apatite as it is softer than apatite.
Which sample of matter is classified as a substance
Answers
Answer:
Elements and Compounds. Any sample of matter that has the same physical and chemical properties throughout the sample is called a substanceAny sample of matter that has the same physical and chemical properties throughout the sample.
Explanation: