Answer:
Balanced equation: Zn (NO 3) 2 + 2 NH 4 OH = 2 NH 4 NO 3 + Zn (OH) 2 Reaction type: double replacement
Explanation:
As a chemical energy is converted into heat energy during a reaction the total energy of the system
When a chemical energy is converted to hear during a chemical reaction, the total energy of the system remain constant.
Law of conservation of Energy?Law of conservation of energy state that the today energy interacting with bodies in a isolated system remain constant
the Law of Conservation state that the total energy in a system remain unchanged, and that oftentimes a chemical reaction will absorb or release energy in the form of heat, light, or both.
Therefore, The total energy of the system remain constant.
Learn more about law of conservation of energy here.
https://brainly.com/question/166559
As you move from left to right in the third period of the periodic table…
A. Each group loses an outer electron
B. Each group gains an outer electron
C. Each group gains a neutron
D. The number of outer electrons remains constant across the period
Answer:
B
Explanation:
2.8.1 Na
2.8.2 Mg
and so on and so forth
please help!!!
Sulfur (S) has 16 protons and 16 neutrons. How many electron shells does an element of sulfur have?
3
4
2
1
Answer:
Sulfur (S) has 3 shells.
Explanation:
The first shell can have up to 2 electrons. The second and third shells have up to 8 electrons as well. This makes the maximum of each shell to be 2, 10, and 18. Sulfur has 16 electrons so it has more than the second shell but less than the third shell. So, it will have 3 shells with a valence of 2 since it is missing 2 electrons to create a full shell.
Which type of resources cannot be replenished by natural processes in a reasonably short period of time?
A: nuclear waste
B: natural resources
C: nonrenewable resources
D: renewable resources
What are the characteristics of nonvascular plants? (select all that apply) A . They don’t rely on roots to receive water.
B .They have xylem vessels and phloem vessels
C . They are able to push water and nutrients to each part of the plant.
D . They are found in moist environments.
Answer:
D . They are found in moist environments.
Explanation:
Nonvascular plants do not have a xylem or phloem, roots, stems, or leaves. Because these plants lack water-conducting tissues, they fail to achieve the structural complexity and size of most vascular plants and have evolved in habitats which allow their survival and reproduction.
The plant body that is most obvious in non-vascular plants are the the gametophyte generation. The gametophte gemeration is haploid.
The non-vascular plants grow in moist environments. It is due to lack of vascular tissue that requires to maintain close contact with water to prevent desiccation. Nonvascular plants are plants that do not have any special internal pipelines or channels to carry water and nutrients. Instead, nonvascular plants absorb water and minerals directly through their leaflike scales. Nonvascular plants are usually found growing close to the ground in damp, moist places. Non-vascular plants thrive in damp conditions since they don't need to rely on roots to acquire enough water.
Fe(NO3)3
Percent composition
Answer:
Fe: 23.1%
N: 17.4%
O: 59.5%
Explanation:
You take the grams that each weigh on the periodic table and add it all up. Afterward you create fractions of each over the whole. (Example: Fe/Fe+N+O) then you divide and turn that decimal into a percentage.
1) A solution is prepared with 0.55 M HNO2 and 0.75 M KNO2. Fill in the ICE Table with the appropriate values
2) The Ka for this solution of HNO2 is 6.8x10^-4. Based on the ICE table, set up the expression for Ka.
3) Based on your ICE table, determine the pH of the buffer solution
Based on the calculations through the ICE table, the pH of the buffer solution is equal to 3.30.
Given the following data:
Concentration of [tex]HNO_2[/tex] = 0.55 M.Concentration of [tex]KNO_2[/tex] = 0.75 M.Rate constant = [tex]6.8 \times 10^{-4}[/tex]How to determine the pH of the buffer solution.First of all, we would write the properly balanced chemical equation for this chemical reaction:
[tex]HNO_2(aq)\rightleftharpoons H^{2+} (aq)+ KNO_2^{-}(aq)[/tex]
Initial cond. 0.55M 0 0.75M
[tex]\Delta C[/tex] -x x x
At equib. 0.55M - x 0 + x 0.75M + x
From the ICE table, the Ka for this chemical reaction is given by:
[tex]K_{a}=\frac{[H^+][NO_2^+]}{HNO_2} \\\\H^+ = K_{a}\frac{[HNO_2]}{[NO_2^+]} \\\\H^+ = 6.8 \times 10^{-4} \times \frac{0.55}{0.75} \\\\H^+ = 6.8 \times 10^{-4} \times 0.733\\\\H^+ = 4.98 \times 10^{-4} \;M[/tex]
Now, we can calculate the pH of the buffer solution:
[tex]pH=-log[H^+]\\\\pH=-log[4.98 \times 10^{-4}]\\\\pH=-(-3.30)[/tex]
pH = 3.30.
Alternatively, you can calculate the pH of this buffer solution by applying Henderson-Hasselbalch equation:
[tex]pH =pka+ log_{10} \frac{A^-}{HA}[/tex]
Where:
HA is acetic acid.[tex]A^-[/tex] is acetate ion.Read more on concentration here: https://brainly.com/question/3006391
Referring to your benzene model, explain why there is no directionality for a substituent group bonded directly to a benzene ring.
The benzene molecule is flat and planar. As a result of this planarity, the substituent is also in the plane of molecule and do not show any directionality.
What is the benzene moleculeThe benzene molecule is a flat and planar molecule owing to the fact that all the bond lengths and bond angles in the molecules are the same. This results from resonance in the molecule.
Hence, owing to the planarity of the molecule, the substituent is also in the plane of molecule and do not show any directionality.
Learn more about benzene: https://brainly.com/question/7284916
In Fig C, which pair of electrons is the lone pair?
H:P:H
Fig C
H
O Top
O Left
Bottom
O Right
Answer:
bottom right top left fig
Use the bond energy to calculate an approximate value of ΔH for the following reaction. Which is the more stable form of FNO2?
The Lewis structures in which there are no formal charges is the most stable. Hence, structure (b) is the more stable form of FNO2.
Lewis structureThe question is incomplete but I will try to answer you as much as I can. Now the equation is missing hence we can't numerically caculate the enthalpy chnage of the reaction from bond energies. However, we can do this using the formula; Σbond energy of reactants - bond energy of products.
Concerning the Lewis structures of FNO2, the most stable structure is structure (b) as shown in the image attached where the atoms have no formal charges.
Learn more about Lewis structure:https://brainly.com/question/4144781
Which statement is true about precipitation in biomes around the world.
Question 6 options:
The taiga has more precipitation than the deciduous forest biome.
Deciduous forest biome is second in precipitation to the tropical rainforests.
Coniferous forest biome has more precipitation to the Deciduous forest biome.
The desert biome has more precipitation to the Deciduous forest biome.
Answer:
i want to say it's
Explanation:
(B) but i don't know but did you ever figure out the anwser?
Answer:
Coniferous forest biome has more precipitation to the Deciduous forest biome.
Explanation:
Explain how oxygen and carbon dioxide move with breathing.
Answer/Explanation:
With oxygen, it is what you breathe in so obviously, it is going to move around into your body. But with carbon dioxide, it is what you breathe out. When you breathe in, your body takes in the oxygen and the releases the carbon dioxide. Carbon dioxide is what plants actually consume, while they release oxygen.
I hope this helps!
-No one
Which statement describes a seismic wave during an earthquake?
A.
The wave changes directions as it is pulled by gravity.
B.
The wave changes speed as it moves through different materials.
C.
The wave loses energy to the oceans when it comes in contact with the water.
D.
The wave reflects off the surrounding rocks as it moves through the outer core.
Based on their nature of waves, seismic waves changes speed as it moves through different materials.
What are seismic waves?Seismic waves are the waves that are produced and travel through the earth crust during an earthquake.
Seismic waves are often described as elastic waves which is the energy caused by a sudden breaking of rock within the earth's crust.
Seismic waves can travel at different speeds through different types of rock, bouncing back or changing direction.
Therefore, the correct statement which describes a seismic wave during an earthquake is that the wave changes speed as it moves through different materials.
Learn more about seismic waves at: https://brainly.com/question/8553835
Why is the electron configuration for copper 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 1 instead
of 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 9 4 s 2 ?
A The 4 s orbital has higher energy than the 3 d orbital.
B Electrons occupy orbitals of the highest energy levels first.
C A filled sublevel is more stable than a half-filled sublevel.
I would really appreciate someone could answer this question for mee! I will mark brainliest aswell. :)
Which statement is true about the total mass of the reactants during a chemical change?
A)It is destroyed during chemical reaction
B)It is less than the total mass of the products.
C)It is equal to the total mass of the products.
D)It is greater than the total mass of the products.
Answer:
c
Explanation:
mass is like matter it cant be created or destroyed so mass stays the same.
Answer:
C) It is equal to the total mass of the products.
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.
- profparis
how many moles of glucose do I have if I have 26 grams of glucose
Answer:
0.1443194637888042 moles
Explanation:
Hope This Helps
Have A Great Day
~Zero~
The text above says that many acids taste sour, but also states that oranges and tomatoes contain acid. Suggest at least one reason why these fruits don't taste sour
Fruits don't taste sour because of less hydrogen ions and less acid.
Why these fruits taste sour?Scientists discovered that pulp from sour fruit contains more hydrogen ions, which leads sour taste while on the other hand, the sweeter fruit-like pineapples has pulp that contains fewer hydrogen ions, leading to less acidic and sweeter in taste.
So we can conclude that fruits don't taste sour because of less hydrogen ions and less acid.
Learn more about sour here: https://brainly.com/question/412863
Kinetic friction is the frictional force needed to start an object at rest into
motion.
O A. True
O B. False
Answer:false you are welcome
Explanation:
Answer: False I hope this helpful please mark me brainlist
Explanation:
Kinetic friction is the friction acting upon a moving object. It would be the frictional force against you if you pulled a box across a table.Static friction is the frictional force needed to overcome to get an object at rest into motion.
Which kind of wave is formed when a transverse wave and a longitudinal wave combine?
A a surface wave
B an electromagnetic wave
C a sound wave
D a radio wave
The kind of wave that is formed when a transverse wave and a longitudinal wave combine is surface wave.
What is surface wave?A surface wave is a mechanical type of wave that propagates along the boundary between two different media.
How surface waves formWhen a mechanical wave travels at the interface between two media, a transverse wave and a longitudinal wave can combine to form a surface wave.
An example can be seen in ocean waves.
Thus, the kind of wave that is formed when a transverse wave and a longitudinal wave combine is surface wave.
Learn more about surface waves here: https://brainly.com/question/11750134
1. Can you please put the following chromatography solvents in order of polarity as a chromatography solvent: acetone, n-propanol,
water, hexane, diethyl ether, methanol and explain
2. chromatography with a mixture of n-propanol and water. Would it make sense to add hexane to this mixture to try and make it work better? why?
3. The basic food colors you can buy are red, blue, green, and yellow. Think about what you know about colors
and predict which of these might be a single colored compound and which ones might contain more than one.
Write down your prediction. If you have the colors listed and want a purple color, what would you do?
The order of increasing polarity of the solvents is; hexane< diethyl ether < acetone < n-propanol < methanol < water
What is chromatography?Chromatography literarily means "color writing". It provides a means of separating the components of a mixture based on its components.
The solvent in chromatography is the mobile phase while the adsorbent is the stationary phase. The order of increasing polarity of the solvents is; hexane< diethyl ether < acetone < n-propanol < methanol < water
If we have a mixture of n-propanol and water, it would be good to add hexane to the mixture for the sake of the elution of non-polar solutes.
The secondary color green may be composed of more than one color while red, blue and yellow are single colors.
Learn more about chromatography: https://brainly.com/question/26491567
New materials can be constructed molecule-by-molecule and atom-by-atom using ______________ in their design.
The boulder shown below has a weight of 10,000 N & is 500 m above the ground. How much gravitational potential energy does the boulder have?
Answer:
5,000,000 joules
Explanation:
Formula for Potential Energy =mgh
mass*gravity*height
mass=weight ÷ by gravity
10000÷10= 1000
1000×10×500m=5,000,000 joules
If you start with 10 carbon and 3 Hydrogen, what will you end with?
Answer:
The simplest Organic compounds are made up of only Carbon and Hydrogen atoms only. Compounds of Carbon and Hydrogen only are called Hydrocarbons.
Explanation:
Are two atoms of the same element identical?
Answer:
No. They typically are not identical.
Explanation:
Atom's electrons can be in different states
Answer:
NO
Explanation:
Atoms are like dna and cells they all have a different job even if they are the same element
Amory turns the light on in her house. Looking at the lights, she begins to wonder how the charges are moving through the bulb. Which statement best describes how the charges move through the bulb ?
The statement 'when charges pass through the bulb, light is produced' best describes how the charges move through the bulb.
What is an electrical charge?An electrical charge is a type of positive or negative charge of the particles that move in a conductor.
At the atomic level, protons are positively charged particles, electrons are negative, and neutrons do not have a charge.
The electrical charges depend on the charge's initial time, the final time, and the net outward current.
Learn more about electrical charges here:
https://brainly.com/question/2373424
please help, I'm giving brainliest. Explain the term'wear acid'.
Identifying My Interests
List five activities that you enjoy
Answer:
BIKE riding, Watching yt, Hanging with friends, Food,Dogs
determine the degree of ionization at pH 2.0
Answer:
answer in the picture above
I need help with Discussion of chemical reaction of experiment Asp please!!
Answer:
may I help?............
An ion has 14 protons and a charge of “+2”. How many electrons does it have?
Answer : 12
It has a +2
Take it out from 14