"lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air)
Can someone help me please
Answer:
13) Carbon Dioxide and water
Explanation:
The fact is that during photosynthesis, Carbon Dioxide is needed by green plants to manufacture their food and water is also needed but also chloroplast which contained chlorophyll is also needed
hence, the options are somehow confusing
14) perhaps it should be all of the above
What would be the freezing point of a solution that has a molality of 1.324 m which was prepared by dissolving biphenyl (C12H10) into naphthalene
The freezing point of a 1.324 m solution, prepared by dissolving biphenyl into naphthalene, is 71.12 ° C.
A solution is prepared by dissolving biphenyl into naphthalene. We can calculate the freezing point depression (ΔT) for naphthalene using the following expression.
[tex]\Delta T = i \times Kf \times m = 1 \times 6.90 \°C/m \times 1.324m = 9.14 \°C[/tex]
where,
i: van 't Hoff factor (1 for non-electrolytes)Kf: cryoscopic constantm: molalityThe normal freezing point of naphthalene is 80.26 °C. The freezing point of the solution is:
[tex]T = 80.26 \° C - 9.14 \° C = 71.12 \° C[/tex]
The freezing point of a 1.324 m solution, prepared by dissolving biphenyl into naphthalene, is 71.12 ° C.
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Please Help (80 Points)
Describe two conditions needed for a molecule to be polar
Answer:
1. The molecule must possess polar covalent bonds in its structure
2. The molecule must have a NET DIPOLE moment
Explanation:
Polar molecules occur when two atoms do not share electrons equally in a covalent bond. A dipole forms, with part of the molecule carrying a slight positive charge and the other part carrying a slight negative charge. This happens when there is a difference between the electronegativity values of each atom.
Polar molecules have an asymmetrical form and polar covalent connections due to atoms' different electronegativities, resulting in an unequal electron density distribution and a net dipole moment.
To determine the polarity of a molecule, two conditions need to be satisfied:
The molecule must have an asymmetrical shape, and its electron density must be irregular. When the atoms that make up the molecule have different electronegativities, the electrons are drawn to one atom in the molecule more than they are drawn to another. Because of this excess electron density, one side of the molecule will become slightly negative (-), while the other side will become slightly positive (+).
Polar Bonds: In order for the molecule to function properly, it must contain polar covalent bonds. When two atoms with differing electronegativities share electrons in an unequal manner, a polar covalent bond is formed. This results in one atom having a partial positive charge and the other atom having a partial negative charge. When a molecule has multiple polar covalent connections and an asymmetrical shape, the dipole moment of the molecule is said to be polar.
Polarity can be attributed to the asymmetrical bent shape of water (H2O) as well as the covalent interactions between hydrogen and oxygen. Due to the fact that oxygen has a greater electronegative potential than hydrogen, electrons are drawn towards oxygen, which results in oxygen atoms having a partial negative charge whereas hydrogen atoms have a partial positive charge.
Because of the varying electronegativity of the atoms, a polar molecule needs to have an asymmetrical structure and polar covalent bonds in order to exist. As a result of these conditions, polar molecules possess an uneven distribution of their electron density as well as a net dipole moment.
To know more about atoms
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How many CO2 molecules are in 1 mole of carbon dioxide?
Answer:
I guess 1-mole carbon dioxide contains 6.02 x 10^23 molecules.
How many atoms of potassium make up one mole?
https://tex.z-dn.net/?f=%5Csqrt%7Bx%7D%20%5Cneq%20%5Cneq%20%20%5Clim_%7Bn%20%5Cto%20%5Cinfty%7D%20a_n%20%5Cint%5Climits%5Ea_b%20%7Bx%7D%20%5C%2C%20dx%20x%5E%7B2%7D%20%5C%5C%20%5C%5C%20%5Cleq%20%5C%5C%0
Answer:
6.022×1023
Explanation:
There are 6.022 × 1023 atoms of potassium in every mole of potassium. Since one mole of KOH contains one mole of K, the answer is 6.022×1023 atoms of K.
which event demonstrates electromagnetic waves transferring energy?
A: An explosion causing a window to break
B: An astronaut tapping two rocks together
C: A person diving in a swimming pool
D: sun heating car sitting in a parking lot
real answers please
(not chemistry but science so)
I admit that I'm unsure, but I believe the answer is D: Sun heating car sitting in a parking lot. It makes sense to me, but I'm blonde. I hope it is correct. I also have that question in my quiz.
how many nitrogen atoms should appear on the right side of this equation 2AgNO3+Cu=?
Answer:
One.
Explanation:
Both sides of the equation need 2 Silver atoms, 1 Nitrogen, 3 Oxygen and 1 Copper to be balanced which is the same as the side of reactants.
Can some help me please
Part B
Decide which molecules in the simulation will represent the substances from the actual reaction. Include a strategy to deal with the difference in structure between the actual reaction N2 + 3H2 ⇌ 2NH3 and the simulated reaction. Not all molecules need to be used.
Simulation of a reaction is a chemical reaction modeling or demonstration tool, using various software to better understand the molecular structure and the physical and chemical properties of the molecule. Here the actual reaction is N2 + 3H2 -----> 2NH3. In the simulation reactions, the nitrogen and hydrogen molecules in the actual reaction are described by different colored circles or dots and the bonds are produced using a single, double or triple line that touches each molecule and gives an appearance like the reactants and the products' ball and stick model. Example: Molecule of nitrogen as o---triple line---o. A molecule of hydrogen as O———O. Chemical symbols such as N and H are expressed in Actual Chemical Reaction, N2 and H2 and the bonds are represented by single, double or triple lines that do not impact the atoms in the molecule as follows: Nitrogen Molecule: N -triple Bond- N. Hydrogen Molecule: H - H. Hope it helps ya
In the simulation reactions, the nitrogen and hydrogen molecules in the actual chemical equation are described by different colored circles or dots and the bonds are produced using a single, double or triple line that touches each molecule.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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Consider a galvanic cell with a beaker of sulfuric acid and a beaker of nitric acid. The sulfuric acid beaker contains a strip of tin, and the nitric acid cell contains a strip of platinum. A wire runs between the strips. The reaction that occurs is as follows:
3Sn(s) + 2NO3–(aq) + 8H+(aq) → 3Sn2+(aq) + 2NO(g) + 4H2O(l)
In three to five sentences, list which electrode is the anode and which is the cathode and the half reactions that occur at each electrode.
I wrote, The platinum electrode is the cathode in this reaction. The tin electrode is the anode in this reaction. In the half reactions that occur the nitrate is reduced to nitric oxide(NO) while the tin electrode is oxidized to Sn2+.
Oxidation occurs at the tin half cell(anode) while reduction occurs at the nitrate half cell(cathode).
A galvanic cell refers to a cell that produces electrical energy spontaneously by redox reaction. Oxidation occurs at the anode while reduction occurs at the cathode in a galvanic cell.
The oxidation half equation at the anode occurs as follows;
3Sn(s) → 3Sn^2+(aq) + 6e
The reduction half equation that occurs at the cathode is;
2NO3–(aq) + 8H+(aq) + 6e→ 2NO(g) + 4H2O(l)
We can see that electron loss occurs at the cathode while electron gain occurs at the anode as we can see in the equations above.
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Balancing Chemical Equation
C=H2=CH4
Answer:
C + 2H2 ⇒ CH4
Explanation:
In order to balance a chemical equation you need to make sure that the number of atoms on both sides are equal
C + H2 = CH4
C = 1
H = 2
Products:
C = 1
H = 4
H2 = 2 × 2 = 4
C + 2H2 ⇒ CH4
Hope this helps.
What part of an investigation is only found in an experimental investigation
Answer:
control group
Explanation:
Answer:
control book
Explanation:
I found it online and it's very helpful
what are ionic bonds???
ionic bonds is a type of bond that is ionic I will personally explain
Answer: A type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound
Explanation: ;) ur welcome
I am a gas with a mass number of 19.
Answer:
Element Fluorine
Explanation:
The chemical element fluorine is a gas that has a mass number of 19.
The gas with a mass number of 19 is potassium-39 (K-39).
Potassium-39 is an isotope of potassium, which is an alkali metal element found in Group 1 of the periodic table. The atomic number of potassium is 19, indicating the number of protons in its nucleus, while the mass number represents the total number of protons and neutrons in the atom.
Potassium-39 is the most abundant naturally occurring isotope of potassium, accounting for about 93% of its isotopic composition. It is stable and non-radioactive. Potassium as a whole is an essential element for many biological processes and is found in various foods. It plays a crucial role in nerve function, muscle contraction, and maintaining electrolyte balance in the body.
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2. phosphorus
How many valance electrons are in phosphorus
Answer:
5 valance electrons
Explanation:
Phosphorus has 5 valance electrons because it is in the group 15. Phosphorus has 3 rings, 2, 8, and 5. The third ring is not full which means those are the valance electrons.
___AsCl3+____H2S-->___As2S3+___HCI
Answer:
2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl
Explanation:
When we balance a chemical equation, what we are trying to do is to achieve the same number of atoms for each element on both sides of the arrow. On the right of the arrow is where we can find the products, while the reactants are found on the left of the arrow.
We usually balance O and H atoms last.
AsCl₃ + H₂S → As₂S₃ +HCl
reactants
As --- 1
Cl --- 3
H --- 2
S --- 1
products
As --- 2
Cl --- 1
H --- 1
S --- 3
2 AsCl₃ + H₂S → As₂S₃ +HCl
reactants
As --- 2
Cl --- 6
H --- 2
S --- 1
products
As --- 2
Cl --- 1
H --- 1
S --- 3
The number of As atoms is now balanced.
2 AsCl₃ + 3 H₂S → As₂S₃ +HCl
reactants
As --- 2
Cl --- 6
H --- 6
S --- 3
products
As --- 2
Cl --- 1
H --- 1
S --- 3
The number of S atoms is now equal on both sides.
2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl
reactants
As --- 2
Cl --- 6
H --- 6
S --- 3
products
As --- 2
Cl --- 6
H --- 6
S --- 3
The equation is now balanced.
how many hydrophobic tails does a triacyl glycerol molecule have?
how to find the molar mass of two elements when given the molecular weight of the compound and the percent composition
Answer: To do this, you must divide the mass of each element by its molar mass. Use the periodic table to find the molar mass of each element. Calculate the number of moles of each component element in the compound. A compound is 2.00% H by mass, 32.7% S by mass, and 65.3% O by mass.
Explanation:
What is the science behind procrastination? Most descriptive and accurate answer will receive brainliest.
Answer:
Explanation:
Procrastination is a plague to which we are all susceptible. Essentially, procrastination is the avoidance of work or necessary tasks by focusing on more satisfying activities. It’s easy to chalk procrastination up to a lack of self-motivation, lazy habits or incompetence. But in reality, procrastination is chemical; there’s a science to why we prefer relaxing activities to the required.
Procrastination boils down to a battle between the limbic system and the prefrontal cortex. The limbic system is a set of brain structures containing the pleasure center, while the prefrontal cortex controls planning and decision making. The prefrontal cortex is less developed and thus weaker, so often times the limbic system wins out, leading to procrastination.
Which statement is true about electronegativity?
A. Electronegativity generally decreases from left to right across a period.
B. Electronegativity is the ability of an anion to attract another anion.
C. Electronegativity generally is higher for metals than for nonmetals.
D. Electronegativity generally increases as you go from bottom to top in a group.
Answer:
electronegativity generally increase as you go from bottom to top group
Which element has 2 energy shells and 2 valence electrons
Helium
Helium has 2 electrons both in the first shell (so two valence electrons).
Hope this helps :)
What useful functions do oxidation numbers serve?
Explanation:
Oxidation Numbers. It is often useful to follow chemical reactions by looking at changes in the oxidation numbers of the atoms in each compound during the reaction. Oxidation numbers also play an important role in the systematic nomenclature of chemical compounds.
brainliest please
To what temperature must an ideal gas at 27°C be cool to reduce its volume by 1/3
Why are x-rays and the radiation emitted by radioisotopes called ionizing radiation?
Answer:
The radiation has enough energy to knock electrons off some atoms of a bombarded substance producing ions.
Explanation:
1. ____ is the measure of the pull of gravity on an object.
2. ____ is the force of attraction between all objects.
3. The forces of gravity depends on the ___ of the objects & how ___ apart they are.
4. ____ can change because the pull of gravity is not the same everywhere.
5. The ____ of and object always remains the same, regardless of the ____
1. weight
2. gravity
3. mass, far(distance)
4. weight
5. mass, ?
moles in 5.92 x 10^24 atoms P
Answer:
9.83039 moles i think this is the answer
describe las moléculas
Answer:
A little portion of a substance that has all of the substance's physical and chemical properties. If a molecule has more than one atom, the atoms might be identical (a molecule of oxygen contains two atoms of oxygen) or distinct (a molecule of water contains two atoms of hydrogen and one atom of oxygen).
Explanation:
https://www.liveworksheets.com/fu1187118lo
Can anyone please solve it and give me the answer.
Answer:
If your students do an exercise and choose the option "send my answers to the teacher", you can check their answers in your mail box. If the students log in with their username and password and do the exercises in their workbooks, you can check their work in your notifications.
Explanation:
may it helpful for you
Occurs because of pressure differences around the equator.
Answer:
Pressure Differences occur as result of heating differences
Explanation:
Pressure differences usually occur as a result of heating differences ... most heat is contained near the equator, where most of the heating occurs
What form of energy does the swinging pendulum represent?
Mechanical energy
Radiant energy
Chemical energy
Electrical energy
----------------------------------------------------------------------
At which position is the potential energy of the pendulum the greatest?
Position C
Position A
Position B
Position D
Answer:
The answer for the first question is Mechanical energy and the second one is position A.
