In redox reactions, electrons are ____.
A)shared
B)lost
C)transferred
D)not needed
Answers
Answer:
C
Explanation:
This is the only option that gives the right option as in redox reaction electron are lost and gained by different atoms. Not shared or not needed are not right
Related Questions
How do I solve this?
Answers
Answer:
All of the answers are examples of combustion reactions
Explanation:
Carbon, hydrogen and oxygen are the main elements you want to look for in combustion, I think.
Which tool is used to measure an object’s mass?
A. Graduated cylinder
B. Meter stick
C. Digital thermometer
D. Electronic balance
Answers
Are things on fire or is fire on things?
Answers
Answer:
It will depend on the situation to call it either way
Explanation:
Global warming is an ongoing issue for debate. True or False? Question 2 options: True False
Answers
Answer:
(True) The answer to that is yes, global warming is a hotly debated topic.
Explanation:
As a matter of political controversy, global warming is often viewed from different political perspectives. Which is why it is still an issue. (In 1988, global warming became a topic of discussion.) A number of climate change-related phenomena are occurring due to climate change, including rising temperatures, droughts and wildfires, changing precipitation patterns, glaciers melting, and rising sea levels.
Hope this helps! :D
True
Explanation:
It is because global warming is a common issue that people debate.
Wind power was first used in the 1970s.
A. true
B. false
Answers
Answer:
B. false
Explanation:
Answer:
B (false)
Explanation:
Because, the earliest recorded evidence of wind energy being used dates to around 5000 BC in Egypt, where the sail was invented to catch the wind and propel boats along the River Nile
what the similarities are between solid, liquid and gas particles of water.
Answers
How many outer atoms and lone pairs are present in a molecule with a trigonal pyramidal shape?.
Answers
Answer:
3 outer atoms and 1 lone pair
In general, explain the difference between dietary fiber carbohydrates and sugar carbohydrates?
Answers
Answer:
Made up of glucose but passes through the body without being digested
Explanation:
Fiber: Made up of glucose but passes through the body without being digested. Sugar Alcohols: Not made up of glucose, therefore, they don’t directly affect blood glucose levels and are only partially digested. Although fiber is a carbohydrate, your body doesn’t digest it the same way.
The pH of a solution is 8.43. What is the hydronium ion H30* concentration?
Answers
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydronium ion concentration.
Ph=-logH3O+
Putting in the values:
8.43=-log[H3O+]
[H3O+]=10^-8.43=3.7*10^-9
Thus H3O+ concentration is 10^-8.43
A sample of crushed rock is found to have 4. 81 x 10^21 atoms of gold, how many moles of gold are present in this sample?
A. 7. 99 x 10^-3 moles
B. 1. 57 x 10^-1 moles
C. 1. 25 x 10^3 moles
D. 2. 47 x 10^5 moles
Answers
Answer:
A
Explanation:
Recall that a mole of any substance contains 6.02 × 10²³ amounts of that substance.
In other words, a mole of gold atoms contains 6.02 × 10²³ gold atoms.
Hence, by dimensional analysis, we have that:
[tex]\displaystyle 4.81\times 10^{21} \text{ Au} \cdot \frac{1\text{ mol Au}}{6.02\times 10^{23} \text{ Au}} = 7.99\times 10^{-3} \text{ mol Au}[/tex]
Therefore, there is about 7.99 × 10⁻³ moles of gold present in the sample.
In conclusion, the answer is A.
What are economic challenges that governments must face? check all that apply. threats of war unemployment low production inflation low voter turnout
Answers
The economic challenges that government must face are unemployment, low production, and inflation.
What are economic challenges?Economic challenges are problems related to the production of goods and services to satisfy unlimited wants.
Thus, the correct options are 2. Unemployment.
3. low production.
4. inflation.
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Answer:
B,C,D
Explanation:
took the test
4. Compare and contrast the 2 reactions below and balance the reactions. Which reaction is
endothermic and which reaction is exothermic?
Answers
The first reaction is exothermic reaction because it release energy whereas the seocond equation is endothermic reaction due to absorption of energy.
Endothermic Reaction
The energy is absorbed from the surrounding environment in susch type of reaction. Energy is absorbed in the form of heat.
Exothermic ReactionThe energy is released from the reaction to its environment in this type of reaction. Energy is released as heat, electricity, light or sound.
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Hello people ~
What are the most key factors of solid-state reactions?
a) Size of the particles
b) Mechanical properties of solids
c) Thermodynamic and kinetic factors
d) Environmental factors
Answers
Answer:
A and C
Explanation:
Size of the particles
It's denoted to surface area which is key factor of solid state reaction,higher the size late the reaction occursThermodyanmic and kinetic factors
the reaction depends upon temprature and rest factors like light , humidity etc
Answer:
Option AOption CExplanation:
What are Solid State Reactions ?
The reactions that are performed in the absence of solvents either by melting/grinding the materials together at the beginning of the reaction or by adding heat to the reaction are known as solid-state reactions Solid-state reactions are preferred because they reduce the generation of chemical wastes and costFactors
They depend on thermodynamic and kinetic factors, as mentioned before, heat is addedSize of the particles is also important because the rate of the reaction depends on the sizeNatural factors such as pressure, temperature, presence of sunlight, etc.How many moles of oxygen are necessary to generate 28 moles of water, according to the following equation: 2H2+O2→2H2O
Answers
The number of moles of oxygen required to generate 28 moles of water from the reaction is 14 moles
Balanced equation2H₂ + O₂ —> 2H₂O
From the balanced equation above,
2 moles of water were obtained from 1 mole of oxygen
How to determine the mole of oxygen neededFrom the balanced equation above,
2 moles of water were obtained from 1 mole of oxygen
Therefore,
28 moles of water will be obtained from = 28 / 2 = 14 moles of oxygen
Thus, 14 moles of oxygen are needed for the reaction
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Which beaker has the least thermal energy?
A. Beaker D
B. Beaker A
C. Beaker B
D. Beaker C
Answers
Answer:
________________________________
✏️ QUESTION:which doctor has the least thermal energy?
A. beaker D
B. beaker A
C.beaker B.
D. beaker C
________________________________
✏️ ANSWER:A. beaker D..
________________________________
#LetsEarthBreath
The effective temperature of a star is related to its..
solar system.
luminosity.
absolute magnitude.
color.
Answers
Answer:
color
Explanation:
The effective temperature is directly related to the color of the star: the higher the temperature, the bluer the light emitted by the star.
When balanced, which equation would have the coefficient 3 in front of any of the reactants? zn hcl zncl2 h2 h2so4 b(oh)3 b2(so4)3 h2o fe agno3 fe(no3)2 ag c2h4o2 o2 co2 h2o
Answers
The balanced equation which have the coefficient 3 in front of any of the reactants is 3H₂SO₄ + 2B(OH)₃ → B₂(SO₄)₃ + 3H₂O.
What are balanced equation?Those chemical equations in which number of each atoms pesent in reactant side as well as on product side is always equal to each other.
Let us consider the balanced equations for the given chemical reactions are:
Zn + HCl → ZnCl₂ + H₂Balanced form of the above reaction will be written as Zn+2HCl → ZnCl₂+H₂ where all atoms are present in equal quantity.
H₂SO₄ + B(OH)₃ → B₂(SO₄)₃ + H₂OBalanced form of the given reaction will be written as 3H₂SO₄ + 2B(OH)₃ → B₂(SO₄)₃ + 3H₂O, where coefficient 3 is present in before sulphuric acid and water molecule.
Fe + AgNO₃ → Fe(NO₃)₂ + AgBalanced form of above reation will be written as Fe+ 2AgNO₃ → Fe(NO₃)₂ + 2Ag.
C₂H₄O₂ + O₂ → CO₂ + H₂OBalnced form of above chemical equation will be represented as C₂H₄O₂ + 2O₂ → 2CO₂ + 2H₂O, and coefficient 3 is not used any where.
The quation which have the coefficient 3 is 3H₂SO₄ + 2B(OH)₃ → B₂(SO₄)₃ + 3H₂O.
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Answer: It's 3. H2SO4 + B(OH)3 B2(SO4)3 + H2O
Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrogen gas are produced when 27.5g of sodium are added to water?
Answers
Answer:
.598 moles of H2
Explanation:
Find the balanced equation of the reaction
2Na + 2 H2 0 ====> 2 Na OH + H2
27.5 gm of Na is 27.5/ 22.989 =1.196 moles
from the equation, each mole of Na produces 1/2 mole of H2
1.196 moles * 1/2 = .598 moles of H2
The reaction given by
2Na+2H_2O—»2NaOH+H_2Moles of sodium:-
Given mass/Molar mass27.5/231.196molSo
2mol Na Produces 1 mol H_21 mol Na Produces 0.5mol H_21.196 mol Na Produces=0.5(1.196)=0.598mol H_2A person’s
mass
will be the same on Jupiter and Earth. A person’s
height
will be greater on Jupiter than on Earth.
Answers
Help please!
An Arrhenius acid increases the concentration of hydrogen ions when dissolved in solution.
True
False
Answers
Answer:
The answer is true
Explanation:
An Arrhenius acid is a substance that increases the concentration of hydrogen ions in solution when it is dissolved in water.
Answer:
false
Explanation:
Giardiasis is an intestinal parasite that can transmitted through person-to-person contact and infested swimming pools. This parasite is best classified as
nosocomial.
inherited.
contagious.
iatrogenic.
asymptomatic.
Answers
Answer:
I think it would be Contagious.
Explanation:
You get it from another person or from food and thats contagious.
help this is for my cousin lol
Answers
Answer:
For camouflage, to blend in with their surroundings.
Explanation:
The solid, golden brown fur coat of the lion acts as camouflage and helps it hide to catch its prey, in low-lying grasses of the African savanna.
Water can act as both an acid and a base in an ionization reaction to form H') and OH ions.
What is this phenomenon called?
O self-ionization
O neutralization
O acid dissociation
O base dissociation
Answers
Answer:
neutralization
Explanation:
Water is a very interesting compound.It has tendency to both donate and accept a pair of electronsWhen it accepts it forms H_3O+ to be lewis acid.When it donates it forms OH- to be Lewis baseQuestion 3 someone help me please
Answers
Answer:
False ....
first of all gas is not the desirable product of combustion
To determine the limiting reactant in a chemical reaction, one must know the:.
Answers
Answer:
The available amounts of each reactant
Explanation:
The limiting reactant is the reactant that will limit the equation.
For example, I have 2N2 and H2O. In this situation, H2O would be the limiting reactant since there is only one atom, while N2 has two atoms.
Think of it like you're making peanut butter and jelly. You have 50 cans of peanut butter and only 10 jelly. Which means you can only make sandwiches using 10 jars of jelly and 10 jars of peanut butter.
Balance the equation below:
NO2(g) + H2O(l) + O2(g) → 4HNO3(aq)
HELP PLEASE!
Answers
Explanation:
This is an oxidation-reduction (redox) reaction:
4 NIV - 4 e- → 4 NV (oxidation)
2 O0 + 4 e- → 2 O-II (reduction)
NO2 is a reducing agent, O2 is an oxidizing agent.
I need help with this ( look at the picture I put)
Answers
Answer:
12 H, 18 O, 6 C
Explanation:
[tex]6H_{2} O + 6CO_{2} -- > C_{6}H_{12} + 6O_{2}\\[/tex]
___________________
first, we'll fo the h on the first equation: [tex]6H_{2}[/tex]
multiply the 6 and 2 to get twelve.
in the second equation, we see that there is [tex]H_{12}[/tex]
so, in both there are 12 H.
__________________
Now we'll do O.
in the first equation we have [tex]6O + 6O_{2}[/tex]
so we have 6 + (6*2) or 6 + 12, which gives us 18
in the second equation we have [tex]O_{6} + 6O_{2}[/tex]
it's basically the same thing, just written differently, so we have 18.
__________________
Finally, C.
In the first equation, we have [tex]6C[/tex]
in the second [tex]C_{6}[/tex], again, same thing expressed differently.
both have 6 C.
How much heat energy is required to raise the temperature of 15g of silver from 25°C to 55°C, assuming the specific heat of silver
is 0. 24 J/gºC?
30
108
15 J
115 J
Answers
Answer:
108 j
Explanation:
.24 j/g-C * 15 g * (55-25) =
how to get the atomic mass of hydrogen
Answers
Answer:
the atomic mass is 1.00784 u
Explanation:
to calculate the atomic mass you add up the mass of protons and neutrons.
Suppose all the NO2 molecules were synthesized into N2O4. Given the equation 2NO2 ⇄ N2O4, how many moles of N2O4 would be produced? 2. 34 moles of N2O4
Answers
The moles of N₂O₄ would be produced by given moles of NO₂ is 1 mole.
What is stoichiometry?Stoichiometry of any reaction gives idea about the amount of species present before and after the completion of reaction.
Given chemical reaction is:
2NO₂ ⇄ N₂O₄
From the stoichiometry of the reaction it is clear that, 2 moles of nitrogen dioxide will produces 1 mole of N₂O₄.
Hence the produced moles of N₂O₄ is 1 mole.
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