The two strands of DNA are held together by hydrogen bonds.
What is chemical bond?A chemical bond is an attraction between two atoms or ions that allows the formation of chemical substances. Chemical bonds are formed when the atoms share or transfer electrons in order to obtain a full outer shell of electrons, achieving a more stable electron configuration. This can happen through covalent bonds, ionic bonds, hydrogen bonds, and other types of bonds. Chemical bonds are responsible for the stability of molecules and are responsible for many of the physical and chemical properties of substances.
These hydrogen bonds form between the nitrogenous bases of the two strands of DNA. Adenine (A) on one strand always bonds with thymine (T) on the other, and cytosine (C) always bonds with guanine (G). This highly specific arrangement of base pairs is essential for the replication and transcription of genetic information.
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b) During the reaction, 10.60 cm³ of gas is produced in 40.0 s.
Calculate the mean rate of reaction during this time. Include units
Answer:45000
Explanation:
If an element is written in hyphen notation, such as
Phosphorous-32, what would the mass of one mole of
this element be?
The mass of one mole of phosphorus-32 is approximately 31.97 g/mol.
What is Phosphorus-32?The chemical element phosphorus has an isotope called phosphorus-32 (P).Its atomic nucleus contains 32 protons, giving it a unique atomic number.Due to its total of 32 nucleons, phosphorus-32 has a mass number of 32 (protons and neutrons).Because phosphorus-32 is a stable isotope, it does not decay radioactively.mole is frequently created in nuclear reactors, but it can also be acquired naturally.In industrial and environmental investigations, phosphorus-32 is frequently utilized as a tracer to monitor the motion and behavior of chemical molecules.Phosphorus-32 is used in medicine to treat cancer because it generates beta particles that can kill cancer cells.To learn more about phosphorus-32 from the given link:-
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Scientists want to investigate the effects caffeine on short term memory by randomly assigning 200 volunteers to intake 86mg of caffeine before a memory quiz and the remaining 200 volunteers to intake 86mg of a placebo before taking a memory quiz. The quiz score of each volunteer is recorded.
What is the response variable?
The response variable in this study is the memory quiz score of each volunteer.
The response variable is the outcome of the study that the scientists are interested in measuring and analyzing. In this case, it is the memory quiz score of each volunteer. The memory quiz is used as a measure of the effect of caffeine on short-term memory.
The scores of the quiz will be used to determine if there is a significant difference between the scores of the group that consumed caffeine and the group that consumed the placebo.
The response variable will be used to draw conclusions about the effect of caffeine on short-term memory and it can be quantitative in nature. The scores can be analyzed and compared to understand the relationship between caffeine intake and memory retention.
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If two atoms that have the same mass number must have the same. True or False?
Answer: False
Explanation:
Every atom of an element will have the same number of protons in its nucleus. This is how we set apart different elements. Therefore, if two elements were to have the same mass numbers but different atomic numbers, they cannot be considered atoms of the same element
What name is given to substances (both soluble and insoluble) such as metal hydroxides and metal oxides that can neutralise acids?
The name given to the substance such as metal hydroxides and metal oxides that can nuetralise acids is Base or Alkali.
A base is a proton-accepting molecule or ion, according to chemists. That makes OH- a base. They continue to refer to bases dissolved in water as "alkali." Sodium hydroxide, for example, dissolves in water and separates into Na+ and OH-ions. The result is an alkali, and it is a source of the base OH-.
Some properties of bases are given below:
Bases taste bitter Bases release a hydroxide ion in a water solution.Bases neutralise acids in a neutralisation reaction Bases denature protein Bases turn red litmus to blueLearn more about bases here:
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In a chemical reaction, 2400kJ per mole of reactants is absorbed when bonds are broken. 3200kJ per mole of products is released when bonds are made. What is the enthalpy change for this reaction?
The enthalpy change for the chemical reaction in which 2400kJ per mole of reactants is absorbed when bonds are broken and 3200kJ per mole of products is released when bonds are made is -800 kJ.
What is the enthalpy of a reaction?The enthalpy change of a chemical reaction that takes place at constant pressure is known as the Heat of Reaction (also known as the Enthalpy of Reaction). It is a thermodynamic unit of measurement that can be used to determine how much energy is released or created per mole during a reaction.
Enthalpy change = sum of bond energies of reactants - sum of bond energies of products
Enthalpy change of the reaction = 2400 - 3200 kJ
Enthalpy change of the reaction = -800 kJ
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Select all intermolecular forces that contribute to creating a solution of KBr in H20. a.lon-dipole b.London Dispersion c.H-bonding d.Dipole-Dipole
The intermolecular forces that contribute to creating a solution of [tex]KBr[/tex] in [tex]H_2O[/tex] are Ion-Dipole Intermolecular force and H-Bonding.
[tex]KBr[/tex] is an ionic compound, which contains potassium ions ([tex]K^+[/tex]) as cations and Bromide ions ([tex]Br^-[/tex]) as anions.
On the other hand, [tex]H_2O[/tex] is a polar compound. In [tex]H_2O[/tex], as the electronegativity of oxygen is much greater than that of hydrogen, the oxygen atom attracts the electrons of the covalent bond towards itself. Therefore, hydrogen atoms get partially positive and oxygen atom gets partially negative.
Hence, when [tex]KBr[/tex] is added to water, there is an Ion-Dipole intermolecular force acting in between them.
It is also true that bromine is highly electronegative as compared to hydrogen. Thus, there will be the formation of hydrogen bonding in between [tex]KBr[/tex] and [tex]H_2O[/tex].
Hence, The intermolecular forces that contribute to creating a solution of [tex]KBr[/tex] in [tex]H_2O[/tex] are Ion-Dipole Intermolecular force and H-Bonding.
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Which of the following CANNOT weigh 1 amu? Why?
a. Atoms because they always weigh more than 1 amu
b. Electrons because they are the lightest subatomic particle
c. Protons because they always weigh more than 1 amu
d. Neutrons because they don't have any mass
Answer: Electrons
Explanation: Electrons are much smaller than Protons and Neutrons. Protons and neutrons each weigh about 1 amu.
Part B
It's time to get started. Fill the plastic bottle to the brim with water. Then pour
graduated cylinder or other measuring tool to measure the total capacity of th
may need to fill the measuring tool multiple times. To recall how to use a grad
video on measuring volume before continuing.
If you are using household measuring tools, use these conversions to record t
bottle in milliliters (mL). Visit the math review for help with converting units
• 1 cup = 240 mL
1 tablespoon = 15 mL
●
• 1 teaspoon = 5 mL
What is the capacity of the bottle in milliliters?
W
Gradually graduated cylinders are available in a variety of sizes, or volume capacities, and, like a measuring cup, are used to determine volume by pouring liquid to the cylinder and comparing the liquid level to the graduated scale. The volume that was measured is the same as the amount of liquid that was put inside the cylinder.
How to measure the volume of a liquid using graduated cylinder?Similar to weighing, determining the volume of a liquid is a fundamental and common lab procedure.Both a graduated cylinder and a burette are commonly used to measure liquid volume.A graded cylinder is, as its name suggests, a cylindrical glass or plastic tube that is sealed at one end and has a calibrated scale etched (or marked) on its exterior. Gradually graduated cylinders are available in a variety of sizes, or volume capacities, and, like a measuring cup, are used to determine volume by pouring liquid to the cylinder and comparing the liquid level to the graduated scale. The volume that was measured is the same as the amount of liquid that was put inside the cylinder. As a result, the graduated cylinder and similar apparatus (volumetric flasks, Erlenmeyer flasks, and beakers) are categorized as to-contain (TC) apparatus.The Complete Question is graduated cylinders.
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Gradually graduated cylinders are available in a range of diameters, or volume capacities, and, like a measuring cup, are used to calculate volume by pouring liquid into the cylinder and comparing the liquid level to the graduated scale.
How can I use a graduated cylinder to determine a liquid's volume?The measurement of a liquid's volume is a fundamental and frequent lab process, similar to weighing.The volume that was calculated matches the liquid volume that was placed inside the cylinder.Liquid volume is often measured using a graduated cylinder or a burette.Gradually graduated cylinders are available in a range of diameters, or volume capacities, and, like a measuring cup, are used to calculate volume by pouring liquid into the cylinder and comparing the liquid level to the graduated scale.The volume that was calculated matches the liquid volume that was placed inside the cylinder.Thus, the graduated cylinder and related equipment (volumetric flasks, Erlenmeyer flasks, and beakers) are referred to as to-contain (TC) apparatus.The complete question is,
Graduated cylinders represent .
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Plants such as the venus flytrap produce chemical compounds that break down insects into substances that are usable by the plant. The chemical compounds that break down the insects are most likely.
The chemical substance that the Venus flytrap produces can be thought of as a biological catalyst.
Enzymes can be thought of as biological catalysts.
Plants that break down insects into components the plant can use, like the Venus flytrap, create chemical compounds. Most likely, BIOLOGICAL CATALYSTS are what breaks down the insects' chemical makeup. Among plants, the Venus Flytrap is a carnivore. It possesses a mechanism that captures other species and finally ingests them. It smells bad because of what it consumes. There are various carnivorous plants that use different methods to draw in and capture small animals or species.
This enzyme can be thought of as a biological catalyst that quickens a chemical reaction while maintaining the equilibrium.
The simple fact that the enzymes' actions accelerate up biological reactions within an organism has led to their classification as biocatalysts.
A biological catalyst that aids in turning the insect into material is what the flytrap generated.
As an illustration, consider the salivary enzyme that aids in the conversion of starch to simple sugar.
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Drag each label into the appropriate position to identify which chemical classification it describes. - Steroid - Peptide 1. Utize CAMP DAG, or IP3 systems 2. Bind to receptors in the cells nucleus 3. Require a transport protein 4. Hydrophobic 5. Pass directly through the plasma membrane 6. Hydrophilic 7. Elicit responses over several hours to days 8. Elicit responses almost immediately 9. Require second 10. Bind to membrane bound receptors messenger systems
Peptides are hydrophilic, elicit immediate responses, require secondary messenger systems and binds to membrane bound receptors whereas steroids are hydrophobic, requires a transport proteins, binds to the receptors which are present on the nucleus of the cell.
Steroids are hydrophobic in nature and due to this hydrophobic nature, they are able to pass through the plasma membrane directly. They bind to the receptors which are present in the nucleus and not on the plasma membrane. They do not elicit response immediately but take several hours to even days.
Peptides being hydrophilic cannot cross the plasma membrane directly. They bind to the receptors which are present on the plasma membrane. They use the DAG, cAMP or IP3 systems.
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insulators are different than conductors in that insulators
a. do not contain electrons or protons b. have a weaker affinity for electrons c. do not contain any charge
d. do not allow charge to freely move
The correct answer is D. Conductors have more free electrons as compared to insulators.
There are two different types of substances on the basis of their electrical properties: conductors and insulators. Conductors are those that can pass electricity through it. Example: Water. Insulators are those which cannot pass the electricity or the electric motion through themselves. Example: air. This is because the no of free electrons that will carry the charge is more in the case of conductors. Charges in insulators are restricted to one position only which made it suitable for wire coatings.
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particle derives its name from the fact that it has no electrical charge; it is neutral and found in the nucleus of an atom____
Because it is electrically neutral and can be found in the nucleus of an atom, this particle is known as a neutron. The nucleus contains the neutron, an elementary particle.
Except the atom of pure hydrogen. The fact that the particle has no charge and is electrically neutral gives rise to its name. Neutrons have the highest density. Every atom's nucleus, with the exception of basic hydrogen, is home to a neutron, a subatomic particle. The fact that the particle has no charge and is electrically neutral gives rise to its name. Neutrons have the highest density. Hydrogen is a chemical element with atomic number 1 and the letter H. Hydrogen is the lightest element.
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An apple placed in a sealed
container has a mass of 160
grams. What would the mass of
the apple be after 6 weeks of
decomposition?
A. 160 grams
B. 80 grams
C. 40 grams
The apple weighs 80 grams after 6 weeks of deterioration. The correct answer is option (B).
Does decomposition lose mass?More recalcitrant chemicals are degraded in the latter stages of breakdown. Decomposition reactions occur when complex chemical entities split apart into smaller components. Decomposition reactions often demand energy input. Simply put, mass is a measurement of a body's amount of matter. Matter is everything that has both volume and mass.
Although not linearly, the overall percentage of decomposition was highly correlated with carcass mass. A particle's or an object's mass is a dimensionless number that indicates how much matter is present. The kilogram serves as the standard mass unit in the International System (SI).
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Answer:
the correct answer is A.
Explanation:
How is 2 ATP produced in the Krebs cycle?.
2 ATP produced in the Krebs cycle from each pyruvate molecule during the conversion of succinyl-CoA to succinate.
In the presence of the enzyme succinyl CoA synthetase, Kreb's cycle only generates 1 molecule of ATP from each pyruvate molecule during the conversion of succinyl-CoA to succinate.
Glycolysis converts one glucose molecule into two pyruvate molecules, both of which enter the Kreb's cycle at the same time.
Thus, when one glucose travels through aerobic respiration, 2 ATP are ultimately created from Kreb's cycle through substrate-level phosphorylation.
The reduced coenzymes NADH and FADH₂ work as intermediary chemicals in the citric acid cycle to supply protons and electrons to the electron transport chain. The subsequent oxidative phosphorylation produced by the electron transport chain produces more ATPs. In addition to producing 2 ATP, the citric acid cycle also phosphorylates its substrate.
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URGENT!!! from september 1 to june 1, the number of daylight hours observed each day in new york state will...
From september 1 to june 1, the number of daylight hours observed each day in new york state will be option A: Decrease only.
What is the daylight about?The number of daylight hours observed each day in New York State will go down. This is due to the earth's tilt on its axis and its orbit around the sun, which causes the amount of daylight to change throughout the year.
In the northern hemisphere, the fall and winter months have shorter daylight hours than the spring and summer months. On September 1st, it is the start of fall, which means the days will start getting shorter.
Therefore, As we move towards June 1st, the days will continue to get shorter until we reach the shortest daylight hours of the year on the winter solstice (around December 21st or 22nd), after that the days will start getting longer again.
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Which of the following elements is a noble gas?
A) Sodium
B) Chlorine
C) Argon
D) Calcium
Answer:
The correct answer is C.) Argon.
Explanation:
Noble gases are a group of elements in the periodic table that are characterized by their low reactivity and tendency to remain as gases at standard temperature and pressure. Argon is one of the noble gases, along with helium, neon, krypton, xenon, and radon. These elements have full electron shells, which makes them stable and unreactive, and they do not easily participate in chemical reactions.
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Mole Ratio Practice
A chemical reaction's mole ratio, which is determined from the coefficients of the constituent substances in a balanced equation, is a conversion factor between the compounds.
What is the mole ratio?In a balanced chemical reaction, the ratio of any two compounds' mole amounts—measured in moles—is known as the mole ratio. In the balancing chemical equation, the ratios of the molecules required to accomplish the reaction are compared. A balanced equation cannot have a mole ratio calculated. In many chemistry situations, the ratio of reactants to products is calculated using moles.Take a look at the chemical formula N2 + 3H2 2NH3 to see how it balances.In this case, N2 coefficients equal 1.H2 = 3 has coefficients.Indicators for NH3 are 2Input for the chemical equation came from this coefficient's molecular details.In this equation, 1 mole of nitrogen (N2) interacts with 3 moles of hydrogen (H2) to create 2 moles of ammonia (NH3).To Learn more About mole ratio, Refer To:
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what mineral might contribute to hypertension if eaten in excess?
The main minerals that may contribute to hypertension when consumed in excess include sodium, potassium, and calcium.
Eating too much of certain minerals can lead to hypertension, a condition that can cause high blood pressure.
Too much sodium can cause the body to retain water, leading to increased blood pressure.
Potassium can also affect blood pressure, as it influences the amount of sodium in the body.
Calcium is important for regulating the contraction and relaxation of muscles, including those of the heart. When calcium levels become too high or excess, it may lead to hypertension.
Therefore, it is important to keep an eye on your mineral intake to ensure that it remains within healthy limits.
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To reach an absolute pressure of 3atm, you must dive down (in water) to depth of approximately 20m. Why might someone think that the answer was 30m?.
The gauge pressure at a depth below the surface of a water is 3.0 atm.
If a person cannot tell the difference between gauge pressure and absolute pressure, they might believe the height (depth) is 30 metres.
Given the information below:
A = 3 atm is the atmospheric pressure.
A = 20 metres for height vs depth.
• 30 metres of depth at height.
Scientific evidence
• Gravitational acceleration is 9.8 m/s2.
• Water has a density of 1000 kg/m3.
In order to determine the gauge pressure at a depth below the water's surface:
Gauge pressure can be calculated mathematically using this formula:
P = pgh
where: G is the gravitational acceleration.
Water is at a height (depth) of h.
The formula reads as follows when the supplied parameters are substituted: P = 1000 × 9.8 x 30 Gauge pressure = 294000 Pa
The figure in Pascals would then be converted to atmosphere.
Conversion:
1 atm equals 101325 Pa, and X atm is 294000 Pa.
X = 294000 / 101325 X = 2.90 X = 3.0 atm is the result of cross-multiplying.
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oxides of active metals, such as cao, react with water to form?
Active metals, such as calcium oxide (CaO), react with water to form an oxide-water reaction.
This reaction produces an alkaline solution, which has a pH higher than 7. As a result, the water will become less acidic, and the oxide will be converted into its hydrated form.
This reaction is an important part of the water treatment process, since it helps to reduce the acidity of water and make it safer for drinking.
Additionally, the alkaline solution produced by the reaction can be used to neutralize acidic materials, making it useful for a variety of industrial and environmental applications.
Active metals such as calcium oxide (CaO) are capable of reacting with water to form oxides.
The reaction between the oxides and water can be used in a variety of different applications, such as to create materials with high strength and durability, or to generate power through the combustion of the oxides.
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Analyze Data In the figure to the left, write the charge of the oxygen atom and the oxygen ion. Write the charge to the left of the word "charge."
The image that is shown is the gain of two electrons by the oxygen atom.
What is an ion?We have to note that when we talk about the term "ion" we are talking about such a specie that can be formed by the loss or gain of electrons. Thus an ion is positive if it formed by the loss of electrons and the ion is negative if it is formed by the gain of electrons.
In the case of the image that we have here, we can see that there is again of two electrons by the oxygen atom and this is how we form the oxygen ion that has ten electrons and eight protons.
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Which orbital is portrayed on the right?
A maximum of two electrons will be placed in 1s first. With a maximum of two electrons, 2s will then be filled. With a maximum of 6 electrons, 2p will then be filled.
What's the appearance of the p orbital?A maximum of two electrons will be placed in 1s first. With a maximum of two electrons, 2s will then be filled. With a maximum of 6 electrons, 2p will then be filled.A maximum of two electrons will be placed in 1s first. With a maximum of two electrons, 2s will then be filled. With a maximum of 6 electrons, 2p will then be filled.Each shell can only carry a certain amount of electrons: the first shell can hold two electrons, the second shell can hold eight electrons (2 + 6) and so on, the third shell can hold 18 electrons (2 + 6 + 10).To learn more about orbital refer to:
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if you use too much hot solvent when dissolving your crude compound, how will that impact the recovery of your compound and why?
Recrystalization will occur.The solution may become too diluted for crystals to form if you add too much solvent. Impurities will be captured by a hastily formed crystal's lattice. The crystals that result will also be smaller.
What is Recrystalization?Recrystallization is a physical process used to separate compounds based on how soluble they are. Heating the material to dissolve the compound with impurities in a mixture of a suitable solvent completes the procedure. We can remove the desired chemical or contaminants from the mixture using this method.
The solution may become too diluted for crystals to form if you add too much solvent. The flask needs to be gently cooled, first at room temperature and then in cold water. Impurities will be captured by a hastily formed crystal's lattice. The resulting crystals will also be smaller.
This method is used to harden steel in order to eliminate all strain hardening side effects, including the significant plastic deformation brought on by cold working.The crystals that frequently form when the compound precipitates out gave it its name. The natural expansion of larger ice crystals at the expense of smaller ones is another definition of recrystallization.Some commonly effective mixes include diethyl ether-methanol (or ethanol) for polar molecules (particularly esters, alcohols, and hydrocarbons) and diethyl ether-petroleum ether (or benzene) for strongly linked solids (notably amides, alcohols), as well as many natural products.The three main types of recrystallization are;
Single-solvent recrystallization.Multi-solvent recrystallization.Hot filtration-recrystallization.To know more about Recrystalization, refer to:
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Scientists are developing new methods of conservation to preserve species in danger of extinction. Captive breeding programs try to restore the population of a species. Germ plasm is any form of genetic material contained in reproductive or germ cells or plants and animals. Germ plasm banks also knowns as gene banks save sperm, egg or DNA. Farmers also save germ seeds to replant seeds of plants.
13. One way scientists save species in danger of extinction is by:
A logging tropical rain forests
B developing new methods of conservation
C removing species from endangered lists
D abandoning new methods of conservation
Answer:
B. Developing new methods of conservation
Explanation:
Such as the Germ Plasm in the excerpt. This is an example of new conservation methodology
how many grams of water are produced when 44 grams of propane react?
When 44 grams of propane reacts, 72.0 g of water is produced.
The molar mass of propane (C₃H₈) is 44 g/mol and that of water (H₂O) is 18 g/mol.
44.0 grams of propane is equivalent to 1 mole of propane.
According to the balanced chemical equation,
C₃H₈+ 5O₂ → 3CO₂ + 4H₂O
1 mole of propane produces 4 moles of water.
So, burning 44.0 g (1 mol) of propane will produce 4 moles of water.
Mass of water = moles x molar mass
Mass of water = 4 × 18 = 72.0 g.
So, the mass of water is 72.0 g.
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Pleaseee help now ASAP please
Diphosphorus trichloride has a phosphorus content of 22.554%. Phosphorus is indeed a mineral that can be found in many foods naturally as well as in supplements. It has a number of functions in the body. It is a crucial component of cell membranes, bones, and teeth.
What occurs if you have a high phosphorus level?Frequently, high phosphorus does not result in any symptoms. On the other hand, an excess of phosphorous in your blood can result in calcium loss from your bones and other body tissues, resulting in low calcium levels (also called hypocalcemia). Low calcium levels do result in symptoms like: tense muscles
Does phosphorous hurt people?Severe vomiting & diarrhea, both of which are characterized as "burning," "luminescent," and with a garlic-like odor, are frequently brought on by ingestion of basic white or yellow phosphorus. Dysrhythmias, comas, hypotension, and even death are potential additional symptoms of severe poisoning.
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How many molecules are the in 1.8g of water molecule H2O
The number of the molecules of water is 1.8 g is 6.02 * 10^22 molecules.
What are the molecules?We can be able to obtain the molecules from the Avogadro's number. We know that the number of the molecules that we find in the compound can be gotten by the use of the proposition that was put forward by Avogadro.
Number of moles of the water = 1.8g/18 g/mol = 0.1 moles
We know that;
1 mole of water contains 6.02 * 10^23 molecules of water
0.1 moles of water would contain 0.1 mole * 6.02 * 10^23 molecules/ 1 mole
= 6.02 * 10^22 molecules
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what is the approximate residence time for a water molecule in a river?
The residence time for a water molecule in a river is typically between 1 and 5 days.
What is molecule?A molecule is the smallest particle of a substance that can still be identified as that substance. Atoms are held together via molecular bonds to form molecules. Molecules can be as little as two atoms or as large as thousands of atoms. Atoms are held together via molecular bonds to form molecules. Molecules can be as little as two atoms or as large as thousands of atoms. The properties of a molecule are determined by the arrangement of its atoms and the type of chemical bonds that hold them together. Molecules can exist as individual particles or as part of a larger structure. Molecules can be found in all forms of matter including gases, liquids, and solids. They are the building blocks of all living things and play an important role in chemical reactions.
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In the activity series, the more active elements are found
(a) at the bottom
(b) in the middle
(c) at the top
(d) both (a) and (c)
Answer:
Number three the answer is d
