Answer:
The difference between saturated and unsaturated fat lies in the number of double bonds in the fatty acid chain. ... Saturated fats tend to be solid at room temperature and from animal sources, while unsaturated fats are usually liquid and from plant sources
Explanation:
Help please...........
The molecule with only single covalent bonds is _. (C) *
CO2
СО
CI2
ON2
Answer:
CO (carbon monoxide)
Explanation:
How does the air temperature at the bottom of a mountain compare with the air temperature at the top of the mountain?
A. The air is colder at the bottom.
B. The air is warmer at the top.
C. The air temperature at the top is lower.
D. The air temperature is the same.
Explanation: C) the air temp. at the top is lower
`1. the products in a reactions will always have...
(a) the same total mass as the reactants
(b)the same number of molecules as the reactants
(c) less mass than the reactants
(d) a greater number of molecules than the reactants
Answer:
a
Explanation:
as the law of conservation of matter (mass) states: matter can not be created nor destroyed but can transform from a form to another.
since the conversion of mass to energy can not be done except in nuclear reactions via (E= mc2). normal chemical equations must be balanced to achieve the law.
50 points
In the image below, light is displayed as particles called photons. Research to find out what photons are and then explain in your own words why they can be useful for modeling light.
Answer:
A photons is a particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.
Explanation:
Light consists of packets of energy (photons) that can only interact with the atoms and molecules of matter by being absorbed or emitted in discrete units. ... Photons carry momentum and energy like particles, but they also have a frequency and a wavelength like a sinusoidal wave. Thanks to photons we know that all quantum particles have both the properties of waves and particles. I hope it helps✌️
A student titrating a sample of a powdered aspirin tablet to find out how much acetylsalicylic acid is in the sample finds that it requires 15.5 mL of a 0.109 M sodium hydroxide solution to neutralize the acid in the sample. How many milligrams of acetylsalicylic acid did the sample contain? Use the correct number of significant figures and do not include units or your answer will be counted wrong.
Answer:
305 mg
Explanation:
The equation of the reaction is;
C9H8O4 + NaOH = C9H7O4Na + H2O
Amount of NaOH reacted = 15.5/1000 L * 0.109 M = 1.69 * 10^-3 moles
Since the reaction has a 1:1 mole ration, 1.69 * 10^-3 moles of acetylsalicylic acid reacted.
Assuming all the acetylsalicylic acid reacted, then mass of acetylsalicylic acid present = 1.69 * 10^-3 moles * 180.158 g/mol = 0.305 g or 305 mg
According to an energy pyramid model, which trophic level is expected have the largest biomass in land ecosystems ?
Answer:
According to an energy pyramid model, Producer is expected have the largest biomass in land ecosystems
Explanation:
In a trophic level, the producers possess the largest biomass. With the increasing trophic level, the biomass reduces. Hence, the producers at the base have high biomass.
On terrestrial ecosystem, the producers are the plants and trees and hence the greatest biomass exists in the plants and trees.
Hence, in an energy pyramid model, Producer is expected have the largest biomass in land ecosystems
an object with a mass of 10.0 kg is moving at a speed of 5.00m/s. The kinetic energy of the mass is
a. 50.0j
b. 2.00j
c. 125j
d. 250j
The mass and velocity of an object determines its kinetic energy. The kinetic energy of the substance with mass of 10 kg and speed of 5 m/s is 125 J. Hence, option b is correct.
What is kinetic energy ?Kinetic energy of an object is generated by virtue of its motion. The kinetic energy is dependent to the mass and speed of the object by the expression written below;
Ke = 1/2 mv²
Therefore, as the mass or speed or both increases kinetic energy increases. When an object starts moving its potential energy gets converted to kinetic energy.
Given that mass = 10 Kg
speed = 5 m/s
then Ke = 1/2 10 kg × 5 m/s × 5 m/s = 125 J
Therefore, the kinetic energy of the object is 125 J, option c is correct.
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i really kinda need some hell right now :)
how many molecules are in 6.31 moles of CO2
Answer:
Quantity of substance = (number of moles / number of molecules)
Explanation:
How much does carbon dioxide weigh?
Give me the answer to calculate for you
5.
Which is the best example of Newton's Second Law of Motion?
Answer:
ok so if I remember correctly then it basically its like if I have a baseball and throw it full force the the ball will go far because the mass is light and the force was great but if I get a bowling ball and do the same with equal force it will go shorter than the base ball because the mass if more than the force I put in
The barometer at an indoor pool reads 105.00 kPa. If the temperature in the room is 26c, what is the patial pressure of the "dry" air??
a. 30.88 kPa
b. 101.60 kPa
c. 108.40 kPa
d. 357.00 kPa
Answer:
Option B. 101.60 KPa
Explanation:
From the question given above, the following data were obtained:
Total pressure (Pₜ) = 105.00 KPa
Partial pressure of wet gas (Pᵥᵥ) at 26 °C = 3.4 KPa
Partial pressure of dry gas (Pₔ) =?
Total pressure = partial pressure of dry gas + partial pressure of wet gas
Pₜ = Pₔ + Pᵥᵥ
105 = Pₔ + 3.4
Collect like terms
105 – 3.4 = Pₔ
Pₔ = 101.60 KPa
Therefore, the partial pressure of the dry gas is 101.60 KPa
How does Barium obey the octet rule when reacting
to form compounds?
A. It gains electrons
B. It gives up electrons
C. It does not change its number of electrons
D. Oxygen does not obey the octet rule.
Answer:
it gives up electrons B. because the bond between the electrons is not very strong due to how few of them there are
Explanation:
Which diagram shows how CH3Br and OH must collide in order to react and form CH2OH? (Marking brainliest!)
Answer:
Its B
Explanation:
I just took the quiz.
When [tex]CH_{3} Br[/tex] and OH collide in order to react and form [tex]CH_{3} OH[/tex] , such reaction will be best represented by diagram (B).
What is reaction?A chemical reaction would be a procedure that causes one group of chemical components to change chemically into another. In a chemical reaction, one or even more substances also known as reactants would be changed into one or more additional materials known as products. Chemical elements and chemical compounds make up substances.
What is collide?A colloid would be a mixture wherein the component made up of insoluble particles that are scattered at a microscopic scale is suspended within another component.
When
[tex]CH_{3} Br + OH[/tex] → [tex]CH_{3} OH + Br[/tex].
By the Collison of methyl bromide with OH ion then methyl alcohol will be formed.
Therefore, when [tex]CH_{3} Br[/tex] and OH collide in order to react and form [tex]CH_{3} OH[/tex] , such reaction will be best represented by diagram (B).
Therefore, the correct answer will be option (B).
To know more about Collison
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Describe the stages of water cycle
What category of biological molecules are steroids included in?
Answer:
Lipids
Explanation:
Lipids are a class of macromolecules that are nonpolar and hydrophobic in nature. Major types include fats and oils, waxes, phospholipids, and steroids.
Hope this helps!
An oxygen molecule is adsorbed on a patch of surface (see sketch at right). This patch is known to contain adsorption sites. The molecule has enough energy to move from site to site, so it could be on any one of them. Suppose part of the surface becomes inaccessible, so that only adsorption sites are now available for the molecule. Calculate the change in entropy. Round your answer to significant digits, and be sure it has the correct unit symbol.
This question is incomplete, the complete question is;
An oxygen (O₂) molecule is adsorbed on a patch of surface (see sketch at right). This patch is known to contain 324 adsorption sites.
The (O₂) molecule has enough energy to move from site to site, so it could be on any one of them.
Suppose part of the surface becomes inaccessible, so that only 400 adsorption sites are now available for the molecule.
Calculate the change in entropy.
Round your answer to 3 significant digits, and be sure it has the correct unit symbol.
Answer:
the change in entropy is 2.91 x 10⁻²³ J/K
Explanation:
Given the data in the question;
For an ideal gas,
Entropy of a molecule, S = K[tex]_B[/tex] ln(W)
where K[tex]_B[/tex] is Boltzmann constant (1.38065 x 10⁻²³ J/K)
W is Equivalent micro states of the molecule
( W[tex]_{initial}[/tex] = 324 and W[tex]_{final}[/tex] = 400 )
S[tex]_{final}[/tex] - S[tex]_{initial}[/tex] = K[tex]_B[/tex] ln(W[tex]_{final}[/tex]) - K[tex]_B[/tex] ln(W[tex]_{initial}[/tex] )
ΔS = K[tex]_B[/tex] ln(W[tex]_{final}[/tex] / W[tex]_{initial}[/tex] )
we substitute
ΔS = (1.38065 x 10⁻²³ J/K) × ln( 400 / 324 )
ΔS = 2.9093 x 10⁻²³ J/K
ΔS = 2.91 x 10⁻²³ J/K
Therefore, the change in entropy is 2.91 x 10⁻²³ J/K
A hydrate of zinc chlorate, Zn(CIO3)2·XH20, contains 21.5% zinc by mass. Find the value of X.
Answer:
What I've done:
Molar mass of Zn: 65.409 g/mol
Molar mass of Cl: 2*35.453 =70.906 g/mol
Molar mass of O: 6*15.9994 =95.9964 g/mol
Total molar mass of Zn(ClO3)2: 232.3114 g/mol
21% of molar mass = 232.3114 g/mol
100% of mass = 1106.244762 g/mol
Molar mass of H2O: 18.01528 g/mol
232.3114 g/mol + 18.01528 g/mol = 250.32668 g/mol
250.32668 = 1106.244762
1106.244762 g/mol divided by 232.3114 g/mol
x = 4.419
Explanation:
% anything = (g/total mass)*100 = ?
Atomic mass Zn = 65.4 from your post.
molar mass Zn(ClO3)2 from your post = 232.3
molar mass H2O = 18
The 21.5% Zn is (note you used 21%) percent Zn in the hydrate so
%Zn = [(65.4)/(232.3 + x*18)]*100 = 21.5%
Solve for x and I obtained 3.99 which rounds to 4.00. Let me know if you don't understand any part.
what is the kg of the net force is 30 N and the acceleration is 6 m/s 2
Answer:
5kg
Explanation:
Use the law: F=MA
F= force which is newton
M= mass which is kg
A= acceleration which is [tex]m/s^{2}[/tex]
Softening of water is the application of
Answer:
Water softening is the process of removing the dissolved calcium and magnesium salts that cause hardness in water
Explanation:
25. Classify the following as element, compound or mixture and explain how do you know?
a) NaCI + H2O
b) C2H4O
c) O2
d) Co
e) CO
f) H2 + O2
g) H2O2
Answer:
A Mixture
B compound
C element
D element
E. Compound
F mixture
G compound
Explanation:
A compound is formed from the chemical reaction between two or more atoms
A Mixture is formed when two or more elements are physically combined
An element is any substance that contains only one kind of an atom
Please help me it’s my birthday
Answer:
ur answer would be D.)
Explanation:
Hope this helps
also happy birthday
Water is stored in the _________________________ until it is used by the cell.
Answer:
cell sap :)
Explanation:
Answer:
well
Explanation:
Please help due tofay
Answer:
I only know the answer to the second one, The bond that occurs between two metal atoms is a metallic bond
I need help please....
Answer:
19. C 20. A 21. H 22. G 23. D 24. F 25. B 26. E
Explanation:
Just learnt it in science class
Why is having a healthy lion population in an African savanna important for maintaining biodiversity in that ecosystem?
C
If the population of lions decreases, there would be less water available for other animals like zebras and antelopes, leading to drought in the ecosystem.
.
The lions are better at hunting animals like zebras and antelopes, ensuring that other predators like cheetahs and hyenas will be outcompeted and eventually become
extinct.
.: +
O
The lions eat enough of the zebras, antelopes, and other plant-eating animals to ensure that they do not overgraze the grass and trees, leading to starvation of the other
animals.
Without the lions to eat animals like zebras and antelopes, there would be fewer predators to consume these animals, causing the zebras and antelopes to consume each
other.
K
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AQDd
1:45 PM
3/11/2021
Answer:c
Explanation:
The healthy lion population in the African savanna has been important as the decrease in the population of lions results in the increase in the increased population of zebras and antelopes and thereby the increased overgrazing. Thus, option C is correct.
In an ecosystem, the biotic components have been arranged in the pyramidical order that has been able to maintain a healthy ecosystem.
The increase or decrease in the level of the ecosystem results in the disturbed ecosystem and thereby the biodiversity. The African savanna has been the forest ecosystem. It has been photosynthetic plants, followed by primary, secondary, and tertiary consumers.
The lion has been the secondary consumer in the forest system. The lions have been able to consume the primary consumers and maintain the balance in the ecosystem.
However, with the decrease in the lion population in the ecosystem, there has been a proportional increase in the population of the primary consumers such as zebras, and antelopes.
The increase in primary consumers results in overgrazing and thereby the starvation of other primary consumers with a decrease in the producers.
Thus, a decrease in the lion population results in disturbing the biodiversity of the ecosystem with an increase in the population of zebras and antelopes. Thus, option C is correct.
For more information about the African Savannas ecosystem, refer to the link:
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words that mean the same thing
decrease,
diminish,
dwindle
Answer:
Subside
Explanation:
Answer:
lower, reduce, decline
Explanation:
Faces:
13. Explain why a solution containing both NH3 and NH4Cl is less basic than a solution
containing only NH3 of the same concentration.
Answer:
In a solution containing ammonia solution and ammonium chloride, ammonia hydrolyses in water to produce hydroxyl ions.
NH3 +H2O → NH4+ + OH-
Ammonium chloride ionises in the solution to produce ammonium ions and chloride ions where the ammonium ions undergo hydrolysis to produce more ammonia solution.
[tex]NH _{4} Cl→NH _{4} {}^{ + } + Cl {}^{ - } [/tex]
Match the procedural step to its purpose by dragging each step in the written procedure for the Fischer esterification of benzoic acid with methanol in the presence of mineral acid into the appropriate box. Purpose: Flat-bottomed flasks transfer heat in an uneven fashion, and may fracture if heated strongly. Procedure: Purpose: Methanol, which is used as a reagent and solvent, is flammable. Prodedue: Purpose: The unreacted carboxylic acid was neutralized under mild conditions. Procede: Purpose: Water needs to be removed before the liquid ester product is collected. Procedure:
Answer:
Explanation:
The task in this question is to match the right procedure to its purpose. It explains the procedure for the preparation of Fischer Esterification. Fischer Esterification Mechanism should incorporate the ceaseless expulsion of water from the framework or the use of a huge amount of excess alcohol since the general reaction is reversible. Fischer Esterification act as an organic reaction that is utilized to change over carboxylic acids within the sight of excess alcohol and a solid corrosive catalyst (acid) to give an ester as the eventual outcome.
Procedure Purpose
[tex]\text{Flat bottomed flask transfer}\\ \\ \text{ heat in an uneven fashion and } \\ \\ \text{ may fracture if heated strongly}[/tex] [tex]\text{The reagents were added to a} \\ \\ \text{round bottom flask prior to the }\\ \\ \text{reaction being heated under reflux}[/tex]
[tex]\text{Methanol which used as a reagent} \\ \\ \text{and solvent is flammable}[/tex] [tex]\text{The solution of benzoic acid and }\\ \\ \text{methanol was heated on steam bath}[/tex]
[tex]\text{The unreacted carboxylic acid was} \\ \\ \text{neutralized under mild conditions}[/tex] [tex]\text{The reaction mixture was washed} \\ \\ \text{ with sodium bicarbonate solution}[/tex]
[tex]\text{Water needs to be removed before the} \\ \\ \text{ liquid ester product was collected}[/tex] [tex]\text{Magnesium sulphate is added to the} \\ \\ \text{ dichloromethane layer before} \\ \\ \text{ the solvent is distilled off}[/tex]
whats a particle of electormagnetic radiation
Answer:
Scientists have observed that electromagnetic radiation has a dual "personality." Besides acting like waves, it acts like a stream of particles (called "photons") that have no mass. The photons with the highest energy correspond to the shortest wavelengths.
Explanation:
Hope It Help