Answer:
Physical :)
Explanation:
Skin works as a shield to the outside elements and does a good job of keeping the bad stuff out. :)
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Which of the following occurs when sodium and chlorine bond together to form sodium
A chlorine atom gains an electron from a sodium atom
A chlorine atom gains a proton from a sodium atom.
A chlorine atom donates a proton to a sodium atom.
A chlorine atom donates an electron to a sodium atom.
what is emission spectrum and absorption spectrum?
Answer:
When matter interact with EMR then spectrum is obtained. We can understand both spectra using Bohr's hydrogen spectrum. let's have a look on Bohr's hydrogen spectrum what does it say. It says when a electron gains energy it moves from one energy level to other(lower to higher) which is Absorption phenomenon. When the electrons returns from excited state to ground state they emits several spectral lines. this spectrum is called as emission spectrum. inshort the
Emission spectrum is spectrum of electromagnetic radiations that were emitted from the higher energy state(Excited state) to lower energy state(Ground state). and study of emission spectrum is known as AES (Atomic Emission spectroscopy).
When an atom or ion is subjected to EMR, it absorbs certain level of radiations, and when this absorbed energies are studied under spectroscopy they are plotted as absorption spectrum, and study of Absorption spectrum is known as AAS (Atomic Absorption spectroscopy).
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Which substance is beneficial to the aquatic life?
Dissolved Oxygen
Phosphates
Sewage
Plastic
In the chemical formula h2o, which description explains what the 2 represents?.
H_2O is the chemical formula of compound water.
Here
2 denotes to no of hydrogen atoms as it's after HIn water
There are
2Hydrogen atoms1 Oxygen atoms A lone pair is present over Oxygen atomThe body is made up of systems that work together so that an organism can survive and grow. The musculoskeletal system contains muscles that move the body. How does the circulatory system help the muscles to function?
A. by transporting carbon dioxide that can be used by the muscles to produce energy
B. by transporting oxygen that can be used by the muscles to produce energy
C. by transporting carbon dioxide that can be used by the muscles for sensing information
D. by transporting oxygen that can be used by the muscles for sensing information
The circulatory system help the muscles to function by transporting oxygen that can be used by the muscles to produce energy.
What is Circulatory system?
This is the system which is involved in the transportation of nutrients, respiratory gases etc in a living organism.
The heart is the central organ which ensures oxygen is distributed to all parts of the cells for production of energy.
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Is Iron rusting a physical, or chemical change?
Answer:
the answer is chemical change because the act of rusting changes the substance of iron
Explanation:
What atom is the site of covalent attachment of amc to the model tetrapeptide used in the studies?.
The experiment referenced here involves the use of Y32P-ATP. The atom involved in the site of the covalent attachment is the N atom in Aminomethylcyclohexane (AMC).
The explanation in relation to the attachment of AMC to the Moel Tetrapeptide
Given that Aminomethylcyclohexane (AMC) had been linked around the carboxyl side, it, therefore, means that that type of linkage called the Amide-Linkage (That is N-acylation) can be utilized in the covalent bonding of the fluorophore into the peptide
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Can anyone help me please
Answer:
Nucleic acids
Explanation:
all organic foods (fruit, meat, etc) contain it to some degree. because all organic foods have dna in them.
At constant temperature, a sample of helium at 760. Torr in a closed container was compressed from 5. 00 l to 3. 00 l. What was the new pressure exerted by the helium on its container?.
P₁V₁=P₂V₂
760.5=P₂.3
P₂=1266.6 torr
calculate the oxidation state of the underlined elements of K2 Cr2 O7
-----
Answer:
+4
Explanation:
In PbO2, oxygen exhibits an oxidation number of -2 (since it's not a peroxide or superoxide):
Let the oxidation number of Pb be x. Then, for the compound to be neutral, the oxidation numbers of all atoms should add up to zero.
⇒ x + (−2) + (−2) = 0
x = +4
So the oxidation no. of Pb is +4.
I hope this helps.
Explain why you usually can’t use just a single spectral line to confirm the identity of an element.
You can't usually just use a single spectrum line to confirm the identity of an element because there are cases that the emission line id not clearly defined. When the emission line is very weak compared to surrounding noise, in which case the more datapoints you have to build up confidence for the existence of a particular emission spectra, the better.
How may PARTICLES of oxygen ore requried to make 6.7 moles of Carbon Dioxide
Answer:
0.15 moles
Explanation:
6.7moles x 1 mole co2 over 44.01 g = 0.15 moles
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current experiment; cabbage water vinegar, and baking soda ; (to see pH levels)
Name 1 new related experiments that could be done next to further research
Explain why these experiments would be the ones to do next.
Answer:
Soap and tomato juice :)
Explanation:
Using different types of pH levels may affect the results, so that is why I think this would be a good experiment to do. :)
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Answer:
Using litmus paper
Explanation:
If an acid is applied, the paper will turn red [pH range : 0 < x < 7]If it's a neutral substance, the paper will not change color [like water] (pH = 7)If a base is applied, the paper will turn blue [pH range : 7 < x ≤ 14]What amount of alcohol consumed while boating is equivalent to the amount on land.
Answer:
yes it is
Explanation:
while boating or on the land it is the same amount of alcohol
Answer:
Any amount will be have the same effect on Blood Alcohol Content while boating OR on land .
Explanation:
I dont understand. Please help me.
Answer:
B
Explanation:
it's has more water and will go active way faster
Answer:
Beaker b
Explanation:
This is because the temperature in beaker b is higher. Hot water has more kinetic energy. Therefore, it's particles move faster and collide more frequently with the particles of antacid tablet. So, the reaction occurs faster.
Hope this helps =)
The exploration of the mid-cayman rise is intended to discover _______. a. what life may have been like before the evolution of photosynthesis b. the origins of photosynthesis c. life in shallow, coastal regions d. the chemical composition of undersea mountains
The exploration of the mid-cayman rise is intended to discover that what life may have been like before the evolution of photosynthesis.
What is mid - cayman rise?Mid - cayman rise is an area or era where only some amount of light is coming but still existence of life is present there.
As we know that plants make their own food by the process called photosynthesis in the presence of light, but this is not the scenario for all the time. Before the discovery of photosynthesis plants also prepared their own food.
Hence, option (a) is correct.
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Answer:
A
Explanation:
If a gas has a volume of 1.25 l at a temperature of 300 k, what will the volume change to if the container is cooled to 200k
The volume of the gas when the container is cooled from a temperature of 300 K to 200 K is 0.83 L
Charles' law
Charles' law states as follow:
V₁ / T₁ = V₂ / T₂
Where
V₁ is the initial volume T₁ is the initial temperature V₂ is the new volume T₂ is the new temperature How to determine the new volumeFrom the question given above, the following data were obtained
Initial volume (V₁) = 1.25 LInitial temperature (T₁) = 300 KNew temperature (T₂) = 200 KNew Volume (V₂) =?V₁ / T₁ = V₂ / T₂
1.25 / 300 = V₂ / 200
Cross multiply
300 × V₂ = 1.25 × 200
Divide both side by 300
V₂ = (1.25 × 200) / 300
V₂ = 0.83 L
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The balanced equation for the aerobic reaction is:
Zn + 2 HCl → ZnCl2 + H2
How much hydrogen gas is produced from 5 g of HCl?
Please show work and be detailed.
Answer:
1.85 g of hydrogen gas will form!
Explanation:
1. Write the balanced equation.
Zn
+
2HCl
→
ZnCl
2
+
H
2
2. Calculate the moles of
Zn
.
Moles of Zn
=
30.0
g Zn
×
1 mol Zn
65.38
g Zn
=
0.4589 mol Zn
3. Calculate the moles of
H
2
.
Moles of H
2
=
0.4589
mol Zn
×
2 mol H
2
1
mol Zn
=
0.9177 mol H
2
4. Calculate the mass of
H
2
.
Mass of H
2
=
0.9177
mol H
2
×
2.016 g H
2
1
mol H
2
=
1.85 g H
2
(40) If a hypothesis is proven correct, a theory is formulated.
True or false
Answer: False, I believe.
Explanation: If a Hypothesis is proven correct, then another experiment to strengthen that Hypothesis is should be done.
name the follwing compound, KBr
Answer:
Potassium bromide
Explanation:
Which type of carbon fixation stores carbon dioxide in acid form? a. c3 b. c4 c. cam d. all of the above
The type of carbon fixation stores carbon dioxide in acid form is CAM i.e. crassulacean acid metabolism.
What are CAM?CAM stands for crassulacean acid metabolism in this process photosynsthesis is occured at day time but the exchange of gases takes place at night itself only.
In this carbon fixation process, carbon dioxide is stored in the form of organic acid malic acid and losses carbon dioxide at the night time and by doing this it helps in the storage of water.
Hence option (C) is correct.
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Answer:
CAM
Explanation:
Yes the correct answer is option C, ( CAM) I just took the test.
what are the products for the following equation?
ZnBr2 + F2 ->
Answer:
The products to ZnBr2 + F2 -> Znf + Br2
When we balance this equation we get the following:
2ZnBr2 + F2 -> 2Znf + 2Br2
Hope this helps !!!
the number of cobalt atoms in 4.23 moles of cobalt
Answer:
[tex]2.55 \times {10}^{24} [/tex]
atoms
Differences in the density of seawater cause it to move. True or false?
True
False
Answer:
True
Explanation:
Differences in water density affect vertical ocean currents (movement of surface ocean water to the bottom of the ocean and movement of deep ocean water to the surface). … Denser water tends to sink, while less dense water tends to rise.
Differences in the density of seawater cause it to move. Therefore, the given statement is true.
What is density?The substance's mass per unit of volume is known as its density (volumetric mass density or specific mass). Although the Roman letter D may also be used, the sign most frequently used for density is (the lower case Greek letter rho). Density is calculated mathematically by dividing mass by volume.
Where m represents the mass, V is the volume, and is the density. Density is sometimes roughly characterized as weight every unit volume, while this is incorrect technically; this quantity is much more precisely known as specific weight. One example of this is in the US oil and gas business. Differences in the density of seawater cause it to move.
Therefore, the given statement is true.
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Which best describes the forces in the nucleus of a stable atom?
O A. The weak nuclear force is greater than the electrostatic force.
O B. The electrostatic force is greater than the strong nuclear force.
O c. The weak nuclear force balances out the strong nuclear force.
O D. The strong nuclèar force balances out the electrostatic force.
Best describes the forces in the nucleus of a stable atom is the strong nuclear force balances out the electrostatic force.
The center region of an atom, which is composed of two different types of particles, is known as the atomic nucleus. Protons with positive charges and neutrons with no charges are present. Because of the strong electrostatic attraction between positively charged protons, atomic nuclei should be unstable, however they occasionally remain stable for more than a billion years.
The stability of nuclei suggests that protons and neutrons are attracted to one another by an attractive force. The strong nuclear force, also known as the residual strong force, is responsible for every individual atomic nucleus' stability. Neutrons and protons are held together by this basic force of nature. It is used to explain the atom's and its nucleus' stability, which is otherwise puzzling. It can be used to explain the origin of all atoms and, consequently, the origin of all known simple and complex molecules.
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help asap i need help
Answer:
from producers to consumers
Explanation:
Energy is transferred between organisms in food webs from producers to consumers. The energy is used by organisms to carry out complex tasks. The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants
Short answer, don't know but i'm sure the answer is up here
what are the units on avogardo’s number
Answer:
I believe they are electrons, atoms, ions, or molecules.
Explanation:
Is apologize if it is incorrect-
I hope it helps! Have a great day!
Muffin~
Answer:
Units:
electrons
ions
atoms
molecules
Explanation:
I hope it helps!
Have a great day!
<3
formula of sodium chloride, sodium trioxocarbonate (IV), aluminum oxide, ammonium sulphide, zinc hydroxide, zinc tetraoxosulphate (IV), sodium tetraoxosulphate (VI), trioxonitrate (V) acid, water
Answer:
The correct answer is Na2CO3. 10H2O
Describe the three possible decisions you can receive from an
editor when you submit a scientific article for publication. Which
decision is the least likely to occur?
a
Your answer should consist of 3-4 complete sentences with
correct grammar/spelling/punctuation.
Answer 2. Accept with minor revisions: Also known as conditional acceptance, this decision means that the paper requires minor changes for it to be ...
wer:
Explanation:
What does net force depend on
Answer:
net force depends upon the object and also the mass of that object
Answer:The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.
Explanation: