Answers
The correct definition of oxidation in terms of oxygen, electron and hydrogen is added, lost , lost, (Row B).
What is an oxidation reaction?An oxidation reaction is a reaction in which the oxidation number if the reacting species increases in a positive direction.
Oxidation can be defined in terms of oxygen as the addition of oxygen. Oxidation can be defined in terms of electron as removal of electron Oxidation can be defined in terms of hydrogen as removal of hydrogen.Therefore, the correct definition of oxidation in terms of oxygen, electron and hydrogen is added, lost , lost, (Row B).
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Related Questions
.
unen a person gets too hat, his or her body will begin to
Swee
until the body's temperature is back
to normal. In sentences explain why this is an example of
homeostasis.
Drow a picture of the body's reaction to being too hot.
Answers
If 4.5 moles of nitric acid falls into 8000 L of pure water, what will be the change of the pH of the solution? Show all of your work for full credit. (Note that nitric acid dissociates completely and puts in one hydrogen ion for each molecule of nitric acid).
*due soon*
Answers
Answer:
3.24
Explanation:
It is known that nitric acid is a strong acid, so it will dissociate completely, resulting in [tex]H^+[/tex] and [tex]NO_3^-[/tex] ions being present in solution. We also know that pure water has a neutral pH due to the chemical equilibrium of [tex]H_2O(l)[/tex] ⇄ [tex]H^+(aq) + OH^-(aq)[/tex] signifying equal parts of hydrogen and hydroxide ions.
Now, we must convert from 4.5 moles of nitric acid to moles of hydrogen. This can be accomplished using unit conversions and the chemical dissociation equation [tex]HNO_3(s) - > H^+(aq) + NO_3^-(aq)[/tex]
[tex]4.5molHNO_3 * \frac{1 mol H}{1 mol HNO_3} = 4.5molH+[/tex]
Then, using the pH equation [tex]-log[H+] = pH[/tex] and the formula for molarity [tex]M = \frac{g}{L}[/tex], we can find the value of [tex][H^+][/tex] and in turn the pH of the resulting solution. Keep in mind that both answers for grams of the hydrogen ion and molarity of the hydrogenion should have two significant figures.
[tex]4.5mol H^+ * \frac{1.01gH^+}{1 mol H^+} = 4.6g H^+\\\frac{4.6gH^+}{8000L sol} = 5.8*10^{-4} M H^+[/tex]
Now the pH equation may be used.
[tex]-log(5.8*10^{-4}) = 3.24[/tex]
Note that logarithmic significant figures dictate that the logarithm of a number with x significant figures will result in a value with x digits after the decimal point, meaning that this answer will have two digits after the decimal point and three significant figures.
What is the molar mass of NaCl? If you need to add 0.2 moles of NaCl to 500 mL of water, how many grams of NaCl do you need to add?
Answers
Answer:
321 g
Explanation
All you need to know here is that the molarity of a solution tells you the number of moles of solute present in exactly
1 L
of the solution.
In your case, a
2.20-M
sodium chloride solution will contain
2.20
moles of sodium chloride, the solute, for every
1 L
of the solution.
So if every
1 L
of this solution must contain
2.20
moles of sodium chloride in order for the solution to have a molarity of
2.20 M
, it means that
2.50 L
of this solution must contain
2.50
L solution
⋅
2.20 moles NaCl
1
L solution
=
5.50 moles NaCl
To convert the number of moles of sodium chloride to grams, use the molar mass of the compound.
5.50
moles NaCl
⋅
58.4 g
1
mole NaCl
=
321 g
−−−−−
The answer is rounded to three sig figs.
Use the drop-down menus to complete each of the sentences. isotopes behave similarly in . involve only a rearrangement of electrons, and do not involve changes in protons or neutrons. in , a large amount of energy is released or absorbed. new elements can be formed as a result of . exothermic and endothermic reactions can occur during .
Answers
Isotopes show similarity in chemical properties, and in exothermic reaction heat is released and in endothermic reaction heat is absorbed.
What are chemical reactions?
Chemical reactions are those reactions in which reactants combine with each other for the formation of products.
Isotopes are those species in which atomic masses are different and having the same atomic number and all are having the same chemical properties.Chemical reactions are those reactions in which change in electrons takes place for the formation of new compound, but changes in neutron and proton does not takes place.A large amount of energy is absorbed or released during a nuclear reaction when nucleus is split into radiations.Exothermic reactions are those in which heat is released and endothermic reactions are those in which heat is absorbed.Hence correct explanations are given above.
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Answer:
1. Top (Chemical)
2. Top (Chemical)
3. Middle (Nuclear)
4. Middle (nuclear)
5. Bottom (Both)
Explanation:
How many liters do you need to make a 1.2 M solution using 54.4 grams of copper (II) fluoride?
Answers
Answer:
Our differences make us special.
Explanation:
Which law does the equation below represent? Mass reactants = Mass products
Answers
Answer:
law of conservation of mass
Explanation:
The law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products.
Science question, Giving brainiest!
Answers
Answer:
im not 100% sure but i think it is :A
Explanation:
How many molecules of nitrogen gas are found in 0. 045 L of nitrogen gas at STP?
Answers
Answer:
See below
Explanation:
.045 liter / 22.4 l / mole * 6.022 x 10^23 molecules/mole * 2 atoms/molecule =
( * 2 becuase nitrogen gas is diatomic)
Consider the balanced reaction
below:
P2O3 + 3H2O → 2H3PO3
How many grams of diphosphorus
trioxide, P203, are required to
produce 10.2 moles of phosphorous
acid, H3PO3?
Answers
Answer:
561 [gr.].
Explanation:
try the option suggested in the attached picture. The answer is underlined with orange colour.
Describe what the Sim evidence shows you about attraction. Remember to use the words attraction, freedom of movement, kinetic energy, and overcome in your response
Answers
During change of phase, the molecules of a substance acquire enough kinetic energy to overcome the forces of attraction between its molecules.
What is change of phase?Change of phase occurs when a substance acquires enough energy to overcome the forces of attraction between its molecules to transition from one state of matter to another.
During a change of phase, kinetic energy of the molecules of the substance increases due to the application of heat, and the freedom of movement of the molecules increases.
Change of phase can occur as follows;
from solid to liquid and vice versafrom solid to gas and vice versafrom liquid to gas and vice versaTherefore, during change of phase, the molecules of a substance acquires enough kinetic energy to overcome the forces of attraction between its molecules leading to increased freedom of movement of the molecules.
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Answer:During change of phase, the molecules of a substance acquire enough kinetic energy to overcome the forces of attraction between its molecules.
What is change of phase?
Change of phase occurs when a substance acquires enough energy to overcome the forces of attraction between its molecules to transition from one state of matter to another.
During a change of phase, kinetic energy of the molecules of the substance increases due to the application of heat, and the freedom of movement of the molecules increases.
Change of phase can occur as follows;
from solid to liquid and vice versa
from solid to gas and vice versa
from liquid to gas and vice versa
Therefore, during change of phase, the molecules of a substance acquires enough kinetic energy to overcome the forces of attraction between its molecules leading to increased freedom of movement of the molecules.
Explanation:
Which type of radiation does not cause a change in the atomic number of the atom?
Answers
Answer:
Gamma radiation. Explanation: Gamma radiation produces not only the least change in mass and atomic numbers, but produces no change in mass number, atomic number, or electric charge. Both alpha and beta radiation do produce these changes.
2. How many moles of carbon dioxide, CO2, are in a 22 gram sample of the compound?
Answers
molar mass of CO2 = 44.01 g
22g / 44.01 = 0.50 moles CO2
If 45.0 mL of a 4.00 M sodium sulfate (Na2SO4) solution is used for a reaction, how many moles of solute were present in the solution?
____ moles
Answers
In the equation:
4NH3 + 502 → 4NO + 6H2O
Find the volume of oxygen that reacts with 1. 12 L of NH3.
0 0,896 L
O 1. 4L
01. 12 L
O 5. 6L
Answers
Answer:
1.4 l
Explanation:
Assuming they are the same temperature
5/4 = O/1.12
1.12 * 5/4 = L of O2 = 1.4 l
What is the difference between saturated fat and trans fat?
Answers
Answer:
The main difference between trans fat and saturated fat is that trans fat raises low-density lipoprotein (LDL) levels and drops high-density lipoprotein (HDL) levels in the blood whereas saturated fat raises both LDL and HDL levels in the blood.
Explanation:
Stay safe fam :)
how to calculate amount of copper obtained from a reaction
Answers
Answer:
22g of copper?
Explanation:
If 40 grams of NaCl was dissolved in 100 grams of water at 100 degrees Celsius, the solution would be.
a. ) saturated
b. )unsaturated
c. )supersaturated
d. )saturated with excess
Answers
Answer:
saturated solution
Explanation:
4 NO(g) + 2 O2(g) = 2 N20468)
Answers
Answer:
The equilibrium concentrations are [N₂O] = 1.00 mol/L; [O₂] = 0.50 mol/L; [NO] = 1.00 mol/L. Kc = 2.0.
Explanation:
First, write the balanced chemical equation with an ICE table.2N₂O + O₂ ⇌ 4NOI/mol·L⁻¹: 0; 0; 3.00C/mol·L⁻¹: +2x; +x; -4xE/mol·L⁻¹: 2x; x; 3.00 - 4xAt equilibrium, [N₂O] = 2x mol/L= 1.00 mol/L.So x = 0.50Then [O₂] = x mol/L = 0.50 mol/Land [NO] = (3.00 - 4x) mol/L = (3.00 – 4×0.50) mol/L = 1.00 mol/LKc=[NO]4[N2O]2[O₂]=1.0041.002×0.50 = 2.0
Chloroplasts and mitochondria are both involved in energy conversion in eukaryotic cells and share many similarities. Differentiate between chloroplasts and mitochondria. Choose ALL of the characteristics that apply ONLY to mitochondria.
A) Mitochondria need water and oxygen.
B) Mitochondria are only found in animal cells.
C) Mitochondria convert glucose into ATP energy.
D) Mitochondria have a double membrane and their own DNA.
E) Mitochondria require oxygen and release carbon dioxide.
Answers
Answer:
The answer is C and E
Explanation:
I just had that question
Answer:
c and e
Explanation:
A volatile liquid is one that choose. Quickly so it transitions easily into the choose. Phase.
Answers
A volatile liquid is one that reacts quickly so it transitions easily into the ground energy state phase.
Ground energy state refers to the state in which is achieved by something burning all of it's potential energy, so that it is in equilibrium. As an example, an apple falling to the ground from a tree . this is because until it hits the ground, it has potential or otherwise some form of energy to burn, disturbing it's equilibrium.
What is the mass defect?
A. It is seen as an increase in the masses of daughter elements.
B. It is identified as a missing line on an absorption spectrum.
O C. It is the difference between measured mass and average isotope
mass.
D. It is the difference between nuclear mass and the mass of its
components.
SUB
Answers
Mass defect is define as the difference between nuclear mass and the mass of its components.
What is mass defect?As the name suggested that defect in mass of any substance given idea about the mass defect and it will be define as the difference between the atomic mass of an atom and sum of the masses of all constitute particles present inside the nucleus.
Mass of daughter nuclei will take in consideration when only nuclear reaction takes place.Missing line of absorption is not related to the mass, else it is related to the concentration.Difference between measured mass and average isotope is not considered in mass defect because it is calculated for the individual atom not for all isotopes of that atom.Hence it is the difference between nuclear mass and the mass of its
components.
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19. What is the new volume of a solution that is created when 4. 2 mL of a 9. 1 M NaOH stock solution is diluted to a concentration of 2. 8 M? (M1V1 = M2V2 )
A) 6. 0 mL
B) 7. 38 mL
C) 10. 1 mL
D) 13. 65 mL
Answers
Answer:
A 6.0
Explanation:
Nya has a cup of hot tea that she lets cool down for several minutes. what effect does cooling have on the tea? its particles have less kinetic energy. its particles have more kinetic energy. its specific heat increases. its specific heat decreases.
Answers
Nya has a cup of hot tea that she lets cool down for several minutes so effect of cooling on the tea is that its particles have less kinetic energy.
What is the relation between temperature and K.E.?Relation between the kinetic enegy and temperature of any substance will be represented as:
K.E ∝ 3/2kT
From the above realation it is clear that kinetic energy is directly proportional to the temperature of the substance. So when a cup of tea cool down its temperature decreases as a result of which kinetic energy of particles present in cup of tea also decreases.
Specific heat dependence on temperature is very weak as compared to K.E. so it will be negligible.
Hence particles of tea have less kinetic energy.
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Answer:
Its particles have less kinetic energy.
Explanation:
Please help me on this question
Answers
Covalent compounds are prevalent in nature and are the primary structure of most organisms. Based on the periodic table, which pair of elements would most likely form a covalent bond?
boron (B) and carbon (C)
aluminum (Al) and silicon (Si)
carbon (C) and oxygen (O)
magnesium (Mg) and sulfur (S)
Answers
Based on the periodic table and due to their nonmetallic nature, carbon (C) and oxygen (O) form covalent bonds.
What is a covalent bond?A covalent bond is a type of chemical bond in which elements share electrons. It is formed between nonmetals.
Based on the periodic table, which pair of elements would most likely form a covalent bond?
boron (B) and carbon (C). B is a metalloid and C a nonmetal, so they don't form covalent bonds.aluminum (Al) and silicon (Si). Al is a metal and Si a metalloid, so they don't form covalent bonds.carbon (C) and oxygen (O). Both C and O are nonmetals, so they do form covalent bonds.magnesium (Mg) and sulfur (S). Mg is a metal and S a nonmetal, so they don't form covalent bonds.Based on the periodic table and due to their nonmetallic nature, carbon (C) and oxygen (O) form covalent bonds.
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What is the pressure, in atmospheres, of 14.3 moles of a gas at a temperature of 485 K in a 187 liter container?
P
V
=
n
R
T
R = 0.0821
a
t
m
⋅
L
m
o
l
⋅
K
Answers
Answer:
3.04 atm
Explanation:
First note r is in l*atm/mole*K
PV=nRT
P = nRT/V = 14.3(.0821)(485)/187 = 3.04 atm
Which is NOT a blood type?
A
B
C
O
Answers
there is no answer to your question because all of the options ARE blood types so there is no telling.
Every winter, many individuals tragically die in their sleep due to faulty heaters that leak carbon monoxide (CO) during the night. How does CO poisoning lead to death
Answers
Answer:
When too much carbon monoxide is in the air, your body replaces the oxygen in your red blood cells with carbon monoxide.
Explanation:
This can lead to serious tissue damage or even death. As you mentioned.
When discussing distances between objects in the solar system, which term do you use?
Actual distance
Apparent brightness
Relative brightness
Relative distance
Answers
Answer: (D) Relative Distance
Explanation:
.
What best describes the hydrogen atom in a bond such as H-CI?
Answers
Answer:
a. a part of ionic bond with Cl