Explanation:
The molecules of solids are shrinked in there normal state . but as a heat energy is produced , the molecules starts curating fast and fast as temperature goes up . since they vibrate , they hit and collide each other breaking the bondings this increases the surface of area of the solid , and molecules consumes that space and they expand .
The concentration of a reactant is doubled
Answer:
Explanation: If the rate doubles when the concentration of reactant is doubled, the reaction is the first-order. If the rate becomes 4-fold times (quadruples) when the concentration of the reactant is doubled, the reaction is the second-order and similarly, the third, the fourth, and the higher orders.
what is the name of the element of atomic no 114
Answer:
Flerovium
Explanation:
Answer:
Fl or flerovium. Atomic number is the number above the element on a periodic table.
which statement correctly describes a scienfic theory
Answer:
B) It is based on repeated investigations.
Explanation:
If this is your question:
Which statement correctly describes a scientific theory?
A) It is accepted as true indefinitely.
B) It is based on repeated investigations.
C) It is equivalent to a scientific law.
D) It is accepted as false.
25.4 g of salt was dissolved in distilled water to make 425 mL of solution.
What is the percent m/v concentration?
25.4 g of salt was dissolved in distilled water to make 425 mL of solution. 5.94 percent m/v concentration.
What is concentration ?The term concentration is defined as a substance is the quantity of solute present in a given quantity of solution. Concentrations are mostly expressed in terms of molarity which is defined as the number of moles of solute in one litre of solution.
Concentration is calculated by dividing a constituent's abundance by the mixture's total volume. Mass concentration, molar concentration, number concentration, and volume concentration are four different categories of mathematical description.
Concentration = mass / volume
Mass = 25.4 g
Volume = 425ml
Concentration = 25.4 g / 425ml x 100
=5.94 percent
Thus, 25.4 g of salt was dissolved in distilled water to make 425 mL of solution. 5.94 percent m/v concentration.
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A scientist wants to know how individual lions within a pride interact with each other in their own environment.
To do this, the scientist sedates and tags all of the lions within a pride. Then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. He collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.
This example shows that
A.
observational field studies are not a valid form of scientific investigation.
B.
conditions and variables are best controlled in observational field studies.
C.
there is only one way to acquire scientific knowledge.
D.
not all scientific knowledge is gained through controlled laboratory experiments.
Answer:
Answer Choice D
Explanation:
Study Island Question
HELPPP ... short response
In your own words, explain how mass is conserved in a chemical reaction
Answer:
Matter cannot be created or destroyed in chemical reactions.
Explanation:
Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions
Answer:
Mass is conserved in chemical reactions because the atoms are just rearranged. Any atoms of an element that you have in the reactants is still there in the products, just combined differently with other atoms. The mass of an atom is the same before and after the reaction, so the total mass of the reactants and products is equal.
Explanation:
Got the question right on an assignment
2. What are the characteristics of an acid (at least 3)?
Answer:Acids taste sour, react with metals, react with carbonates, and turn blue litmus paper red. Bases taste bitter, feel slippery, do not react with carbonates and turn red litmus paper blue.
Explanation:
Sour taste (though you should never use this characteristic to identify an acid in the lab) Reacts with a metal to form hydrogen gas. Increases the H+ concentration in water.The periodic table organize elements based on
In a neutral solution, the concentration of H+ is
Answer:
1 x 10^-7 or 7
Explanation:
pH=-log(H+)
pH+pOH=14
Los blanqueadores para lavandería, contiene hipoclorito de sodio como ingrediente activo. El clorox por ejemplo contiene aproximadamente 5,2 g de NaClO en 100 ml de solución. ¿cuál en el porcentaje de hipoclorito de sodio en 500 ml de solución?
Answer:
the percentage is 1 every 5
Explanation:
9. Mr. James owns 12 gas stations in Newport News. He wants to build a
new gas station on the same block that already has a gas station. There
are 3 other different gas stations near by. He thinks it will allow the
community to have a choice as to which gas to use. What type of
viewpoint does Mr. James have?
O preservationist viewpoint
conservationist viewpoint
developmental viewpoint
Answer:
Option C, developmental view point
Explanation:
A person with preservationist viewpoint will think of only preserving the natural resources and the environment. While a person with a conservationist viewpoint will think of conserving the landscape, architecture, heritage, culture, buildings, rituals, etc.
However, a person with developmental viewpoint will think of developing resources at ease. He/She will prioritize development and comfort of customer above all.
Hence, option C is correct
PLEASE HURRY !!
Which of these is the best conductor of electricity?
distilled water
salt water
carbonated water
sugar water
Answer:
Pretty sure its salt water, my apologies if its wrong
Explanation:
Answer:
Sugar water :) took the test lol
Explanation:
Which substance is neutral
A. Baking soda
B. Table salt
C. Soap
D. Lemon juice
Answer:b
Explanation:
if the force is 200N and 5m/2 whats the pressure
Answer:
To answer your question one must look at Pascal's relationship between force, area, and Pressure.
Explanation:
[tex]P=\frac{F}A[/tex]
So we take what I assume is area:
[tex]A= 5\text{m}^2[/tex]
And I know is force:
[tex]F=200\text{N}[/tex]
So simply divide them:
[tex]P=\frac{200\text{N}}{5\text{m}^2}[/tex]
Giving you:
[tex]P = 40 \text{pascal}[/tex]
So the right answer is 40 Pascal.
look at the attached picture
Hope it will help you
Good luck on your assignment
What is the concentration of hydronium ion in a 0.121 M HCl solution?
A) 1.0 M
B) < 0.121 M
C) 0.121 M
D) not enough information
Answer:
C) 0.121 M
Explanation:
HCl + H₂O = H₃O⁺ + OH⁻
.121M .121M
HCl is a strong acid . It will dissociate almost 100 % so the concentration of acid and hydronium ion formed will be equal . It is to be noted that hydronium ion is formed due to association of H⁺ and H₂O . H⁺ is formed due to ionisation of HCl .
So concentrtion of hydronium ion ( H₃O⁺ ) will be .121 M.
What is the pH of a solution of KOH with a hydroxide concentration of [OH⁻] = 1.10 x 10⁻⁴
Answer:
[tex]p[H+] = 10.042[/tex]
Explanation:
As we know that
[tex]pKw = pH + pOH[/tex]......eq (1)
we will calculate the pH of OH- and then we will calculate the pH of H+
So p[OH-] [tex]= - log [1.10 * 10^{-4}][/tex]
Solving the right side of the equation, we get
p[OH-]
[tex]= - [-3.958]\\= 3.958[/tex]
Now we know that
[tex]pKw = 14.0[/tex]
Substituting the value of pOH in the above equation, we get -
[tex]14.0 = p[H+] + 3.958\\p[H+] = 14 - 3.958\\p[H+] = 10.042[/tex]
Please see my other questions
Answer: alr, gimme a sec
Answer:
Okay I will go look at it
Look at the following diagram of the carbon cycle.
An image of carbon cycle is shown. The sun, a cloud, two trees, one on the left and the other on the right, an animal, lake, and a factory are shown in the image. An arrow is shown from the sun towards the left tree marked A. The sun is marked B. There is an arrow from the air above the clouds, marked C, towards the left tree. An arrow from a location close to the ground marked D points towards Dead Organisms, which is a label under the animal. An arrow marked E points from the right tree straight up to the clouds. An arrow marked F points from the animal straight up to the clouds. An arrow marked G points from the factory towards the air above the clouds, C. There is an arrow pointing from the air to the lake labeled Carbonates in Water, an arrow pointing down from dead organisms to Fossils and Fossil Fuels, and an arrow from Fossils to the factory.
Which of the following statements best explains what happens at Location F?
Group of answer choices
The energy stored in atmospheric carbon dioxide is conserved because it is transformed into glucose during photosynthesis.
The energy stored in atmospheric carbon dioxide is conserved because it is used to create new forms of energy present in decomposed plants.
The energy consumed by animals in the form of glucose is conserved because it is used to create new forms of energy present in decomposed animals.
The energy consumed by animals in the form of glucose is conserved because it is transformed into chemical energy as carbon dioxide is produced during respiration.
Answer:
The energy consumed by animals in the form of glucose is conserved because it is transformed into chemical energy as carbon dioxide is produced during respiration.
Explanation:
There's no diagram....but I kinda figured it from the description.
The best explain at location F is the energy consumed by animals in the form of glucose is conserved because it is transformed into chemical energy as carbon dioxide is produced during respiration.
How glucose used in respiration?During aerobic cellular respiration, glucose reacts with oxygen, forming ATP ( Adenosine triphosphate) that can be used by the cell. Carbon dioxide and water are created as byproducts. The overall equation for aerobic cellular respiration is: In cellular respiration, glucose and oxygen react to form ATP ( Adenosine triphosphate)
Adenosine triphosphate is an organic compound which gives energy to living organisms to drive many operations in living cells such as muscle contraction, muscle pumps, nerve impulse propagation, condensate dissolution, and chemical synthesis.
Therefore, the best explain at location F is the energy consumed by animals in the form of glucose is conserved because it is transformed into chemical energy as carbon dioxide is produced during respiration.
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If the volume of a gas, at constant temperature, changes from 200 ml to 500 ml, the pressure on the gas must have changed from 400 torr to ____________.
Answer: 160 torr
Explanation:
To calculate the new pressure, we use the equation given by Boyle's law. This law states that pressure is directly proportional to the volume of the gas at constant temperature.
The equation given by this law is:
[tex]P_1V_1=P_2V_2[/tex]
where,
[tex]P_1\text{ and }V_1[/tex] are initial pressure and volume.
[tex]P_2\text{ and }V_2[/tex] are final pressure and volume.
We are given:
[tex]P_1=400 torr\\V_1=200mL\\P_2=?\\V_2=500mL[/tex]
Putting values in above equation, we get:
[tex]400torr\times 200ml=P_2\times 500mL\\\\P_2=160torr[/tex]
Thus the pressure has changed to 160 torr
Convert 11.03 moles of calcium nitrate to grams.
Answer:
1809.9 Grams of Calcium Nitrate
Explanation:
Calcium Nitrate Ca(NO3)2
Molar Mass: 164.086g/mol
Given: 11.03 mol of Ca(NO3)2 x 164.086g/mol = 1809.9 Grams of Calcium Nitrate
Mole is used to measure the tiny substances such as atoms and molecules. 11.03 moles of calcium nitrate weights 1809.9 grams.
The formula to calculate the mass of the substance,
[tex]\bold {w = m \times n}}[/tex]
Where,
w - mass
m - molar mass = 164.086 g/mol
n - number of moles = 11.03 moles
put the values in the formula,
[tex]\bold {w = 164.086 \times 11.03 }}\\\\\bold {w = 1809.9}[/tex]
Therefore, 11.03 moles of calcium nitrate weights 1809.9 grams.
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3. A wave has y frequency of 100 Hz and a speed of 50 m/s. What is the wavelength?
Answer:
0.5 m
Explanation:
The pH of a solution is 6. What is the poH of solution?
Answer:
pOH = 8
Explanation:
There are many formulaes to go from pH to pOH. One of my favorites is this one:
pH+pOH=14 (Now this just becomes an algebra problem because you already know pH value)
6 + pOH = 14 (subtract 6 from both sides)
pOH= 8
4. What kept the concept of continental drift from originally being
accepted?
Answer:
The fact that there was no driving force or motive mechanism behind the theory of continental drift.
Explanation:
The concept of continental drift was first proposed by Abraham Ortelius in 1596, and further improved on by Alfred Wegener in 1912. The theory proposes that the earth's continents have moved across the ocean bed. The continents also move with geologic time relative to each other. The concept was not accepted by scientists because there was no driving force or motive mechanism to explain the theory.
A scientist named Alfred Holmes, came up with the mantle convection theory which explains that the slow motion of the earth was caused by convection currents. This explanation was still not satisfactory to scientists. Today, the theory of plate tectonics has gained more acceptance than the theory of continental drift.
Why do precipitation reactions occur?
Answer:
Precipitation reactions occur when cations and anions in aqueous solution combine to form an insoluble ionic solid called a precipitate. Whether or not such a reaction occurs can be determined by using the solubility rules for common ionic solids.
Explanation:
This makes nooooooooooooooooooooooooooooooooooooooooooooooooooooo sense
Which shows how nuclear chemistry can help you during the closure
Answer:
Most nuclear fuels contain heavy fissile actinide elements that are capable of undergoing and sustaining nuclear fission. The three most relevant fissile isotopes are uranium-233, uranium-235 and plutonium-239
Explanation:
Based on their number of valence electrons, which group of elements will gain two electrons by bonding with other atoms?
Question 1 options:
Be, Mg, Ca, Sr, Ba
F, Cl, Br, I, At
O, S, Se, Te, Po
N, P, As, Sb, Bi
Answer:
O, S, Se, Te, Po
Explanation:
Oxygen, sulphur, selenium, tellurium and polonium are all members of group sixteen. The elements in group sixteen all possess six electrons in their outermost shell. Recall that an atom is said to stable if it contains eight electrons in its outermost shell. This is also referred to as the octet rule. Hence atoms of elements obey the octet rule when they combine to form compounds with eight electrons present on the outermost shell of each atom.
Having six electrons on their outermost shell implies that they need to gain two electrons by bonding to other atoms of other elements. Two examples will suffice here.
Water is formed when an oxygen atom shares an electron with each hydrogen atoms.
Hydrogen sulphide is formed when sulphur share two electrons with two hydrogen atoms. Hence the answer.
Answer:
O, S, Se, Te, Po
Explanation:
Hello,
In this case, when chemical bonds are formed, the valence electrons are the bridge to make it possible, nevertheless, the octet is the limit for the formation of bonds, that is, an element must not exceed 8 shared or gained electrons. In such a way, elements able to gain to electrons to attain the octet are those from the VIA group: O, S, Se, Te, Po, as they have six valence electrons, so two more electrons are suitable for attaining the octet.
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how many grams of manganese(III)
oxide would be produced from the
complete reaction of 46.8 g of zinc?
Answer:113
Explanation:let me know if it is right
According to stoichiometry and reaction which produces manganese(III) oxide 134.24 g would be produced from the complete chemical reaction of 46.8 g of manganese.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
According to the chemical reaction,of oxidation of manganese and as per stoichiometry,54.93 g manganese produces 157.87 g manganese(III) oxide so ,46.8 g of manganese will produce 46.8×157.87/54.93=134.24 g.
Thus, 134.24 g of manganese(III) oxide would be produced from the complete reaction of 46.8 g of manganese.
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In the image, which reactant is limiting?
Answer:
The black atoms
Explanation:
in some communities forest are cleared through burning in the deforested and is used for farming which of these is negative consequences of this practice
Explanation:
High emission of CO2 which is bad and the wild animals which live in that spot will flee, thus that place will eventually lose much more ecological diversity.