Answer:
1. Al³⁺ + 3e⁻ → Al
Explanation:
In a reduction, the oxidation number of a species is converted to a lower value.
In the following half-reaction:
Al³⁺ + 3e⁻ → AlThe number of atoms is the same on both sides of the equation (one Al atom). The electrical charge is also the same, as there is a total charge of 0 on both sides.
Which is the best way to describe the biodiversity of an area?
O A grassland has organisms that live on hundreds of acres of land.
O A desert has 10 species of animals that can survive dry conditions.
O A rainforest has fertile soil that supports many kinds of plants.
O A pond has 12 species of organisms, including 300 animals and 40 plants.
Answer:
i just put a
Explanation:
Answer:
the answer is d, i got it on edge
4.What kinds of cells are specialized cells that recognize a hormone's structure?
stem cells
red blood cells
white blood cells
target cells
What happens to temperature if pressure goes up and volume remains the same?
What happens to temperature if pressure goes down and volume remains the same?
What happens to pressure if volume remains the same but temperature goes up?
What happens to pressure if volume remains the same but temperature goes down?
What happens to pressure if volume goes up and temperature remains the same?
What happens to pressure if volume goes down and temperature remains the same?
What happens to volume if pressure is held constant but temperature goes up?
What happens to volume if pressure is held constant but temperature goes down?
Answer: 1) The temperature is proportional to volume
2) The temperature is proportional to volume
3) The pressure increases
4) The pressure decreases
5) Less collisions
6) More collisions, which means more pressure
7) The volume does not change
8) The volume does not change.
Explanation:
the greenhouse effect
The greenhouse effect refers to global warming as a consequence of the accumulation of greenhouse gases.
What are greenhouse gases?Greenhouse gases are different types of gaseous elements that trap solar radiation on the Earth's surface.
The most important greenhouse gases include, among others, methane and carbon dioxide (CO2).
In conclusion, the greenhouse effect refers to global warming as a consequence of the accumulation of greenhouse gases.
Learn more about greenhouse gases here:
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The equivalence point for a strong acid – strong base titration will occur at:
pH < 7
pH = 7
pH > 7
pH = 14
I believe the ans is (2) pH = 7.
Explanation:
At the equivalence point, the salt of strong acid and strong base is completely hydrolyzed which gives a neutral solution with pH 7 as H+ ion concentration is equal to OH- ion concentration.
How many grams are there in 7.40 moles of AgNO3?
Answer:
1257.03 grams
Explanation:
mass=mole*molar mass
mass=7.4*169.87= 1257.03
Magnesium reacts with Lead II Nitrate in a Single Displacement Reaction.
Show formula
Answer:
Mg(s) + Pb(NO3)2 (aq) → Mg(NO3)2 (aq) + Pb(s)
Explanation:
helpppppp plzzzzzzzzz
Answer:
is this for rp
Explanation:
Which compound would evaporate the most quickly from identical containers at identical temperatures?
A) C7H16
B) C7H15OH
C) C7H15NH2
D) C5H12
E) C6H13COOH
Answer:
D) C5H12
Explanation:
The rate of evaporation of a solution depends on the nature of intermolecular forces in the solution. The stronger the magnitude of intermolecular forces present the lower the rate of evaporation.
If we consider the compounds; C7H15OH, C7H15NH2 and C6H13COOH, the presence of polar groups implies that dipole-dipole interactions are present in the molecule leading to stronger intermolecular interaction and a slower rate of evaporation.
On the other hand; C7H16 and C5H12 are alkanes. The intermolecular forces that exists between their molecules is the weak dispersion forces. However, the magnitude of dispersion forces increases as the molecular mass of the compound increases.
Hence, C5H12 has the fastest rate of evaporation since it has the lowest molecular mass.
1. What did you notice about the distance between the atoms as the number of bonds increased? (Compare bond of H2S and H2O)
2. What is the relationship between atomic size and bond length for H2O / H2S and CO2 / CS2?
Answer:
Inverse relationship between number of covalent bonds and bond length.
Explanation:
There is inverse relationship between number of covalent bonds and bond length which means that if one increases the decreases or the one decreases the increases. When the number of covalent bonds between two atoms increases, the bond length decreases because there are more number of electrons present between the two nuclei, the two nuclei can get closer to each other until both nuclei experience their repulsive force of attraction. In bond of H2S has lower electronegativity value as compared to H2O so the bond length decreases due to attraction of shared pair of electrons by both nuclei.
Explain how the connotations of the bolded words in each sentence impact the meaning being conveyed.
Answer:
Find the explanation below.
Explanation:
Sentence A: In sentence A, the bolded words create a positive undertone to the entire meaning of the text. Words such as unimaginable accomplishment, stunning, and fascinated produce a pleasing and heartening mood. They make it clearer to the reader that this action by the scientists elicited a favorable response from the viewers.
Sentence B: In sentence B, there is a negative undertone to the text. The use of descriptors such as shocking, recklessly, alarmed, tells the reader of the unfavorable response the action of the scientists produced in the viewers. A gloomy mood is thus created.
Can somebody help me with these 2 things. I honestly just need the acids and bases for both
Answer:
The Bronsted-Lowery acid is H2O
The Bronsted-Lowery base is CO3
The conjugate acid is HCO3
The conjugate base is OH
Explanation:
Molocules that lose a hydrogen in a reaction act as an acid, and those that recieve one act as a base.
_____ Ca(NO3)2 + _____ Fe → _____ Fe(NO3)3 + _____ Ca I need this done quick and fast Balancing chemical equations
Answer:
3, 2, 2,3
..........................
PLEASE ANSWER ASAP!!!!!!! 50 points if the answer is correct!
Vinegar is sold as a 5.00% (v/v) solution of acetic acid. How many mL of water are in a 455-mL bottle of vinegar? Round your answer to 3 significant figures. Please answer in mL
Please please only answer if you are sure the answer is correct. thank you so much
5
mL acetic acid
95
mL water
Explanation:
Since
5
%
of the vinegar, by volume, is acetic acid, and we have
100
mL of vinegar, we have
5
mL of vinegar.
Similarly, we have
100
%
−
5
%
=
95
%
being water, so we have
95
mL of water.
please answer quick please, im have a test
So I have an F in science, and everything is due today. Am I going to fail 9th grade because I didn't pass that class?
Answer:
i dk how ur school works, but you'll most likely have to take that science again to get the credits u need to graduate
Explanation:
A piece of iron at 75.0oC is dropped into 50.0 g of water at 20.0oC. The final temperature of the water is 28.3oC. The specific heat of iron is 0.450 j/goC. Determine the mass of the piece of iron.
Answer:
13Explanation:
be critical thinkers
What is the mass of 6.40 moles of copper(II)chloride (CuCl2)?
Answer:
860. g CuCl₂
General Formulas and Concepts:
Atomic Structure
Reading a Periodic TableCompoundsMolesStoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
[Given] 6.40 mol CuCl₂
[Solve] g CuCl₂
Step 2: Identify Conversions
[PT] Molar Mass of Cu: 63.55 g/mol
[PT] Molar Mass of Cl: 35.45 g/mol
Molar Mass of CuCl₂: 63.55 + 2(35.45) = 134.45 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 6.40 \ mol \ CuCl_2(\frac{134.45 \ g \ CuCl_2}{1 \ mol \ CuCl_2})[/tex][DA] Multiply [Cancel out units]: [tex]\displaystyle 860.48 \ g \ CuCl_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
860.48 g CuCl₂ ≈ 860. g CuCl₂
Unit 7 CER
Using your knowledge of chemistry and the information below determine if the unknown compound is covalent or ionic.
CaCl2
*Make sure to write your answer using complete sentences.
*Make sure your answer has a claim whether it is ionic or covalent.
*Cite at least 1 piece of evidence and your knowledge of chemistry to back up your claim.
*The reasoning or conclusion behind your claim.
What process helps to purify water in nature?
Answer:
Filtration,Sedimentation and distillation
Explanation:
These 3 are physical processes which are commonly used in nature while in chemical processes,Chlorination is done to eliminate bacteria and other germs present
Happy 2 have helped in some way
How many total atoms are in 1 mole of H2O?
Answer:
1.806 x 10^24 atoms total
Explanation:
Who can help me with 4 questions of ixl about changes in gravitational potential energy
can u pls show a picture of it?
the symbol of the eyes of symbol of shayambhunath stupa
Explanation:
The symbol of the eyes of syambhunath stupa refers to the eyes of gautam buddha also known as the eyes of wisdom. These eyes are prevalent throughout the country and have become a symbol of peace.
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What is the number whose 25% is 800?
Answer:
3200
Step-by-step explanation:
Let the number be x:
25 % of x = 800
⇒ 25/100 × x = 800
⇒ 1/4 × x = 800
⇒ x = 800 × 4
∴ x = 3200
what type of electromagnetic radiation includes the wavelength 10-7 m
Explanation:
Regions of the Electromagnetic Spectrum
Listed below are the approximate wavelength, frequency, and energy limits
of the various regions of the electromagnetic spectrum.
Wavelength (m) Frequency (Hz) Energy (J)
Radio > 1 x 10-1 < 3 x 109 < 2 x 10-24
Microwave 1 x 10-3 - 1 x 10-1 3 x 109 - 3 x 1011 2 x 10-24- 2 x 10-22
Infrared 7 x 10-7 - 1 x 10-3 3 x 1011 - 4 x 1014 2 x 10-22 - 3 x 10-19
Optical 4 x 10-7 - 7 x 10-7 4 x 1014 - 7.5 x 1014 3 x 10-19 - 5 x 10-19
UV 1 x 10-8 - 4 x 10-7 7.5 x 1014 - 3 x 1016 5 x 10-19 - 2 x 10-17
X-ray 1 x 10-11 - 1 x 10-8 3 x 1016 - 3 x 1019 2 x 10-17 - 2 x 10-14
Gamma-ray < 1 x 10-11 > 3 x 1019 > 2 x 10-14
An eighth-grade teacher has asked you to present information to her students about how watching television can affect adolescents' academics and behavior. What important information should you share with this audience? Write an essay that will serve as the basis for the speech you will deliver to the students. Include important details from the selection "Television and Adolescents" to support your discussion.
Answer:
Adverse effect.
Explanation:
Watching television can greatly affect academics and behavior of adolescents. Watching television affect the academic performance of adolescents. The possible negative health effects of television viewing on children and adolescents are violent or aggressive behavior by watching violent films, increase sexual activity, increase in weight, poor body image. Watching more television waste time as well as decreased school performance. The adolescents stay away from physical activities such as sports and outdoor games.
Answer:
Watching television can greatly affect academics and behavior of adolescents. Watching television affect the academic performance of adolescents. The possible negative health effects of television viewing on children and adolescents are violent or aggressive behavior by watching violent films, increase sexual activity, increase in weight, poor body image. Watching more television waste time as well as decreased school performance. The adolescents stay away from physical activities such as sports and outdoor games. While watching TV is not an "evil" thing, it can have some affects in the youth. It can affect behavior with friends, family and other people whom are around you. In addition it could even go as far as affecting academic success and failure. Watching television can interfere with time the adolescents could be using to study or spend time outdoors. It also could show images that would not be appropriate for an adolescent to view. Overall, while television is not evil, and can be an entertaining pasttime, it can affect adolescents negatively.
Explanation:
edge 2022
How many grams of chlorine would exert a pressure of 610 torr in a 3.26-liter container at standard temperature? 4.25gCL
Answer:
[tex]m=8.28gCl_2[/tex]
Explanation:
Hello there!
In this case, according to the given information, it possible for us to realize that this problem is solved via the ideal gas equation:
[tex]PV=nRT[/tex]
By which we solve for the moles of chlorine gas as shown below:
[tex]n=\frac{PV}{RT}[/tex]
Next, we plug in the given pressure (in atm), the volume and standard pressure (273.15K) to obtain:
[tex]n=\frac{610/760atm*3.26L}{0.08206\frac{atm*L}{mol*K}*273.15K}\\\\n=0.117molCl_2[/tex]
Then, since the molar mass of chlorine gas (Cl2) is 70.9 g/mol, the mass of this gas turns out to be:
[tex]m=0.117molCl_2*\frac{70.9gCl_2}{1molCl_2} \\\\m=8.28gCl_2[/tex]
Regards!
Let's say you are sanding a rough board to make shelves for you bedroom. What type of weathering would this be? How do you know?
Answer:
Physical or Mechanical weathering.
Explanation:
The sanding is a physical transformation of the rough board to make shelves for the bedroom and thus includes wear and tear of the wood in order to make the set. Hence the process includes grinding, polishing and smoothing the surface to make it usable.Mass is a measure of how much matter something has.
False
True
Answer:
true
Explanation:
Describe how electromagnetic waves are formed and
travel through space.
Answer:
Electromagnetic waves are created by a charged particle that generates an electric field. The electric field creates a magnetic field. As the charged particle moves, the electric field and magnetic field keep changing, which causes the wave to move
Answer:
Electromagnetic waves are formed by charged particles which create an electric field. The electric field generates a magnetic field. As the particle moves, the electric field changes, which causes the magnetic field to change.
Explanation:
Edge, 2022.