Answer:
Malleability means that metals can be hammered into sheets and foils. For example, aluminium foils are used for wrapping food stuffs, silver foils are used for decorative purposes on sweets and fruits. Ductility means that metals can be drawn into wires. Gold and silver wires are used in ornaments.
and For jewellery and ornaments, gold, platinum and silver are being used. For building purposes, iron and steel can be used. Iron and aluminium are used as utensils. The thermometer uses mercury and helps to monitor the temperature.
Explanation:
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5) Which element is an example of a metalloid?
A) gold
B) helium
C) iron
D) silicon
Please help with the picture above!!
Explanation: First split the compound into individual ions and assign oxidation states. You can give oxidation states with the help of the image provided below. Just cross-multiply the subscript. Every compound is in the format (Cation Anion). You will assign a positive charge to the cation and a negative charge to the anion. The subscript is the number of cations or anions present.
what type of dinosaur left foot prints?
its a cer graphic organizer
The term "ichnite" refers to preserved footprints, which are a sort of trace fossil and a window into of dinosaurs. They developed similarly to how our imprints do when we walk on squishy surfaces like mud.
What dinosaurs still exist now?Because they descended from the common ancestor of all dinosaurs, birds can be thought of as a living group of dinosaurs. There is no proof, however, that any dinosaurs, such as Tyrannosaurus, Velociraptor, Apatosaurus, Stegosaurus, or Triceratops, are still alive today, with the exception of birds.
Why did dinosaurs die out?Scientists already know that Earth was impacted by an asteroid or maybe a comet off the Mexico. Chicxulub, the subsequent 110-mile/80-kilometer wide crater, is assumed to have been the catalyst for the "impact winter" that wiped out the dinosaurs over a number of decades.
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Student Exploration: Determining Density via Water Displacement
Directions: Follow the instructions to go through the simulation. Respond to the questions and
prompts in the orange boxes.
Vocabulary: Archimedes' principle, density, displacement, mass, volume
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
A ship floats by an iceberg as shown.
1. Based on the picture, which object is denser, the
iceberg or the ship?
2. How do you know?
each of the following reactions shows a solute dissolved in water. classify each solute as a strong electrolyte, a weak electrolyte, or a nonelectrolyte. x(s)→x(aq) cd(aq)⇌c (aq) d−(aq) yz(s)→y (aq) z−(aq) pq(aq)→p (aq) q−(aq) r(l)→r(aq)
Each of the following reactions shows a solute dissolved in water and is classified as a strong electrolyte, a weak electrolyte, or a nonelectrolyte.
Define strong electrolyte, non-electrolyte and weak electrolyte:
The complete dissociation of a substance into ions when dissolved in aqueous solution is known as strong electrolyte.
Whereas the substance that does not isolate completely into ions is known as non-electrolyte.
On the contrary, a substance that partially dissociates into ions when dissolved in its aqueous solution is known as weak electrolyte.
(a) x(s) → x(aq)
It is a non-electrolyte as no dissociation of ions is taking place here.
(b) cd(aq) ⇌ c+ (aq) + d−(aq)
This reaction is in equilibrium state and partial dissociation of ions takes place, Thereofre, it is a weak electrolyte.
(c) yz(s)→y+(aq) + z−(aq)
This reaction is in non-equilibrium state and hence complete dissociation of ions taking place here. Thus, it is a strong electrolyte.
(d) pq(aq) → p+(aq) + q−(aq)
pq is a strong electrolyte as it dissociate complete into ions.
(e) r(l)→r(aq)
It is non-electrolyte as it does not produce ions.
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Sediments that have been cemented together become igneous rock. True or False?
Sediments that have been cemented together become igneous rock. false
The rock pieces called as sediments dropped from the wind and air to make a layer and this can be buried under other layers of sediments . after a long time sediments that have been cemented together become sedimentary rock. sedimentary rock can change into igneous rock and metamorphic rocks. sediments are pieces of solid material that have been deposited on earth surface. formation of sedimentary rocks begins when weathering and erosion produce sediments. so the statement Sediments that have been cemented together become igneous rock is a false statement.
Thus, Sediments that have been cemented together become igneous rock. false.
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PLEASE I NEED HELP, BAD!
Rank the following three transitions in the hydrogen atom in terms of lowest to highest energy, wavelength, and frequency: 8 to3, 6 to 4, 2 to 1
The ranking of the transitions from lowest to highest energy, wavelength, and frequency is;
2 to 1 6 to 48 to 3What is a transition?From the Bohr model of the atom, we know that an electron in the hydrogen atom is able to absorb a photon move from a lower to a higher energy level. This is what we refer to as the excitation of the electron in the atom.
Now we also know that the spectrum of the hydrogen atom can be explained on the basis of the fact that electrons are able to move from a lower to a higher energy level and vice versa, the energy of each of the transition is dependent on the difference between the transition.
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Which of these is the source of the energy that plant cells use for photosynthesis?
Choose the correct answer.
Responses
radiant energy from the sun
radiant energy from the sun
kinetic energy from the wind
kinetic energy from the wind
potential energy from the soil
potential energy from the soil
mechanical energy from animals
Radiant Energy from the sun is the source of the energy that plant cells use for photosynthesis. The first response is the correct answer.
Nearly all of the energy on Earth comes from the sun. Through a process known as photosynthesis, it enables plants and other organisms to convert water and carbon dioxide into sugars.
The function of sunlight in photosynthesis is to supply energy. Heat and light are two different types of energy that the sun emits.
Chlorophyll can capture energy, which can then be converted into sugar during photosynthesis. Photosynthesis slows down when a plant receives insufficient sunlight. This implies that the plant's energy source—sugar—might not be getting to it in sufficient amounts. We can clearly see how crucial sunlight is to life.
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WILL GIVE BRALINLIST
The solution to 1.56 x 65.3211 should have ____ significant figures.
Answer: 3 Figures
Explanation:
Calculate 345.009 g - 23.009 g and give your answer with the appropriate number of significant figures. 322.000 g.
there bud
Suppose a scientist wants to create a pool of rna molecules that are 40 nucleotides long and contain every possible combination of bases. What mass of rna nucleotides is needed to synthesize the pool of rna molecules?
If a scientist wants to create a pool of RNA molecules that are 40 nucleotides long and contain every possible combination of bases. The mass of RNA nucleotides needed to synthesize the pool of RNA molecules is 440 molecules of all four RNA.
All four RNA nucleotides combined will be required to create a pool of RNA molecules which containes every RNA molecule. This is due to that each position is to be occupied or filled by any of the four nucleotides which are-
Adenine (A) Thymine (T) Guanine (G) Cytosine (C).An RNA nucleotide consist of three parts, they are -
ribose sugar with five carbon, phosphate molecule, One of four nitrogenous bases such as adenine, guanine, cytosine or uracilThousands of ribonucleotides gets initiated before the process of transcription occurs and the mRNA is formed. 100,000 or more proteins in the human body are synthesized from a different RNA nucleotides.
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P4O10 + H2O —>
what are the products
Answer:
P4O10 + H2O → H3PO4
Explanation:
Construct a three‑step synthesis of 3‑bromocyclopentene from cyclopentane. Drag the appropriate items into the bins. Note that each bin should hold only one item, and not all reagents and structures will be used.
The three step for the synthesis of 3-bromocyclopentene are: bromination, reaction with tert-butoxide and at last reaction with ester.
What is 3- bromocyclopentane and how it is prepared in three steps?The first step for the preparation of 3-bromocyclopentane would be bromination : cyclopentane + Br2/hv ----------- bromocyclopentane.The second step would be reaction with potassium tert-butoxide which is obviously a base : bromocyclopentane + (CH3)3CO K+ ----------------------cyclopentene.The third step would be the reaction of cyclopentene with NBS and ROOR to give 3- bromocyclopentene.In organic chemistry we face a lot of organic compounds , some are alkanes, alkenes and alkynes out of which 3-bromocyclopentene is a synthetic compound.To know more about 3-bromocyclopentene visit:
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In the first reaction of the citric acid cycle, oxaloacetate, which contains blank______ carbons, is combined with acetyl-coa, which contains blank______ carbons in its acetyl group, to produce citric acid, which contains blank______ carbons.
Four-carbon, four-carbon, four-carbon molecule.
What is citric acid cycle?In eukaryotes, the citric acid cycle occurs in the matrix of mitochondria, as does the conversion of pyruvate to acetyl-CoA. In prokaryotes, these two steps occur in the cytoplasm. The citric acid cycle is a closed loop; the last part of the pathway re-forms the molecule used in the first step. There are eight main steps in the cycle.
In the first step of the cycle, acetyl-CoA combines with a four-carbon acceptor molecule, oxaloacetate, to form a six-carbon molecule called citrate. After a rapid rearrangement, this six-carbon molecule releases two of its carbons as carbon dioxide molecules in two similar reactions, each time releasing a molecule of NADH.
Start superscript, 1, end superscript. The enzymes that catalyze these reactions are important regulators of the citric acid cycle, speeding it up or slowing it down depending on the energy requirements of the cell^2 2
squared.
The remaining four-carbon molecule undergoes a series of further reactions that first produce a ATP molecule-or, in some cells, a similar molecule called GTP and then the electron carrier FAD to for_2FADH 2, start subscript, 2, end subscript, and finally generation of another NADH. This reaction sequence regenerates the starting molecule oxaloacetate, allowing the cycle to be repeated.
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1 2 3 4 5 6 7 8 9 10 Which point on the number line represents the product (5) (negative 2) (negative 1)? A number line going from negative 11 to positive 11. Point A is negative 10, point B is negative 2, point C is 2, point D is 10. Point A Point B Point C Point D
Point on the number line represents the product point D
Number line is the pictorial representation of number on straight line called number line
Here given data is a number line in which 10 numbers are seen and this numbers are toward right side it represent positive numbers and toward left side it represent negative numbers so here the point d represent the product and point a represent the reactant so that's why point d which represent 10 are product
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a volume of 35.60 ml of 0.2255 m sodium hydroxide was required to completely react with 19.90 ml of phosphoric acid solution. find the molarity of the phosphoric acid solution
M(molarity of the phosphoric acid solution)=0.13 mole/L
molarity is a measure of the concentration of solute in a solution.
EQUATION OF BALENCE REACTION---->
3NaOH + H3PO4 ---->Na3PO4+3H2O
n MOLE OF NaOH REQUIED n/3 MOLE OF H3PO4 to completely react.
formula required to find the molarity is
n= number of mole
M= molarity
V= volume
n=M×V
n= 0.2255 m×35.60 ml
n= 8.02 m mole.
and, mole of H3PO4 to completely react = n/3
=8.02 /3
=2.67 m mole
now, according to question-->
2.67 m mole=M×19.90 ml
concentation of the solute in phosphoric acid solution is 0.13 mole/L
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when using a water-cooled condenser, the water should choose... the condenser. to make this happen, the water should flow in at the choose... and should flow out at the choose... .
When using a water-cooled condenser, the water should constantly move over the condenser. to make this happen, the water should flow in at the bottom part and should flow out at the top part.
Water cooled condenser is heat exchanger. it will removes heat from the refringent and transfer to the water running through. The advantages of this system is it is lasts year longer. it has higher heat transfer rate
Thus, When using a water-cooled condenser, the water should constantly move over the condenser. to make this happen, the water should flow in at the bottom part and should flow out at the top part.
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Which gas will need the slowest time to get out of a gas syringe?
The gas that will need the slowest time to get out of a gas syringe is helium.
Helium is the second lightest element, and it has a low boiling point of -456°C. As such, it will take longer than any other gas to escape from a gas syringe.
Helium is a noble gas and is less reactive than other gases, so it will not react with the needle as quickly. Helium also has low conductivity, which means it takes less energy to transport helium through an object than it does for other gases. In addition, helium is odorless and tasteless, so it won't create any unwanted odors or smells when you use it in your experiments.
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independent variable and dependent variable
states with a larger population have more seats in the house of representative
Answer
Explanation:
Give the names of all of the above acids
Are animal cells prokaryotic or eukaryotic .
Are plant cells prokaryotic or eukaryotic .
Order the following regions of the EM spectrum from lowest to highest energy: infrared, microwaves, ultraviolet, visible, X-rays, gamma rays
In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
Which comes first in terms of energy, X-rays, radio waves, or microwaves?Radio waves lack the energy that microwaves do. There are even more in infrared, which is followed by visible, ultraviolet, X, and gamma rays.
In general, the electromagnetic spectrum is split into seven sections, rising in energy and frequency and decreasing in wavelength. Radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV) light, X-rays, and gamma rays are some of the popular names for these phenomena.
Radio waves, microwaves, infrared, visible, ultraviolet, X-rays, and gamma rays are the seven different forms of waves. Gamma rays have the shortest wavelength and the highest frequency, whereas radio waves have the longest wavelength and lowest frequency.
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"The higher the temperature of a gas at constant volume, the greater is its * 10 points
pressure." Which of the following kinetic-molecular explanations of this
principle is NOT correct?
O Molecules move faster at higher temperatures.
The number of molecular impacts per unit area decreases at a higher temperature.
The average kinetic energy of molecules is greater at a higher temperature.
O
The average momentum and rate of molecular collisions is greater at a higher
temperature.
The option that shows that the kinetic-molecular explanations of this principle is NOT correct is option B: The number of molecular impacts per unit area decreases at a higher temperature.
What is the kinetic-molecular theory?The assumption that matter is made up of microscopic particles that are always in motion forms the foundation of the kinetic-molecular theory, which explains the states of matter.
Therefore, based on the use of observable characteristics as well as the use of behaviors of solids, liquids, as well as gases are known to be explained by kinetic-molecular theory.
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Which of the following is an example of a heterogeneous mixture? *
a teaspoon of sucrose
a gold ring
a handful of pebbles
O a pot of salted pasta water
A pot of salted pasta water is an example of a heterogeneous mixture.
Heterogenous mixture :If a mixture's composition varies over the course of the mixture, it is said to be heterogeneous. Vegetable soup is a complex concoction. The proportions of the different vegetables and other ingredients will vary from mouthful to mouthful. Mixtures that contain two or more phases are said to be heterogeneous. Examples include ice cubes in a beverage, sand and water, and salt and oil.
What is a homogeneous mixture?A homogenous mixture is one whose composition is constant across the entire mixture. Because the soluble salt is distributed evenly throughout the whole salt water sample, the salt water described above is homogenous.
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1.What are the key components represented in the model shown in Figure 2?
2.What relationships are shown in the Figure 2 model?
1. The key component represented in the model is the Reflection of light.
2. Bouncing back of light relationships are shown in the Figure 2 model.
Reflection is when mild bounces off an item. If the surface is smooth and bright, like glass, water or polished metal, the light will reflect at the same angle as it hit the floor. This is known as specular reflection. light reflects from a clean floor on the same angle as it hits the floor.
In line with the law of reflection, the attitude of prevalence equals the perspective of reflection. To view an image of an object in a mirror, you should sight alongside a line at the photo area.
Reflection is the bouncing back of light while it moves a easy surface. Refraction is the bending of light rays whilst it travels from one medium to some other.
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If 100 mg of ferrocene is reacted with 75 mg of anhydrous aluminum chloride and 40 microliters of acetyl chloride and 100 mg of product is isolated, what is the percent yield assuming the product is only mono acetylferrocene? answer with just the number and no % sign.
Assuming that the product is only mono acetylferrocene, the percentage yield is 81.3%.
Ferrocene reacts with Acetyl chloride in the presence of anhydrous aluminum chloride to produce mono acetylferrocene.
Here, anhydrous aluminum chloride is only present as a catalyst, It does not participate in the reaction so we will not take it into our calculations.
So, in order to calculate the theoretical yield of the product let us find out the moles of ferrocene and acetyl chloride, so that we can find out on whose concentration the product is depending.
Moles = given mass of compound/molar mass of compound.
So, number of moles of ferrocene,
Molar mass of ferrocene = 186.04g.
Mass of ferrocene reacted = 100mg = 0.1g.
Moles of ferrocene = 0.1/186.04 = 0.0005373 moles.
Moles of acetyl chloride,
Volume of acetyl chloride = 40 microliters = 0.04 milliliters.
We know that,
Density = mass/volume
Density of acetyl chloride = 1.1gram per meter cube.
Mass of acetyl chloride = 1.1 × 0.04
Mass of acetyl chloride = 0.044g
Molar mass of acetyl chloride = 78.49g.
Moles of acetyl chloride = 0.044/78.49
Moles of acetyl chloride = 0.0005375
As we can see, the number of moles of ferrocene are present in less amount, so ferrocene is controlling the yield of mono acetylferrocene.
Moles of ferrocene = Moles of mono acetylferrocene.
Molar Mass of mono acetylferrocene = 228.07 g
Now,
0.0005375 = m/228.07
m = 0.0005375 × 228.07
m = 0.123 grams.
Mass of mono acetyl ferrocene formed theoretically is 0.123grams.
Experimental yield = 100mg = 0.1 grams.
Percentage yield = experimental yield/theoretical yield × 100
Percentage yield = 0.1/0.123 × 100
Percentage yield = 81.3%
So, the percentage yield of the product is 81.3%
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The separation technique you used in the investigation to make dirty water clear is
:
filtration
crystallization
sedimentation
distillation
The separation technique used to make dirty water clear is filtration.
Filtration is a separation technique that uses a funnel lined with filter paper to hold the solids while allowing the liquid to pass through, separating the components of a combination that contains an undissolved solid in a liquid. Filtration can be carried out cold or hot, under vacuum or by gravity, and with either a Buchner or Hirsch funnel or a straightforward glass funnel. Whether a solid is to be isolated from a mixture or pollutants are to be removed, the precise technique utilized depends on the goal of the filtration.
In the given question it is mentioned that the water is muddy then the one first method to separate is filtration after this it can be followed by distillation by which we can get pure water from it.
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How does quantum theory relates to Nanoparticles in Medicine please provide as much info as possible need help ASAP
Certain metal-based nanoparticles have the potential to interact with the hydrogen peroxide found in every cell and change it into a hydroxyl radical that can enter the nucleus and cause DNA damage.
What purposes do nanoparticles serve?Scratch-resistant eyewear, crack-resistant paint, anti-graffiti coatings for walls, transparent sunscreen, stain-repellent fabrics, self-cleaning windows, and ceramic coatings for solar cells are all products made with nanoparticles today.
Where can one find nanoparticles?In addition to living matter, naturally produced nanoparticles can also be found in volcanic ash, ocean spray, fine sand, and dust (e.g. viruses). The diversity of synthetic nanoparticles is on par with that of its counterparts in nature, if not greater.
Are nanoparticles accepted by the FDA?The usage of nanoscale materials in medications, medical devices, biologics, cosmetics, and food is anticipated to rise significantly in the coming years, according to the FDA, which has already assessed and authorized a few nanotechnology-based items.
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Tasha and Marco examine a cell through a microscope. Tasha suggests that the cell is a protist. Marco thinks it might be a bacterium. What evidence would prove Tasha right?
The evidence that might prove Tasha is right if she and Marco examine a cell through a microscope and Tasha suggests that the cell is a protist is the presence of organelles and cell nucleus.
What is a eukaryotic cell?A eukaryotic cell such as observed in protists contains organelles and a cell nucleus where the genetic material is found compartmentalized, conversely to bacteria which are prokaryotic cells that do not contain a cell nucleus nor membrane-bound organelles.
Therefore, with this data, we can see that eukaryotic cells contain cell nuclei and organelles.
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If the density of an unknown liquid is 2.6g/mL, what is the mass of 800mL of the unknown liquid
in grams (g)?
The mass of unknown liquid is 2080g.
Let us take formula for calculating density
Density = [tex]\frac{mass}{volume }[/tex]
therefore , mass = [tex]density\times volume[/tex]
= [tex]2.6\times 800[/tex]
= 2080 g.
What is mass?The mass is a quantitative measure of inertia in physics, a fundamental property of all matter. It is actually the resistance that a body of matter offers to change its speed or position under the influence of a force. The greater the mass of the object, the smaller the change caused by the force applied to it. In the International System of Units (SI), the unit of mass is the kilogram, which is defined as Planck's constant, which is defined as Planck's constant, which is equal to 6.62607015 × 10–3 joules per second. One joule equals one kilogram times one square meter per second.
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what is the hybridization about a central atom that has three total electron groups, with two of those being bonding groups and one being a lone pair?
The shape becomes bent V-shaped AND, molecular geometry is a triangular planar shape.
In the hybridization model, the number of hybrid orbitals used by the central atom is the same as the number of electron groups around the central atom. Thus, 2 electron groups (linear) = sp hybridization
If there are only three total electron groups, holding the place where two of those are bonding groups and one is a lone pair. then the shape becomes bent V-shaped, 2 bonds and 1 lone pair the shape is bent. For sp² hybridized central atoms the only possible molecular geometry is a triangular planar shape.
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here’s another question for you: at room temperature, liquid water has a density of about 1 g/cm3, while that of liquid mercury is about 13.6 g/cm3. check all of the ways that the molecular model could account for the difference.
Mercury's molecules have more mass, Mercury's molecules are spaced closer together
We can argue that density is directly related to mass since density is defined as the ratio of an object's mass to its volume, i.e., the higher an object's mass, the higher its density. Mercury's density will be higher than that of liquid water since it has a higher mass than that of water. Since the molecules of mercury are more tightly spaced from one another than those of a liquid, the latter's molecules exhibit lower forces of attraction. Because an object's force of attraction is directly inversely proportional to its mass, the stronger the force of attraction, the larger the mass, which results in a high density.
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