Answer: Its A, provides landmarks, such as buildings
Explanation:
the person above me is wrong </3
Answer:
A (provides landmarks, such as buildings)
Explanation:
Satellite imagery is a useful tool used in GPS and many other forms of digital mapping. It is often extremely detailed and useful for looking at what buildings are where! :))
Which is evidence that a chemical reaction has likely occurred?
a liquid slowly losing volume
the formation of a precipitate
boiling water releasing steam
a change in the shape of a solid
Answer:
The formation of a precipitate
Explanation:
took thecquiz on edge. got it correct
The formation of a precipitate is a evidence that a chemical reaction has likely occurred.
What is Chemical Reaction ?
A chemical reaction is a process in which chemical bonds between atoms to break and reorganize, to form other new substances.
Evidence of a Chemical Reactionformation of precipitate a change in colorformation of a gastemperatureodor changeNow lets check all option one by one
Option (A): a liquid slowly losing volume
Here change in volume occurred which is not a evidence of a chemical reaction.
So it is incorrect option.
Option (B): the formation of a precipitate
Here formation of precipitate is a evidence of a chemical reaction.
So it is correct option.
Option (C): boiling water releasing steam
Here formation of evaporation takes places which is not a evidence of a chemical reaction.
So it is incorrect option.
Option (D): a change in the shape of solid.
Here change in shape occurred which is not a evidence of a chemical reaction.
So it is incorrect option.
Thus, from we can say that the formation of a precipitate is a evidence that a chemical reaction has likely occurred.
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. Sketch the nucleotide being described: it uses a monosaccharide present in RNA, and a nitrogenous base found only in RNA. Point an arrow to the glycosidic bond.
Answer:
See below
Explanation:
The glycosidic bond forms between the carbon atom on the glucose molecule and the nitrogen atom present on the nitrogenous base. A diagram has been attached to show this particular bond. There is also a phosphate molecule bonded on the sugar molecule at the other end.
Hydrochloric acid and sodium hydroxide can be combined to form sodium chloride and water. Which best explains the reaction? The mass of sodium hydroxide will result in the same mass of sodium chloride. The total mass of hydrochloric acid and sodium hydroxide will result in a lower total mass of sodium chloride and water. The mass of hydrochloride acid will result in the same mass of sodium chloride. The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water.
Answer:
The statement "The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water." is true due to the Law of Conservation of Mass which states that matter cannot be created nor destroyed.
The correct answer to the question is: The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water.
Chemical equation is backed up by the law of conservation of matter (mass) which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to the other.
Thus,
The total mass of reactants is equal to the total mass of products.
For example: let us consider the reaction between hydrogen and oxygen to produce water
2H₂ + O₂ —> 2H₂OReactant:2H₂ = 2(2×1) = 2(2) = 4 g
O₂ = 2 × 16 = 32 g
Total mass = 4 + 32 = 36 gProduct:2H₂O = 2[(2×1) + 16]
= 2[2 + 16]
= 2[18]
Total mass = 36 gThus,
Mass of reactant = mass of productFrom the above illustration, we can conclude that the total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water.
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write the structure of 2 butene class 10
Answer:
The answer is C4H8.
Explanation:
I hope it helps you
Pass your test fast okay
BYE!
The most negative electron affinity is most likely associated with which type of atoms?
large nonmetal atoms
small nonmetal atoms
large metal atoms
small metal atoms
Explanation:
elements are based on electrical conductivity
The most negative electron affinity is most likely associated with small nonmetal atoms.
Electron affinity refers to the ability of an atom to accept electrons and form negative ions.
Electron affinity decreases down the group but increases across the period.
As atoms become smaller, the energy released when they accept electrons become increasingly more negative.
Hence, the most negative electron affinity is most likely associated with small nonmetal atoms.
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A certain volume of a gas had a pressure of 800 torr at a temperature of -40 degrees C. What was the original volume if the volume at STP is now 450.0 cm^3?
(the correct answer is 365 cm^3. I just need an explanation.)
Answer : The original volume of gas is [tex]365cm^3[/tex]
Explanation :
Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.
The combined gas equation is,
[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 800 torr
[tex]P_2[/tex] = final pressure of gas at STP = 760 torr
[tex]V_1[/tex] = initial volume of gas = ?
[tex]V_2[/tex] = final volume of gas at STP = [tex]450.0cm^3[/tex]
[tex]T_1[/tex] = initial temperature of gas = [tex]-40^oC=273+(-40) =233K[/tex]
[tex]T_2[/tex] = final temperature of gas at STP = [tex]0^oC=273+0=273K[/tex]
Now put all the given values in the above equation, we get:
[tex]\frac{800torr\times V_1}{233K}=\frac{760torr\times 450.0cm^3}{273K}[/tex]
[tex]V_1= 364.8cm^3\approx 365cm^3[/tex]
Therefore, the original volume of gas is [tex]365cm^3[/tex]
Two compounds are standing at the same temperature. Compound "A" is evaporating more slowly than compound "B." According to the Kinetic Molecular Theory, which assumption can be made? A.) Compound B has a greater average kinetic energy. B.) Compound A has a greater average kinetic energy. C.) Compound A may have a lower molecular weight. D.) Compound B may have a lower molecular weight.
Answer:
Option D) Compound B may have a lower molecular weight.
Explanation:
Compound A and B are standing at the same temperature yet compound A is evaporating more slowly than compound B.
This simply indicates that compound B have a lower molecular weight than compound A.
This can further be seen when gasoline and kerosene are placed under same temperature. The gasoline will evaporate faster than kerosene because the molecular weight of the gasoline is low when compared to that of the kerosene.
Classify the changes involved in the following processes as physical or chemical changes: (a) Photosynthesis (b) Dissolving sugar in water (c) Burning of coal (d) Melting of wax (e) Beating aluminium to make aluminium foil (f) Digestion of food
Explanation:
a. chemical change
b. Physical change.
c. chemical change.
d. chemical change
e. Physical change.
f. chemical change.
What is the correct order of processes in the accretion of planetesimals?
Answer:
A). Collapse, condensation, accretion, clearing.
Explanation:
Planetesimals are described as the small solid astronomical objects which are the building blocks for the formation of solid planets. Accretion is described as the process in which the solid astronomical objects cluster to form larger objects that eventually leads to the formation of planets.
As per the question, the correct order of processes that are followed in this accretion process would be a collapse, condensation, accretion, clearing. First occurs the collapse of a nebula followed by condensation of cosmic dust grains. After this, the accession or accumulation of solid parts takes place to form larger objects and this is immediately followed by the clearing of debris and dust to allow planets to form. Thus, option A is the correct answer.
Answer:
a
Explanation:
A substance is on its fifth half-life. Which approximates the percentages of radioactive and stable isotopes, respectively? 96.9%; 3.1% 3.1%; 96.9% 12.5%; 87.5% 87.5%; 12.5% Need an answer fast
Answer:
B
Explanation:
Edge 2020
Answer:
B babeeeeeeeeeeeeee
Explanation:
Which metal can replace another metal in a reaction?
I NEED HELP PLEASE! :)
-Provide TWO math based “you solve it” questions with answers for EACH of the laws. Please be sure to explain in detail how to solve the problems.
Answer:
See below.
Explanation:
1. Newton's first law
(a) Problem 1
What is the net force required to keep a 500 kg object moving with a constant velocity of 10 m·s?
Answer: None.
Explanation: An object in motion stays in motion unless a net force acts on it.
The object will keep moving at 10 m/s.
(b) Problem 2
A force of 20 N acts on a 10 kg object from the left. A force of 30 N acts on it from the right. What is the net force required to keep the object moving with a constant velocity of 10 m/s?
Answer: 20 N
Explanation:
The net force is
30 N - 20 N = 10 N
You must apply another 10 N from the left. The net force is then:
30 N - 30 N = 0
If there is no net force, the object will keep moving at 10 m/s.
2. Newton's second law
(a) Problem 1
What is the net force needed to accelerate an object at a constant 5 m·s⁻²?
Answer: 5 N
Explanation:
F = ma = 1 kg × 5 m·s⁻² = 5 kg·m·s⁻² = 5 N
(a) Problem 2
A net force of 2 N acts on a 1 kg object. What is the magnitude and direction of the acceleration?
Answer: 2 m·s⁻²
Explanation:
F = ma
2 N = 1 kg × a
a = (2 N)/(1 kg) = (2 kg·m·s⁻²\1 kg) = 2 m·s⁻²
The direction of the acceleration is the same as that of the applied force.
2. Newton's third law
(a) Problem 1
A person with a mass of 58 kg is standing near you. Diagram and calculate the opposing forces.
Answer: 570 N up and down
Explanation:
See Fig. 1. The person's mass exerts a downward force on the floor.
F = mg, where g is the acceleration due to Earth's gravity
F = 58 kg × 9.8 m·s⁻² = 570 kg·m·s⁻² = 570 N
The floor exerts an upward force of 570 N.
(a) Problem 2
A teacher (mass 65 kg) pushes a cart (mass = 12 kg) of equipment (mass = 7 kg). Her foot applies a force of 150 N backward on the floor against a frictional force of 24 N. Diagram the opposing forces and calculate the net force available to move the cart.
Answer: 126 N
Explanation:
See Fig. 2 below. The teacher's mass exerts a downward force W on the floor, which exerts an equal reaction force R upward. The cart and equipment also exert a downward force on the floor, which exerts the same force upward. We can ignore these forces because they do not contribute to forward motion.
The teacher's foot exerts a backward force of 150 N on the floor, which exerts an equal force forward. However, a frictional force of 24 N opposes the forward force.
The net external force is the force of the floor minus the opposing frictional force. Thus,
F = 150 N − 24 N = 126 N
What happens to an ocean current when it hits a continent? a. It changes direction. c. It moves toward the equator. b. It moves toward the poles. d. It speeds up.
Answer: I think it is D
Explanation:
Answer:
D
Explanation:
i took the test
If the frequency of a wave is 68 hertz then the period of the wave is going to be
Answer:
0.01471 seconds
Explanation:
the period of a wave is given by 1/frequency.
which of these liquids is the least acidic?
Answer:
The answer is lemonade.
Weaker acids are those which tend to have a higher pH from 4 to at least 6 stronger acids have low pH from 2 and below that's from 2 to 0.
Hope this helps
Hope
Chemical reactions can be recognized by the presence of heat, light, or gas formation. The ultimate outcome for any chemical reaction is the... a) change from solid to a liquid b) presence of sound c) formation of a new chemical substance
Answer:
c. formation of a new substance
Answer:
C.) formation of a new chemical substance.
Consider the following reversible reaction. CO(g)+2H2(g) CH3OH(g) What is the equilibrium constant expression for the given system?
Kc=28.7 is the equilibrium constant
How is the equilibrium constant 28.7 explain?
[CO]=26.7g(28.01g/mol)(5.25L)=0.182M
[H2]=2.33g(2.016g/mol)(5.25L)=0.220M
[CH3OH]=8.65g(32.04g/mol)(5.25L)=0.0514M
Kc= x/(0.182−x)(0.220−2x)2
= 0.0514/(0.182−0.0514)(0.220−2(0.0514))2
= 28.7
What is equilibrium constant?a number that expresses the relationship between the amounts of products and reactants present at equilibrium in a reversible chemical reaction at a given temperature.
So, this shows the equilibirum constant is 28.7
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A chemistry student in lab needs to fill a temperature-control tank with water. The tank measures 24.0 cm long by 21.0 cm wide by 13.0 cm deep.
In addition, as shown in the sketch below, the student needs to allow 2.0 cm between the top of the tank and the top of the water, and a round-bottom flask
with a diameter of 10.5 cm will be just barely submerged in the water.
Calculate the volume of water in liters which the student needs. Round your answer to the nearest 0.1 L. ol.2 cm
M
flask
OL
6
water
Answer:
The required volume of water the student needs is 4.9 litres of water
Explanation:
From the diagram related to the question, we have;
The dimensions of the tank are;
Length of tank = 24.0 cm = 0.24 m
Width of tank = 21.0 cm = 0.21 m
Depth of tank = 13.0 cm. = 0.13 m
Allowance provided between the top of the tank and the top of the water = 2.0 cm
Diameter of the round bottom flask, D = 10.5 cm = 0.105 m
Therefore, the radius of the round bottom flask, r = 0.105/2 = 0.0525 m
Therefore we have;
Depth of water in the tank = Depth of tank - Allowance provided between the top of the tank and the top of the water
∴ Depth of water in the tank = 13.0 - 2.0 = 11.0 cm = 0.11 m
Given that the flask is immersed in the water contained in the tank to raise the tank water level, we have;
Volume of water + Volume of flask in the tank = Length of tank × Width of tank × Depth of water in the tank
Volume of water + Volume of flask in the tank = 0.24 × 0.21 × 0.11 = 0.005544 m³ = 0.005544 m³× 1000 l/m³ = 5.544 l
The volume of the spherical flask = 4/3·π·r³ = 4/3·π·0.0525³ = 6.06×10⁻⁴ m³ = 6.06×10⁻⁴ m³ × 1000 l/m³ = 0.606 l
The required volume of water the student needs , V = Volume of water + Volume of flask in the tank - The volume of the spherical flask = 5.544 l - 0.606 l = 4.9 l.
SO3 is an empirical formula for which of the following?
Answer:
what are the options
Explanation:
there are no options
SO₃ is an empirical formula for S₂O₆ and the correct option is option C.
The empirical formula of a compound represents the simplest, most reduced ratio of the atoms present in the compound. It shows the relative number of atoms of each element in the compound, without indicating the actual number of atoms. In other words, it gives the simplest whole number ratio of the elements in a compound.
To determine the empirical formula, the relative amounts of each element in the compound are expressed in terms of moles or mass. Then, the ratios of the moles or masses are simplified to their lowest whole number values.
Thus, the ideal selection is option C.
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The complete question is -
SO₃ is an empirical formula for which of the following?
A. S₄O₂
B. SO₄
C. S₂O₆
D. S₂O₃
Which claim about cats is most likely based on science?
O A. Egyptian myths explain that the sun god, Ra, appeared in living
form as a cat.
O B. Fairy tales during the Middle Ages said that cats are evil and that
they spread plague.
C. Ancient Eastern cultures believed that cats should be held in high
regard.
D. Genetic data show that modern domestic cats are related to Near
Eastern wildcats.
Answer:D
Explanation:
The claim about cats is most likely based on science is Genetic data show that modern domestic cats are related to Near Eastern wildcats. The correct option is D.
What is a claim?A claim is a statement that is given by a person about his or her things, and they claim that the thing. It gives proof that a thing or house is a person's property.
Genetic data is the data of the genetic sequence of a person's genetic information. It is different for every person. So genetic data is very important.
So the scientific data will be the genetic data of cats that is claiming that domestic cats are related to Near Eastern wildcats. It is most likely a scientific claim.
Thus, the correct option is D. Genetic data show that modern domestic cats are related to Near Eastern wildcats.
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You are performing an experiment and produce an unidentified compound. You know it is composed of carbon, calcium, and oxygen but you do not know how many of each are present. You determine its relative formula mass is 100.1 g/mol. What is its molecular formula?
A. Ca2CO
B. CaCO3
C. Ca2C2O2
D. all of these
Answer:
B. CaCO3
Explanation:
Answer via Educere/ Founder's Education
[tex]CaCO_3[/tex] has its relative formula mass is 100.1 g/mol. Thus, the second choice is the compound.
What is molecular mass?The molar mass/molecular weight is actually the sum of the total mass in grams of the atoms present to make up a molecule per mole.
Given the relative formula mass = 100.1 g/mol
Unknown:
Molecular formula of the compound
Solution:
To identify this compound, let us find the molecular mass of the choices given.
The one that tallies with the number 100.1 g/mol is the solution:
For;
[tex]CaCO_3[/tex];
Atomic mass of Ca = 40.078
Atomic mass of C = 12
Atomic mass of O = 16x3
Insert the parameters and solve;
Relative molecular formula = 40.078 + 12 + 48 = 100.078
g/mol
So, the second choice is the compound.
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Discuss 3 factors that affect the solubility of a solid in a liquid.
Answer:
Explanation:
Temperature: increasing the Temperature increases the solubality
Polarity: increase of polarity increases the soluablity of polar solutes
The larger the molecules of the solute are, the larger is their molecular weight and their size. It is more difficult it is for solvent molecules to surround bigger molecules.
For majority of solid and liquid solutes, pressure does not affect solubility. it is applciaable only for gasesous solute
Hope this helps you
l. Loosening of immigration policies
II. Subsidies for families with children
III. Lower taxation on families with children
Some countries desire an increase in the growth rate of their population in order to provide a base for economic growth. Which choice
represents policies that will increase a country's population growth?
A)
I only
B)
Il only
9
III only
D)
I, II, and III
Answer:
I think is the third one
does the volume of a liquid change
Answer:
Yes it does change
Explanation:
Why is sodium stored in kerosene oil?
Answer:
Sodium is stored under kerosene because of its high chemical reactivity with almost all of other elements (for example oxygen from air which oxidizes it instantly). Kerosene and mineral oil are the only chemicals that make the sodium inert. Usually when Na reacts with a solvent it liberates hydrogen gas from its composition.
Explanation: Just saying , I want to be honest. I copied and pasted this from google
An ionic bond occurs between what particles?
two negative ions
a positive and negative ion
two positive ions
two neutral atoms
Answer:
A positive and a negative ion.
Explanation:
Complete the following radioactive decay problem. Please help
Answer:
230 90Th
Explanation:
A careful observation of the equation given in question shows that 234 92U is undergoing alpha decay. This means that the resulting daughter nuclei will have a decrease of 4 in the mass number and a decrease of 2 in the atomic number.
Please see attached photo for further details.
In the mechanism of nucleophilic substitution (SN1 or Sn2), an existing bond breaks and a new bond forms. What is one main difference between the two mechanisms? (A) An SN2 reaction leads to inversion of configuration while an Sy1 reaction gives retention of configuration at a stereogenic carbon. (B) Tertiary butyl halides can react by either mechanism. (C) The timing of bond formation and bond breaking are different in the two mechanisms. on carbocation stability (D) The rate of an SN2 reaction is dependent (E) The rate of an SN1 reaction is independent of the electrophile concentration
This question is incomplete because one of its options was not written properly.
Complete Question
In the mechanism of nucleophilic substitution (SN1 or Sn2), an existing bond breaks and a new bond forms. What is one main difference between the two mechanisms?
(A) An SN2 reaction leads to inversion of configuration while an Sy1 reaction gives retention of configuration at a stereogenic carbon.
(B) Tertiary butyl halides can react by either mechanism. (C) The timing of bond formation and bond breaking are different in the two mechanisms.
(D) The rate of an SN2 reaction is dependent on carbocation stability
(E) The rate of an SN1 reaction is independent of the electrophile concentration
Answer:
(A) An SN2 reaction leads to inversion of configuration while an SN1 reaction gives retention of configuration at a stereogenic carbon.
Explanation:
Nucleophilic substitution can be defined as the reaction that occurs between a nucleophile and an electrophile.
In Nucleophilic substitution we have two mechanism of reaction.
a) SN1 mechanism
b) SN2 mechanism.
SN1 mechanism is a two step mechanism. SN1 mechanism is a unimolecular mechanism because it takes place in only one molecule. This mechanism is independent of the concentration of the base or nucleophile used in the reaction. SN1 reaction leads to the retention of configuration at a stereogenic carbon
SN2 mechanism is a mechanism that takes place in only 1 step. SN2 mechanism is a Bimolecular mechanism because it takes place in only two molecules. This mechanism is dependent on the concentration of the base or nucleophile used in the reaction. An SN2 reaction results in the inversion of configuration at a stereogenic carbon.
One main difference between the two mechanisms is that the an SN2 reaction leads to inversion of configuration while an SN1 reaction gives retention of configuration at a stereogenic carbon.
what is the word equation for
anhydrous copper (2) sulphate and water
Explanation:
When writing chemical equations for reversible reactions, the usual one-way arrow is not used. Instead, two arrows are used, each with just half an arrowhead - the top one pointing right, and the bottom one pointing left.
For example:
ammonium~chloride \rightleftharpoons ammonia + hydrogen~chloride
NH_{4}Cl(s) \rightleftharpoons NH_{3}(g) + HCl(g)
Why do reactions need to be balanced?
A. Because the reactants must be the exact same as the products
B. Because of the conservation of energy
C. Because the volume of reactants must equal the volume of
products
D. Because atoms are not lost or gained in a chemical reaction
Answer:
A part.
Explanation:
Because the reactants must be the exact same as the the products.