Answer:
Air pollution is a mixture of solid particles and gases in the air. Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog. Air pollution is the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials. There are different types of air pollutants, such as gases, particulates, and biological molecules. Air pollution is caused by solid and liquid particles and certain gases that are suspended in the air. These particles and gases can come from car and truck exhaust, factories, dust, pollen, mold spores, volcanoes and wildfires. Air pollution can also cause headaches, dizziness, and nausea. ... Long-term health effects from air pollution include heart disease, lung cancer, and respiratory diseases such as emphysema. Air pollution can also cause long-term damage to people's nerves, brain, kidneys, liver, and other organs. The most basic solution for air pollution is to move away from fossil fuels, replacing them with alternative energies like solar, wind and geothermal. Producing clean energy is crucial. But equally important is to reduce our consumption of energy by adopting responsible habits and using more efficient devices.
Its sad of what our world has become
8 sentence paragraph:
Air pollution is a mixture of solid particles and gases in the air. Car emissions, chemicals from factories, dust, pollen, and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog. Some air pollutants are poisonous. Inhaling them can increase the chance you'll have health problems. People with heart or lung disease, older adults, and children are at greater risk from air pollution. Air pollution isn't just outside like the air inside buildings can also be polluted and affect your health.
A different element, , is located in the same row of the periodic table as element , but has roughly half the atomic mass of . Is the atomic radius of less than, equal to, or greater than the atomic radius of ? Justify your answer using principles of atomic structure.
Answer:
It is way too long I can't help with it Honestly
An element in the same row with roughly half of the atomic mass always has a greater atomic radius.
Atomic radius: It is the distance between the nucleus and the outermost shell.
Atomic mass: It is the mass or the number of nucleons or protons and neutrons inside an atom.
In a row, the number of protons increase but the number of shells remains constant.
Hence, the positive protons in the nucleus attract electrons with more electrostatic force.
Therefore, an element in the same row with roughly half of the atomic mass always has a greater atomic radius.
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Which molecules is converted directly to acetyl CoA without the intermediate step of being converted first to pyruvate
Answer:
Fatty acids
Explanation:
Acetyl coA is a compound vital for the process of cellular respiration in the mitochondria. It is the starting material of the kreb's cycle or TCA cycle, which takes place in the mitochondria. During the metabolism of glucose (glycolysis), a molecule called PYRUVATE is first synthesized before becoming acetyl coA in the mitochondrion.
However, the metabolism of FATTY ACIDS (monomers of lipids) directly gives rise to acetyl coA without first becoming pyruvate. The fatty acids molecule undergo Beta- oxidation to produce acetyl coA, which enters the TCA cycle to continue cellular respiration.
There is an equal number of protons and __________ in a neutral atom.
A. electrons
B. neutrons
C. protons
D. elements.
the answer is electrons
Round off 808.57 to 4 significant figures.
Answer:
808.6
Explanation:
Conduction, convection and radiation can occur in variety of ways. Give another example, like the campfire picture above, where you have seen all three methods
Answer:
13
Explanation:
It shows the answer in the text.
Which of the following electron configurations correspond to an excited state? Identify the atoms and write the full, ground state electron configuration where appropriate.
1s22s23p1
1s22s2sp6
1s22s22p43s1
[Ar] 4s23d54p1
Electron configurations correspond to an excited state is 1s₂, 2s₂, 3p₁.The electrical configuration 1s₂, 2s₂, 3s₁ demonstrates that the atom is in the excited state.
What is electronic configuration ?The distribution of an atom's or molecule's electrons in atomic or molecular orbitals is known as the electron configuration in atomic physics and quantum chemistry.
An electron is in an excited state when it momentarily possesses an energy level higher than its ground state. If an electron receives more energy, such as when it absorbs a photon, or packet, of light, or collides with an adjacent atom or particle, it can become excited.
The primary distinction between a system's ground state and excited state is that a system's ground state is any condition in which its electrons are at their lowest potential energy levels, whereas an excited state is any state in which they are at an energy greater than the system's ground state.
Thus option A is correct.
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The electron configurations [tex]\rm 1s^2\ 2s^2\ 3p^1[/tex], [tex]\rm 1s^2\ 2s^2\ 2p^4\ 3s^1[/tex], and [tex]\rm [Ar] 4s^2\ 3d^5\ 4p^1[/tex]
corresponds to excited states whereas [tex]1s^2\ 2s^2\ 3p^6[/tex] corresponds to ground state. The correct answer is option 2.
The electron configuration of an atom describes how its electrons are distributed among the various energy levels and orbitals.
The electron configuration [tex]\rm 1s^2\ 2s^2\ 3p^1[/tex] corresponds to an excited state. This configuration indicates that one of the electrons in the 2p orbital has been excited to a higher energy level.The electron configuration [tex]1s^2\ 2s^2\ 3p^6[/tex] is the ground state configuration of the noble gas argon (Ar).The electron configuration [tex]\rm 1s^2\ 2s^2\ 2p^4\ 3s^1[/tex]corresponds to an excited state. This configuration indicates that one of the electrons in the 3s orbital has been excited to a higher energy level.The electron configuration [tex]\rm [Ar] 4s^2\ 3d^5\ 4p^1[/tex]corresponds to an excited state. This configuration indicates that one of the electrons in the 4p orbital has been excited to a higher energy level.Therefore, the electron configurations [tex]\rm 1s^2\ 2s^2\ 3p^1[/tex], [tex]\rm 1s^2\ 2s^2\ 2p^4\ 3s^1[/tex], and [tex]\rm [Ar] 4s^2\ 3d^5\ 4p^1[/tex]correspond to excited states, while the electron configuration [tex]1s^2\ 2s^2\ 3p^6[/tex] is the ground state configuration of argon. Option 2 is the correct answer.
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An atom has 38 protons and 42 neutrons it is ?
Answer:
The answer is, Strontium
Answer:
Name Molybdenum
Atomic Mass 95.94 atomic mass units
Number of Protons 42
Number of Neutrons 54
Number of Electrons 42
Explanation:
What effect does mass have on force and acceleration?
Answer:
___________________________________________________________
The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.
___________________________________________________________
Find the molar enthalpy of formation for paraffin wax (C2H526)) given the following reaction
C2H526) + 38 026) ► → 25 CO26) + 26 H,O)
A H = -14 800 kJ
Answer: The molar enthalpy of formation for paraffin wax is -2460.5 kJ
Explanation:
The balanced chemical reaction is,
[tex]C_{25}H_{52}(g)+38O_2(g)\rightarrow 25CO_2(g)+26H_2O(g)[/tex]
The expression for enthalpy change is,
[tex]\Delta H=\sum [n\times \Delta H_f(product)]-\sum [n\times \Delta H_f(reactant)][/tex]
[tex]\Delta H=[(n_{CO_2}\times \Delta H_{CO_2})+(n_{H_2O}\times \Delta H_{H_2O})]-[(n_{O_2}\times \Delta H_{O_2})+(n_{C_{25}H_{52}}\times \Delta H_{C_{25}H_{52}})][/tex]
where,
n = number of moles
[tex]\Delta H_{O_2}=0[/tex] (as heat of formation of substances in their standard state is zero
Now put all the given values in this expression, we get
[tex]-14800=[(25\times -393.5)+(26\times -285.5)]-[(38\times 0)+(1\times \Delta H_{C_{25}H_{52}})][/tex]
[tex]\Delta H_{C_{25}H_{52}}=-2460.5kJ/mol[/tex]
Therefore, the molar enthalpy of formation for paraffin wax is -2460.5 kJ
What is Applied chemisrty??
Answer:
Applied Chemistry is the scientific field for understanding basic chemical properties of materials and for producing new materials with well-controlled functions. (:
Answer:
Explanation:
Applied Chemistry is the scientific field for understanding basic chemical properties of materials and for producing new materials with well-controlled functions. (:
Without completing the calculations, determine what the new pressure will be in the problem below. Also,
explain how you were able to determine the new pressure without completing the calculations. Pay special
attention to how the temperature is changing in the problem.
A sample of ozone (0:2) is stored at x kelvin and 12.5 Pa. If the temperature is doubled to 2x kelvin,
what will the new
pressure be?
The new pressure will be doubled
Further explanationGiven
A sample of ozone (O₃) at x K and 12.5 Pa. (T₁= x K, P₁=12.5 Pa)
the temperature is doubled to 2x K (T₂=2x)
Required
the new pressure
Solution
Gay Lussac's Law
When the volume is not changed, the gas pressure is proportional to its absolute temperature
[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]
Input the value :
[tex]\tt \dfrac{12.5}{x}=\dfrac{P_2}{2x}\\\\P_2=\dfrac{12.5\times 2x}{x}[/tex]
6.) 50.0 mol H2O
? molecules
3.01 × 10²⁵ molecules H₂O
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
50.0 mol H₂O
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[tex]\displaystyle 50.0 \ mol \ H_2O(\frac{6.022 \cdot 10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O} )[/tex] = 3.011 × 10²⁵ molecules H₂O
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
3.011 × 10²⁵ molecules H₂O ≈ 3.01 × 10²⁵ molecules H₂O
3.Write the chemical equation for the reaction when methane burns in (2)
(a) Sufficient supply of oxygen
(b) Insufficient supply of oxygen
Answer:
a)CH4 + O2 = CO2 + H2O
b)4CH4+5O=2CO+8H2O+2C
The_____form acidic compounds with hydrogen.
Answer:Halogens
Explanation:
I looked it up lol
PLEASE HELP I WILL GIFT 100 POINTS!!!!!
Answer:
Liquid A
Explanation:
the least dense will be at the top. like icecubes in water. the ice is less dense than the water so it floats
Answer:
Liquied A
Explanation:
It is at the top and it is the lightest if it is at the bottom then it has the most density
which conversion factor do you use first to calculate the number of grams of fecl3 produced by the reaction of 30.3 g of fe with ci 2?
Answer:
162.2g FeCl3/2mol FeCl3
Explanation:
Answer:
I would say D. 162.2gFeCl3 / 2 mol FeCl3
Explanation:
does the coefficient of linear expansion depend on length?l
Answer:
no
it doesnot beacuse it is independent of it's original length......
Is Na3PO3 soluble or insoluble in water and why?
Answer:
Na3Po3 is soluble in water
Sodium phosphite, often referred to as [tex]Na_3PO_3[/tex], is generally considered to be water soluble.
Because the sodium cation (Na+) has a significant affinity for water molecules due to their positive charge, sodium compounds generally have a tendency to be soluble in water. The three sodium ions increase the solubility of [tex]Na_3PO_3[/tex] and make it even more soluble.
The solubility of [tex]Na_3PO_3[/tex] is similarly affected by the phosphate ion [tex](PO^3^-)[/tex]. Phosphates are normally soluble in water unless they are coupled with cations that generate intractable compounds, like some heavy metal ions. The strong ion-dipole interactions between sodium ions and water molecules can be used to explain why [tex]Na_3PO_3[/tex] is soluble in water.
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If you keep heating a liquid, what happens to the energy of the particles in the liquid?
Answer:
theres gonna be more energy and some of the particles with a lot of energy will become vapor and evaporate
Explanation:
"If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid. The most energetic particles at the surface escape from the surface of the liquid as a vapor as it gets warmer. Liquids evaporate faster as they heat up and more particles have enough energy to break away."
Which statement correctly describes soil horizon C?
Answer:
Explanation:
It is the horizon that contains the least humus.
Which of the following measurements are recorded to three significant figures?
Select one or more:
a)0.003 L
b)140 g
c)1,610 s
d)0.0890 m
Answer:
c) 1610 s
d) 0.0890 m
Explanation:
Significant figures:
The given measurement have four significant figures 1234.
All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.
Leading zeros are not consider as a significant figures. e.g. 0.03 in this number only one significant figure present which is 3.
Zero between the non zero digits are consider significant like 104 consist of three significant figures.
The zeros at the right side when decimal point is present e.g 2400. are also significant. There are four significant figures are present.
a) 0.003 L
This measurement have 1 significant figure which is 3.
b) 140 g
This measurement have 3 significant figure 1, 4. In this measurement 0 is trailing zero that's why it is not consider significant.
c) 1610 s
This measurement have 3 significant figures 1, 6, 1.
d) 0.0890 m
This measurement have 3 significant figures 8,9 and 0
I DoNt CaRe....
BlA BlA BlA BlA
Answer?
Y r u singing?!?
Answer:OKEI
Explanation:im sorry for hatin but hatins what i do.i really need ma points so i can be respected more than u
A _____________ is formed when water empties into a lake or ocean
Answer:
a delta
Explanation:
he place where a river enters a lake, larger river, or the ocean is called its mouth. River mouths are places of much activity. As a river flows, it picks up sediment from the river bed, eroding banks, and debris on the water. ... When large amounts of alluvium are deposited at the mouth of a river, a delta is formed.
_____has particles with the greatest average kinetic energy
a
Ice water
b
Hot water
c
Warm water
d
Room temperature water
Answer:
c warm water
Explanation:
Kinetic energy is related to temperature. The molecules in a glass of warm water have more kinetic energy (they move faster – see Racing Molecules) than the molecules in a glass of cold water. The temperature of a substance is the average* amount of kinetic energy its molecules have.
Answer:
hot water
Explanation:
In the following image, atoms are represented by colored circles. Different colors represent different
types of atoms. If atoms are touching, they are bonded.
Which of the following boxes shows a mixture of elements and compounds?
A. D
B. C
C. B
D. A
PLS I NEED HELP ITS IMPORTANT I AM GIVING 25 POINTS HELP PLEASE. I NEED IT FAST
Why is it important for cells to be able to turn genes on and off? Select ALL Correct reasons!
Question 2 options:
A. so the cell is not too chaotic
B. so the cell can respond to the environment
C. so the cells can grow uncontrollably
D.so the cell does not waste energy
Answer:
B
Explanation: Since you need this quick, its because it needs to respond to the environment. I dont remember the exact term
how many molecules are in this formula. 4Mg3P2
Answer:
jajaja como le ago pa mandarte mensaje
PLZ HELP!
What would happen to work and power if the mass of the person walking was increased or decreased? EXPLAIN.
Answer:
work and power increases or decreases with the mass
Explanation:
My Teacher didn't teach us this please help
Answer:
first; why is it a question if teacher never teached you it LOL anyways..
Explanation:
i would say its the second one
"The smae quality of each element is present on both sides of the equation."
Please help me!
Will give the brainliest!
Please answer correctly.
Really urgent!!
Explanation:
1,a: I) group 2 = strontium
ii) chlorine
iii) nitrogen
B) i) strontium outer shell=2
ii)nitrogen:outer shell=5
iii) chlorine=7
C)metal
strontium
nickel
molybdenum
cesium
tin
non metal:..
chlorine
nitrogen
neon