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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:
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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Which of the following elements is the least reactive metal? Sodium, Rubidium, Chlorine, and Magnesium.
Answer:
Magnesium
Explanation:
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The arrow in a chemical equation represents the ________________ _________________
What are all the secrets to the universe ?
Which of the following atoms has the highest first
ionization energy?
a. helium
6. potassium
d. hydrogen
e. carbon
Answer:
Helium
Explanation:
The first ionization energy varies in a predictable way across the periodic table.
what are the names of these compounds??
CCI4
K2O
Answer:
CCI4 Carbon tetrachloride
K2O Potassium oxide
Explanation:
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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Balance the following equation.
___ I + ___ O2 ___ I4O10
What is the name of the family with an oxidation number of +2?
a. Halogens
b. Alkali Earth Metals
c. Noble Gasses
d. Transition Metals
Answer:
Alkali Earth Metals
Explanation:
The oxidation number is equal to the charge which is determined by the valence electrons. Alkali Earth Metals all have 2 valence electrons and, therefore, an oxidation number of 2.
Answer:
+2alkaline earth metal and +1 oxidation number is alkali metal
Explanation:
alkali is Arabic word means ash
A double replacement reaction is a reaction in which one element replaces a similar
element within a compound. (2 points)
True
False
Answer:
false
Explanation:
in a double reaction, the negative ions switch places. not be replaced.
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:
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
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:
In the rock cycle, the process of weathering and erosion happens between:
Sedimentary and Metamorphic
Igneous rock and metamorphic rock
Igneous rock and sediments
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Answer:
c
Explanation:
2. DETERMINE THE TEMPERATURE AT
WHICH NIO GRAMS OF POTASSIUM
NITRATE DISSOLVE IN 100 GRAMS OF
WATER
Answer:
20 degrees Celsius
Explanation:
atoms are so small that approximately _______ of them can fit at the end of a needle?
Answer:
5 million million atoms can fit at the end of a needle
Answer:
Let's just say 5 million million hydrogen atoms could fit at the end of a needle.
Explanation:
Atoms are 100 picometers, and to compare, the amount of even 1 centimeter, a calculator can't even figure out how many picometers are in a centimeter because there is just too much picometers.
How many moles of water could you make with 0.5 mol of H2?
Answer:
0.5 mols of water
Explanation:
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.
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:
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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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If the statement is true, select True. If it is false, select False.
The forces between molecules are much stronger than the forces between ions.
True
False
The forces between molecules are much stronger than the forces between ions.
➜ True
The actual relative strengths will vary depending on the molecules involved. Ionic bonding and covalent bonding will always be stronger than intermolecular forces in any given substance.
Is iron rusting a chemical reaction? Explain why or why not.
Answer: Yes- Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Iron and steel rust when they come into contact with water and oxygen – both are needed for rusting to occur. Rusting is an example of a chemical change. A chemical property describes the ability of a substance to undergo a specific chemical change. A chemical property of iron is that it is capable of combining with oxygen to form iron oxide, the chemical name of rust.
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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!
What is the redox reaction? And how does the redox reaction happen inside batteries?
Answer:
It is called a reduction-oxidation, oxide-reduction reaction, or simply as a redox reaction, any chemical reaction in which one or more electrons are transferred between the reactants
Redox battery is an example of both a Flow Battery and a two electrolyte system.In this case, it depends on two different active aqueous electrolytes of vanadium dissolved in sulfuric acid separated by a membrane at which ionic interchange takes place.
Thats my opinión though.
H to I in the diagram indicates two layers of:
A. phospholipids
B. gated channel proteins
C. pore proteins
D. cholesterol
What is atomic mass made of?
Answer:
Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.
Explanation:
. 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: