Answer:
a. po tamang sagot
Explanation:
pa pafoolow po pleasr
The DNA and RNA are polynucleotides which contain a chain of nucleotides monomers with different nitrogenous bases. Each nucleotide different from the others, as It has different bases. The correct option is A.
What is a nucleotide?A nucleotide is defined as a compound containing three component units, namely a pentose sugar (either ribose or 2-deoxyribose), a heterocyclic nitrogenous base (a substituted purine or a substituted pyrimidine) and a phosphate group.
The nucleotides are the phosphate esters of nucleosides. A nucleotide containing ribose as the sugar unit is termed as the ribonucleotide. While one containing 2-deoxyribose as the sugar unit is termed as the deoxyribonucleotide.
The nitrogenous bases in RNA are adenine, guanine, cytosine and uracil whereas in DNA the bases are adenine, guanine, cytosine and thymine. The purines are adenine and guanine whereas cytosine, thymine and uracil are pyrimidines.
Thus the correct option is A.
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How many oxygen (O) atoms would a carbon (C) atom need to bond with to form a stable compound?
A.3
B.4
C.1
D.2
Which natural law do biogeochemical cycles address?
help please bjfkboweugfowbs
Answer:
B is correct answer because The enthalpy is negative so this means the reaction produces heat and the reaction is exothermic
Suggest two reasons why carbon dioxide emissions from electricity production decreased from 2012 to 2015
Answer:
global warming
Explanation:
Applying smart electric grid technologies can potentially reduce CO2 emissions.
What is a rechargeable battery?
a group of electrochemical cells that can be recharged
a group of electrolytic cells that can be recharged
a group of electrochemical cells that do not need recharging
O a group of electrolytic cells that do not need recharging
WILL GIVE BRAINLIEST
Answer:
a group of electrochemical cells that can be recharged
Help me guys ☹️please
Answer:
Coriolis Effect
Explanation:
The Coriolis Effect is caused by Earths rotation. We can not only see this affecting how winds move, but also where storms form and the movement of oceans currents.
Kelvin And Mimi studied the fruits. Kelvin concluded that there are more ovules in a mango flower than a papaya flower while Mimi
argued that there are more ovules in a papaya flower than a mango flower.
(a) who is correct?
(b)Explain your answer in (a).
Answer:
kevin is right according to what i see
Because electrons are orbiting the nucleus, the nucleus is stationary
true or false
Answer:
false, The nucleus of atoms still move around like crazy, it's just the electrons move more.
Which experiment led to the idea that atoms contain a nucleus?
Answer:
Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.
Explanation:
A balloon, inflated in an air-conditioned room at 27.0°C, has a volume
of 4.50.L. It is heated to a temperature of 57.0°C. What is the new
volume of the balloon if the pressure remains constant?
Answer:
4.95L
Explanation:
Using Charle's law equation;
V1/T1 = V2/T2
Where;
V1 = initial volume (L)
V2 = final volume (L)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the question, the following information was given:
V1 = 4.50L
V2 = ?
T1 = 27°C = 27 + 273 = 300K
T2 = 57°C = 57 + 273 = 330K
Using V1/T1 = V2/T2
4.50/300 = V2/330
Cross multiply
300 × V2 = 4.5 × 330
300V2 = 1485
V2 = 1485 ÷ 300
V2 = 4.95L
(Please help)
1.what is the most common isotope for element x
2.calculate the average atomic mass for element x
Answer:
1. Isotope with mass number 39.
2. 39.02g/mol
Explanation:
1. The most common isotope is the isotope in the higher proportion, that is:
Isotope with mass number 39.
2. The average atomic mass is the sum of the masses times their abundance. For the element X:
Average atomic mass:
38*0.0967 + 39*0.7868 + 40*0.1134 + 41*0.0031
= 39.02g/mol
An empirical research method in which data are gathered from observations of phenomena, hypothesis are formulated and tested, and conclusions are drawn that validate or modify the original hypothesis is known as the: Group of answer choices Gotham theory Scientific Method Niels-Bohr hypothesis Entropy theory
Answer:
Scientific Method
Explanation:
Science is empirical in nature. The entire purpose of science is to discover new knowledge.
The empirical research method in science all begins with gathering observations from phenomena. After that, the researcher formulates appropriate hypothesis which are rigorously tested.
The conclusions drawn from testing the original hypothesis validate or modify the original hypothesis.
Can anyone answer these 4 questions?
Answer:
1. Na2CO3 + 2HCl --> 2NaCl + CO2 + H2O
2. 2NaOH + H2SO4 --> Na2SO4 + H2O
3. CaCO3 + 2HCl --> CaCl2 + CO2 + H2O
4. 4Na + O2 --> 2Na2O
Help asappppp quickly only right answers aloud
Answer:
Inference
Explanation:
A conclusion reached on the basis of evidence and reasoning is called an inference.
Help me and I'll make u Brainliest eat and follow u
19. place moth balls in the closet and observe after several days.
20. whenever wax or a candle burns it turns from solid to liquid but again at room temperature it turns to solid
21. evaporation, condensation, precipitation
22. it produces new substances
23. vinegar Bubbles when baking soda is added
24. steam
If 1000. mL of water freezes, which of the following is a reasonable approximation for the volume of the resulting ice?
Group of answer choices
1000. mL
961 mL
1040 mL
No answer text provided.
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Answer:
If 1000. mL of water freezes, which of the following is a reasonable approximation for the volume of the resulting ice?
Group of answer choices
1000. mL
961 mL
1040 mL
Explanation:
Ice is fewer denser than water.
The reason is the volume occupied by the same mass of ice with water is more than the volume occupied by water. Ice has more empty space within it.
Due to this reason, ice floats on water.
When 1000ml of water freezes to ice then its volume is greater than water.
Among the given options the correct answer is 1040 mL .
Heat is most closely related to which kind of energy?
O nuclear
electrical
thermal
chemical
Answer:
C thermal
Explanation:
define all the physical features of earth
MOUNTAINS
Mountains are large, tall, and elevated land areas on the earth's surface. They have steep, sloping sides and sharp or rounded ridges, and a high point, called a peak.
PLAINS
Plains are one of the major landforms on earth. They are areas of flat lands.
PLATEAUS
A plateau is a flat, elevated landform that rises above the surrounding area.
DESERTS
Regions of dry, arid lands.
DELTAS
A river delta is a landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water.
A UV wave has a smaller___
than visible light.
Answer:
wavelength
Explanation:
Why Should a magnesium ribbon be cleaned before burning ?
A magnesium ribbon is cleaned to remove the protective layer of basic magnesium carbonate from its surface, so that it may readily combine with the oxygen in air (on heating).
Answer:
Magnesium gets covered with a layer of magnesium oxide when kept in air for a long time. This layer hinders the burning of magnesium. Hence, it is to be cleaned before burning.
Which of the following contains the greatest mass of oxygen?
A
1 mole of oxygen gas, 02
B
1.8 mole of oxygen atoms
C
30 g of oxygen gas
D
3.01 x 1024 atoms of oxygen
Answer:
letter d
Explanation:
hope it's help you
Which of the following could be classified as a molecular element?
Question 1 options:
krypton
lithium
nitrogen
calcium
All four are classified as molecular elements.
Answer:
calcium is the correct answer to the question
i need to know the answer ASAP PLEASE
Answer:
E....H+
Explanation:
coz when hydrogen ions are formed they automatically join to form hydrogen
Which would most likely be reduced when combined with Cu(s)?
A. Hg
B. Mg2+
C. Au+
D. Zn2+
Answer:
mg2+ because it is a very good idea
Name the following structure:
HOCH2CH2CH2OH
Answer:
I'm pretty sure this is propanediol
Explanation:
I'm not sure how to explain it, but I believe this is the structure for propanediol. Please let me know if I misunderstood and don't hesitate to reach out with questions!
1,3-propan-diol is the chemical name the given structure: [tex]HOCH_2CH_2CH_2OH[/tex].
Chemical names are orderly systems for classifying and identifying various chemical compounds. They act as a benchmark for international scientific and research communication. For the development of many scientific domains, a standardised nomenclature system for chemicals must be created and adopted. Chemical names, which are made up of a combination of words and symbols, include detailed information on the make-up and structure of a certain substance. They frequently contain constituents, functional groups, and distinct modifiers that aid in describing the compound's varied attributes. 1,3-propan-diol is the chemical name the given structure: [tex]HOCH_2CH_2CH_2OH[/tex].
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Help ASAP only right answers only no spam don’t answer if you don’t know
Answer:
theory
Explanation:
if you assume something that you didn't see occuring it is called a theory
can someone help me?
Answer:
1: because phosphate contain oxide ions so that is base character
Why does every chemical reaction require a certain amount of activation energy?
Explanation:
Activation energy is the minimum amount of energy required for a chemical reaction to take place.
When a chemical reaction occurs then bonds between the reactants break and bonds between the products are formed. This leads to the formation of an activated complex which is also known as transition state.
So, in order to form the activated complex a minimum amount of energy is necessary and this energy is known as activation energy.
If an equilibrium system contains gaseous reactants and/or products, a change in volume will cause a change in concentration and pressure. A decrease in volume will cause the system to shift in the direction that produces _____ moles of gas in total, whereas an increase in volume causes a shift in the direction that produces _____ moles of gas in total.
Answer:
Less
More
Explanation:
When a constraint is imposed on a reaction system in equilibrium, the equilibrium position will shift in such a way as to annul the constraint.
When the volume of a reaction system in equilibrium is decreased, the equilibrium position will shift in the direction having less total number of moles.
Similarly, when the volume is increased, the equilibrium position shifts to the direction having a greater total number of moles.
An enclosed vessel contains 2.5g of 9b nitrogen and 13.3g of chlorine at s.T.P. Of What will be the partial pressure of the Il nitrogen if the temperature is raised to b 180C
Answer:
0.535 atm
Explanation:
Since the volume of the tank is constant, we use Gay- Lussac's law to find the pressure at 180°C.
So, P₁/T₁ = P₂/T₂ where P₁ = pressure at S.T.P = 1 atm, T₁ = temperature at S.T.P = 273.15 K, P₂ = pressure of gas at 180 °C and T₂ = 180 °C = 273.15 + 180 K = 453.15 K
So, P₁/T₁ = P₂/T₂
P₂ = P₁T₂/T₁
Substituting the values of the variables into the equation, we have
P₂ = P₁T₂/T₁
P₂ = 1 atm × 453.15 K/273.15 K
P₂ = 1 atm × 1.66
P₂ = 1.66 atm
We now need to find the total number of moles of each gas present
number of moles of nitrogen = mass of nitrogen, m/molar mass of nitrogen molecule M
n = m/M
m = 2.5 g and M = 2 × atomic mass of nitrogen (since it is diatomic) = 2 × 14 g/mol = 28 g/mol
So, n = 2.5 g/28 g/mol
n = 0.089 mol
number of moles of chlorine, n' = mass of chlorine, m'/molar mass of chlorine molecule M'
n' = m'/M'
m' = 13.3 g and M = 2 × atomic mass of chlorine (since it is diatomic) = 2 × 35.5 g/mol = 71 g/mol
So, n' = 13.3 g/71 g/mol
n' = 0.187 mol
So, the total number of moles of gas present is n" = n + n' = 0.089 mol + 0.187 mol = 0.276 mol
So, the partial pressure due to nitrogen gas, P = mole fraction of nitrogen × pressure of gas at 180 °C
P = n/n" × P₂
P = 0.089 mol/0.276 mol × 1.66 atm
P = 0.322 × 1.66 atm
P = 0.535 atm