A phase transition means change of one phase of matter into another.
Solid, liquid and gas are the three states of matter. Matter is interconvertible in nature.
The three phases of transition of matter are: melting, freezing and evaporation. These transition processes take place due to absorption and release of energy.
In the melting process, solid ice melts into liquid water due to absorption of energy.
In the freezing process, energy is released by liquid water which gives rise to the formation of solid ice.
In the process of evaporation, energy is released by liquid water , which results in the formation of water vapour.
To know more about phase transition here
https://brainly.com/question/3255181
#SPJ4
What chemical species is missing in the net ionic equation
Zn (s) + Cu2+ (aq) → Zn2+ (aq) + Cu (s)
The chemical species that is missing from the net ionic equation is the number of electrons.
What is the missing chemical species?We know that what we have in this case is a redox reaction. When we talk about a redox reaction we are talking about the kind of reaction where reduction and oxidation are both taking place at the same time. This implies that one of the species would accept the electrons and one of the species would donate the electrons.
Having said this, if we look at the reaction equation as it has been written, we can see that the specie that is missing here is the number of electrons that have been lost or gained in the course of the reaction as it has been written here.
We can only be able to infer this from the charges that the species that we can see in the reaction equation are carrying.
Learn more about net ionic equation:https://brainly.com/question/22885959
#SPJ1
List at least 3 structural properties of molecules that were not accurately represented by the model kits.
Molecular models are classified into three types: ball-and-stick, skeleton, and space-filling. For tiny compounds, the depiction of bond angles is quite precise, and the visualisation of molecular structure is good.
What characteristics do molecular compounds have?At normal temperature, most molecular compounds are gases or liquids, and those that are solids are soft and malleable. They have low melting and boiling temperatures, are poorly soluble, and are poor electrical conductors.
The attribute of the d n, a that cannot be proven using the model is the one type of structure that allows the atom to replicate itself, the amid cell division, thus the d n a contains two buiopolymers and two buiopolymous trans, which are known as poly Nucleotides.
Learn more about Molecular models refer
https://brainly.com/question/6363127
#SPJ4
I'm not too sure on this question: Give a balanced chemical equation for solid aluminum reacting with aqueous hydrogen monofluoride to produce aqueous aluminum fluoride and hydrogen gas.
Help would be much appreciated! :D
The balanced reaction equation is given as;
[tex]2Al + 6HF(aq) ------- > 2AlF_{3} (aq) + 3H_{2} (g)[/tex]
What is the balanced chemical reaction equation?We know that a chemical reaction has to do with the interaction between the reactants which would lead to the formation of the products. We know that one of the rules that govern a chemical reaction is that a reaction equation would be said to be balanced if the number of the atoms of each of the elements on the reactants side is the same as the number of the atoms on the products side.
The balanced reaction equation of the reaction between solid aluminum reacting with aqueous hydrogen monofluoride to produce aqueous aluminum fluoride and hydrogen gas has been shown above.
Learn more about reaction equation:https://brainly.com/question/3588292
#SPJ1
The Kw for water at 0 ∘C is 0.12×10^−14. Calculate the pH of a neutral aqueous solution at 0 ∘C.pH=Is a pH=7.25 solution acidic, basic, or neutral at 0 ∘C?a. acidicb. basicc. neutral
Since the pH of solution is 7.25 , this solution will be little basic in nature, Hence option B is correct
.
Chemistry uses a quantitative scale known as pH to categorize substances as acidic, basic, or neutral. Acidic substances are those that have a pH value lower than 7. For instance, acidic foods like vinegar, tamarind, lemon, etc. More than 7 means that the substance is basic in nature. Basic components like baking soda, limewater, ammonia, etc. are only a few examples. Contrarily, substances with a pH value of 7 are neutral in nature since they fall into neither the basic nor the acidic categories. such as pure water.
Hydrogen potential is referred to as pH. Highly potent bases can have a level more than 14, while extremely potent acids can have a level lower than 0.
To know more about pH ,please refer:
https://brainly.com/question/172153
#SPJ4
determining the molar mass of a gas (36 points) trial 1 trial 2 (if needed) volatile liquid used expected molar mass of volatile liquid (g/mol) mass of flask, foil and rubber band (g) mass of flask, foil, rubber band and condensed liquid (g) mass of condensed liquid (g) * volume of flask, in liters (l) barometric pressure (mmhg) atmospheric pressure (atm) * temperature of boiling water (k) experimental molar mass of unknown liquid (g/mol) * percent error*
1 = Make a list of the known quantities and formulate the issue.
2 = n=PVRT=0.987atm×0.677L0.08206L⋅atm/K⋅mol×296K=0.0275mol. Get the molar mass now by dividing g by mol.
The molar mass of a gas at STP can be determined in what way?At STP, the molar volume of a gas (22.4 liter/mole) and molar mass (22.4 lb/mole) are employed in the calculation D=M/V. Remember the Avogadro Principle for Gases (1811), which states that equal volumes of all gases under the same conditions contain the same amount of molecules.
The molar gas equation is what?PV = nRT, where n is the number of moles of the given gas, P is the gas's pressure, V is its volume, T is its absolute temperature, and P is the gas's volume.
To know more about molar mass visit:-
https://brainly.com/question/12127540
#SPJ4
How do you find the density of air at STP?
At STP, the air has a density of 0.0013 g/ml. Mass is measured by density. Density is calculated as d = mass/volume.
The abbreviation STP stands for standard temperature pressure. The best practice is to describe the standard and write out the precise conditions for each measurement because different industries and applications utilise different STP values. Records can be kept clear by stating the temperature and pressure parameters for each readout, inspection, and process. Although pure water vapour cannot exist at STP, a theoretical estimate for water vapour density at STP can be calculated using these dry air density data. Theoretically, 100% water vapour would have a density of 0.7618 kg/m3 or 62.19% of the density of dry air since pure water vapour has a density of 62.19%.
To learn more about STP click here https://brainly.com/question/29356493
#SPJ4
People who have eaten fish containing ciguatoxin can become very ill. Suggest why eating carnivorous fish is more likely to make you ill than eating herbivorous fish.
Answer:
Fish that are carnivorous, or meat-eating, are more likely to contain harmful substances such as ciguatoxin because they feed on other fish that may have already accumulated the toxin. Herbivorous fish, on the other hand, feed on plant matter and are less likely to have accumulated harmful substances from their diet. This is because toxins tend to accumulate in the fatty tissues of animals, and carnivorous fish have a higher fat content than herbivorous fish. Additionally, carnivorous fish are typically higher up on the food chain, which means that they may have eaten several other fish that have accumulated toxins, further increasing the concentration of toxins in their tissues.
Explanation:
an open-end mercury manometer, like the one shown here, is used to measure the pressure of an enclosed gas. what is the pressure of the enclosed gas if the mercury in the arm attached to the gas container is 354 mm higher than the arm open to the atmosphere and the atmospheric pressure is measured to be 0.975 atm?
The pressure of gas in a container is measured using a manometer with a tolerance of 0.509 atm. The pressure of an enclosed gas is measured using an open-end mercury manometer, like the one in this image.
However, unless clearly stated otherwise, a U-shaped tube that is partially filled with fluid is what is typically meant when using the term "manometer." To demonstrate how air pressure affects a liquid column in a laboratory experiment, you can quickly construct this kind of manometer. A manometer is a gauge used in science to measure pressure. The fourth and most basic state of matter is gas (the others being solid, liquid, and plasma). A pure gas might contain a single atom (e.g. a noble gas like neon).
The pressure of gas in a container is measured using a manometer is
(354*0.975 )- 344.65 = 0.509 atm.
Learn more about pressure here
https://brainly.com/question/15110960
#SPJ4
A manometer with a tolerance of 0.509 atm is used to measure the pressure of gas in a container.
However, The open-tube manometer is a U-shaped tube that is partially filled with fluid, usually mercury or water. Which is commonly intended when using the term "manometer" unless it is specifically indicated otherwise. This form of manometer can be easily built to demonstrate how air pressure influences a liquid column in a laboratory experiment. The pressure that is measured is related to the difference in height of the fluid at the two ends of the U-shaped tube.
Finally pressure of gas in a container is measured using a manometer is
(354×0.975 )- 344.65 = 0.509 atm.
Learn more about pressure:
https://brainly.in/question/4605642
#AAA
Students in chemistry class have been given the assignment to use flame test emission data to determine the identity of an unknown substance. When the students put a sample of the unknown compound in the flame, blue and green colors were visible. What could be one explanation for these results?.
One explanation for the vision of blue and green colors in the flame when students in chemistry class used this test to determine the identity of an unknown substance is that the sample contains barium and copper (I).
What is the flame test?It is an analytical method used in chemistry to identify the presence of certain elements, mainly metal ions.
The principle of this test is based on the characteristic emission spectrum of each element, although the color of the flame can also vary due to temperature.
Learn more about chemical testing of metals at https://brainly.com/question/28650063
#SPJ4
In this chemical equation, why is the number of atoms the same on each side of the arrow? chemical reactions reduce matter but create energy. Chemical reactions produce new matter. Matter cannot be created or destroyed.
Matter can neither be created nor destroyed.
4Fe + 3O₂ → 2Fe₂O₃
Because this chemical equation complies with the rule of conservation of matter, there is the same number of atoms on both sides of the arrow.
The law of conservation of matter states that matter can neither be created nor destroyed. It just changes into different forms. Or in accordance with this law, the total mass of the products and reactants stays identical during any physical or chemical change. Therefore, it's crucial to maintain the same number of moles on both sides of the chemical reaction in order to uphold the rule of conservation of matter.
Find more on matter-related problems at : brainly.com/question/6466221
#SPJ4
Even though your question is incomplete, I believed you were referring to this type of question:
4Fe + 3O₂ → 2Fe₂O₃
In this chemical equation, why is the number of atoms the same on each side of the arrow?
a. Chemical reactions reduce matter but create energy.
b. Chemical reactions produce new matter.
c. Matter can neither be created nor destroyed.
a 525.6 ml sample of carbon dioxide was heated to 351 k. if the volume of the carbon dioxide sample at 351 k is 774.9 ml, what was its temperature at 525.6 ml?
The temperature at 525.6ml is 236.52k
what is Charles law?
Assuming that the gas's pressure remains constant, the volume of a given mass of gas is precisely proportional to its absolute temperature. According to Charles' Law, a given amount of gas expands to a larger volume at constant pressure by a factor of 1/273 for every degree the temperature rises.
The formula for the relationship between volume and temperature is
V1 / T1 = V2 / T2, where V1 and T1 represent the starting volume and the absolute temperature, and V2 and T2 represent the end volume and the absolute temperature (the Kelvin temperature, not the Celsius temperature).
V1/T1 = V2/T2
V1= 525.6ml
T1= unknown
V2= 779ml
T2=351k
T1 =V1*(T2/V2)
= 525.6ml * (351/779)
=525.6*0.450
=236.52k
To learn more about Charles law https://brainly.com/question/16927784
#SPJ4
Water and dissolved minerals are conducted from the roots to the stems and leaves via ___________, whereas sugar is conducted through specialized cells known as _____________
Water and dissolved minerals are conducted from the roots to the stems and leaves via xylem tissue, whereas sugar is conducted through specialized cells known as seive.
Xylem tissue carries water and inorganic nutrients from the soil to plant roots and stems. It consists of elongated cells with pointed ends called tracheids and shorter and wider cells called vascular elements. The walls of these cells are woody and have wall openings called pits.
Xylem transports and stores water and water-soluble nutrients in vascular plants. The phloem is responsible for the transport of sugars, proteins, and other organic molecules in plants. Vascular plants can grow taller than others due to the rigidity of the xylem cells that support the plant.
Read more about xylem:
//brainly.com/question/14197052
a 0.8870-g mixture of sodium chloride and potassium chloride is dissolved in water and silver nitrate is added. the agcl that precipitates has a mass of 1.913 g. calculate percent by mass of potassium in the initial mixture.
Percent by mass of potassium in the initial mixture: 29.8%
solution:
1.913 gm AgCl = mass / molar mass = 1.913 / 143.32 = 0.0133 mole.
let x gm KCl and (0.8870 - x) gm NaCl.
x gm KCl = x / 74.55 mole.
(0.8870 - x) gm NaCl = (0.8870 - x) / 58.5 mole.
x / 74.55 + (0.8870 - x) / 58.5 = 0.0133
x + 1.274 * (0.8870 - x) = 0.0133 * 74.55
x + 1.274 * (0.8870 - x) = 0.9915
0.274 x = 0.1385
x = 0.506 gm
so mass of KCl = 0.506 gm
0.506 gm KCl contains = 39 * 0.506 / 74.55 = 0.265 gm potassium.
% of K = 0.265 * 100 / 0.8870 = 29.8 %
Molar mass:
In chemistry, the molar mass of a compound is defined as the mass of a sample of that compound divided by the amount of substance. This is the number of moles in that sample measured in moles. Molar mass is a mass, not a molecule, a property of matter.
learn more about moles here:
https://brainly.com/question/15356425
#SPJ4
Four solutes are added to a solvent. All solutes have the same mass and solubility. The surface areas of four solutes are 2 mm2, 4 mm2, 6 mm2, and 10 mm2. Which solute will dissolve the quickest? 2 mm24 mm26 mm210 mm2.
Of the four solutes added to a solvent, the one with the smallest surface area (2 mm2) will dissolve the fastest.
ReasoningSuperficial areaThe surface area or particle size especially affects the rate of solubility.
The greater the surface area (smaller particle size) the faster it dissolves. This is evidenced by the fact that a sugar cube dissolves more slowly than granulated sugar.
Solubility rateThe rate at which a solute dissolves depends on the size of the solute particles.
Dissolution is a surface phenomenon, since it depends on solvent molecules colliding with the external surface of the solute.
A given amount of solute dissolves faster when it is ground into small particles, rather than large chunks, because more surface area is exposed.
Other Factors Affecting SolubilityIn addition to solute surface area, temperature and pressure influence the balance of intermolecular forces between solvent and solute, and the change in entropy that accompanies solvation, thus changing solubility.
Learn more about solubility at https://brainly.com/question/12024964
#SPJ4
In what other ways could you test your predictions to confirm their accuracy?
When performing research, you should never believe everything a source says without checking it against another source of information.
Which informations are inaccurate or biased?Even very trustworthy sources can occasionally contain information that is inaccurate or biased. A good way to corroborate the information is checking it against another source. If several sources agree on the information, it is likely that this is trustworthy.
Accuracy is the nearness of observed values or measured values to the true value. The difference between the measured and observed value gives the error incurred during the experimental procedure.
Therefore, When performing research, you should never believe everything a source says without checking it against another source of information.
Learn more about information on:
https://brainly.com/question/13629038
#SPJ1
list at least 3 structural properties of molecules that were not accurately represented by the model kits.
The structural properties of molecules that were not accurately represented by the model kits include:
Bond angleBond lengthShape of the moleculeWhat is bond angle?Bond angle is the angle formed by two covalent bonds that originate from the same atom. The bond length of a molecule is the distance between the nuclei of two chemically bonded atoms. It is roughly equal to the sum of the two bonded atoms' covalent radii.
The position of a molecule's nuclei and electrons determines its shape. The electrons and nuclei gravitate toward positions that minimize repulsion while increasing attraction.
Learn more about molecules on:
https://brainly.com/question/26044300
#SPJ1
Lead is less active than zinc but more active than copper. Predict the results you would have gotten if you placed lead metal into
separate solutions of zinc nitrate and copper (II) nitrate.
A. Lead would react with both zinc nitrate and copper (II) nitrate
B. Lead would react with copper (II) nitrate, but not zinc nitrate
C. Lead would not react with either zinc nitrate or copper (II) nitrate
D. Lead would pact with zinc nitrate, but not copper (II) nitrate
in general, as you go across a period in the periodic table from left to right: (1) the atomic radius ; (2) the electron affinity becomes negative; and (3) the first ionization energy . question 26 options: a) decreases, decreasingly, increases b) decreases, increasingly, decreases c) increases, increasingly, decreases d) decreases, increasingly, increases e) increases, increasingly, increases
Option (b) is correct. Atomic radius decreases, electron affinity increases and ionization energy decreases when we move from lrft to right in the periodic table.
When we move from left to right across a periodic table, the atomic radius decreases. With increase in atomic number, the nuclear charge increases but the number of shells in the atoms of all the elements in a period remains the same. On moving from left to right across a period, electron affinity increases. With increase in atomic number, the nuclear charge increases but the number of shells in the atoms of all the elements in a period remains the same. The ionization energy is the energy required to completely remove an electron from a gaseous atom or ion. Ionization energies increase moving from left to right across a period. Ionization energy decreases moving down a group.
To learn more about Periodic table please visit:
https://brainly.com/question/15987580
#SPJ4
Consider an ideal gas at 27.0 degrees Celsius and 1.00atmosphere pressure. Imagine the molecules to be uniformly spaced,with each molecule at the center of a small cube. What is thelength L of an edge of each small cube if adjacent cubes touch but don'toverlap?
The length L of an edge of each small cube if adjacent cubes touch but don't overlap each other is 3.45 nm.
By the formula,
PV = Nkt
Where P is pressure, V is volume, N is number of molecules, k is Boltzmann constant and T is temperature in Kelvin.
T = 273 + 27 = 300 K
P = 101325 Pa
k = 1.38 × 10⁻²³ J/K
Now calculate the volume by,
V = (1 × 1.38 × 10⁻²³ × 300)/101325
⇒ V = 4.09 × m³
We know that, V = L³
So, L = V^1/3
Calculate the value of volume
L = (4.09/1000)^1/3
⇒ L = 3.45 × 10⁻⁹ m
Hence, the length of cube is 3.45 nm.
Learn more about ideal gas from the link given below.
https://brainly.com/question/29820918
#SPJ4
How do you calculate mass at STP?
The formula D= M/V is used at STP where,
M is equal to the molar mass and,
V is molar volume of a gas (22.4 liter/mole).
At Standard Temperature and Pressure (STP), 1 mole of any gas will occupy a volume of 22.4 L.
The Ideal Gas Law, along with a balanced chemical equation, can be used to solve for the amount, either in volume or mass, of gas consumed or produced in a chemical reaction.
The molar mass of a gas can be derived from the ideal gas law, PV=nRT , by using the definition of molar mass to replace n , the number of moles.
To know more about STP here
https://brainly.com/question/1626157
#SPJ4
free radicals produced during biochemical reactions can serve as carcinogens if they are not neutralized by:______.
Free radicals produced during biochemical reactions can serve as carcinogens if they are not neutralized by: Antioxidants.
Antioxidants are molecules that can neutralize free radicals produced during biochemical reactions. They work by donating an electron to the free radical, thus neutralizing its reactivity. AntioxidantsAntioxidants are molecules that can effectively neutralize the harmful effects of free radicals. These free radicals are produced during biochemical reactions, and can cause damage to cells and DNA if left unchecked.
Antioxidants work by donating an electron to the free radical, thus neutralizing its reactivity and preventing it from causing further damage, such as a carcinogenic reaction. Antioxidants are found in many fruits and vegetables, as well as in supplements, and are essential for maintaining good health. Therefore, it is important to ensure that you are getting enough antioxidants in your diet in order to neutralize the harmful effects of free radicals.
Learn more about Antioxidants: https://brainly.com/question/949821
#SPJ4
when pyruvate is used to form acetyl coa or ethanol in fermentation, the product has only two carbon atoms. what happened to the third carbon?
When Pyruvate is used to form acetyl coa or ethanol in fermentation the third carbon atom forms carbon dioxide and gets released.
What is pyruvate?The simplest alpha-keto acid is pyruvic acid (CH3COCOOH), which has a carboxylic acid and a ketone functional group. The conjugate base pyruvate, CH3COCOO, is a metabolic intermediary found in many different cell-wide metabolic pathways.
Pyruvic acid can be produced from glucose via the process of glycolysis, returned to carbohydrates (such as glucose) via the process of gluconeogenesis, or transformed to fatty acids via acetyl-CoA interaction. Additionally, it can be fermented into ethanol or lactic acid and used to create the amino acid alanine.
When oxygen is present (aerobic respiration), pyruvic acid provides energy to cells through the citric acid cycle, also known as the Krebs cycle, and when oxygen is not present, pyruvic acid ferments to form lactate.
The pyruvate molecule is a three carbon compound. It converts into acetyl CoA in the presence of pyruvate dehydrogenase complex. The acetyl CoA is a two carbon molecule , so the third carbon atom forms carbon dioxide and gets released. So each pyruvate molecule that turns into acetyl CoA forms one molecule of CO2.
So,When Pyruvate is used to form acetyl coa or ethanol in fermentation the third carbon atom forms carbon dioxide and gets released.
To refer more about Pyruvate visit:
https://brainly.com/question/28904313
#SPJ4
is the synthesis of ozone, o3, from oxygen, o2, an example of an exothermic or endothermic reaction?
which labeled structure is in charge of editing and sorting incoming sensory stimuli, and controlling information entry into the cerebral cortex?
Thalamus is in the charge of editing and sorting incoming sensory stimuli and controlling information entry into the cerebral cortex.
Thalamus is our body’s information relay station. All information from your body’s senses except smell must be processed through your thalamus before being sent to your brain’s cerebral cortex for interpretation. Your thalamus also plays a role in sleep, wakefulness, consciousness, learning and memory. Sensory impulses travel through nerve fibers from your body through brain structures to your thalamus. Specialized areas of your thalamus called nuclei, are each responsible for processing different sensory or motor impulses received from your body and then sending the selected information through nerve fibers to the related area of your cerebral cortex for interpretation.
To learn more about Cerebral cortex please visit:
https://brainly.com/question/1191477
#SPJ4
100 POINTS WILL GIVE BRAINLIEST
Answer:
the answer is B(conducting)
Explanation:
PLEASE MARK AS BRAINLIEST
which of the following processes is a chemical reaction? a. distillation d. condensation b. combustion e. sublima
9.4 the molecule shown here is difluoromethane (ch2f2), which is used as a refrigerant called r-32. based on the structure, how many electron domains surround the c atom in this molecule? would the molecule have a nonzero dipole moment?
The electron domains surround the C atom in this molecule is 4 electron domain. yes the molecule have a nonzero dipole moment.
The difluoromethane , CH₂F₂ have the 4 electron domains . the electron domains the are lone pairs and bond location around the particular atom present in the molecule. in the CH₂F₂ :
carbon have the valence electron = 4
Fluorine has the valence electron = 7
hydrogen has the valence electron = 1
Th CH₂F₂ has a tetrahedral geometry. the central atom Carbon has zero no. of lone pair and 4 bonded pair so, the electron domain is 4. yes the molecule have a nonzero dipole moment because of the unequal distribution of the charges.
To learn more about electron domain here
https://brainly.com/question/6367936
#SPJ4
which best describes a solution that is a good conductor of electricity and turns blue litmus paper red? which best describes a solution that is a good conductor of electricity and turns blue litmus paper red? strong acid weak base weak acid strong base\
Answer: acidic solutions will turn litmus paper red; and an alkaline solution will turn litmus paper blue.
Explanation: Litmus paper is red when the pH is less than 4.5 and blue when the pH is greater than 8.3.
also frogs are great
What is the cell potential for Zn and Cu?
The electrode potential for copper is +0.34 V and for zinc -0.76 V.
Zinc has an electrode potential of -0.76 V, whereas copper has a potential of +0.34 V, With both electrodes acting anodically in relation to their respective local electrolytes, the voltmeter measures the sum of these two voltages, or 1.10 V, in an open circuit. Two electrodes are connected in a closed circuit, which allows current to flow. Copper functions as the galvanic cell's cathode, while zinc acts as its anode, supplying electrons (consuming electrons).
Copper electrode takes up copper atoms from the electrolyte as the zinc electrode dissolves (corrodes or oxidizes) (electroplating or reduction). This procedure keeps going as long as the circuit is closed.
Learn more about electrode potential here:
https://brainly.com/question/17060277
#SPJ4
what is the electronic geometry (the arrangement of all electron pairs) around the central atom of nh3
Pyramidal is the electronic geometry (the arrangement of all electron pairs) around the central atom of nh3.
In chemistry, a trigonal pyramid is a molecular shape that resembles a tetrahedron and has one atom at the top and three at the corners of the base (not to be confused with the tetrahedral geometry). The molecule belongs to point group C3v when all three of the atoms in the corners are the same. The pnictogen hydrides (XH3), xenon trioxide (XeO3), the chlorate ion, ClO 3, and the sulfite ion, SO2 3 are some molecules and ions with trigonal pyramidal structure. Trigonal pyramidal-shaped molecules are sometimes referred to as sp3 hybridized in organic chemistry. According to the AXE technique for the VSEPR theory, the classification is AX3E1.
To know more about pyramidal geometry, click here,
brainly.com/question/1869460
#SPJ4