Answer:
2. Hydrogen Bonds
Explanation:
Since water is a polar covalent molecule, there is a slight negative and positive end. Due to this, the oxygen end of one water molecule gravitates towards the hydrogen molecules of another water molecule. This accounts for a bunch of weird properties of water, like why ice floats. It's also what makes water the "universal solvent," and gives all life on earth the ability to even exist.
The primary forces of attraction between water molecules in H₂O (I) are hydrogen bonds.
What kind of chemical bonding is present in water molecule?Hydrogen bonding is present in water molecule due to which it exhibits an excellent property of adhesion to itself and to other substances.The hydrogen bonding is a result of electrostatic forces of attraction which are generated by the difference in charge between slightly positive hydrogen ions and slightly negative other ions.
In case of water,hydrogen bonds are formed between neighboring hydrogen and oxygen atoms of the nearby water molecules.The attraction between water molecules itself results in a formation of a bond called as a hydrogen bond.
It is a type of covalent bond which is formed between hydrogen and oxygen atoms as one oxygen atom shares its two electrons with two hydrogen atoms .The positive charge of one hydrogen atom associates with negative charge of oxygen atom.These are weak interactions which are formed between a hydrogen atom each with a partial positive charge and an oxygen atom which is more electronegative than hydrogen.
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How many total number of hydrogen atoms present in CH4?
Answer:
4 Hydrogen atoms
Why does the rate of the reaction decrease over time? Why does the rate of the reaction decrease over time? Exothermic reactions lose heat which cools the reaction which decreases reaction rate. Not all molecules will react and some choose to stay in their present form. As the reaction proceeds, a decrease in the concentration of reactants results in fewer successful collisions. As the reaction proceeds, the concentration of the products results in fewer collisions. none of the above
Answer: The rate of the reaction decrease over time as the reaction proceeds, a decrease in the concentration of reactants results in fewer successful collisions.
Explanation:
Rate of a reaction is defined as the change in concentration of products and reactants with respect to time.
The rate of a reaction decreases with times because reactants are converting into products.
As a result, the reaction is proceeding with a decrease in the concentration of reactants due to which less number of collisions between the reactant molecules will be there.
Hence, rate of reaction will decrease.
Thus, we can conclude that the rate of the reaction decrease over time as the reaction proceeds, a decrease in the concentration of reactants results in fewer successful collisions.
You can find the speed on a distance-versus-time graph by finding the slope of the line.
True
False
NEED HELP ASAP THANKS
Answer:
its ionic
Explanation:
Jenny has a gold bar in a piece of gold foil both objects are made of 100% pure gold watch and closing can guinea make about the two objects
Answer:
What is the question your asking?
Explanation:
All atoms of the same element have the same properties.
TRUE or FALSE: We have 2 copies of each gene because we have 2 parents.
How much ammonia would it take to neutralize 5ml of apple cider and 5ml of white vinegar if the ammonia had a molarity of 0.25?
Answer:
[tex]m_{NH_3}=0.0213gNH_3[/tex]
Explanation:
Hello there!
In this case, since it is known that the reaction between ammonia and acetic acid is:
[tex]CH_3COOH+NH_3\rightarrow CH_3COONH_4[/tex]
It is possible for us to realize that the mole ratio of acetic acid (vinegar) to ammonia is 1:1, that is why we can relate the concentrations as follows:
[tex]M_{acid}V_{acid}=M_{base}V_{base}\\\\[/tex]
In such a way, by knowing that the volume of these two are the same, we infer that their concentrations is also de same; and therefore, the mass of ammonia is calculated as:
[tex]m_{NH_3}=0.005L*0.25\frac{molNH_3}{L}*\frac{17.04gNH_3}{1molNH_3}\\\\m_{NH_3}=0.0213gNH_3[/tex]
Regards!
intermolecular forces between particles are
Explanation:
Intermolecular forces hold multiple molecules together and determine many of a substance's properties. All of the attractive forces between neutral atoms and molecules are known as van der Waals forces, although they are usually referred to more informally as intermolecular attraction.
Intermolecular forces are the forces of attraction or repulsion which act between neighboring particles (atoms, molecules, or ions ). These forces are weak compared to the intramolecular forces, such as the covalent or ionic bonds between atoms in a molecule.
two differences between weather and climate
subject-science
Answer:
weather- rain, hail, snow, sunny, dry, etc.
climate- warm, cold, humid, dry, etc.
Explanation:
The difference if weather and climate is that climate is the way the temperature is, whether it's warm, cold, humid, dry. While weather is the state of the atmosphere at a place and time as regards heat, dryness, sunshine, wind, rain, etc.
If a balloon expands to occupy a volume of 5.25 Liters going from 15 atm to 25 atm, what was the initial volume?
03.15L
O 7.75L
Answer:
V₁ = 8.75L
Explanation:
P₁ × V₁ = P₂ × V₂
15atm × V₁ = 25atm × 5.25L
V₁ = 8.75L
What is a cell? ♀️
Answer:
Cell is defined as the smallest unit or basic unit of life.
the smallest part of a living thing that can carry out the activities needed for life. Basically the unit of all forms of life.
Explanation:
hope this helps in anyway :)
Andrea is making a poster to show how the nervous system uses signals to send information through the body. These signals are sent through nerves. What parts should Andrea include in her diagram of a nerve as evidence to support her explanation?
neurons only
neurons, axons, and dendrites
dendrites, blood vessels, and muscle cells
axons, blood vessels, and connective tissue
Answer:b
Explanation:
Which is/are used in nuclear reactors to absorb neutrons?
A. heavy nuclei
B. critical mass
C. chain reactions
D. control rods
Answer:
A. heavy nuclei
Explanation:
They absorb neuyrons in order to hain stability.
how does the study of genetics and Dna
help the study of evolution
What is one characteristic of a rain forest?
cold temperatures
different layers
minimal plants
dry climate
Which of the following contains the least amount (number) of molecules?
Group of answer choices
5.0 g O2
5.0 g H2O
5.0 g N2
5.0 g CO2
How does artificial selection change a population over time?
In this experiment, you will need to prepare 250.0 mL of 0.100 M KCl(aq) solution. Determine the mass in grams of potassium chloride required to prepare this solution. Type your numerical answer (no units) in the box below. Even though the number of significant figures is limited to three by the inputs, please report your answer to four significant figures.
Answer: The mass in grams of potassium chloride required to prepare this solution is 1.862 grams
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
where,
n = moles of solute
[tex]V_s[/tex] = volume of solution in ml
moles of [tex]KCl[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{74.5g/mol}[/tex]
Now put all the given values in the formula of molality, we get
[tex]0.100=\frac{x\times 1000}{74.5g/mol\times 250.0ml}[/tex]
[tex]x=1.862g[/tex]
Therefore, the mass in grams of potassium chloride required to prepare this solution is 1.862 grams
A catalyst is:
a chemical found in leaves
a chemical which promotes a chemical reaction
a chemical which reacts with sunlight
a cell with chlorophyll
Answer:
a chemical which promotes a chemical reaction
and sppeds up that reaction.
Definition: These are the layers of rock or soil that are distinguishable from other layers that have been
laid down upon one another over the history of the earth.
01)
Term: Type term here
Strata are the layers of rock or soil that are distinguishable from other layers that have been laid down upon one another over the history of the earth.
What is a Strata?A strata is the horizontal layer of rocks or sedimentary rocks that are laid upon another or arranged one on top of another that is separated by adjacent beds planes or layers.
Therefore, Strata are the layers of rock or soil that are distinguishable from other layers that have beenlaid down upon one another over the history of the earth.
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There are two forms of glucose (alpha-glucose and beta-glucose) in equilibrium.These isomers can interconvert through amechanism called mutarotation.Draw the two possible chair conformations for alpha-glucose. Circle the more stable conformation and explain your reasoning.(Hint: For full credit(1) drawbonds that are parallel correctlyand (2) draw the equatorial bonds with the correct directionality). (6 points).
Answer:
Please find the solution in the attached file.
Explanation:
The two chairs of the confirmation of the alpha glucose were defined in the attached file.
2. Acceleration is______
proportional to mass,
Answer:
Inversely
Explanation:
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Commercial soaps are mixtures of ionic compounds typically made up of monatomic cations, such as Na and K , and organic polyatomic anions derived from fatty acids. These negatively charged molecular ions are characterized by the presence of hydrocarbon chains which are 12 to 18 carbon atoms long. How hard (solid, insoluble) or soft (liquid, soluble) a soap is depends on the nature of the anions and cations present in the system. Analyze how each of the following factors may affect the hardness or softness of soaps:
1. The nature of the cations. For example, Na* vs Li* vs K.
2. The length of the hydrocarbon chain. For example, 12 carbons (laureate lon), 14 carbons (myristate lon), or 18 carbons (stearate lon).
Answer:
Following are the solution to the given question:
Explanation:
For question 1:
The sodium soap containing Na+ is strong whereas the softer or liquids were potassium soap.It's hard to use lithium soap.These Na+, K+, and Li+ ions act as the hydrophilic center.Calcium and Magnesium ions could be substituted by hard water with increasing hydrophilicity.For question 2:
The hydrophobicity of its carbon chain increases but one appears weaker with only an increased length.Therefore, the laureate is hard, while the stearate is soft.What is the Molar mass of zinc
Answer:
65.38 u
Explanation:
hope this helps you out!!!!!!!
They Mean D and not U H just took the test and its D i hope this help
LPLEASE HELP I AM STUCK I. THIS Q
Answer:
c
Explanation:
Place the following in order of increasing entropy at 298 K.
Ne Xe He Ar Kr
A) He < Kr < Ne < Ar < Xe.
B) Xe < Kr < Ar < Ne < He.
C) Ar < He < Ar < Ne < Kr.
D) Ar < Ne < Xe < Kr < He.
E) He < Ne < Ar < Kr < Xe.
Answer:
E
Explanation:
The simple rule of thumb is that as the atomic or molar mass of an atom increases, the entropy increases. This means that more the mass more will be entropy.
The atomic mass of various elements is as follows
Ne = 20 g/mol
Xe = 131 g/mol
He = 4 g/mol
Ar = 40 g/mol
Kr = 84 g/mol
Therefore, the order of increasing entropy must be
He<Ne<Ar<Kr<Xe.
Hence, option E is the correct answer.
The candle is lit and dilute ethanoic acid is poured down the inside of the beaker. As the acid reacts with the baking soda, bubbles of CO2 gas form. After a few seconds
the air in the beaker is replaced by 0.20 liter of CO2 gas, causing candle flame to go out. The density of CO2 gas is 1.8 grams per liter at room temperature.
Choose the correct structural formula for the acid that was poured into the beaker.
Answer:
It’s answer #2
Explanation:
I only know this because i just got it wrong
The correct structural formula for the acid that is poured into the beaker is CH₃COOH.
What is acetic acid?Acetic acid is also called ethanoic acid. It is form as a byproduct of fermentation. It forms vinegar. Vinegar is 4 to 6% acetic acid with water.
It is widely used in homes as cleaning agent, in cooking, washing etc.
Thus, the correct option is 2, CH₃COOH.
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How can light from the sun cause skin cancer?
The sun is the source, and the change is damage
A 5.0 L sample of gas at 300. K is heated to 600. K. What will the new volume of the gas be?
Answer:
[tex]V_2=10L[/tex]
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to calculate the required new volume by using the Charles' law as a directly proportional relationship between temperature and volume:
[tex]\frac{V_2}{T_2} =\frac{V_1}{T_1}[/tex]
In such a way, we solve for V2 and plug in V1, T1 and T2 to obtain:
[tex]V_2=\frac{V_1T_2}{T_1}\\\\V_2=\frac{5.0L*600K}{300K}\\\\V_2=10L[/tex]
Regards!
Determine la temperatura Kelvin de 2.49 moles de gas contenido en un
recipiente de 1.0 L a una presión de 143 kPa. *