Answer:
A. The sum of the voltages of the half-reactions is positive.
Explanation:
correct on a p e x
Among the following redox conditions those will produce a spontaneous reaction is The sum of the voltages of the half-reactions is positive.
What are redox reactions?Redox reactions are the reactions in which reduction reaction and oxidation reaction happens simultaneously. The term ‘redox’ is a short form of reduction-oxidation. All the redox reactions can be broken down into two different processes: a reduction process and an oxidation process.
The loss of electrons and the corresponding increase in the oxidation state of a given reactant is called oxidation. The gain of electrons and the corresponding decrease in the oxidation state of a reactant is called reduction.
For example-
H₂ + F₂ → 2HF
Hydrogen is added to Fluorine gas so Fluorine has been reduced but Hydrogen has been oxidised.
Therefore, Among the following redox conditions those will produce a spontaneous reaction is The sum of the voltages of the half-reactions is positive.
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which is more reactive between magnesium and sulphur?
Answer:
Sulfur (in British English: sulphur) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur
2. Imagine there is a piece of lead (Pb) that has 1,000,000 atoms in it and a piece of cobalt (Co) with 1,000,000
atoms in it. Interpret the properties of the two atoms and make a scientifically supported judgement on
which piece has a greater mass. (max 7/8)
Answer:
dhuqhruhqhuehauhrergre
Explanation:
Which diagram above has 4 valence electrons?
Answer:
answer A has four valence electrons
Explanation:
The outer shell has 4 electrons, which are considered the valence electrons
Which change to the setup is least likely to cause an increase production of bubbles?
Adding a bright light source.
Adding a source of carbon dioxide to the water.
Adding a different fluid to the water.
Adding a second plant to the test tube.
Answer:
D, adding a second plant to the test tube
The nervous system involves actions that control
Answer:
The peripheral nervous system can be further divided into the autonomic system, which regulates involuntary actions, and the somatic system, which controls voluntary actions.
Explanation:
mark as brainly plz and thanks
Answer: voluntary actions.
Explanation:The peripheral nervous system can be further divided into the autonomic system, which regulates involuntary actions, and the somatic system, which controls voluntary actions.
23. Soluble salts can be prepared using
the following methods except by
A. action of dilute acids on
metals.
B. action of dilute acid on an
insoluble base.
C. direct combination of
constituent elements.
D. neutralization reactions.
E. precipitation from solutions,
help ple*zzzz*zzz*
Answer:
I think crystallization is a write answer for this question
Explanation:
but according to this (E is the write answer)
What type of boundary exists along the coast of California?
Answer:
I exist ;-;
Explanation:
AlBr3 can be used as a catalyst in the Friedel-Crafts alkylation reaction. The correct name for the compound represented by the formula AlBr3 is
The question is incomplete, the complete question is;
AlBr3 can be used as a catalyst in the Friedel-Crafts alkylation reaction. The correct name for the compound represented by the formula AlBr3 is —
aluminum bromide
monoaluminum tribromide
aluminide bromine
aluminum tribromide
Answer:
aluminum bromide
Explanation:
Having known that AlBr3 is an ionic compound and aluminium is the central atom here, we now have to ask ourselves if Aluminium exists in other stable oxidation states.
We must take cognizance of the fact that the oxidation number of the central atom in a compound becomes part of the name of that compound when other stable oxidation states for atoms of the same elements exists.
Since the +3 state is the only stable oxidation state for aluminium, the name of the compound is simply aluminium bromide.
If the ball is at rest on the soccer field and the four forces shown are applied at the same time, the ball will
А.
move to the left.
B. stay in the same position.
c. accelerate in the direction of the smallest force.
D. resist any change in movement.
Since the rightward force is greater than the leftward force by a magnitude of 10 Newton, the ball will: A. move to the left.
Given the following data:
Upward force = 50 Newton.Downward force = 50 Newton.Rightward force = 30 Newton.Leftward force = 40 Newton.A net force can be defined as the vector sum of all the forces acting on an object.
Hence, net force is the sum of all forces acting simultaneously on an object.
To determine the direction in which the ball would move if the four forces shown are applied at the same time:
For the downward and upward force:
[tex]Net\;force = 50-50\\\\Net\;force = 0\;Newton[/tex]
For the rightward and leftward force:
[tex]Net\;force = 40-30\\\\Net\;force = 10\;Newton[/tex]
Since the rightward force is greater than the leftward force by a magnitude of 10 Newton, the ball will move to the left.
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20. Sudan III is used to test for
A. cellulose.
B. fats and oils.
C. glucose.
D. protein.
E. starch.
Answer:
Lipid tests
Sudan III is a red fat-soluble dye that is utilized in the identification of the presence of lipids, triglycerides and lipoproteins. The Reaction: Sudan III reacts with the lipids or triglycerides to stain red in colour.
Answer:
I think soo fats and oils
PLEASE HELP! 30 POINTS + BRAINLIEST!
If the product of the reaction is analyzed and found to contain 0.130 g of nitrogen and 0.370 g of oxygen, which compound was made?
Answer:
bro
Explanation:
If the product of the reaction is analyzed and found to contain 0.130 g of nitrogen and 0.370 g of oxygen are N2O5
(?)Fe+(?)H20 - - -> (?)Fe3O4+(?)H2
Answer:
what is this question??
PLZ FASTLEY ANSWER The images show two metamorphic rock samples.
Left: light colored rock with coarse texture. Right: red and white rock with rounded grains and coarse texture.
Which statement accurately describes these rocks?
Both rocks are non-foliated.
Neither rock has randomly arranged grains.
Both rocks formed at Earth’s surface.
Neither rock formed through extreme heat or pressure.
Answer:
a
Explanation:
From the given images, it is clear that both rocks are non-foliated rocks because they don't have distinct repetitive layers. Hence option a is correct.
What are metamorphic rocks?Metamorphic rocks are formed through intense pressure and heating from the sedimentary or igneous rocks. Sometime the change n heat or pressure make the metamorphic rocks gets foliated.
Foliation occurs when pressure forces flat or elongate minerals within a rock to align. These rocks form a platy or sheet-like structure that reflects the pressure direction. There is no platy or sheet-like structure in non-foliated metamorphic rocks.
Non-foliated rocks can be created in a variety of ways. Some rocks, like limestone, are composed of minerals that are not flat or elongate. Therefore, the given rocks are non-foliated.
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If you had a 100 mL of a solution of 0.01 M NaF, how many moles would that solution contain?
Answer:
0.001 mole of NaF.
Explanation:
From the question given above, the following data were obtained:
Volume of solution = 100 mL
Molarity = 0.01 M
Mole of NaF =?
Next, we shall convert 100 mL to litre (L). This can be obtained as follow:
1000 mL = 1 L
Therefore,
100 mL = 100 mL × 1 L / 1000 ml
100 mL = 0.1 L
Thus, 100 mL is equivalent to 0.1 L.
Finally, we shall determine the number of mole of NaF present in the solution. This can be obtained as follow:
Volume of solution = 0.1 L
Molarity = 0.01 M
Mole of NaF =?
Molarity =mole /Volume
0.01 = mole of NaF / 0.1
Cross multiply
Mole of NaF = 0.01 × 0.1
Mole of NaF = 0.001 mole.
Thus, 0.001 mole of NaF is present in 100 mL of the solution.
These elements most likely belong to which group?
A layer of sandstone is found on top of a layer of shale
Answer: Yes it is
Explanation:
A hydrocarbon with vapour density
22 contains 36 g of carbon. What is
its molecular formula?
(C = 12, H= 1).
A. C3H4
B. C3H6
C.
C3H8
D. C4H8
E. C4H10
Answer:
the answer is C4H10 I hope I helped
What is the name for the compound formed between nitrogen and magnesium. (show your work)
Answer:
the compound formed between nitrogen and magnesium is Magnesium Nitride
what is the formula for this bond?
How does the fuel become more radioactive?
Answer:
I think it's B
Explanation:
I took the exam
A decrease in temperature decreases
. The reaction rate will
Answer:
The reaction rate decreases with a decrease in temperature. ... Molecules joined by stronger bonds will have lower reaction rates than will molecules joined by weaker bonds, due to the increased amount of energy required to break the stronger bonds.
What happens in this circuit if one of the light bulbs burns out?
1. The other light bulb will stay on but get dimmer
2. The battery will lose its charge and stop working
3. Both light bulbs will stop glowing
4. The other light bulb will stay on and glow brightly
Which of the following correctly compares glass A and glass B?
A black line splitting the image into two parts. On the left hand side is glass A that is almost full. On the right side is glass B that is half full.
Question 13 options:
Glass A has the same mass as glass B.
Glass A has a greater mass than glass B.
Glass A has the same amount of liquid as glass B.
The liquid in both glasses takes up the same space.
Answer:
Glass A has a greater mass than glass B
Answer:
Glass A has a greater mass than Glass B
hope this helped :>
Explain why a) Kl (potassium iodide) dissolves in water, but b) it will not dissolve in
hexane.
Answer:
Explanation: Brief description of demonstration
Three clear liquids form three distinct layers in a cylinder. Iodine crystals sprinkled on the top layer sink and form pink solutions with the top and bottom layers but do not dissolve in the middle. When the liquids are mixed, two layers form: a pink layer on the bottom, and a colorless layer on top. When white potassium iodide crystals are added and the liquids are mixed again, the colorless layer turns yellow.
Concepts illustrated:
• Phases and phase boundaries (surfaces)
• Density
• Polar/non-polar (hydrophilic/hydrophobic) interactions
• Solubility, miscibility
• Chemical reaction
• Extraction
• [Solution and emulsion]
Materials
• Clear glass reaction cylinder or gas-washing bottle, at least 200 mm tall, with ground glass stopper (A cylindrical container is preferable to a separatory funnel for this experiment. The stopper must be non- reactive, and, to prevent a potentially dangerous pressure build-up, the stopper must be easily released. For a very small class, a large test tube with a suitable stopper is adequate. )
• Equal volumes of chloroform, water, and hexane (The volume of each liquid should be a little more than one-fourth the volume of the cylinder.)
• Iodine crystals and small spatula
• Potassium iodide crystals and medium spatula
Preparation
Work in a hood. Pour the chloroform into the reaction cylinder. Add the water and allow the liquids to separate completely. (If necessary, speed the process by holding the cylinder vertical and gently swirling the solution with a circular motion.) Tip the cylinder and pour the hexane slowly down the side to prevent mixing. Close the cylinder and set it aside, away from sources of heat, until time for the demonstration.
Answer:It forms single phase mixtures (solutions) with other polar and ionic substances. ... Since water is less dense than this non-polar mixture, the bubbles rise to the top. Potassium iodide, an ionic compound, dissolves easily in water but does not dissolve in chloroform and hexane.
Explanation:
___ ___ ___ ___ ___ P ___ ___ ___ ___ ___ ___ ___ mediums allow light to pass through
Answer:
I thought the answer was " T R A N S P A R E N T " but I don't know what the extra two letters are! I'm sorry, that's all I've got..
Specifically critique your personal impact on the changing climate.
Answer:
We can no longer ignore the fact that the world's climate is becoming more unpredictable and more extreme. As water levels rise, the risk of flooding looms large. At the same time, periods of drought are becoming longer and more frequent. Yet, our most precious resource – our planet's biosphere – is not only under threat. It is also the source of many of our solutions. Green Climate Solutions is the Wageningen Environmental Research programme that applies our understanding of nature and natural processes to address the challenges of climate change.
What is not a correct description of a chemical element?
a. It is made of one type of atom.
b. It is the simplest substance of all matters.
c. Its atoms can be chemically separated.
d. Its atoms can be physically separated.
Answer:
b
Explanation:
because it is the simplest substance of all matters
Which type of bond will likely form between calcium and iodine?
ionic bond
polar covalent
non polar covalent
metallic
Answer:
ionic bond
Explanation:
cation calcium looses 2 electrons to bond with two iodine atoms to form CaI2 (Calcium Iodide)
Write the formula iron 11 bromide
Answer:
FeBr2
Explanation:
this isn't really an explanation but it's helpful so here, iron(II) bromide is an inorganic compound with the chemical formula FeBr₂. The anhydrous compound is a yellow or brownish-colored paramagnetic solid. Several hydrates of FeBr₂ are also known, all being pale colored solids.
help me i put max points
Answer:
D. Catastrophism
Explanation:
Answer:
Catastrophism is the answer :p lol
Explanation: