Answer:
electrolytes
Explanation:
If an electrical current can run though a solution, it is said to contain ions and the solution in which ions are present is called as electrolytes.
What are ions?
An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.
Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.
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Help me please!
What is the solubility of KNO3 in 100g of water at 60°C?
A.
28 grams/100g of H2O
B.
45 grams/100g of H2O
C.
108 grams/100g of H2O
D.
38 grams/100g of H2O
Answer:
C. 108 grams/100g of H2ORequired number is the vertical coordinate of the intersection point of a line at 60°C with the graph of the KNO₃.
Calculate the number of moles in 8200 grams of iron
Can someone help me with this?
Answer:
150 moles (2 sig. figs.)
Explanation:
to convert from ...
grams to moles => divide by formula weight
moles to grams => multiply by formula weight
this problem:
Given mass of Iron (Fe) = 8200g
formula wt of Fe = 56g/mole
moles = mass/formula wt = 8200g / 56g/mol = 146.42857 moles (calculator) = 150 moles (2 sig. figs.)
The number of moles in 8200 grams of iron is 57.69 moles of Fe.
What is Mole concept ?Mole is defined as the amount of the substance containing the same number of discrete entities (atoms, molecules, ions, etc) as there are atoms in a sample of pure 12C weighing exactly 12g.
The number of particles present in one mole of any substance is Avogadro Number and is equals to 6.023 x 10²³ particles.
Given ;
Weight : 8200 grams of ironTo find ;
Mole (n) : ?Formula used :
Mole (n) = given weight / atomic weight= 8200 / 56 (atomic weight of Fe = 56 gm)
= 157.69 moles of Fe.
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which metal is the most easily oxidized?
A. highly active metal
B. moderately active metal
C.slightly active metal
D.an inactive metal
Answer:
B. Moderately active metal
Explanation:
What do you think
about the Civil Rights
Movement?
Multiple Choice
1. Think About the definition of remote sensing. Which of the following could be considered sensors?
2. When satellite images are analyzed a unit called the pixel is a key to calculating what?
3. One Pixel represents.
a temperature
a wind speed of 10 kilometers per hour
a land area of 30 by 30 meters
various colors depending on their size
Answer:
Remote sensing is the process of detecting and monitoring the physical characteristics of an area by measuring its reflected and emitted radiation at a distance (typically from satellite or aircraft). ... Cameras on satellites can be used to make images of temperature changes in the oceans.
2.The answer is Land Area. If you know the distance and scale at which the image was captured, than one pixel of the image is equal to an X amount of area. The land area is represented as one pixel in an image called Resolution.
3.A pixel is the smallest picture element addressable on a picture, it is a specific location, and at that location associated with that location, is color, intensity
a.mph (miles per hour), mph. knots, knots. m/s (meters per second), m/s. ft/s (feet per second), ft/s. km/h (kilometers per hour), km/h ...
Explanation:
7 kph 4.35 mph
8 kph 4.97 mph
9 kph 5.59 mph
10 kph
The apparatus or tools that could be considered as sensors are telecopes, probes and landsat satellites.
What is remote sensing?Remote sensing can be defined as a process that is used for the acquisition of information about a phenomenon or physical object on a planet without coming in close contact with it, especially through the use of a telecope, probe or landsat satellite.
When satellite images are analyzed by astronomers or scientists, a unit called the pixel is a key to calculating land area. Also, one pixel is a unit that represents a land area of 30 by 30 meters.
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A ________________ uses chemical formulas to model what happens in a chemical reaction.
Pick 1 of the following
molecule compound
chemical equation
chemical reaction
new chemical
Answer:
Explanation:
Chemical equation
What can be used to measure the ph of a substance
HELP !
The provided balanced equation applies to the reaction that takes place between lithium hydroxide and sulfuric acid. 2LiOH + H2SO4 -> Li2SO4 + 2H2O .
If the reaction begins with 26.7 grams of lithium hydroxide (LIOH) and 164.08 grams of suite acid (H2SO4.), how many grams of lithium sulfate (Li2SO4,) is produced? Assume 100% yield . Round your answer to the nearest tenth of a gram .
Answer:
60g or 61.28g
Explanation:
Trust me on this I had the same problem as you
draw Fischer projection for L-ketononose
Answer: acttachec pic
The last carbon have the H on there, forgot to put it in :)
The Fischer projection of L-ketononose is:
H
|
CH₂OH-C=O-H
|
C
|
CH₂OH
Fischer projection is a two-dimensional representation of a three-dimensional molecule. In Fischer projection, the carbon atoms are drawn as vertical lines, and the hydrogen atoms and hydroxyl groups are drawn on the right-hand side or left-hand side of the carbon atoms. The carbonyl group is always drawn at the top of the Fischer projection.
The L-configuration is a type of configuration that is assigned to organic molecules based on the orientation of the hydroxyl group on the penultimate carbon atom. If the hydroxyl group is on the left-hand side of the Fischer projection, the molecule is assigned the L-configuration. If the hydroxyl group is on the right-hand side of the Fischer projection, the molecule is assigned the D-configuration.
In the Fischer projection of L-ketononose, the hydroxyl group on the penultimate carbon atom is on the left-hand side, so the molecule is assigned the L-configuration.
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Ben wants to test whether the material used to make a disposable cup affects the amount of thermal energy transferred to a person's hand. He investigates by carefully pouring the same volume of 90°C water into a foam cup and into a paper cup.
Which additional step in the investigation will help Ben determine which material reduces thermal energy (heat) transfer to the hand of a person holding the cup?
A.Stir the water in each cup for 10 minutes before measuring its temperature.
B.Measure the outside surface temperature of each cup after 10 minutes.
C.Vary the amount of water held by each cup before measuring its temperature.
Answer:
The answer would be B
Explanation:
C does not make sense and A will not affect anything
Measure the outside surface temperature of each cup after 10 minutes is the additional step in the investigation.
What is Temperature?This is defined as the degree of hotness or coldness of a substance and is measured in Celsius or Kelvin.
Determining which material reduces thermal energy will involve measuring the outside surface temperature of each cup after 10 minutes for the difference.
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Why must an electron absorb a quantum of energy to move to a higher energy level?
Answer:
For an electron they start at the first level (n=1) In order to move up to the next level (n=2) the amount of quantom energy to move to this next level the energy must be perfect in order to move. If the quantom energy is to small the electron it doesn't try.
Which change is an environmental effect of destroying wetlands?
loss of habitat
less flooding
smog
acid rain
Answer: Trust me 100% plz its loss of habitat wat they said
Explanation:
Please I neeed help, I have to write: four ammonia molecules (NH3) react with four oxygen molecules(O2) to form four nitrogen monoxide molecules (NO) and six water molecules. All substances are in gaseous state and heat is released in the chemical reaction
Explanation:
the equation must be
4NH3 + 5O2–> 4NO + 6H2O
When the offspring has a new genetic variation that a government neither of us parents it is called
In a solution, litmus is blue. The pH of the solution could be
1. 10
2. 2
3. 3
4. 4
Answer:
1. 10
Explanation
when litmus paper is blue that means the solution is basic and 10 on the pH scale is the most basic out of all your options
How
many
moles of water are produced from 12.8 moles of oxygen?
with work
Answer:
12.8 moles
Explanation:
The formula for water is H2O, so for every mole of water, there are two moles of hydrogen and one mole of oxygen.
As the ratio of oxygen particles to water particles is one to one, 12.8 moles of oxygen are required to produce 12.8 moles of water.
Therefore, 12.8 moles of water are produced from 12.8 moles of oxygen (assuming hydrogen is available in excess).
1.) Magnesium reacts with oxygen and forms magnesium oxide. Write the reaction, and explain how you would find the oxidizing agent
2.) What are two advantages and one disadvantage of fuel cells
3.) How are voltaic and electrolytic cells similar, and how are they different? Include electrodes and their charges in your answer
Answer:
See explanation
Explanation:
1) The reaction of magnesium with oxygen is;
Mg(s) + O2(g) -----> MgO2(s)
The oxidizing agent is the reactant whose oxidation number decreases from left to right in the reaction equation. The oxidation state of oxygen decreased from zero to -2 hence oxygen is the oxidizing agent in the reaction.
2) The advantages of fuel cell includes;
i) it is a clean source of energy
ii) Fuel cells operate quietly and do not constitute noise pollution
One disadvantage of the fuel cell is that its operation is costly.
3) Electrolytic and voltaic cell are similar because they are both electrochemical cells and involve a transfer of electrons between two electrodes.
Electrolytic cells do not operate spontaneously while voltaic cells operate spontaneously. In the volatic cell the anode is negatively charged while the cathode is positively charged. In the electrolytic cell, the anode is positively charged while the cathode is negatively charged.
[tex]plz \: help \: me \: it \: is \: due \: 2moro[/tex]
Answer:
hi.
Explanation:
1. B
2. C
3. A
4. B
5.B
hope this helps
When the air near the surface is heated, it rises, taking heat with it. The type of energy transfer involved here is what?
Which statement describes a space-filling model of a molecule?
A.The radii of the atoms are represented by the symbol of the atom surrounded by dots in the
space-filling model.
B.The radii of the spheres in a space-filling model are proportional in size to the radil of the atoms
they represent
C.The radii of the atoms present in the compound determine the length of the bonds in a space-
filling model.
Answer:
Option B, In a space-filling model of a molecule, the radii of the spheres in a space-filling model are proportional in size to the radii of the atoms
they represent
Explanation:
In a space-filling model of a molecule, atoms are represented as sphere. The radius of the sphere is equal to the radius of the atom and the distance between the center of one sphere to the center of other represents the distance between the atomic nuclei
Option B is correct
Option A is incorrect, as dots are used in the space filling model to represent the atoms
Option C is incorrect because radii of atom do not represents the length of the bonds in a space- filling model
This sea grass has had the sun shining on it for most of the day. What can the sea grass do because it is in sunlight? What does this mean for the number of energy storage molecules in the sea grass?
The sea grass can
Answer:
I don't really get your question but I think my answer relates to your question :)
Explanation:
Due to the high availability of sunlight, sea grass can get the sufficient light energy to carry photosynthesis and storage of energy.
What is photosynthesis ?Photosynthesis is a biochemical process by which green plants synthesis energy and in the leaves by the aid of light energy. Here, the light energy is converted to chemical energy.
Plants need sunlight for the light reaction of photosynthesis. In the absence of sunlight, they cant synthesis energy and the chlorophyll does not get active. They will grow towards sunlight.
The sea grass are getting sufficient light energy for the synthesis of energy. The energy storage molecules ie. ATP in sea grass will be synthesized in higher rate with the presence of sun shining.
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during what part of the day (night or day) can a solar be observed? explain your answer.
subject is science, please help me thx yal
what is the enthalpy of the overall chemical reaction ch4(g)+4cl2(g)- ccl4(g)+4hcl(g)?
1. -205.7kj
2. -113.4kj
3. -14.3kj
4. 78.0kj
Answer:
-205.7kj
Explanation:
Now adding reaction 2 and twice of reaction 3 and reverse of reaction 1, we get the enthalpy of the reaction.
The expression for enthalpy for the following reaction will be,
where,
n = number of moles
Now put all the given values in the above expression, we get:
Therefore, the enthalpy of the following reaction is, -205.7kj
Why is it important for the daughter cells to divide a second time in meiosis?
The second division switches parts of matching chromatids to increase genetic variation.
The second division forms four identical cells to ensure that all offspring have the same
The second division sorts chromosomes into cells that are the same as the parent cells.
The second division forms haploid cells that can combine with other haploid cells during fertilization.
Answer:
The second division switches parts of matching chromatids to increase genetic variation.
Explanation:
Meiosis and fertilization create genetic variation by making new combinations of gene variants (alleles).
Phosphoric acid is delivered to a drinks factory in
concentrated form. Why do you think the acid is not
diluted before transporting it?
Answer:
Because it might be reactive or may lose its property in liquid form..
With the dilution of phosphoric acid, its volume will increase. To avoid the transport cost the acid might not be diluted before transporting.
What is the food additive?
Food additives are the chemicals that are used in food products, that prevent food from spoiling due to bacterial growth.
Food additives are a kind of food preservative that is added to food products to prevent spoilage and retain their nutritional value for a long time. These additives inhibit microbial growth in food.
Different types of food additives are preservatives, nutrients, sweeteners, flavoring agents, antioxidants, and colorants.
Phosphoric acid acts as a preservative and prevents the growth of mold and bacteria in foods with sugary solutions. This increases the shelf life of that beverage and improves affordability.
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What is the pH at the equivalence point in the titration of 10.0 mL of 0.39 M HZ with 0.200 M NaOH? Ka = 2.4 × 10−6 for HZ.
Answer:
pH = 9.37
Explanation:
The reaction of HZ with NaOH occurs as follows:
HZ + NaOH → H₂O + Na⁺ + Z⁻
When the reaction is in the equivalence point, the moles added of HZ = Moles of NaOH.
At equivalence point, you will have in solution just NaZ that is in equilibrium with water as follows:
Z⁻(aq) + H₂O(l) ⇄ OH⁻(aq) + HZ(aq)
Where K of equilibrium is Kw / Ka = 1x10⁻¹⁴ / 2.4x10⁻⁶ = 4.17x10⁻⁹
And K is defined as:
K = 4.17x10⁻⁹ = [OH⁻] [HZ] / [Z⁻]
To solve this question we must find [Z⁻] and as [OH⁻] and [HZ] comes from the same equilibrium, both are equal and we can find [OH⁻] in order to solve pH:
Moles NaOH added = Moles HZ:
0.010L * (0.39mol / L) = 3.9x10⁻³ moles HZ = Moles NaOH added
The volume of 0.200M NaOH must be:
3.9x10⁻³ moles * (1L / 0.200moles) = 0.0195L.
The moles of HZ = Moles Z⁻ after the reaction and the volume is 0.010L + 0.0195L = 0.0295L. Thus, [Z⁻] is:
[Z⁻] = 3.9x10⁻³ moles / 0.0295L
[Z⁻] = 0.132M
Replacing in K expression:
4.17x10⁻⁹ = [OH⁻] [HZ] / [Z⁻]
4.17x10⁻⁹ = [X] [X] / [0.132]
5.51x10⁻¹⁰ = X²
X = 2.35x10⁻⁵M = [OH⁻]
As pOH = -log [OH⁻]
pOH = 4.63
And pH is
pH = 14 -pOH
pH = 9.37If you know about crystals can you tell me if this is real or fake because I purchased this item and don’t know
why is the absolute dating of rocks important?
Answer:
The dating of rocks is important because:
Explanation:
its important to know how the rocks have changed.
What is the best common way to convert fossil fuels into energy?
a. oxidation
b. reaction
c. combustion
d. neutralization
Why would people with sickle-cell anemia get tired more easily than healthy people?
Explanation:
Because sickle-cells have trouble traveling through the smallest blood vessels, which means that muscles and tissue are not getting oxygen they need.