As per the pictorial representation,the first image is of an element while the second one is that of a mixture of an element and a compound.
What is an element?
It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.
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(WILL TRY TO GIVE BRAINLY!!!!!!!)
Courtney burns wood in an outdoor firepit. She measures the mass of the ashes that remain after the fire, and the mass is much lower than the wood that she burned. What would be the best explanation for what Courtney observes?
A. gases are released into the air
B. water inside the wood solidifies
C. heat caused the molecules to lose density
D. atoms in the wood are destroyed
Answer:
When wood is burned, it undergoes a chemical reaction called combustion, which produces heat, light, and various gases such as carbon dioxide, water vapor, and nitrogen oxides. These gases are released into the air, leaving behind a residue of ash that is much lighter than the original wood. Therefore, option A is the best explanation for what Courtney observes.
-Guys I need help asap pls someone
How can acetaminophen cause liver damage
Dr. Ke-Qin Hu, a well-known expert in liver disease and director of UCI Health Liver and Pancreas Services, warns that taking or more four grams of acetaminophen in a 24-hour period could result in severe harm.
How do I find out if my liver is healthy?Proteins, liver enzymes, & bilirubin are just a few of the things that a liver blood test analyzes in your blood. This can aid in examining the condition of your liver and looking for indications of inflammation of damage. Infections with the liver, such as hepatitis B and C, can have an impact on your liver.
What foods promote the restoration of the liver?There are numerous nutrients that include certain elements or antioxidants that have been demonstrated to support liver function. The following are a few examples: grapefruit, berries, cranberries, fatty salmon, olive oil, even cruciferous vegetables as broccoli or Brussels sprouts.
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What is the molarity of a 0.5L sample of a solution that contains 60.0 g of sodium hydroxide (NaOH)
Answer:
3 mol/L
Explanation:
Molarity = No. of moles of solute/Volume of solution in L
which metals are better at making cations and which are better staying neutrual
Cations are formed when impartial atoms lose electrons, which are then transferred to other atoms. The resulting cation is positively charged. For example, this manner is accountable for the advent of sodium chloride, better recognized as table salt. The sodium atom loses an electron, forming a sodium cation.
What kind of issue are most in all likelihood to shape cations?metals
This is absolutely one of the chemical houses of metals and nonmetals: metals have a tendency to shape cations, whilst nonmetals have a tendency to structure anions.
Which metallic is succesful of forming more than one cation?Most transition metals vary from the metals of Groups 1, 2, and 13 in that they are capable of forming more than one cation with distinct ionic charges. As an example, iron frequently types two unique ions.
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(NEED HELP ASAP) Which statement is true about the particles of a solid when the solid changes into a liquid?
-They stop vibrating.
-Their kinetic energy increases.
-They move closer to each other.
-The attractive force between them increases.
When a solid changes into a liquid, the particles of the solid move farther apart and gain kinetic energy. Therefore, the statement that is true about the particles of a solid when the solid changes into a liquid is: their kinetic energy increases.
What is Kinetic Energy?
It is a scalar quantity and is dependent on the mass and velocity of an object. The formula for kinetic energy is:
Kinetic energy = (1/2) * mass * velocity^2
In a solid, the particles are tightly packed and vibrate in a fixed position. When the solid is heated or the pressure is reduced, the kinetic energy of the particles increases and they begin to vibrate faster and move slightly away from their fixed positions. This causes the solid to start melting and the particles begin to slide over each other, forming a liquid. Therefore, the particles of the solid move apart and gain kinetic energy when the solid changes into a liquid.
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Use the equation for Charles’s Law to calculate the following. (2pts)
A plastic bottle is filled with a gas to the volume of 0.50 L at a temperature of 294.15K. The bottle then placed in a freezer for 24 hours at a temperature of 273.15K.
What is the volume of gas inside the plastic bottle when it is taken out of the freezer?
Answer:
670,385k
Explanation:
Potassium chlorate (KClO3) will decompose to potassium chloride (KCl) and oxygen (O2) in the reaction shown:
2KClO3(s) → 2KCl(s) + 3O2(g)
A chemist allows 20.0 grams of KClO3 to decompose and captures 6.7 grams of O2 as a
result.
Answer:
Explanation:
Theoretical yield is 7.9 g O2
% yield is actual/theoreticalx 100 = 6.7/7.9 X 100= 84.81 % O2
If 500. g of magnesium chloride is produced in the above reaction, how many grams of hydrogen gas would be produced?
If 500 g if magnesium chloride are created, the reaction described above would result in 8.23 grams of hydrogen gas.
What is the benefit of magnesium chloride?To prevent and cure low levels of magnesium inside the blood, this drug is a mineral supplement. The symptoms of having too much stomach acid, such as indigestion, heartburn, and stomach discomfort, are also treated with some brands.
Molar masses of MgCl2 are calculated as follows: moles od MgCl2 = mass of MgCl2 / (24.31 g/mol Plus 2(35.45 g/mol))
Moles of MgCl2 are equal to 4.07 mol, and the mass of H2 is equal to 4.07 mol times the molar mass of H2, or 2.02 g/mol, for a total mass of 8.23 g.
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Which of the following is false?
The orbits defined in the Bohr model of an atom for atoms in the first and second period. But, beyond those atoms, the model no longer is appropriate.
The dual nature of an electron prevents simultaneously knowing both the exact location and the velocity of the electron.
The Schrödinger equations take into account the dual nature of an electron to define regions in space where electrons have a high probability of being located.
The more precisely the location of an electron is known, the less precisely the velocity is known.
Answer:
B is the false one
hope it helps u u u BRAINLIST
Turns moist red litmus paper blue?
Answer: No, moist red litmus paper does not turn blue.
Explanation:
Now write the formulas of TWO compounds we can investigate--one that has an
element substituted for H, and one that has an element substitute for O. Write the
formulas separate by a comma, like this: X20, H2X
The term chemical formula is also called the molecular formula of a compound which represents the total number of atoms of each constituent elements present in one molecule of the compound.
What is chemical formula?The chemical formula is defined as the symbolic representation which gives the chemical composition of a compound. They also denotes the ratios in which the constituent elements combine to form the compound.
The chemical formula of a compounds with an element hydrogen are HCl, NH₃, HNO₃, etc. whereas the chemical formula of the compounds with an element 'O' are H₂O, H₂O₂, OH⁻, etc.
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In what way can we play our role in the field of science? (as a student)
Why we need to use the archetorien principle in lab report
This principle is important in laboratory reports because it can be used to determine an object's or material's density, which is an important physical property used in many applications.
The Archimedes' principle is a fundamental physics principle that states that the buoyant force acting on an object submerged in a fluid equals the weight of the fluid displaced by the object. It is critical to use the Archimedes' principle in a lab report to accurately and precisely determine the density of the object or material being studied. This principle provides a dependable and accurate method for calculating density, which is useful in many scientific and engineering fields. By including the Archimedes' principle in a lab report, you show that you considered all relevant factors and used appropriate methods to determine the physical properties of the materials being studied.
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A student mixed 24.5 g of magnesium bromide with 8.67 x 1022 molecules of hydroiodic acid... They recovered 8.23 g of acid. What is the percent yield?
Explanation:
Refer to pic............
HELP ME PLSSSS!!!!!!!
You build a circuit to power a hot plate. The hot plate can quickly heat up and boil a pot full of water. You add a second hot plate to the same circuit. Both plates heat up, but neither plate gets hot enough to boil water. Explain why the modified circuit can no longer boil water. (1 point)
O The hot plates use electrical energy to generate heat. By adding a second hot plate, you have made an open circuit. This means the path of electricity from the energy source to the hot plates is interrupted.
O The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, both loads must be broken.
O The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, the energy source of the modified circuit must be broken.
O The hot plates use electrical energy to generate heat. When a second load is added, electrical energy from the circuit is now shared between two hot plates. This means each hot plate receives less electrical energy and cannot generate as much heat.
The modified circuit can no longer boil water because: "The hot plates use electrical energy to generate heat. When a second load is added, electrical energy from the circuit is now shared between two hot plates.Therefore, the correct option is D.
What is electrical energy?Electrical energy is a form of energy that results from the movement of charged particles, such as electrons. It is the energy that is transferred when an electric current flows through a conductor, and can be converted into other forms of energy, such as heat, light, or mechanical energy.
When a second load is connected, the circuit's electrical power is now split between two hot plates. Because of this, each hot plate uses less electricity and cannot produce as much heat.Therefore, the correct option is D.
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The question is incomplete, but most probably the complete question is,\
You build a circuit to power a hot plate. The hot plate can quickly heat up and boil a pot full of water. You add a second hot plate to the same circuit. Both plates heat up, but neither plate gets hot enough to boil water. Explain why the modified circuit can no longer boil water. (1 point)
A. The hot plates use electrical energy to generate heat. By adding a second hot plate, you have made an open circuit. This means the path of electricity from the energy source to the hot plates is interrupted.
B. The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, both loads must be broken.
C. The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, the energy source of the modified circuit must be broken.
D. The hot plates use electrical energy to generate heat. When a second load is added, electrical energy from the circuit is now shared between two hot plates. This means each hot plate receives less electrical energy and cannot generate as much heat.
4. Plant cells have large, round vacuoles they primarily use for-
Plant cells have large, round vacuoles they primarily use for water storage so that will be option A.
A vacuole is a membrane-bound organelle found in plant, fungus, and animal cells, as well as certain protist, animal, and bacterial cells. Vacuoles are simply confined compartments filled with water holding inorganic and organic molecules in solution, including enzymes, while in certain situations they may also include solids that have been absorbed.
Vacuoles are generated by the fusing of several membrane vesicles and are just bigger versions of these. The organelle has no fixed form or size; its structure changes depending on the needs of the cell.
The role and relevance of vacuoles vary substantially depending on the kind of cell in which they are found, with plants, fungi, and some protists having far more prominence than animals and bacteria. In general, the vacuole performs the following functions:
Isolating materials that might be toxic or pose a risk to the cellstoring waste productsWater storage in plant cellsLearn more about Vacuoles:
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Complete question:
Plant cells have large, round vacuoles they primarily use for -
A) water storage
B) energy production.
C) protein synthesis.
D) waster removal
How would I justify if it’s accurate or precision
a. The measurements on the target do not represent accuracy well.
b. The measurements on the target represent precision fairly well.
What qualifies as accuracy and precision?Accuracy refers to the closeness of a measurement to the true or accepted value. Since they are off target, the measurements are not accurate.
Precision refers to the consistency and reproducibility of measurements, and in this case, the shots are clustered around certain areas, with two points in the second circle and two points in the third circle. This indicates that the person taking the shots was able to consistently hit a certain area.
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Predict what will happen to reaction rates in the following scenarios and explain why!
1. You add more oxygen gas to rusting iron metal (Note: Iron + Oxygen- →rust).
this reaction rate will...
2. You put a beaker of reacting nitric acid and sodium hydroxide into the refrigerator. This reaction rate will...
In the following chemical changes in case of rusting of iron reaction rate will increase while in case of nitric acid and sodium hydroxide into the refrigerator , reaction rate will decrease.
What are chemical changes?Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
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If 310.71 grams of 02 are produced, how many grams of Hg will also be produced
The answer to this question depends on the reaction that is taking place.
What is reaction?Reaction is the process of responding to a stimulus. It is an instinctive response to an event, person, object, or situation. It can be conscious or unconscious, rational or irrational. Reactions can be physical (e.g. facial expressions, body language, etc.) or mental (e.g. thoughts, feelings, beliefs, attitudes, etc.). Reactions can vary from person to person, depending on the individual's beliefs and experiences. Reaction is often used to evaluate the success of a stimulus or to measure the intensity of a response.
If the reaction involves the combination of Hg and O2, then the amount of Hg produced will be the same as the amount of O2 produced, which in this case is 310.71 grams. However, if the reaction involves the decomposition of HgO2, then the amount of Hg produced will be twice the amount of O2 produced, which in this case would be.621.42 grams.
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The density of a gaseous organic compound is 340g/L at 45°C and 1.7atm. what is it's mole
To determine the number of moles of the gaseous organic compound, we can use the ideal gas law equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
How to calculate ?First, we need to convert the density to mass per volume. The density of the gas is given as 340g/L. Therefore, the mass of 1 L of the gas is 340 g.
Next, we need to use the ideal gas law to calculate the number of moles. We know that the pressure is 1.7 atm, the temperature is 45°C (which is 318 K), and the volume can be calculated using the density and the molar mass of the compound. The molar mass can be determined from the molecular formula of the compound.
Assuming the compound is a hydrocarbon, we can use an average molar mass of 28. Thus, the volume of 1 mole of the gas can be calculated as follows:
V = (molar mass/density) × 1000 ml/L = (28/340) × 1000 = 82.35 ml/mol
Using the ideal gas law equation and plugging in the given values, we get:
n = (PV) / (RT) = (1.7 atm × 82.35 ml) / (0.0821 L atm/mol K ×318 K) = 0.839 mol
Therefore, the number of moles of the gaseous organic compound is 0.839 mol
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Question 5
Calculate the wavelength (in nm) of a neutron traveling at a speed of 85.0 m/s. The mass of a neutron is 1.67493 × 10–24 g.
1 point
4.65 nm
8.58 nm
4.96 × 10–3 nm
5.78 × 10–3 nm
The wavelength of the neutron is 4.65 n. Wavelength is typically measured in units of meters (m), centimeters (cm), or nanometers (nm).
What is Wavelength?
Wavelength is the distance between successive crests, troughs, or any other equivalent points in a wave. It is usually denoted by the Greek letter lambda (λ) and is commonly used to describe electromagnetic waves, such as light, as well as other types of waves, including sound and water waves.
Since the wavelength of a neutron is given by λ = h/p, where h is Planck's constant and p is the momentum of the neutron, we can calculate the wavelength using the equation λ = h/mv, where m is the mass of the neutron, v is its velocity, and h is Planck's constant.
First, we need to convert the velocity from m/s to cm/s, since the units of h are cm^2 g/s:
85.0 m/s × (100 cm/1 m) = 8500 cm/s
Next, we can plug in the values for m, v, and h:
λ = h/mv = (6.626 × 10^-27 cm^2 g/s)/(1.67493 × 10^-24 g × 8500 cm/s)
λ = 4.65 nm
Therefore, the wavelength of the neutron is 4.65 nm.
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How do you think improving technology to identify locations of fossil fuels could benefit people and the environment?
If a product's food label indicates it contains 80 calories per serving, and you consume three servings, how many calories did you consume?
Answer: 240 would be the correct answer (a)
Explanation: so there are 80 calories per serving and you consume 3 servings you would consume 240, so 3x80=240
Please someone explain me this
1 and 2 are oxidation reactions.
What is an oxidation reaction?
An oxidation reaction is a type of chemical reaction that involves the transfer of electrons from one substance to another. Oxidation reactions are characterized by an increase in the oxidation state of a molecule, atom, or ion, resulting in a loss of electrons.
The substance that loses electrons is said to be oxidized, while the substance that gains electrons is said to be reduced.
Oxidation reactions play important roles in many chemical and biological processes, including energy production, metabolism, and corrosion.
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Which statement describes the formation of galaxies?
They begin in nebulas.
Heat and gases contract.
Gravity causes stars to cluster.
Dust and gases contract.
The statement "Gravity causes stars to cluster" describes the formation of galaxies. Galaxies are vast collections of stars, gas, and dust held together by gravity.
What is gravity?
A fundamental force in the cosmos that draws things together is called gravity. All objects with mass are attracted to one another because to this force, which also keeps the planets in their orbits around the sun.
Einstein's theory of general relativity, which asserts that matter warps space-fabric time's and creates a gravitational field that causes objects to travel along curved pathways, is used to explain gravity. The mass of the objects and the separation between them determine the gravitational force's strength; bigger masses and closer separations provide a stronger gravitational pull.
The statement "Gravity causes stars to cluster" describes the formation of galaxies. Galaxies are vast collections of stars, gas, and dust held together by gravity. The formation of galaxies is a complex process that involves the gravitational collapse of a large cloud of gas and dust, leading to the formation of stars and the clustering of those stars into galaxies. This process is influenced by various factors, including the initial conditions of the gas cloud, the amount of dark matter present, and the interactions between galaxies.
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Galaxies are created as a result of the phenomenon known as star clustering due to gravity.
What is Gravity?
Gravity is a fundamental force of nature that causes physical objects to attract each other. It is the force that causes objects with mass to be drawn towards each other. Gravity is a universal force that affects all objects with mass, no matter how small or large they are. The strength of gravity depends on the mass of the objects involved and the distance between them. The force of gravity was first described by Sir Isaac Newton in his law of universal gravitation, and it was later refined by Albert Einstein's theory of general relativity. Gravity plays a fundamental role in shaping the structure of the universe, from the smallest particles to the largest structures such as galaxies and clusters of galaxies.
Galaxies are formed when gravity pulls together vast clouds of gas and dust, causing them to collapse and form stars. Over time, these stars cluster together to form galaxies. The other statements also describe various aspects of star and galaxy formation, but the statement that best describes the formation of galaxies is the one about gravity causing stars to cluster.
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If 10 J of heat is added to 2 g of gold, how much does the temperature increase? The specific heat of gold is 0.129 J/(g·°C)
Answer:
you can use the formula for heat capacity to calculate the change in temperature:
Q = m * c * ΔT
where Q is the heat added, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.
Plugging in the values given, we get:
10 J = 0.002 kg * 0.129 J/(g·°C) * ΔT
Simplifying and solving for ΔT, we get:
ΔT = 10 J / (0.002 kg * 0.129 J/(g·°C))
ΔT = 308.53 °C
Therefore, the temperature of the gold increases by approximately 308.53 °C when 10 J of heat is added to 2 g of gold.
Balance the following chemical reactions.
a. ____ Na2CO3 (s) + ____ HCl (aq) → ___ NaCl (aq) + ____H2O (l) + ____ CO2 (g)
b. ____ NaBr (aq) + ____ Ca(OH)2 (aq)→___ CaBr2 (aq) + ____ NaOH (aq)
c. ____ NH3 (g) + ____ H2SO4 (aq)→____ (NH4)2SO4 (aq)
d. ____ C5H9O (l) + ____ O2 (g)→____ CO2 (g) + ____ H2O (l)
Answer:
a. Na2CO3 (s) + 2HCl (aq) → 2NaCl (aq) + H2O (l) + CO2 (g)
b. 2NaBr (aq) + Ca(OH)2 (aq)→ CaBr2 (aq) + 2NaOH (aq)
c. 2NH3 (g) + H2SO4 (aq)→ (NH4)2SO4 (aq)
d. 4C5H9O (l) + 27O2 (g)→ 20CO2 (g) + 18H2O (l)
Explanation:
a. Na2CO3 (s) + 2HCl (aq) → 2NaCl (aq) + H2O (l) + CO2 (g)
b. 2NaBr (aq) + Ca(OH)2 (aq)→ CaBr2 (aq) + 2NaOH (aq)
c. 2NH3 (g) + H2SO4 (aq)→ (NH4)2SO4 (aq)
d. 4C5H9O (l) + 27O2 (g)→ 20CO2 (g) + 18H2O (l)
How many moles of KNO3 would have to be added to 100g of water to form a saturated solution at 10C?
According to the solubility graph of KNO₃, 0.160 moles would have to be added to 100 g of water to form a saturated solution at 10°C.
What is solubility?Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.
At 40°C 67 g potassium nitrate is soluble thus at 10°C 10×67/40= 16.25 g is soluble which is 16.25/101.10= 0.160 moles.
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what is the molarity of a solution that contains 6.71 moles of solute in 23.5 L of solution
M=6.71mol2L=2. 5mol/L. 23.5 m o l / L . Hence, the correct that is 2.5M is the molarity of a solution that contains 6.71 moles of solute in 23.5 L of solution
What is the solute's molality in the solution?A solution's molality (m) is defined as the moles of solute divided by the kilograms of solvent. A "one-molal" solution of sodium chloride is one that comprises 1.0mol of NaCl dissolved in 1.0kg of water. Molality is represented by an italicized lower-case m.
A solution's molality equals the moles of solute divided by the mass of solvent in kilograms, whereas its molarity equals the moles of solute divided by the volume of solution in liters.
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How many grams of ice at −15◦C must be
added to 30 grams of water at 45◦C to result
in ONLY liquid water at exactly 0◦C?
1. 17.0 g
2. 13.7 g
3. 15.5 g
4. 19.2 g
5. 21.1 g
Explanation:
Refer to pic...........
.