How is a strand of DNA like a sentence?
Answer:
DNA molecules are composed of four nucleotides, and these nucleotides are linked together much like the words in a sentence. Together, all of the DNA "sentences" within a cell contain the instructions for building the proteins and other molecules that the cell needs to carry out its daily work.
Explanation:
A strand of DNA is much like an extremely long sentence that uses only four letters. DNA actually has two strands, much like a zipper and the nucleotides are like the teeth of that zipper. This two-strand system is the key to how DNA is able to make copies of itself.
The average yearly temperatures and latitudes of four cities are shown in the table above. Which of the following is demonstrated by the cities in the table?
a As latitude decreases, average yearly temperature generally increases.
B.
Climate is only influenced by latitude in the Southern Hemisphere.
C.
As latitude decreases, average yearly temperature generally decreases.
D.
The climate of an area is never influenced by the region's latitude.
Answer:
.
C.
As latitude decreases, average yearly temperature generally
Answer:
Wanna
Explanation:
J. Oing a meet its going to be fun yzn-dggf-jcq
ILL GIVE YOU BRIANLIEST! PLEASE HELP: Every compound is a molecule, but every molecule is not a compound. Why is this? Give an example with your answer.
Answer:
A molecule can be made up of two atoms of the same kind:)
Explanation:
hope that helps:))
Answer:
Explanation:
A compound is a makeup of molecules.
Every organism is made up of an atom.Combined atoms can create a moleculeCombined molecules can create a compound.When you make a compound, you are combining molecules. But when you make a molecule, you are not combining compounds, you are combining atoms.
Examples:
Atoms:
[tex]\mathrm{H}[/tex] (hydrogen) and [tex]\mathrm{N}[/tex] (nitrogen)
Molecules:
[tex]\mathrm{H_2}[/tex] and [tex]\mathrm{N_2}[/tex]
Compounds:
[tex]\mathrm{H_2SO_2}[/tex] and [tex]\mathrm{NaCL}[/tex]
Take a look at the Compounds and Molecules section. The [tex]\mathrm{H_2}[/tex] in the example of a molecule is in one of the examples of the compounds, but the [tex]\mathrm{H_2SO_2}[/tex] (THE WHOLE THING) is not in the molecule. This shows how every compound is a molecule, but every molecule is not a compound.
Atoms lose or gain electrons to become like a _____________.
What is the wavelength of light in nm with energy of 6.95 x 10^-27 J?
Answer: 27 Hope it helps u
Determine the atomic number, mass number, and number of neutrons in
Answer:
mass number = protons + neutrons i guess
What are 2 possible options for treating cancer
Answer:
The most common treatments are surgery, chemotherapy, and radiation.
Explanation:
Answer:
The most common treatments are surgery, chemotherapy, and radiation.
Other options include targeted therapy, immunotherapy, laser, hormonal therapy, and others
30 POINTS!!! ANSWER ASAP!!!!!!!!!!!!!
Energy cannot be created or destroyed; it can however be converted from one form to another. How does God use our spirituality and faithfulness the same way?
HELP!
Answer:
First, the simple part: light exhibits dual nature. It exists as both particles and wave. So light can be considered as “particles” but not molecules.
Which of the following is a way humans use trees?
a. paper
b. food
C. wood
d. all of the above
Please select the best answer from the choices provided
because all students really need to have so may papers
hope it helpsAnswer:
All of the above.Reason:paper we get from trees in which we write even many knowledge and valuable things are written in paper which is of tree only.
food is necessary for human being to live stain live. it is because of food only.
wood is needed during the winter to keep ourselves warm it is also needed in cooking food at many villages and towns. and the main thing coal by which we get electricity is also made from wood only.
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True or False: Matter includes elements OR molecules. NOT BOTH *
True
False
Answer:
false
Explanation:
matter is anything that has mass and takes up space
this includes subatomic particles,
atoms (whcih are made of subatomic particles)
elements (whcih consis of atoms)
molecules (which are made of atoms)
compounds (which are made of molecules)
mixtures (homogeneous and heterogeneous)
and even
black holes
cheemistry is the study of the composition, properties, structure and energetic reactions of matter
A pasageway of food from mouth to the stomach
Explanation:
It is called the : Esophagus
Bent molecules do not have lone pair on the central atom.
True or False
FALSE. Bent molecules do not have lone pair on the central atom.
What is bent molecules?Bent molecules is a kind of molecular geometry in which the central atom has two lone pairs of electrons and is associated with two bond pairs.
The molecular structure is also known as angular or V-shaped.
Thus, the statement "bent molecules do not have lone pair on the central atom" is FALSE.
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What is a water system? Explain.
Examples of water systems in USA.
Answer: Its a type of "network." A water supply network or water supply system is a system of engineered hydrologic and hydraulic components that provide water supply.
Explanation: Schools, factories, office buildings, and hospitals which have their own water systems. Transient Non-Community Water System (TNCWS): A public water system that provides water in a place such as a gas station or campground where people do not remain for long periods of time
Are there elements with the same atomic number
Explanation:
No because each has specific atomic number and atomic mass
a. Identify the steps of the scientific method?
b. 1. What was the scientific question for this experiment?
b. 2. what hypothesis did the scientist form from the question?
b. 3. What prediction could be used to test the hypothesis?
b. 4. What did the control group consist of?
b. 5. How were the data presented?
b. 6. Was the hypothesis supported or rejected by the data? Explain your answer.
b. 7. Name on possible source of error or bias in this expirement?.
b. 8. How did the fact that the article was not peer reviewed affect the scientist?
Answer:
1. The steps of the scientific method consist of seven things: Ask a question, get the research needed for a experiment, (What are you trying to find out? What materials do I need to complete the experiment? What are the procedures needed to complete the experiment?) create a hypothesis, (your educated guess on what you think the results of the experiment will be) conduct a experiment (complete multiple different trials preferably three) to test your hypothesis, make observations and record data during the experiment, draw a conclusion, (Was your hypothesis correct? Yes or no and explain why it is wrong or right) present your findings.
2. A hypothesis is a educated guess that the scientist believe will be the answer at the end of the experiment which is why they conduct a experiment in the first place to find viable data that will support their hypothesis.
3. Predictions consist of theories that will test the hypothesis (educated guess) because they're the reasoning to why you believe your guess is correct.
4. A control group consists of variables that do not go through change during a experiment, things that remain the same.
5. Data can be presented in many different ways in the form of graphs, charts, or a research paper. You find the data by completing multiple different trials in a experiment, to make sure you have valid results to write down in your data research.
6. Remember that your hypothesis is your educated guess at the beginning of the experiment, what YOU thought was going to happen during the experiment and if the data you received during the experiment supports your hypothesis.
7. Your procedures, perhaps you measured a variable wrong, perhaps you used to much, or to little of a variable, all depends on your experiment.
8. Having people review and test your data by conducting their own experiments will not only make sure that your data is valid but it insures you even more of your conclusion, making it more accepted by other scientists.
Hope this helps.
2. Rust forming on a piece of iron is an example of which of the following:
A. A physical change because the process can be reversed
B.
A chemical change because oxygen atoms from the atmosphere bonded with the iron atoms
C.
A violation of the laws of physics because new mass has been created
Answer:
B.
Explanation:
Rust is a chemical change because you can not undo it. Rusting of iron is a chemical change because a new substance iron oxide is formed. The presence of oxygen and water or water vapour is essential for rusting.
Properties of a gas are..
-no definite shape or volume
-has definite shape, does NOT
-have definite volume
-has definite volume AND shape
-none of the above
ASAP need help
the answer would be none of the above.
Bismuth (Bi) , What is the correct number of valence electrons
Explanation:
there are five valence electrons in Bismuth
I need this asap please help
Answer:
A
Explanation:
A, because the chemical causes a varies of heat waves that warms your hand but it also create good light to see in the dark
A 100. mL reactor vessel is charged with 250. mg of P 4 and 4.21 atm of C l 2 at 298 K. The reaction goes to completion. How many moles of chlorine gas are initially in the vessel
There are 0.0172 moles of chlorine gas initially in the vessel.
Suppose we take a look and consider the reaction between P4 and Cl2, the balanced chemical equation between them can be expressed as:
[tex]\mathbf{P_4 + 6 Cl _2 \to 4 PCl_3}[/tex]
Given that:
mass of P₄ = 250 mg = 0.25gpressure of Cl₂ = 4.21 atmvolume of the reactor = 100 mL = 0.1 Ltemperature = 298 KUsing the Ideal gas equation, the number of moles of chlorine gas that were initially present in the vessel is:
PV = nRT
Making (n) the subject of the formula:
[tex]\mathbf{n = \dfrac{PV}{RT}}[/tex]
[tex]\mathbf{n = \dfrac{4.21 \ atm \times 0.1 \ L}{0.0821 \ atm.L/mol*K \times 298 \ K}}[/tex]
n = 0.0172 moles
Therefore, we can conclude that there are 0.0172 moles of chlorine gas initially in the vessel.
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. Dãy oxide nào sau đây tác dụng được với hydrochloric acid?
Answer:
ALL
Explanation:
The measured dipole moment of a polar covalent compound is 1.11 D with a percent ionic character of 18.2%. What is the bond length of this compound
Answer:
80.2
Explanation:
we subtract 18.2 from the total percentage which is 100%
The measured dipole moment of a polar covalent compound is 1.11 D with a percent ionic character of 18.2%. Therefore, the bond length of this compound will be 1.270 angstrom.
What is dipole moment?
Dipole moment results due to the separation of charges in a compound. Dipole moment can occur between the two ions present in an ionic bond or between the atoms present in a covalent bond. Dipole moment occurs due to the differences in electronegativity of atoms. The larger the difference in electronegativity between ions, the larger the dipole moment of the compound.
The bond length of the compound can be calculated with the help of the formula:
Measured dipole moment = 1.11 D
Theoretical bond length = 4.8×bond length
Percentage ionic character = (μ₁ / μ₂) × 100
where, μ₁ = μ theoretical,
μ₂ = μ experimental
Putting the values in formula we get,
18.2 = (1.11/ 4.8 × bond length) × 100
Bond length = (1.11/ 4.8 × 18.2) × 100
Bond length = 111/ 87.36
Bond length = 1.270
Therefore, the bond length of the dipole is 1.270 angstrom.
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After 200 million years, only 1/16 of the original amount of a particular radioactive waste will remain. The half-life of this radioactive waste is how many million years
Answer:
50 millions years
Explanation:
1 to 1/2 to 1/4 to 1/8 to 1/16
It takes 4 half lives to get to 1/16 of the original amount
200 million/4 = 50 millions years
The half-life of the radioactive waste is 50 million years.
To calculate the half-life of the radioactive waste, we use the formula below.
Formula:R/R' = [tex]2^{n/a}[/tex]............... Equation 1Where:
R = Original amount of the radioactive wasteR' = Remaining amount of the radioactive waste after decayn = Total timea = Half-life of the radioactive waste.Assuming: The original amount of the radioactive waste is y
From the question,
Given:
R = yR' = y/16n = 200 million years.Substitute these values into equation 1
y/(y/16) = [tex]2^{200/a}[/tex]16 = [tex]2^{200/a}[/tex]Solve for a
[tex]2^{200/a}[/tex] = 2⁴Equating the base
200/a = 44a = 200a = 200/4a = 50 million years.Hence, The half-life of the radioactive waste is 50 million years.
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[tex] \huge\mathrm{Question}[/tex]
Can someone give me step by step Explanation for this question ?
That would be of great help ~
Thanks for Answering ~
From the stoichiometry of the reaction, the mass of AgNO3 required is 340 Kg.
Number of moles of I2 produced in the third step = 254 × 10^3 g/254 g/mol = 1000 molesIn the first step, 1 mole of AgNO3 produces 1 mole of AgIIn the second step, 2 moles of AgI produces 1 mole of FeI2
In the third step, 2 moles of FeI2 produces 2 moles of I2
Hence;In the third step;
1000 moles of I2 is produced by 1000 moles of FeI2
In the second step;2 moles of AgI produces 1 mole of FeI2
x moles of AgI produces 1000 moles of FeI2
x = 2 moles × 1000 moles/ 1 mole
x = 2000 moles
In the first step;2000 moles of AgI is produced by 2000 moles of AgNO3
Mass of AgNO3 required = 2000 moles of AgNO3 × 170 g/mol = 340 Kg
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Given the reaction: (NH4)2CO3 → NH3 + CO2 + H20
What is the minimum amount of ammonium carbonate, in grams, that reacts to produce 1.0 mole of
ammonia?
Answer:
This is a simple stoichiometry problem using the ideal gas law.
First, take the grams of ammonium carbonate and convert it to moles using its molar mass and dividing. 11.9 g/96.0932 g/mol= .12384 mol
Now use a molar conversion using the balanced equation,
1 mol (NH4)2CO3 ---> 4 mol gas formed (2 mol NH3 + 1 mol CO2 + 1 mol H2O) = .12384 x 4 = .49535 mol gas
PV=nRT
V=nRT/P= .49535mol (.08206 Lxatm/molxK) (296K)/ (1.03 atm)=11.682 L
Explanation:
Hope this helps
Can I get Braineist.
Stoichiometry is used to determine the mass and the moles of the reactants and the products. 48 gms of ammonium carbonate is required to produce 1 mole of ammonia.
What is the stoichiometry coefficient?Stoichiometry coefficients are the numbers before the molecules of the reactant or the product side of the reaction that presents the numerical quantity of the chemical species.
The balanced chemical reaction is given as:
(NH₄)2CO₃ → 2 NH₃ + CO₂ + H₂0
Hence, 2 moles of ammonia are produced from 1 mole of ammonium carbonate. So, 0.5 moles of ammonium carbonate will be needed to produce 1 mole of ammonia.
Mass of ammonium carbonate is calculated as:
Mass = moles × molar mass
= 0.5 mol × 96.09 g/mol
= 48 gm
Therefore, 48 gm of ammonium carbonate is required to produce 1 mole of ammonia.
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Which of the following are compounds? (Select all that apply.)
CO2
Cl2
Ne
NaCl
a concern with using genetically modified crops is
Answer: Genetically modified plants may harm organisms that were never indented to be harmed.
how long to thaw a 23 pound turkey in the refrigerator
Answer:
Like about 5-6 days in the fridge.
Explanation:
the middle of an atom is called?
Answer:
In the middle of every atom is the nucleus
Explanation:
The nucleus contains two types of subatomic particles, protons and neutrons.
Answer:
the middle of an atom is called nuclear which contains total number of protons and total number of neutron
How do you solve this ?
Answer:
you'd take 3.03 and divide it by a mole that x100? maybe?
