Salt water is more dense than fresh water. A ship floats in both fresh water and salt water. Compared to the fresh water, the volume of salt water displaced by the ship is less.
For floating objects, the weight of the displaced fluid equals the weight of the object. For a more dense fluid, less of that fluid needs to be displaced to create a fluid weight equal to the weight of the object. Since the salt water is more dense, it will not need as much displaced.
The overall density of the ship is less than the density of the water. A ship is constructed to be watertight. Because it is watertight, the metal is able to enclose a volume of air sufficient to lower the average density to less than 1. If it were not watertight, the water would rush in, displace the air, and because metal is more dense than water it would not float. This is what is known as “sinking”, and why ships do not work when they have holes in them.
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What is the efficiency of a ramp if the input work is 96 J and the output work is 24 J?
The efficiency of the ramp is 0.25 or 25% if the input work is 96 J and output work is 24 J
What is efficiency?This is the output-to-input ratio, which is frequently multiplied by 100 to get a percentage.
Given values: Input work = 96 J, Output work = 24 J
To find: Efficiency of a ramp= ?
Formula used: percent efficiency = (output work/input work) × 100
The efficiency will range from 24 J to 96 J because both the output and the input in this scenario take the form of work.
Percent efficiency = [tex]\frac{24}{96} \times 100[/tex]
= 25%
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The noble gas neon is used for filling neon signs. Like other noble elements, it has a full octet (complete outer energy level) of electrons, which makes the gas.
The noble gas neon is used for filling neon signs. Like other noble elements, it has a full octet that is complete outer energy level of electrons, which makes the gas unlikely to combine with the other elements.
The Neon is the noble gas. according to the octet rule the element should contains the 8 valence electrons in the outer most shell to fulfill the octet rule and acquire the stability. the atomic number of the neon is 10 the electronic configuration is given as :
Neon atomic number 10 : [He] 2s² 2p⁶
so, the outermost electrons in the valence shell is 8 . so the noble gas itself very stable . neon does not react with any other elements to gain the stability.
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If you have 7. 9 x 1024 molecule of methane (CH4), how many mole of methane are preent?
13.11 moles of methane is present in 7.9×[tex]10^{24}[/tex] molecules of methane
The number of moles of a substance is nothing but the the ratio of its given mass in the chemical reaction to the mass of one mole of the substance. One mole of any substance equals Avogadro's number, that is, 6.023×[tex]10^{23}[/tex]. It is also used to express concentration units such as mole per liter or also molecular weight.
Avogadro's number, is the number of units in one mole of any substance , is equal to 6.02214076 × [tex]10^{23}[/tex]. The units can be electrons, atoms, ions, or molecules, depending on the nature of the substance and the character of the reaction as well.
According to Avogadro's law we can say that;
6.023×[tex]10^{23}[/tex] molecules of methane will contain 1 mole of methane.
Then we can calculate the number of moles present in 7.9×[tex]10^{24}[/tex] molecules.
⇒ 7.9×[tex]10^{24}[/tex] = 13.11 moles
6.023×[tex]10^{23}[/tex]
Therefore 13.11 moles are present in the above given question.
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how many milliters of 2.5 m hno3 contains enough nitric acid to dissolve an old copper penny with a mass of 3.94 g
25 mL of 2.5 m HNO₃ contains enough nitric acid to dissolve an old copper penny with a mass of 3.94 g
What is molarity?Molarity is a measure of the concentration of a chemical species, especially a solute, in solution and is expressed as the amount of substance per unit volume of solution. The most commonly used unit of molarity in chemistry is moles per liter in SI units using the unit symbols mol/L or mol/dm³.
For the given case,
Molar mass HNO₃ = 63.0 g/mol
Number of moles = 3.94 / 63.0
= 0.0625 moles
Volume = moles / molarity
V = 0.0625 / 2.5
V = 0.025 x 1000
= 25 mL
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On a sheet of paper, draw the Lewis structure for the following compound. Please use the periodic table if needed. SiCl4 Sample answer: A central upper S i is bonded in all four directions to upper C l; each upper C l has two electron dots on the 3 sides away from the bond. Check all features below that you included in your Lewis structure. correct number of Si and Cl atoms Si as the central atom line (single bond) between Si and each of the four Cl atoms six dots (electrons) associated with each Cl atom no other lines or dots
Check all features below that you included in your Lewis structure.
correct number of S and Cl atomsS as the central atomline (single bond) between S and each of the two Cl atomssix dots (electrons) associated with each Cl atomfour dots (electrons) associated with the S atomno other lines or dotsChlorine has a higher electronegativity than hydrogen but the attraction of the chlorine atom for electrons is not sufficient to remove an electron from hydrogen. distributed in Polar covalent bonds. Some atoms are exceptions to the octet rule because they have extended octets.
Hydrogen bonds are intermolecular forces acting between ammonia molecules. Due to the difference in electronegativity between the nitrogen and hydrogen atoms, a partial negative charge develops on the nitrogen atom and a partial positive charge develops on the hydrogen atom. Fluorine is the most electronegative of the group 17 elements, and iodine is the least electronegative. Therefore, the electronegativity difference between fluorine and iodine is the largest.
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The following statements were taken from procedures of four different investigations. The statement from which investigation is an example of repetition?
A. investigation 1
b. investigation 2
c. investigation 3
d. investigation 4
The statement from which investigation is an example of repetition is investigation 4. Option D.
Instructions are available in written or recorded form. The purpose of the statement is to summarize the information provided by those involved and prevent it from altering the story of what was witnessed. A hypothesis is a possible answer to a question. It is based on their own observations, existing theories, and information gleaned from other sources.
Scientists use hypotheses to make predictions. This is a testable statement that describes what the outcome of the investigation will be. A theory is a well-documented explanation of an observation. A scientific law is a statement that summarizes the relationships between variables. Experiments are controlled methods of testing hypotheses. A research study is a comprehensive set of techniques used to uncover secrets hidden.
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Calculations for Part B:
You will need to determine the identity of an unknown compound using only the knowledge that
you have 0.05 moles of it. There are three different possible identities for the compound:
● Bismuth Carbonate
Potassium Silicate
● Magnesium Sulfate
Using the common ions list, find the chemical formula of Bismuth Carbonate:
Find the molar mass of Bismuth Carbonate. Show Your Work.
If you had a sample of 0.05 moles of Bismuth Carbonate, what should the sample mass be, in
grams?
The chemical formula of Bismuth Carbonate is (BiO)2CO3 and the molar mass of Bismuth carbonate is 510 g/mol.
How to calculate molar mass of Bismuth carbonate?
Molar mass of (BiO)2CO3 = (atomic mass of Bi x number of Bi atoms) + (atomic mass of O x number of O atoms) + (atomic mass of C x number of C atoms)
molar mass = (209x2) + (16x5) + (12x1) = 510 g/mol.
How to calculate mass of (BiO)2CO3 in grams?
Mass in grams = number of moles x molar mass = 0.05 x 510 = 25.5g.
Therefore, the chemical formula of bismuth carbonate is (BiO)2CO3, it's molar mass is 510g/mol and it's mass in 0.05 moles is 25.5g.
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Every week, nina used 5 l of water from her rain barrel to water her plants. she did this until her rain barrel was empty. when nina first started watering, her rain barrel contained 75 l of water. which sketch represents this situation?
Assuming that you wanted to find out how long Nina's has been doing her watering activities, you should just simply divide the total amount of barrel with its daily usage. 75/5 = 15 weeks.
Her rain barrel held 75 L of water when she began watering. This indicates that there were 75 L left when she started at 0 weeks.
The first coordinate will therefore be; (0, 75). the y-axis is 75 and the x-axis is 0.
We are informed that she utilised 5 L of water from her barrel each week. Since 5 litres were consumed each week until the barrel was empty, the time it took for the barrel to be empty was 75/5, or 15 weeks.
This indicates that after the water is finished, the y-axis will be 0 L and the x-axis will be 15 weeks (0, 15).
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a ground state hydrogen atom absorbs a photon of light having a wavelength of 92.05 nm.92.05 nm. it then gives off a photon having a wavelength of 379.7 nm.379.7 nm. what is the final state of the hydrogen atom? values for physical constants can be found in the chempendix.
Answer:
The final state of the hydrogen atom is ground state after the emission of the photons.
The given parameters;
wavelength of the photon absorbed, λ₁ = 92.05 nm = 92.05 x 10⁻⁹ m
wavelength of the photon emitted, λ₂ = 1736 nm = 1736 x 10⁻⁹ m
The change in the energy of the photon is calculated as follows;
ΔE = hf₂ - hf₁
The new energy level is calculated as follows using Borh's model;
Thus, the final state of the hydrogen atom is ground state after the emission of the photons.
Explanation:
(a) write the dissolution reaction for solid nac2h3o2 below. (use the lowest possible coefficients. include states-of-matter under the given conditions in your answer.)
The dissolution reaction for NaC2H3O2 is as follows: -
NaC2H3O2 (s) ---> Na+ (aq) + C2H3O2 (aq)
Dissolution is the process by which a solute form a solution in a solvent. The rate at which the solute gets separated from the solvent is known as dissolution rate.
Once the ionic solid has dissolved, the anion that is formed is able to react as a base, with water as the acid. Write the net acid-base reaction that occurs when dissolved NaC2H3O2 reacts with water.
Dissolution of a Chemical or Physical Change. Dissolution can be a physical or a chemical change based on the solute and the solvent. If the solute breaks up into individual atoms and reacts with the solvent, then a chemical as well as physical change takes place.
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I need help with this one
Option B. Element in area 4 is less lustrous than the element in area 3.
The periodic table additionally referred to as the periodic table of elements, is a tabular display of chemical factors. it's far widely used in chemistry, physics, and other sciences, and is usually visible as an icon of chemistry.
The periodic table (also known as the periodic desk of factors) is organized so scientists can fast parent the houses of character elements along with their mass, electron range, electron configuration, and their particular chemical properties. Ununennium, additionally known as eka-francium or detail 119, is the hypothetical chemical detail with image Use and atomic variety 119.
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what mass of sodium formate, nahco2, must be dissolved in 250.0 ml of 0.100 m formic acid (hco2h) to yield a buffer solution of ph 3.88?
15.13g is the mass of sodium formate, nahco2, must be dissolved in 250.0 ml of 0.100 m formic acid (hco2h) to yield a buffer solution of ph. 3.88
What is Sodium formate?The sodium salt of formic acid, HCOOH, is sodium formate, HCOONa. It typically appears as a fine, white powder. Since formic acid can be produced cheaply and in large quantities by carbonylating methanol and hydrolyzing the ensuing methyl formate, sodium formate is often made by neutralizing formic acid with sodium hydroxide. In the final phase of the production of pentaerythritol and in the crossing Cannizzaro reaction of formaldehyde with the aldol reaction result trimethylol acetaldehyde [3-hydroxy-2,2-bis(hydroxymethyl)propenal], sodium formate is also inevitably produced as a by-product.
pH = pKa + log [base/acid]
3.88 = 3.752 + log (x / 1) {1 comes from the 1.00 M formic acid}
log x = 0.128
x = -0.89 M (molarity)
MV = g/molar mass
(0.89 mol/L) (0.250 L) = x / 68.0069 g/mol
x = 15.13 g
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7. How would the energy flow in a device that warms food without using a
flame or electricity? Record your evidence.
Energy flow in a device that warms food without using a flame or electricity is because of infrared radiation
When food or liquid become hot their molecule absorb energy and begin vibrating rapidly and start to bounce off each other and as they collide heat energy is produced and transferred which warm and cook our food and infrared radiation waves travel in any direction at the speed of light quickly heat food and mainly absorbed at the surface of whatever you are preparing and there are three process conduction and convention and radiation
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After the amino acid chain leaves the ribosome, which organelle then folds, modifies, and transports the protein?.
Answer: endoplasmisc reticulum
Explanation:
What describes an oxidizing agent?.
Consequently, an oxidizing agent is an electron acceptor. A species that can transfer electronegative atoms, particularly oxygen, to a substrate may also be thought of as an oxidizing agent.
Oxidizing substances are also referred to as oxidizers. Oxidizing agent illustrations An oxidizing agent is a material in a redox chemical process that obtains or "accepts"/"receives" an electron from a reducing agent (also known as an oxidant, oxidizer, electron recipient, or electron acceptor) (called the reductant, reducer, or electron donor). The electron is a subatomic particle with the symbol e or with an electric charge of one elementaryly negative charge. Due to their lack of known components or substructure, electrons, which are part of the first generation of the lepton particle family, are typically considered to be elementary particles.
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Which diagram represents the correct proportion of 87Rb to its decay
product, 87Sr, after two half-lives?
Top left corner is [tex]^{ 87} Rb[/tex] ( Diagram B) represents the correct proportion of 87Rb to its decay product, 87Sr, after two half-lives.
Why is it called half-life radioactive decay?The half life of a radioactive element is the time it takes for half of its original value to decay. This also means that one half life is the time it takes for a source's activity to reduce to half its original value.The half life of a material is an unique word that describes its radioactive decay. The half life of a material is the time it takes for it to lose half of its initial mass due to radioactive decay. This is how radioactive decay and half life are related.To learn more about radioactive decay refer,
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80 g of sodium hydroxide reacts with excess sulfuric acid to produce 142 g of sodium sulfate. What mass of sodium hydroxide would be needed in order to make 50 g of sodium sulfate? give your answer to one decimal place.
To create 50 grams of sodium sulfate, 28.16 grams of sodium hydroxide are needed.
What is gram?The International System of Units (SI) defines the gram as a unit of mass that is one thousandth of a kilogram. Another concept connected to mass is the gram.
The amount of matter that makes up a substance or an object is truly measured by its mass. The kilogram (kg) is the fundamental SI unit for mass, but lesser quantities are typically measured in grams (g). You would use a balance or perhaps a scale to measure mass.
According to the answer to the previous question, 80 grams of sodium hydroxide and 142 grams of sulfuric acid react to form sodium sulfate. So the amount of sodium hydroxide needed to make 50 grams of sodium sulfate is as follows:
80 × 50 / 142 = 28.16 grams.
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How many calories are needed to convert 1 g of liquid water at 10°c to solid ice at 0°c?.
The calories needed to convert liquid water is 90 calories.
The calories needed by the system depend on the heat released. The total heat received by the system will equal to total heat released by objects. It should follow
Q released = Q received
The heat can be defined by
Q = m . c . ΔT
where Q is heat, m is mass, c is the specific heat constant and ΔT is the change in temperature.
The given parameters are
m = 1 g
T = 10 °C
T' = 0 °C
c = 1 kal / g °C
L = 80 kal / g
Find the change in temperature
ΔT = T - T' = 10 - 0 = 10 °C
Find the calories needed to change temperature until 0 °C
Q = m . c . ΔT
Q = 1 . 1 . 10
Q = 10 calories
Find the calories needed to change water into solid ice
Q = m . L
Q = 1 . 80
Q = 80 calories
Hence the total calories is 90 calories.
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What is determined by the distance at which the lowest potential energy is achieved and the distance at which positive charges have the least repulsion?.
As the atoms approach one another, the positive charges in the two nuclei begin to reject one another, increasing the potential energy. The bond length is determined by the distance at which the lowest potential energy is reached.
The bond length is determined by the internuclear distance at which the potential energy minimum occurs. The equilibrium bond length, which captures the distance at which the two atoms bounce due to thermal motion, is a better phrase. In general, shorter bonds result in stronger bonds.
The bulk of atoms obtain a lower potential energy when they are bonded to other atoms. The potential energy of the system is said to be zero at this distance.
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Considering what was discovered about the atom, describe one possible model that could be concluded from Rutherford’s data.
From the Rutherford results of the atom, we can say that it would fit a planetary model of the atom.
What is the Rutherford model?We know that that atom is the smallest particle of a substance that can take part in a chemical reaction. There were various models of the atom that could be explained based on the empirical results that were obtained by the experiments of a lot of scientists.
In the case of the Rutherford model of the atom, we know that experiment had to do with the bombardment of the thin gold foil with alpha particles and some of the alpha particles were scattered at large distances.
A zinc sulfide screen was used to identify the positions of the alpha particles that were scatted in the course of the experiment as shown.
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1. List the number of atoms and elements shown below. (4 points total: 1 point each)
Any substance that is resistant to breakdown by common chemical reactions.
What is element?Any substance that is resistant to breakdown by common chemical reactions.The building blocks of which all matter is made are called elements.There are 118 chemical elements that are currently known. About 20% of them have only been created synthetically in the lab and are only known because they do not exist in nature or are only present in trace levels.Of the known elements, 11 are gases under normal circumstances (hydrogen, nitrogen, oxygen, fluorine, chlorine, and the six noble gases), 2 are liquids (two more, cesium and gallium, melt at just above or around room temperature), and the remaining 7 are solids.Elements No. of atoms
[tex]$2 \mathrm{CH}_4$[/tex] 2- Carbon and 8-Hydrogen
[tex]$10 \mathrm{Mg}(\mathrm{OH})_2$[/tex] 10-Magnesium, 20-Oxygen and 20-Hydrogen
[tex]$5 \mathrm{Al}_2\left(\mathrm{SO}_4\right)_3$[/tex] 10- Aluminum, 15- Sulfur and 60- Oxygen
[tex]$3 \mathrm{H}_2 \mathrm{O}$[/tex] 6- Hydrogen and 3- Oxygen
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HELP PLS
I NEED THE BOTTOM TO BE a matched up by the top PLS ASSAPPp
Answer:
a: milliliters and grams | b: heat | c: force | d: solid | e: attraction
Explanation:
A: milliliters are cubic and grams are weight.
b: heat make particles go faster
c: thus more collisions and temperature and force
d: solid, they can't move, just vibrate
e: attraction
What are 5 label requirements?.
The label requirements are portion size, carbohydrate, total Calories, you may see how many calories constitute one serving of the product. This figure is directly related to serving size.
What is carbohydrate ?Sugar molecules make up carbohydrates, or carbs. Carbohydrates are one of the three primary nutrients included in meals and beverages, along with proteins and fats.
Glucose is created through your body's breakdown of carbs. The primary source of energy for the cells, tissues, and organs in your body is glucose, sometimes known as blood sugar.
Carbohydrate-rich foods are a crucial component of a balanced diet. The body receives glucose from carbohydrates, which is then transformed into energy for maintaining biological processes and engaging in physical activity.
Thus, Cholesterol, Saturated and trans fats. Sodium, fiber and sugar are included in the total carbohydrates, along with protein, vitamins, and other nutrients.
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If you need more information about your cloth pieces, which electromagnetic technology could you use
and why? Does the technology you selected use infrared, ultraviolet, or visible light?¶
Fluorescence is a term for the visible light that some dyes emit when exposed to UV radiation. UV rays are present in many papers and fabrics.
What modern devices make use of electromagnetic radiation?There are many practical, everyday uses for electromagnetic waves, including mobile phone and radio broadcasting communication, WiFi, cooking, eyesight, medical imaging, and cancer treatment.
If we could see ultraviolet light, what would we see?If you could see ultraviolet light, it would make the world even more blue since it scatters even more than regular blue light does. For it to It would appear as though the atmosphere suddenly become foggy and dense, with a blue haze hanging over everything. Every time you turned to look into the distance, it was always dimly illuminated.
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the bond formed between the carboxylic acid group of one amino acid and the amino group of the next amino acid is a(n) bond.
Peptide bonds are amide connections between two amino acids' -carboxyl and -amino groups.
The covalent link created by the dehydration reaction (loss of a water molecule) between the carboxyl group of one amino acid and the amino group on the next is known as a peptide bond. Peptide bonds are created in polypeptides through a condensation reaction between the carboxyl groups of one amino acid and the amino groups of the following amino acid, all while removing water. When the carboxyl group of one molecule combines with the amino group of the other molecule, releasing a molecule of H2O as a result, a peptide bond is created between the two molecules.
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what is the current estimate for the number of photographs snapped in a year? over half-a-trillion over 380 billion nearly one trillion 350 million
The latest estimate for the annual number of photos taken is 1.72 trillion.
In 2022, how many pictures?People are taking more images all around the world, and Rise Above Research, a consulting organization that conducts market research for the digital imaging sector, predicts that the total number of photos taken worldwide will reach 1.5 trillion in 2022.
How many pictures are taken annually?Around the world, 1.72 trillion images are taken annually, or 54,400 each second or 4.7 billion per day. Every year, around 2.3 trillion pictures will be taken by 2030. Photutorial research indicates that 1.2 trillion photos were shot globally in 2021. In 2022, the amount will rise to 1.72 trillion.
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which intermolecular forces are possible in a mixture of ethyl acetate (ch3cooch2ch3) and n-hexane (c6h14)?
London dispersion and dipole-dipole interaction make up the bulk of the intermolecular forces in ethyl acetate liquid.
What kind of force exists between molecules in C6H14?Hexane, an alkane having a straight chain and six carbons but no double or triple bonds, is represented by the chemical formula C6H14. The only intermolecular forces that exist between this molecule and other molecules are London-dispersion forces, which are the least powerful intermolecular forces that exist between any two molecules.
Do polar bonding exist in ethyl acetate?Due to the fact that C=O, ethyl acetate is a polar substance. Additionally, because C-O bonds are polar, their bond dipole moments do not cancel one another out.
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What happens to a molecule with a bond dipole when the electric field is turned on.
When the electric field is turned on, the dipole moment ends up aligned parallel to the external electric field.
In electromagnetism, dipoles come in two different varieties. In electromagnetic systems, the separation of positive and negative charges is handled by the electric dipole. A pair of charges of equal magnitude and opposing sign that are typically close together is a straightforward illustration of this system. (An electret is a permanent electric dipole.)
In the current system, a magnetic dipole is a closed circuit. A single wire loop with a constant current is a straightforward illustration. The vector quantity dipole moment can be used to describe an electric or magnetic dipole. The electric dipole moment, which in a basic electric dipole points from a negative charge to a positive charge, has a magnitude equal to the sum of the electric charge intensities times the separation between the charges.
When defining the dipole moment, the "dipole limit" should always be taken into account. For instance, in order to maintain the product, the generated charge spacing should converge toward 0 while the charge strength should diverge toward infinity. (Continuous positive)
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Which scientist first proposed that the electron in the hydrogen atom can have only certain energies?.
The idea that an electron in a hydrogen atom can only have specific energies was first put out by Niels Bohr.
Niels Bohr was renowned for what?The Nobel Prize for 1922 was given in recognition of his study on the atomic structure. Since 1930, more and more of Bohr's activities at his Institute have been focused on studying the atomic nuclei's composition as well as their transmutations and disintegrations.
In his model of the atom, Niels Bohr used electrons that could only have exact solid orbits. The quantum concept was initially included into this atomic model. Due to the fact that hydrogen emits and absorbs light at particular wavelengths, that electron may wish to best arise in particular orbits.
Based on the notion that some physical quantities can only assume discrete values in the quantum world, Niels Bohr developed a principle for the hydrogen atom. In his desk-bound state theory, Bohr postulated that electrons no longer radiate energy as they orbit the nucleus but rather reside in states of constant energy. Bohr's artwork was entirely modified in response to the emission spectra of hydrogen.
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Which of the follow will eventually lead to cooler global temperatures on earth?.
Warmer temperatures will more water evaporate and will lead to more clouds. These clouds will shade the earth the sun, leading to cooler temperatures.
Explain the term water evaporation.
A type of vaporization called evaporation takes place on the surface of a liquid as it transitions into the gas phase. When humidity impacts the rate of evaporation of water, for example, a high concentration of the evaporating component in the surrounding gas considerably slows down evaporation. Depending on how they collide, the liquid's molecules transfer energy to one another during collisions. A molecule at the surface will escape and turn into a gas when it has enough energy to outpace the vapour pressure. Evaporation results in cooling because the energy from the evaporated liquid is lost, which lowers the liquid's temperature.
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