Answers
Answer:
carbohydrates, lipids, proteins, and nucleic acids.
Explanation:
Carbohydrates serve several key functions in your body. They provide you with energy for daily tasks and are the primary fuel source for your brain's high energy demands.
The functions of lipids include storing energy, signaling, and acting as structural components of cell membranes. Lipids have applications in the cosmetic and food industries as well as in nanotechnology.
Protein has many roles in your body. It helps repair and build your body's tissues, allows metabolic reactions to take place and coordinates bodily functions. In addition to providing your body with a structural framework, proteins also maintain proper pH and fluid balance.
The functions of nucleic acids have to do with the storage and expression of genetic information. Deoxyribonucleic acid (DNA) encodes the information the cell needs to make proteins. A related type of nucleic acid, called ribonucleic acid (RNA), comes in different molecular forms that participate in protein synthesis.
Related Questions
Two gases, helium and X, are released from one end of an evacuated long cylinder at the same time. If it takes the helium atoms 3 times faster than gas X to effuse from one end of the cylinder to the other end, what is gas X?
Answers
Answer:
The correct answer is HOF gas.
Explanation:
Based on the given information, the helium atoms effuses three times faster in comparison to the gas X.
The rate of effusion is determined by,
r is inversely proportional to 1/√M, here M is the molecular mass of the gas.
and r is inversely proportional to 1/t, here t is the time taken for effusion.
Thus, t is directly proportional to √M
The molecular mass of He is 4.
tHe = tX/3 (Here tx is the time taken for gas X)
The molecular mass of X is not known.
tX/tHe =√Mx/MHe
3 = √Mx/4
By squaring both the sides we get,
9 = Mx/4
Mx = 36
36 is the molecular mass of gas HOF, that is, (1+16+19 = 36). Hence, the gas X is 36.
What is the empirical formula for a compound that has 57.5%
Na, 40.0% 0, and 2.5% H?
a
Naz(OH)4
b
Na(OH)2
С
Na(OH)
d
Naz(OH)
Answers
Answer:
c
Explanation:
use %composition given to calculate emperical 4mular
The empirical formula of the compound having 57.5% Na, 40.0% O, and 2.5% H is NaOH (Option C)
Data obtained from the questionNa = 57.5%O = 40%H = 2.5%Empirical formula =?How to determine the empirical formulaDivide by their molar mass
Na = 57.5 / 23 = 2.5
O = 40 / 16 = 2.5
H = 2.5 / 1 = 2.6
Divide by the smallest
Na = 2.5 / 2.5 = 1
O = 2.5 / 2.5 = 1
H = 2.5 / 2.5 = 1
Thus, the empirical formula of the compound is NaOH
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wich of the following solute and solventis not belong to suspension mixture
A.sticky, creamy subtances
B.clear, pure subtances
C.dark, black subtances
D.clear, flowless sunbtances
Answers
b is your best bet hope this helps
13. When pentane undergoes complete combustion, the products are carbon dioxide and water.
C5H12
+ 02 →
CO2 +
H20
What are the respective coefficients when the equation is balanced with the smallest whole numbers?
a. 1,5, 3, 4
b. 2, 6, 5, 6
c. 1, 8, 5,6
d. 2, 16, 10, 12
Answers
Answer:
i think c
Explanation:
:D
if T1=454 K and T2=356 K atm and V1=101.85 mL. then what is V2? please help asap!!!
Answers
Answer:
opp
Explanation:
The term "cycle" is used in Water Cycle because ?
Answers
Answer:
because cycle is a prosess that goes through multiple stages
Explanation:
.
What is the mass number of an atom that consists of 20 protons, 20 neutrons, and 18 electrons?
Answers
Answer:
C)a mass number of 38
Explanation:
yes
which statement best describes what happens during mitosis
Answers
Answer:
Osmosis is a process which occurs when there is a difference in solute concentration between two solutions separated by a semipermeable membrane. A semipermeable membrane allows passage of water but not of solutes. The passage of water occurs because of a pressure difference of water between the two solutions
Pb in tetraethyl lead, Pb(C2H5)4 (once extensively used as an additive to gasoline to prevent engine knocking)
Express your answer using four significant figures. Determine the percent,by mass, for Pb
Answers
The percent mass of lead in tetraethyl lead is 64.1%.
What is the percent by mass of Pb in tetraethyl lead, Pb(C₂H₅)₄?The percent by mass of an element in a compound is determined by taking the ratio of the atomic mass of the element and the molar mass of the compound and then multiply by 100%
Percent mass = (atomic mass of element/molar mass of compound) * 100%atomic mass of Pb = 207
atomic mass of C = 12
atomic mass of H = 1
Molar mass of tetraethyl lead: 207 + 12 * 2 * 4 + 1 * 5 * 4
Molar mass of tetraethyl lead = 323 g/mol
Percent mass of Pb = 207/323 × 100%
Percent mass of Pb = 0.6408 × 100%
Percent mass of Pb = 64.1%
In conclusion, the percent mass of lead in tetraethyl lead is 64.1%.
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A person has a mass of 63.4kg. What is the weight in pounds?
Answers
Make the following conversion.
954 g= _ kg
0954000
95400
0.954
0.0954
Answers
Answer:
0.954
Explanation:
1000 grams is 1 kg
954 grams is 954/1000 kg or 0.954
If an electron falls from the n = 2 to the n = 1 energy levels in a Hydrogen atom what wavelength of light is emitted?
Answers
Answer:
Ultraviolet
Explanation:
It doesn't use much energy and so it creates ultraviolet light.
List 3 properties of the hair’s cuticle.
Answers
Which of the following are kept as a constant in Boyle's law (check all that
apply)
volume
temperature
amount
pressure
none of these
Answers
Answer:
temperature
amount
Explanation:
Under the postulate of Boyle's law, both temperature and amount(number of moles) are kept constant.
According to Boyle's law "the volume of a fixed mass of gas varies inversely as the pressure changes if the temperature is constant"
Based on the premise of this law, both temperature and amount of substance is kept constant.
What is the mass of 3.99 mol of nickel?
Answers
Answer:
234.213
Explanation:
Moles of Nickel x 58.70 = Grams
3.99 x 58.70 = 234.213
How many moles of sulfur dioxide (SO2) are required to produce 5.0 moles of sulfur (S) according to the following balanced equation? SO2 + 2H2S - 3S + 2H2O
Answers
Answer:
1.67 moles
Explanation:
From the balanced equation of reaction:
[tex]SO_2 + 2H_2S -> 3S + 2H_2O[/tex]
1 mole of sulfur dioxide, SO2, is required to produce 3 moles of sulfur, S.
If 1 mole SO2 = 3 moles S, then, how many moles of SO2 would be required for 5 moles S?
Moles of SO2 needed = 5 x 1/3
= 5/3 or 1.67 moles
Hence, 1.67 moles of SO2 would be required to produce 5.0 moles of S.
Answer: 1.7
Explanation:
easons for the dense packing in metals
Answers
Explanation:
Typically, only one element is present, so all atomic radii are the same. -Metallic bonding is not directional. -Nearest neighbor distances tend to be small in order to lower bond energy.
If the pH of a certain solution changes from 8 to 9, what happens to the hydrogen ion concentration
Answers
The concentration of OH⁻ ions will become 10 times the initial concentration.
What is indicated by the hydrogen ion concentration?A more useful approach to express the concentration of hydrogen ions is on the pH scale, which is the logarithm of the reciprocal of the hydrogen ion concentration in gram moles per liter. The concentrations of the hydrogen ion (H+) and the hydroxyl ion (OH) are both equal to 10⁻⁷ in a neutral solution. The pH of seven is neutral.
Solution pH 1 equals 8.
Solution's pH is 2 = 9.
pOH₁ = 14 - 8 = 6
pOH₂ = 14 - 9 = 5
OH₁⁻ = 10⁻⁶
OH₂⁻ = 10⁻⁵
Ratio = 10⁻⁵ / 10⁻⁶ = 10
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why is the cell wall so important to the plant cell???
Answers
Explanation:
Cellulose fibers, structural proteins, and other polysaccharides help to maintain the shape and form of the cell. Additional functions of the cell wall include: Support: The cell wall provides mechanical strength and support. It also controls the direction of cell growth.
A 1599 kg car is traveling down the road at 83.4 km/h. While traveling at this rate of speed, what is the kinetic energy of this vehicle in kilojoules?
Ek=
A 56.87 g sample of a substance is initially at 30.0 °C. After absorbing 1475 J of heat, the temperature of the substance is 138.4 °C. What is the specific heat ( ) of the substance?
c=
Answers
The kinetic energy of 429 kJ and the specific heat of the substance is 9059 g kJ °C
The kinetic energy is given as ,
K.E = 1/2 m[tex]v^{2}[/tex]
Where m = mass = 1599 kg
v = velocity = 83.4 km/h = 23 m/s
Putting the value mass and velocity in equation ( i ) we get ,
K.E = 1/2 × 1599 kg × 23 m/s × 23 m/s = 429074.86 J = 429 kJ
Specific heat is calculated as ,
Q = mcΔT
mass of the substance ( m ) = 56.87 g
c = 1475 J
ΔT = 138.4 °C - 30.0 °C = 108 °C.
Putting the value of mass , change in temperature and heat absorbed in equation ( ii ) we get ,
Q = 56.87 g × 1475 J × 108 °C = 9059391 gJ°C = 9059 g kJ °C
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If the loss of 3500 kcal is equal to a loss of 1.0 lb, how many does will it take Charles to loose 5.0 lb
Answers
If it takes 3500kcal to lose 1.0 than it takes 5 times that to lose 5.0.
3500 x 5 = 17500kcal
Zn(s) + 2HCl(aq) > H2(g) + ZnCl2 (aq)
When 25.0g of Zn reacts, how many mols of HCl are consumed?
A. 0.0171 B. 1.5 C. 0.76 D. 22.4 E. 0.38
Answers
When 25.0g of Zn reacts, mols of HCl are consumed 0.7648 moles HCl
Write down the balanced chemical equation for this one replacement reaction first.
Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)↑⏐
Now take note of the 2:1 mole ratio of reaction between the two reactants. This demonstrates that the reaction will always use up two times as much hydrochloric acid as zinc metal.
As you are aware, a solution's molarity indicates the number of moles of solute—in your case, hydrochloric acid, HCl—that are present in one liter of the solution.
The molarity of the hydrochloric acid solution is reported to be
3.05 mol L−1. This indicates that for every 1 L of solution, 3.05 moles of hydrochloric acid are produced. Remember this for later. You are aware that the reaction needs 25.0 g of zinc.
By using the molar mass of zinc, you can convert this mass to moles.
25 g per mole Zn
65.38g = 3.824 moles of zinc
n order for this many moles of zinc to react, you'd need
0.3824moles Zn⋅2amoles
HCl 1 mole Zn=0.7648 moles HCl
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The density of silver is 10.5 g/cm³. A students performs three trials of an experiment and obtains the
following results: 14.2 g/cm³, 14.0 g/cm³, and 7.25 g/cm³. Are these results accurate? Explain. Are the
results precise? Explain.
Answers
Results are neither precised nor accurate.
In the Given Actual density of silver =10.5 g / cm^3
Measured values of silver density = 14.2 g/cm^3
14.0g/cm^3
7.25g/cm^3
We have to find whether the measurements given are accurate or precise.
so , Density can be defined as the ratio of mass to volume. The formula for calculation of density is shown below :
Density = Mass / Volume
The units of density is generally g / ml.
The results are said to be accurate if our measured value exactly matches with our true value.
In case of precision ,all the measured values should be near to each other or should differ only by 0.1 or 0.2.
So in this case the measured values are not precised nor accurate because it does not matches with true value also.
Hence , the results are neither precised nor accurate.
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which subatomic particle made out of protons neutrons and electrons can charge and still be considered the same element
Answers
Answer:
Proton
Explanation:
Calcium carbonate is a white mineral. A chemist heats calcium carbonate, CaCO3, to produce carbon dioxide, CO2, and a white powder, CaO. The following chemical equation shows the reaction.CaCO3 → CO2 + CaO Explain why the products have different properties than the reactants
Answers
Answer:
A chemical change has occurred
Explanation:
Given reaction expression:
CaCO₃ → CaO + CO₂
The reaction is a decomposition reaction in which a compound is dissociated into simple products.
The reason why the products have different properties than the reactants is because a chemical change has occurred.
A chemical change is accompanied by the formation of a new productSuch new products have different properties compared to the compound that forms them. Therefore, the products and reactants are different chemically due to chemical change that has occurred.The products of the decomposition of calcium carbonate have different properties because a chemical change has occured in the reaction to form new substances.
CHEMICAL CHANGE:A chemical change is a type of change in which new products are formed. The bonds of the reactants are broken and rearranged to form entirely new substances. According to this question, calcium carbonate is a white mineral, which when heated produces carbon dioxide, CO2, and a white powder, CaO as follows: CaCO3 → CO2 + CaOThe products in this reaction are different in their properties from the reactants because a chemical change has caused new substances to be formed.Learn more about chemical change at: https://brainly.com/question/1161517?referrer=searchResults
HELPPPP give me an example of thermal energy and describe what is happening at particle level.
Answers
Answer:
Thermal energy (also called heat energy) is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy.
Explanation:
will this help you
Ques. A uniform cylinder of mass 4.3 kg and radius 0.4 m rolls down a ramp inclined at an angle 0.15 radians to the horizontal. What is the acceleration of the cylinder in m/s2 ?
Answers
The acceleration of the cylinder in m/s2 is 0.973 meters per seconds squared.
What is acceleration?Acceleration is the change of velocity with time. The unit is usually meters per seconds squared.
mass = 4.3 kg
radius = 0.4m
angle of inclination, ∅ = 0.15 radians
How to solve acceleration of the cylinder in m/s^2acceleration of the cylinder in m/s^2
= ( g + sin ∅ ) / 1 + 0.5
= ( 9.81 + sin 0.15 ) / 1.5
take note angle is in radians not degrees
= 1.46 / 1.5
= 0.973 meters per seconds squared
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PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP!!
DUE IN 10 MINS
Number 9 and 10!
Answers
Answer:
the answer is your a awesome person
1. Why the names such as sodium(l) chloride for NaCl and
magnesium(II) chloride for MgCl2 are not used?
Answers
Answer:
It's because the NaCl and MgCl2 is shorter and easier to remember
what are the answers easily!!!!
Answers
Answer:
True
True
Temperature
Explanation: