Answer:
The increase of noise in the wild zones affects the life of the individuals, promoting their extension, their alteration and diminishing their quality of life, this is also known as noise pollution
Explanation:
Some ecologists maintain that it is essential for the life of the wild animal that there is no disturbance of human contamination, since in this way the animals will be even more stressed and will affect both their feeding and reproduction and even the possible immunology of the animals. animals.
The contaminations are several, one of them is known as sound pollution, which refers to how humans intervene with sound and contaminate natural areas.
What is the result of increasing the temperature of a gas? A. The number of molecules will increase. B. The molecules will slow down. C. The volume of the gas will decrease. D. The kinetic energy will increase
Answer:
D. The kinetic energy will increase
Explanation:
Answer:
Hello
I think the third one is correct.
Explanation:
Because when we increase the temperature of a gas the increasing give energy to gas molecules.
Good luck.
Perform the following
mathematical operation, and
report the answer to the
appropriate number of
significant figures.
0.00325136 - 1.76527 =
Answer:
-1.76201864
Explanation:
0.00325136 - 1.76527 = 1.76201864
The concept of significant figures are mainly used by scientist and engineer to know the significance of digits in a measurement. Therefore, -1.76201 is the value on applying mathematical operation.
What is significant figures?Significant figures are the figures that indicate the degree of accuracy of a value. It tells about the precision of a value. It gives an idea about the digits that are necessary to indicate the experimental value.
Rules for counting significant figures are:
Number between 1 to 9 is always significant
Zeroes after a number has got no significance
Zeroes before a number has got no significance
Zeroes between number has got significance
0.00325136 - 1.76527
= -1.76201
Therefore, -1.76201 is the value on applying mathematical operation.
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What is the change in enthalpy of the first reaction below, given the enthalpies
of the other two reactions?
2NO(g) + O2(g) + 2NO2(g)
N,(8)+ O2(g) → NO(g)
N,(8)+O2(g) + NO2(g)
AH = 90 kJ/mol
AH° = 34 kJ/mol
A. 56 kJ
B. -112 kJ
C. 124 kJ
D. -248 kJ
Answer:
The correct option is;
B. -112 kJ
Explanation:
The parameters given are;
N (g) + O₂ (g) → NO (g) ΔH = 90 kJ/mol
N (g) + O₂ (g) → NO₂ (g) ΔH = 34 kJ/mol
The required chemical reaction is given as follows;
2NO (g) + O₂ (g) → 2NO₂ (g)
Therefore, the heat of formation of 2 moles of NO = 2 × 90 = 180 kJ
The heat of formation of 2 moles of NO₂ = 2 × 34 = 68 kJ
Hence, given that the heat of formation of O₂ at room temperature = 0 kJ/mol, we have;
Change in enthalpy of the chemical reaction = Heat of formation of the products - Heat of formation of the reactants
Change in enthalpy of the chemical reaction = 68 kJ - 180 kJ = -112 kJ
Change in enthalpy of the chemical reaction = -112 kJ.
Answer:
-112
Explanation:
got it right on test
Phosphorus has three electrons in its 3p sublevel and sulfur has four.
Phosphorus should have the lower ionization energy but it does not,
sulfur does. What does this provide evidence for?
A. Aufbau's principle
B. Conservation of energy
C. Hund' rule
D. None of these
Reset Selection
Answer:
The correct answer is C. Hund's rule.
Hund's rule states that for atoms in their ground state, electrons will occupy orbitals of the same energy level one by one before pairing up. This means that when filling the 3p sublevel, phosphorus should have one electron in each of the three 3p orbitals before any of them start pairing up.
However, in reality, sulfur has a lower ionization energy than phosphorus. This means that it is easier to remove an electron from sulfur than from phosphorus. This contradicts the expectation based on Hund's rule.
Therefore, the fact that sulfur has a lower ionization energy than phosphorus provides evidence that Hund's rule is not the only factor governing the electron configuration and ionization energies of elements. Other factors, such as electron-electron repulsion and the stability of half-filled or filled subshells, also play a role.
Who is correct? Reggie, because baking and melting cause bonds to be broken, leading to a chemical change. Reggie, because objects that are heated always undergo chemical changes. Charlotte, because melting objects only sometimes cause a chemical change. Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.
Answer: Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.
Explanation: Baking is a chemical change you cant turn it back to what it was before. Its chemical properties have changed. Melting is a physical change. Its chemical properties are still the same it has not changed. It just changed it's physical form but the object is still the object.
Answer:
Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.
Explanation:
took the quiz on edge
An element is:
A. A compound formed when different atoms react and form bonds with each other.
B. A pure chemical compound consisting of multiple atomic numbers.
C. A pure chemical substance consisting of one type of atom.
D. Two or more compounds that are mixed together but not chemically bonded.
Reset Selection
9. Let's say, you need to make 2.00 L of 0.05 M copper (II) nitrate solution. How many grams of
copper (II) nitrate will you require?
Answer:
18.76 g of copper II nitrate
Explanation:
Now recall that we must use the formula;
n= CV
Where;
n= number of moles of copper II nitrate solid
C= concentration of copper II nitrate solution
V= volume of copper II nitrate solution
Note that;
n= m/M
Where;
m= mass of solid copper II nitrate
M= molar mass of copper II nitrate
Thus;
m/M= CV
C= 0.05 M
V= 2.00 L
M= 187.56 g/mol
m= the unknown
Substituting values;
m/ 187.56 g/mol = 0.05 M × 2.00 L
m= 0.05 M × 2.00 L × 187.56 g/mol
m= 18.76 g of copper II nitrate
Therefore, 18.76 g of copper II nitrate is required to make 0.05 M solution of copper II nitrate in 2.00 L volume.
What determines an element's emission spectrum?
O A. The size of the sample
O B. The mass of the nucleus
O C. The electron energy levels
O D. The number of protons
An elements's emission spectrum determines the electron energy levels and the correct option is option C.
An element's emission spectrum is determined by the specific energy levels of its electrons. When an electron in an atom transitions from a higher energy level to a lower energy level, it releases energy in the form of electromagnetic radiation.
The wavelength and frequency of this emitted light correspond to specific energy differences between the electron energy levels. Each element has a unique arrangement of electron energy levels, leading to a distinct emission spectrum.
By analyzing the emitted light, scientists can identify the element and gain insights into its atomic structure. The size of the sample, mass of the nucleus, and number of protons do not directly determine an element's emission spectrum.
Thus, the ideal selection is option C.
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Consider the following reversible reaction.
Answer:
B is the correct option
Explanation:
K= the ratio of product of concentration of products to the product of concentration of reactants raised to power equal to their cofficients.
Answer:
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Explanation:aaaaaaa
Dogs can have different coloured coats, this is known v________
Answer:
Genes Rule
Explanation:
The color of a dog's coat is basically at the mercy of his gene pool. Genes do two things that determine a dog's appearance. They control the pigments produced (eumelanin and phaeomelanin) and where these pigments are produced.
Which of the following is a combustion reaction?
O A. CO2 + H2O + H2CO3
O B. CzHg + 502 → 3002 + 4H20
O C. MgSO4 + Ba → BaSO4 + Mg
D. NaOH + HCl → NaCl + H2O
what causes the difference genetically identical organisms
Answer:
the epigenetic perspective. ... Such variation among organisms with virtually identical chromosomal DNA sequences has largely been attributed to the effects of environment.Explanation:
5. Which type of substances do you separate into lons when writing the complete lonic equation?
Answer:
As a general rule, soluble ionic compounds, strong acids, and strong bases should be written as dissociated ions in the complete ionic equation. Insoluble salts and weak acids are written using the neutral molecular formula since they only dissociate to a very small extent in water.
Explanation:
What are the units of molality? A. mol/kg B. g/mol C. mol/L D. kg/mol
Answer:
A. mol/kg
Explanation:
hope it helps .
The world's record for the largest cup of coffee was broken on October 15, 2010 with a 2010 gallon cup of coffee in Las Vegas, Nevada. If a cup of coffee contains 318 mL of coffee, how many cups of coffee would be required to fill the world record coffee cup?
Answer: 23927 cups of coffee would be required to fill the world record coffee cup.
Explanation:
Volume of cup of coffee = 318 ml
Volume of largest cup (world record coffee cup) of coffee = 2010 gallon
Volume of largest cup of coffee in ml = [tex]2010\times 3785.41=7608678ml[/tex] ( 1 gallon = 3785.41 ml)
To find : Number of cups of coffee to fill world record coffee cup = x
Thus as we know :
[tex]{\text {Number of cups of coffee to fill world record coffee cup}}\times {\text {Volume of cup of coffee}}={\text {Volume of largest cup (world record coffee cup) of coffee}}[/tex]
Putting in the values we get:
[tex]x\times 318ml=7608678ml[/tex]
[tex]x=23927[/tex]
Thus 23927 cups of coffee would be required to fill the world record coffee cup.
The diagram below shows the different phase transitions that occur in matter. Three bars are shown labeled Solid, Liquid, and Gas. They are connected by arrows labeled 1 to 6. Arrow 1 points from liquid to gas; arrow 2 from solid to liquid, arrow 3 from solid to gas, arrow 4 from gas to liquid, arrow 5 from liquid to solid, and arrow 6 from gas to solid. Which statement best describes the process that arrow 1 represents? Molecules are speeding up as boiling occurs. Molecules are slowing to a stop while freezing. Molecules are slowing down during condensation. Molecules are vibrating in stationary positions.
Answer:
Molecules are speeding up as boiling occurs.
Explanation:
We have three states of matter;solid liquid and gas. Substances are found in these different states of matter according to the degree of energy and velocity of its particles. Highly energetic particles moving at high velocities are found in the gaseous state. Less energetic particles moving at lesser velocities due to intermolecular forces are found in the liquid state while particles with the least degree of freedom are found in the solid state. Solid particles do not translate but can vibrate or rotate about a fixed position.
When a liquid boils, particles at the surface of the liquid acquire sufficient energy and escape the surface of the liquid. This is because, as energy is supplied in the form of heat during boiling, molecules acquire sufficient energy to speed up their molecular motion and escape the liquid surface as vapour.
Molecules are speeding up as boiling occurs is the statement that best describes the process of arrow 1.
Evaporation is a physical process in which matter transforms from a liquid state to a gaseous state. Generally this process occurs when matter is exposed to high amounts of energy.
When a material is exposed to energy, its particles begin to move and speed up until they break their bonds and are released in the form of gas.
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Calculate the molar mass of carbon tetrafluoride (CF4) in grams per mole, rounding to proper significant figures, if mc= 12.01 u and mF = 19.00 u.
Answer:
molar mass of carbon tetrafluoride (CF4) is
(12.01 × 1 ) + ( 4 × 19.00)
= 12.01 + 76
= 88.01u
= 88u
Hope this helps
8. What is an energy level?
A)The region outside the nucleus where the neutron is likely to be moving.
B)The region outside the nucleus where the electron is likely to be moving.
C)The region outside the nucleus where the proton is likely to be moving.
D)The region inside the nucleus where the electrons are located.
Answer:
B. The region outside a nucleus where the electron is moving
Explanation:
The more the electron moves, the higher energy level it has, the slower the electron moves the lowwer energy level it has.
Answer:
Energy levels (also called electron shells) are fixed distances from the nucleus of an atom where electrons may be found. Electrons are tiny, negatively charged particles in an atom that move around the positive nucleus at the center. Energy levels are a little like the steps of a staircase. You can stand on one step or another but not in between the steps. The same goes for electrons. They can occupy one energy level or another but not the space between energy levels.
:D
Which of the following inter-particle forces has the lowest potential energy?
A. ion-ion interaction
b. hydrogen bonding
c. dipole-dipole interaction
d. ion-dipole moment
Answer:
b. hydrogen bonding.
Explanation:
Hope it helps.
Which of the following sources is considered to be most reliable for scientific
information?
A. Legislation regarding environmental issues
B. Article in an academic journal
C. Interpretation of a journal article
D. Political commentary on research
Answer:
The answer is D
Explanation:
Pls mark as brainliest
What is a base?
A. A substance that contributes chloride ions to the solution
B. A substance that increases the concentration of oxygen in
solution
C. A substance that increases the concentration of OH ions in
solution
D
O D. A substance that increases the concentration of H+ ions when
dissolved
de semana
Answer:
The subsrance that increases OH ion concentration.
Explanation:
What kind of solution would have a Ky value that is much less than 12
A. A strongly basic solution
B. A weakly acidic solution
C. A strongly acidic solution
D. A weakly basic solution
Answer:
The answer is option D.
A weakly basic solution
Hope this helps.
Answer:
Explanation: Apex a weakly acidic solution
39. Which of the following substances are insoluble in water? Select all that apply.
A)Li2CO3
B)BaSO4
C)Mg3(PO4)2
D)КОН
Answer:
B) BaSO₄ and C) Mg₃(PO₄)₂
Explanation:
We can use the solubility rules to decide which substances are insoluble.
You have probably learned NAG SAG and "Cats Cradle Old People," Sally Said.
I've listed them below.
[tex]\begin{array}{lll}\textbf{Soluble} & \textbf{Insoluble}\\\textbf{N}\text{itrates} &\textbf{C} \text{arbonates }\\ \textbf{A}\text{cetates} & \textbf{C}\text{hromates}\\ \textbf{G}\text{roup 1} & \textbf{O}\text{ hydrOxides}\\ & \textbf{P} \text{hosphates}\\\textbf{S}\text{ulfates} &\textbf{S} \text{ulfites}\\ \textbf{A}\text{mmonium}& \textbf{S}\text{ulfides}\\\textbf{G}\text{roup 17} & \\\end{array}[/tex]
These aids help you remember that:
The salts of Group 1 metals are soluble (Li₂CO₃ and KOH).
Sulfates are usually soluble, except for BaSO₄. Thus, BaSO₄ is insoluble.
Phosphates are insoluble — Mg₃(PO₄)₂
The two insoluble compounds are BaSO₄ and Mg₃(PO₄)₂.
The empirical formula is:
A. the actual number of atoms of each element in a molecule.
B. representation of a compound that shows how its atoms are arranged.
C. All of these
D. the relative number of atoms of each element, using the lowest whole ratio.
Reset Selection
Answer:
option c the relative number of atoms of each element using the lowest ratio because empirical formula gives the simplest-whole number ration of each element
e.g. the empirical formula of benzeneC6H6 in CH
Explanation:
I HOPE IT WILL HELP YOU
1. Convert 0.00006125 to scientific notation
Answer:
6.125 × 10^-5
Explanation:
You have to move the decimal place 5 times to the right. Remember in scientific notation the first number, (the number that comes before the 10) has to be between 1.0 and 9.99...
Match the condensed structural diagrams with the correct names
I. CH3-CH2-COOH
II. CH3-CH2-OH
III. CH3-COO-CH2-CH3
IV. CH2OH-CH2-CH3
V. CHOO-CH3
VI. CH3-COOH
46. Ethanol
47. Propyl ethanoate
48. Propan 1-Ol
49. Propanoic acid
50. Ethanoic acid
51. Methyl methanoate
Question related to above)
For each of the waters provided, identify the alcohol and the carboxylic acid that reacted
52. Methyl propanoate (-)+ (-)
53. Ethyl methanoate(-) +(-)
Answer:
Here's what I get
Explanation:
1. Names
I. CH₃-CH₂-COOH = 49. propanoic acid
II. CH₃-CH₂-OH = 46. ethanol
III. CH₃-COO-CH₂-CH₂-CH₃ = 47. propyl ethanoate
IV. H-O-CH₂-CH₂-CH₃ = 48. propan-1-ol
V. H-COO-CH₃ = 51. methyl methanoate
VI. CH₃-COOH = 50. ethanoic acid
2. Precursors
52. methyl propionate ⇒ methanol + propanoic acid
53. ethyl methanoate ⇒ ethanol + methanoic acid
Use the chemical equation to find the answers. BaSO4 + H2SO4 → Ba(HSO4)2 Identify how many oxygen atoms are in the product. Identify how many oxygen atoms are in the reactant.
Answer:
Since the equation is balanced, So it have same number of oxygen in the reactants and well as product.
Oxygen in product = 8
Oxygen in reactant = 8
Answer:
Explanation:
i got prove thoooooo
How many grams of KCl will dissolve in 100g H2O at 40°C?
Answer:
5 grams
Explanation:
In the electron configuration for scandium (atomic number 21), what is the
notation for the three highest-energy electrons?
Select one:
O a. 30% 452
O b. 453
O c. 3d3
O d. 452 4p?
Answer:
Explanation:
d. 452 4p
hope it helps
What volume of air at 25°C and 1.00 atm can he stored in a 10.0 L high-pressure air tank if compressed to 25°C and 175 atm? please show your work!
Answer:
0.057 L
Explanation:
Data obtained from the question include:
Initial temperature (T1) = 25°C
Initial pressure (P1) = 1 atm
Initial volume (V1) = 10 L
Final temperature (T2) = 25°C
Final pressure = 175 atm
Final volume =.?
From the data obtained from the question, we can see that the temperature is constant. Therefore, we shall apply the Boyle's law equation to determine the new volume of air. This is illustrated below:
P1V1 = P2V2
1 x 10 = 175 x V2
Divide both side by 175
V2 = 10/175
V2 = 0.057 L
Therefore, the volume of air which can be stored when the tank is compressed is 0.057 L