Answer:
Matter in a solid state has definite volume and definite shape.
Explanation:
The solid matter has the property of definite shape and volume because the molecules present in a solid are tightly packed so the molecules do not flow and there is no change in volume and force of attraction between the molecules will be very high that shows rigidity of molecule.
How has genetic modification most likely affected the safety and availability of fruits and vegetables?
Answer:
Genetic modification most likely affected the safety and availability of fruits and vegetables by potentially causing infertility, immune problems, and allergic reactions.
May someone Please help me with this science question!
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C A I L Y N N
Which statement describes an advantage of asexual reproduction? Asexual reproduction results in variations in DNA. Asexual reproduction causes less Competition for resources. Asexual reproduction is faster than sexual reproduction. Asexual reproduction requires more energy than sexual reproduction.
Answer:
Asexual reproduction is faster than sexual reproduction
Answer:
Asexual reproduction is faster than sexual reproduction which is d
Explanation:
Hey guys I'm under a lot of pressure to finish my Chemistry assignment before the term ends, and help will be appreciated even if you answer just one.
1. What is the pressure on a gas at 350. K if the pressure is 2.62 atm at 300. K?
2. The volume of a gas at 298K is 0.346 L when the pressure is 201 kPa, what will the volume be when the pressure is 152 kPa at 298K?
3. In a rigid, 6 L container, the pressure of N2 gas is 0.592 atm at 305 K, what temperature will the gas be if the pressure is 0.891 atm?
4. The pressure of a sample of CO2 was 2.00 atm when the temperature was 30.45 ℃, what will the pressure be if the temperature of the sample is heated to 92.01℃?
Explanation:
Hello
I answered all your questions And I explained it to you in the photo sent.
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What chemical equations must be balanced to satisfy ?
Answer:
the law of conservation of matter
Explanation:
that states that matter cannot be produced or destroyed in a closed system. The law of conservation of mass governs the balancing of a chemical equation.
is thermal decomposition a redox reaction?
Answer:
yes.
Explanation:
the definition of a redox reaction is a chemical reaction in which electrons are transferred between two reactants participating in it, meaning, thermal decomposition is a chemical reaction where a substance is being broken down hence, electrons being transfered.
What does speed means
Answer:
Speed is a form of energy or momentum that represents a person's move rate.
[tex]Example:[/tex]
The snail is moving m Miles per hour.I am driving at 50 Mph.I took miles per hour and used it as an example[tex].[/tex]
Hope this helps!
Calculate the pH of a 6.3x10-8M solution of H3O+
Considering the definition of pH, the pH of a 6.3×10⁻⁸ M solution of H₃O⁺ is 7.2.
Definition of pHpH is the Hydrogen Potential. It is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:
pH= - log [H⁺]= -log [H₃O⁺]
The numerical scale that measures the pH of substances includes the numbers from 0 to 14. The pH value 7 corresponds to neutral substances. Acidic substances are those with a pH lower than 7, while basic substances have a pH higher than 7.
pH in this caseIn this case, you know that [H₃O⁺]= 6.3×10⁻⁸ M. Replacing in the definition of pH:
pH= -log (6.3×10⁻⁸ M)
Solving:
pH=7.2
Finally, the pH of a 6.3×10⁻⁸ M solution of H₃O⁺ is 7.2.
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What is the main difference between Lewis structure and Bohr models?
The main difference between both models is that the Bohr model depicts all subatomic particles, but the Lewis dot diagram only depicts the symbol and valence electrons.
What is Lewis structure?Lewis Structure is a simplified representation of a molecule's valence shell electrons. It's used to depict how electrons in a molecule are distributed around specific atoms.
Electrons are shown as "dots" or as a line between two atoms when they are bonded in Lewis structure.The Bohr Model is a planetary model in which negatively charged electrons orbit a tiny, positively charged nucleus in the same way that planets orbit the sun.Hence the Bohr model depicts all subatomic particles, but the Lewis dot diagram only depicts the symbol and valence electrons.
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Which of the following could make a decomposition reaction occur?
heat or light
time
nothing needed for most to proceed
Heat or light could make a decomposition reaction occur. Therefore, option (A) is correct.
What are decomposition reactions?
The decomposition reactions can be described as in which one reactant breaks into one or more products during the reaction.
The decomposition reaction can be represented as the following equation:
AB → A + B
Where AB is the parent molecule that acts as a reactant and gives A and B as products.
A decomposition reaction can be possibly an exothermic reaction or endothermic reaction. Thermal decomposition reactions are those in which the energy is supplied to reactant molecules for the decomposition.
For example, the decomposition of calcium carbonate is a thermal decomposition reaction. In the products, carbon dioxide gas and calcium oxide are produced. The decomposition of ozone gas occurs in the presence of light.
Therefore, heat or light can make the decomposition reaction take place.
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Several models of atoms are mentioned in this lesson. Plum pudding, planetary and quantum mechanical. Which reason below explains why there are different atom models?
Because atoms have changed their structure over time
Because there are different types of atoms
Because the ideas about the models changed as more discoveries were made about the atom
Because many people came up with models at the same time
Answer:
Because the ideas about the models changed as more discoveries were made about the atom
Explanation:
I know because i took this test and made a 100% on it
hope I was helpful :)
What is the volume of 1 mole of gas at Standard Temperature and Pressure (STP)?
Explanation:
[tex]22.4 lit[/tex]
Which statement describes a difference between transcription in eukaryotic and prokaryotic cells?
In eukaryotes, transcription occurs simultaneously with translation, while transcription in prokaryotes must complete before translation can begin..
In eukaryotes, transcription produces a monocistronic RNA, while transcription in prokaryotes produces a polycistronic RNA.
In eukaryotes, transcription produces an RNA molecule, while transcription in prokaryotes produces a DNA molecule.
In eukaryotes, transcription produces an DNA molecule, while transcription in prokaryotes produces a RNA molecule.
In eukaryotes, transcription is completed by an RNA polymerase, while transcription in prokaryotes is completed with a DNA polymerase.
Answer:
Which statement describes a difference between transcription in eukaryotic and prokaryotic cells?
In eukaryotes, transcription occurs simultaneously with translation, while transcription in prokaryotes must complete before translation can begin..
In eukaryotes, transcription produces a monocistronic RNA, while transcription in prokaryotes produces a polycistronic RNA.
In eukaryotes, transcription produces an RNA molecule, while transcription in prokaryotes produces a DNA molecule.
In eukaryotes, transcription produces an DNA molecule, while transcription in prokaryotes produces a RNA molecule.
In eukaryotes, transcription is completed by an RNA polymerase, while transcription in prokaryotes is completed with a DNA polymerase.
When referring to bacteria cells, a plasmid
is not naturally occuring.
does not code for proteins.
is the large bacterial chromosome contained in the nucleoid.
is composed of double-stranded RNA.
is a small, circular double-stranded DNA molecule that replicates autonomously.
Answer:
is a small, circular double-stranded DNA molecule that replicates autonomously.
Explanation:
hope this helps
An old iron battery was discarded in this meadow. The iron in the battery is undergoing a ____ change as it rusts. The rusting is changing the battery's color from black to orange. A) physical B) chemical C) environmental D) none of these changes are occurring
Answer:
chemical
Explanation:
A chemical change is irreversible and leads to the formation of new products.
Rusting occurs as a result of an irreversible chemical reaction between iron, oxygen and moisture. Rusting is the oxidation of iron when exposed to oxygen and moisture.
The rusting of iron is an electrochemical process in which water serves as the electrolyte and iron serves as the anode. The rusting of iron leads to the formation of hydrated iron III oxide (rust) usually seen an brown flakes that surround a rusted iron material.
hello people ~
Petrochemicals are
A. mixtures of petrol and chemical fertilizer.
B. materials obtained from petroleum refining.
C. mixtures of coal and petrol.
D. mixtures of wood and chemicals
Materials obtained from petroleum refining
Answer:
Petrochemicals are mixtures of petroleum and natural gasThey ae mined undergroundExamples are Petrol,diesel ,etc
Given the reaction fe o2 right arrow. fe2(3 )o3(2-), what happens to the oxidation states of these elements? fe o
The oxidation state of iron changes from 0 to +3, and of oxygen changes from 0 to -2.
What is oxidation state?Oxidation state of any atom will tells about the number of exchangeable electrons.
Given chemical reaction is:
Fe + O₂ → Fe₂O₃
Initially in the reactant form, oxidation state of iron (Fe) atom and oxygen (O₂) molecule is zero as they are in elemental form. Oxidation state of 2 iron atoms in the product (Fe₂O₃) is +3 as it is combined with the 3 atoms of oxygen whose oxidation state is -2.
Hence, oxidation state of Fe and oxygen changes as we going from reactants to product side.
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Answer:
B and A
Explanation:
a particular radio station broadcasts radio waves at 100 MHz (100 million Hz). if radio waves travel at the speed of light (300 million m/s), then what is the wavelength of the radio waves that the station broadcasts.
Wavelength = (speed) / (frequency)
= (3 x 10⁸ m/s) / (1 x 10⁸ /s) = 3 meters
What happens to temperature as a substance melts and heat energy is used to break the connections between molecules, until all melting is complete?.
What happens to temperature as a substance melts and heat energy is used to break the connections between molecules, until all melting is complete?.
Answer : Stays the same
What is the melting point of ammonia?
-107.9°F is the melting point
Answer: -107.9°F
Explanation: Hopefully this helped have a blessed and good day!
can someone tell me how to differentiate if a given salt is acidic, basic, or neutral?
[tex]\bold{\huge{\underline{ Solution }}}[/tex]
Basic Characteristic of acids Acids are sour in taste Acid turns blue litmus paper or solution into red litmus paper or solution Acids are good conductor of electricity because it dissociate into cation in aqueous solution Acids classified into edible acids and non edible acids. Non edible acids are very hazardous Generally, All acids are soluble in water Acids have PH smaller than 7Arrhenius definition of acids :-
According to Arrehinus,
Acids are those substances which when dissolve in water given H positive ions . Then, this hydrogen ions combine with water to form H30 + ionsSecond definition of Acids was given by Bonsted Lowry :-
According to Bonsted Lowry
Acids are the proton donors that is when acids dissociate into water gives hydrogen ions that is H+ ions3rd definition was given by Lewis
According to Lewis
Acids are those substances which have the ability to accept a pair of electrons .Example of Acids
HNO3 :- Nitric acid H2SO4 :- Sulfuric acidHCl :- Hydrochloric acid Basic characterists of bases Bases are bitter in taste Bases turns red litmus paper into blue litmus paper or solution Bases are also good conductor of electricity because on dissociation it produces anion in aqueous solution Bases are also good conductor of electricity When bases are soluble in water then they are known as alkaline baseBases have PH greater than 7Arrehinus definition of bases :-
According to Arrehinus ,
Bases are those substances which when dissolve in water produce OH negative ions that is hydroxide ionsBonsted Lowry definition
According to Bonsted Lowry
Bases are the proton donors as they produce OH negative ions in dissociation in aqueous solutionLewis definition
According to Lewis
Acids are those substances which have the ability to lose electrons that is they are electron donors.Example of bases
Ca(OH)2 :- Calcium hydroxide NaOH :- Sodium hydroxide KOH :- Potassium hydroxide[ Note :- There are so many Lewis acids and bases but they are not Arrhenius or Lowry acids or bases ]
Basic characteristic of salt Salts are the ionic compounds which are composed of acids and bases that cation and anion Salts are generally found in oceans and seas in the forms of crystals As they are composed of acids and bases so they are neutral in nature but the salt of strong acid or weak base is acidic in nature or vice versa Salts are also good conductor of electricity as they form ionic bond Generally, All salts are soluble in water.The PH of common Salt is 7Example of salts
NH4Cl :- Ammonium chloride CuSO4 :- Copper sulphate NaCl :- Sodium chlorideIndividual cells do not need to maintain homeostasis.truefalse
Answer:
The answer is
→ False.
Explanation:
Without homeostasis, cells can't build up body systems which require homeostasis. Without homeostasis, body systems can't be created and life on Earth would be impossible without homeostasis.
Which statement is true about the exothermic reaction?
A.) The enthalpy of the products is greater than that of the reactants.
B.) The enthalpies of the reactants and the products are equal.
C.) The enthalpy of the reactants is greater than that of the products.
Answer:
C
Explanation:
The enthalpy of the reactants is greater than that of the products.
The statement is true about the exothermic reaction is the enthalpy of the reactants is greater than that of the products. Therefore, option C is correct.
What is an exothermic reaction ?A chemical reaction involves the movement of energy to or from the environment. An exothermic reaction occurs when energy is transmitted to the environment, raising the ambient temperature. Combustion reactions are an example of an exothermic reaction.
Chemical processes known as exothermic reactions generate heat. Therefore, the H of reaction is negative for exothermic processes. Heat is released during an exothermic reaction, raising the temperature of the immediate environment. The environment is cooled through an endothermic process that absorbs heat.
Heat is released during an exothermic reaction, raising the temperature of the immediate environment. The environment is cooled through an endothermic process that absorbs heat.
Thus, option C is correct.
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60 points! please answer will mark brainliest! thank you!
Someone Please Help Me out
Answer:
where are u stuck ????
Explanation:
tell us fast
what is electron also what is the meaning of civil rights also what is a force
Answer:
what is electron?electrone is a subatomic particle whose electric charge is negative one elementary charge.
what is the meaning of civil rights?civil rights are the rights that people have to equal treatment and equal opportunities.
what is force?in physics, force is an influence that can change the motion of an object.
Can somebody try and answer 1 of these questions also for 5 answer in 3 sentences thx!!!!
(Will mark as brainliest) promise
:D
Answer:
Comparative Anatomy:
5. Comparative anatomy is the comparative study of the body structures of different species of animals in order to understand the adaptive changes they have undergone in the course of evolution from common ancestors.
One way whales are different from fish is:
1) Whales actually breathe air with lungs using their blowholes to breath out!. Fish get oxygen directly from the water through their gills.
Hope this helps! :D
a mass of 0.15 ounces is equal to how many grams if 1 oz = 28.35 grams?
Answer:4 1/2 grams.
Explanation: 0.15 is equal to 4 1/2 grams because if you convert ounces into grams 0.15 is equal to 28.35. hope this helped bro.
What is the momentum of a car with a
mass of 1000 kg traveling at the speed of 2 m/s?
Answer:
The answer is 2000 kgm/sExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocityFrom the question
mass = 1000 kg
speed = 2 m/s
We have
momentum = 1000 × 2
We have the final answer as
2000 kgm/sHope this helps you
(Will give brainlest if right)Which substance can be broken down chemically ? A) Ammonia B)aluminium C)Argon
Answer:
i believe its b but i could be wrong