longitudinal
all sound waves are longitudinal
A reversible reaction is said to be in equilibrium when
A)
all reactions stop leaving some reactant unused.
B)
the reaction goes to completion and no reactants are left.
9)
the rate of the backward reaction equals the rate of the forward reaction.
D)
the reaction rate of the backward reaction becomes larger than the rate of
the forward reaction.
Answer: C) the rate backward reaction equals the rate of the forward reaction.
Explanation:
How many protons are in an atom of tin?
Answer:
50
Explanation:
there are 50 protons in an atom of tin
Balance the following equation.
___ I + ___ O2 ___ I4O10
Question: Use the table to compare the solubilities of substances. Check all of the boxes that apply.
Answers:
Aspirin is less soluble than table salt, but more soluble than carbon dioxide.
A saturated solution of table sugar is more concentrated than a saturated solution of table salt.
Answer:
1,3
Explanation:
got it right on assignment
Answer: A, C and D
Explanation: For me it was D a well as of edge 2022. Hope this help!
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Answer:
Full moon
Explanation:
Went from cresent to half, meaning it should go to full moon next~
scientist have grouped the number of elements into
Answer:
columns and rows on the periodic table and groups based on reactivity and such like halogens,noble gases, trans metals, alkali metals, alkaline earth metals, lanthanids, actinids, metalliods, nonmetals and metals.
Explanation:
using the model, what is the mass of the atom pictured?
A) 3amu
B) 5amu
C) 7amu
D) 9amu
Answer:
A) 3amu
Explanation:
Please Help ASAP 100 points! Students set up a controlled experiment. They put five crickets in each of three identical containers. They set one container to 15C, one to 20C and one to 25C. Then they count the number of cricket chirps in each container during 1 hour. What are the TWO constants in this experiment? A: The number of crickets in each container. B:The temperature of each container. C: The number of cricket chirps. D: The kind of containers used.
Answer:
A and C.
Explanation:
Below is the balanced equation for the production of methane. Use it to explain how the law of conservation of matter is upheld in the decomposition of organic trash. 4C2H5O2N + 2H2O → 3CH4 + 5CO2 + 4NH3 Glycine + Water yields Methane + Carbon dioxide + Ammonia
Answer:
See explanation
Explanation:
A balanced equation demonstrates the conservation of mass because the same number of of atoms of each element is found on both sides of the reaction equation.
This goes a long way to establish that mass or matter can neither be created nor destroyed but may be transformed from one form to another.
Looking at this balanced reaction equation;
4C2H5O2N + 2H2O → 3CH4 + 5CO2 + 4NH3
There are eight carbon atoms on both sides of the reaction equation
There are 24 hydrogen atoms on both sides of the reaction equation
There are 10 oxygen atoms on both sides of the reaction equation
There are four nitrogen atoms on both sides of the reaction equation
Hence, the law of conservation of matter is upheld in the decomposition of organic trash.
The balanced equation for the production of methane:
[tex]4C_2H_5O_2N + 2H_2O ----> 3CH_4 + 5CO_2 + 4NH_3[/tex]
Balanced chemical equation:A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side. According to the law of conservation of mass, when a chemical reaction occurs, the mass of the products should be equal to the mass of the reactants.
From given balanced equation for the production of methane:
[tex]4C_2H_5O_2N + 2H_2O ----> 3CH_4 + 5CO_2 + 4NH_3[/tex]
There are 8 carbon atoms, 24 hydrogen atoms, 10 oxygen atoms and 4 nitrogen atoms on both sides of the reaction equation, i.e. equal number of atoms on both reactants and products side.
Hence, the law of conservation of matter is upheld in the decomposition of organic trash.
Find more information about Balanced chemical reaction here:
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Señalar la opción correcta El primer alcalino y el primer gas noble tienen la misma cantidad de niveles ocupados El primer alcalinotérreo tiene 2 e en su CEE El cuarto halógeno tiene 5 electrones de valencia
Answer:
El primer gas alcalino y el primer gas noble tienen el mismo número de niveles ocupados. Cierto.
La primera tierra alcalina tiene 2 e en su CEE. Cierto.
El cuarto halógeno tiene 5 electrones de valencia. Falso.
Explicación:
El primer alcalino y el primer gas noble tienen el mismo número de niveles ocupados porque el primer alcalino tiene 1 electrón y solo tiene una capa, mientras que el gas noble tiene 2 electrones y también tiene una capa. El primer alcalinotérreo tiene 2 e en su CEE debido a la presencia en el segundo grupo en la tabla periódica. El cuarto halógeno no tiene 5 electrones de valencia en su capa más externa, tiene 7 electrones en su capa más externa debido a la presencia en el grupo de siete de la tabla periódica.
PLEASE HELP ME I NEED IT TO BRING MY GRADE UP
Answer:
the attached file
Explanation:
The potassium is an alkali metal which explode in water to produce base and hydrogen gas. The balancing came from the fact that each side needed the same number of hydrogens so I made the products have 4 (the lowest even number) then put the appropriate coefficients in the reactants to make that work. Since there are two molecules of potassium hydroxide there also needed to be 2 atoms of potassium in the reactants.
What are two reasons that someone would want to become a scientist?
1 point
Your answer
Liquid or solid water that falls to the ground is called
In the rock cycle, the process of weathering and erosion happens between:
Sedimentary and Metamorphic
Igneous rock and metamorphic rock
Igneous rock and sediments
. Classify each of the organisms in Figures 2 and 3 as
herbivore, carnivore, or omnivore. Explain your
classifications.
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Answer:
Herbivore, Omnivore & Carnivore
Explanation:
Herbivore they eat grass, Omnivores eat fruits and vegetables & Carnivores eat meat or flesh so that's why herb then omni and last carni bc so omni and herbi eat like the same thing
Answer:
Herbivore, Omnivore & Carnivore
Explanation:
Question 20 (1 point)
The chemical formula for glucose, a simple sugar, is CH1206. The formula for ethanol is CzH60. What
accounts for the differences in these compounds?
Answer:
A. The ratio of the element in glucose is different than in ethanol
Explanation:
The compounds given are;
Glucose C₆H₁₂O₆
Ethanol C₂H₆O
The two compounds given are different from one another. But they have the same elemental composition.
Ethanol is made up of Carbon, hydrogen and Oxygen and so also, Glucose
Now,
The number of atoms in both compounds are different;
Number of atoms
C H O
Glucose 6 12 6
Ethanol 2 6 1
What is the name of an element that has a full octet?
Answer:
noble gases
The noble gases rarely form compounds. They have the most stable configuration (full octet, no charge), so they have no reason to react and change their configuration. All other elements attempt to gain, lose, or share electrons to achieve a noble gas configuration
Explanation:
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What would be the mass, in grams, of 1.505 x 10^23 molecules of carbon disulfide (CS2)?
To Find :
The mass, in grams, of [tex]1.505 \times 10^{23}[/tex] molecules of carbon disulfide (CS₂).
Solution :
Molecular mass of CS₂ = 76 gm/mol .
It means that mass of [tex]6.022 \times 10^{23}[/tex] molecules of CS₂ is 76 gm/mol.
Let, mass of [tex]1.505 \times 10^{23}[/tex] molecules of carbon disulfide (CS₂) is x.
So,
[tex]x= 76\times \dfrac{1.505 \times 10^{23}}{6.022\times 10^{23}}\\\\x = 76 \times \dfrac{1.505}{6.022}\\\\x = 19 \ gm[/tex]
Therefore, the mass in gram is 19 gm.
Carbonate is a polyatomic ion whose oxidation number is -2. How many carbonate ions would be required to bond with aluminum in a neutral ionic compound?
Answer: Three carbonate ions are required to bond with aluminum in a neutral ionic compound.
Explanation:
An ionic compound is defined as the compound that is formed by the complete transfer of electrons takes place from one atom (forming cation) to another atom (forming anion).
A neutral ionic compound does not carry any charge on it.
As we know, aluminum is a trivalent atom having valency 3 and forms [tex]Al^{3+}[/tex] ion and carbonate is a divalent polyatomic ion having formula [tex]CO_3^{2-}[/tex].
They both combine to form a neutral ionic compound named aluminum carbonate.
By criss cross method, the chemical formula of aluminum carbonate is [tex]Al_2(CO_3)_3[/tex]
Hence, three carbonate ions are required to bond with aluminum in a neutral ionic compound.
What are all the secrets to the universe ?
How many moles of water could you make with 0.5 mol of H2?
Answer:
0.5 mols of water
Explanation:
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Answer:
Which nuclear force holds the nucleus together against the mutual repulsion of the protons in every nucleus larger than Hydrogen’s?
Explanation:
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What is a buffer made from?
A buffer is made from an acid - base conjugate pair as shown by option A
What is a buffer?Buffers are often composed of weak acids and their conjugate bases (or weak bases and their conjugate acids). The weak acid can contribute a proton to balance any new base, whereas the conjugate base can absorb a proton to do so.
This balance between the acid and its conjugate base allows the buffer to survive pH changes. Buffers are essential in biological systems because many biochemical processes are particularly sensitive to pH changes.
Learn more about buffer:https://brainly.com/question/31847096
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how does atomic radius affect coulombic attraction?
Answer:
The bigger the size of the atom, the electrons, especially the valence electrons are further away from the nucleus. The nucleus is not able to pull the electrons, that are in orbitals further away from the nucleus, towards itself and the coulombic attraction decreases.
Explanation:
Consider a 0.10 M solution of a weak polyprotic acid (H2A) with the possible values of Ka1 and Ka2 given below. Calculate the contributions to [H3O+] from each ionization step. Ka1=1.0×10−4;Ka2=5.0×10−5
Answer:
The first dissociation occurred at 0.00311 M and the second at 0.0000484 M.
Explanation:
From the given information:
The ICE table can be computed as follows:
H2A → HA⁻ + H⁺
Initial 0.10 0 0
Change -x x x
Equilibrium 0.10 - x x x
[tex]Ka_1 = \dfrac{[HA^-][H^+]}{[H_2A]}[/tex]
[tex]1.0\times 10^{-4}= \dfrac{[x][x]}{[0.10-x]}[/tex]
[tex]1.0\times 10^{-4}= \dfrac{(x)^2}{(0.10-x)}[/tex]
By solving for x;
x² = (1.0 × 10⁻⁴ × 0.1)
x = [tex]\sqrt{1\times 10^{-5}}[/tex]
x = [H⁺] =[HA⁻] = 0.00311 M
The acid then further its dissociation again, So;
The ICE table can be computed as follows:
HA⁻ → A⁻ + H⁺
Initial 0.00311 0 0.00311
Change -x x x
Equilibrium 0.00311 - x x 0.00311 + x
[tex]Ka_2 = \dfrac{[A^-][H^+]}{[HA]}[/tex]
[tex]5.0 \times 10^{-5} = \dfrac{(0.00311+x)x}{(0.00311-x)}[/tex]
By solving for x;
x = [H⁺] = 0.0000484 M
Therefore, the first dissociation occurred at 0.00311 M and the second at 0.0000484 M.
Why is sublimation such a critical component for the water cycle in cold climates?
Answer:
Sublimation is the transition in physical state from solid (ice) to vapor with no intermediate liquid stage. In other words, the ice becomes water vapor without melting. Ideal weather conditions would be low humidity (to allow vaporization), high altitude (lower air pressure facilitates the transition), and strong sunlight (to provide the energy for the transition). High snow-packed mountain ranges offer all of these conditions. Since the temperature is too cold for evaporation, sublimation is needed to provide enough water vapor to feed the water cycle and promote precipitation elsewhere on the planet. Without it, the water would stay frozen in the snow and ice and reduce the amount of liquid water that would replenish the planet.
Explanation:
plato
8 grams of hydrogen and 32 grams of oxygen will combine to form how many grams of water?
Answer:
9 grams of water
Explanation:
Form a bond: Each electron has a charge of 1–, and each proton has a charge of 1+. You can calculate the charge of an atom by subtracting the number of electrons from the number of protons. Move an electron from the sodium to the chlorine atom.
1. Sodium has a charge of 1+ and chlorine has a charge of 1-
2. Chlorine has a charge of 1+ and sodium has a charge of 1-
3. Both atoms have a charge of 1+
4. Both atoms have a charge of 1-
Answer:
1. Sodium has a charge of 1+ and chlorine has a charge of 1-
Explanation:
Sodium has 11 protons and 11 electrons. If you remove one electrons we now have only 10 electrons.
Hence; number of protons - number of electrons = 11 - 10 = +1
Sodium has a charge of +1
Chlorine has 17 electrons and 17 protons. if it gains 1 electron then it now has 18 electrons.
Hence; number of protons - number of electrons = 17 - 18 = -1
Chlorine has a charge of -1
H to I in the diagram indicates two layers of:
A. phospholipids
B. gated channel proteins
C. pore proteins
D. cholesterol