Answer:
61.4 %
Explanation:
Let's consider a generic chemical reaction.
Reactants ⇒ Products
The theoretical yield is the maximum mass of product that theoretically can be obtained from the chemical reaction.
The actual yield is the mass of the product obtained from the reaction.
The percent yield is:
Percent yield = actual yield / theoretical yield × 100%
Percent yield = 60.9 g / 99.2 g × 100% = 61.4 %
can anybody help me with this ?
the regular sequence of growth and division that cells undergo is called the?
Answer:
Cell cycle.
Explanation:
A cell can be defined as the fundamental or basic functional, structural and smallest unit of life for all living organisms. Some living organisms are unicellular while others are multicellular in nature.
A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.
Generally, cells have the ability to independently replicate themselves. These cells can be compared to the kind of structures found in a business or factory, where you have different workers performing different functions.
In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles and they include nucleus, cytoplasm, cell membrane, golgi apparatus, mitochondria, lysosomes, ribosomes, chromosomes, endoplasmic reticulum, vesicles, etc.
The regular sequence of growth and division that cells undergo is called the cell cycle. This cycle makes it possible for the cells found in living organisms to divide and produce new cells.
Basically, there are four (4) phases of the cell cycle and these are;
I. Prophase.
II. Metaphase.
III. Anaphase.
IV. Telophase.
Write the molecular formula for a compound with the possible elements C, H, N and O that exhibits a molecular ion at M
Answer:
[tex]= \mathbf{C_3H_6O}[/tex]
Explanation:
From the given information, since the molecular mass of the ion M+ is not given;
Let's assume M+ = 58.0423
So, by applying the 13th rule;
we will need to divide the mass by 13, after dividing it;
The quotient n = no. of carbon; &
The addition of the quotient (n) with the remainder r = no. of hydrogen.
So;
[tex]\dfrac{58}{13}= 4 \ remainder \ 6[/tex]
So;
[tex]C_nH_{n+r} = C_4H_{4+6}[/tex]
[tex]= C_4H_{10}[/tex]
From the given information; we have oxygen present, so since the mass of oxygen = 16, we put oxygen in the molecular formula by removing [tex]CH_4[/tex]. Also, since the mass is an even number then Nitrogen is 0.
So, we have:
[tex]= \mathbf{C_3H_6O}[/tex]
HELP PLEASE
Sometimes people mistakenly state that velocity and speed are the same thing. People might make such a mistake because they forget that velocity describes both speed and _______.
•volume
•force
•the time interval
•direction
Answer:
force
Explanation:
Atoms or clusters of atoms that are covalently bonded to carbon and influence the behavior of organic compounds are known as
Answer:
Functional groups
Explanation:
A functional group refers to an atom or cluster of atoms that are covalently bonded to carbon and influence the behavior of organic compounds.
There are several functional groups in organic chemistry that determine the properties of organic compounds.
For instance, in the compound CH3CH2CH2CH2OH, the functional group is the -OH group. The chemical and physical properties of this compound is largely determined by this functional group.
A stock solution of Al(CH3COO)3 is available to prepare solutions that are more dilute. Calculate the volume, in mL, of a 2.0-M solution of Al(CH3COO)3 required to prepare exactly 250 mL of a 0.230-M solution of Al(CH3COO)3.
Answer:
[tex]28.75\ \text{mL}[/tex]
Explanation:
[tex]C_1[/tex] = Initial concentration = 2 M
[tex]C_2[/tex] = Final concentration = 0.23 M
[tex]V_1[/tex] = Initial volume
[tex]V_2[/tex] = Final volume = 250 mL
We have the relation
[tex]C_1V_1=C_2V_2\\\Rightarrow V_1=\dfrac{C_2V_2}{C_1}\\\Rightarrow V_1=\dfrac{0.23\times 250}{2}\\\Rightarrow V_1=28.75\ \text{mL}[/tex]
So, the required volume is [tex]28.75\ \text{mL}[/tex].
How many moles are present in 2.45 x 1023 molecules of CH ?
Answer:
the aware is 6182
Explanation:
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HELP WILL GIVE BRAINLIEST!
You are in the kitchen making your favorite recipe when you realize you’ve made a huge mistake instead of sugar, you just put a cup of salt into the oil. That will taste horrible! You are out of oil do you can’t throw it away and start again. What will you do?
Use what you know about physical properties and common separation techniques to remove the salt from the oil. Explain each step you’ll take abs the basic science behind it.
Answer:
cover the taste with sugar add two times the amount your supposed to put in
Explanation:
When the absolute value of the difference in electronegativity of two adjacent atom in a compound is 1, they are most likely bonded by ________.
Answer:polar covalent bond
Explanation:
Compounds are formed ether by donating, receiving or sharing of electrons making the bonds between them to be ionic, or covalent .
Now according to the rule of type of bond assignment due to electronegativity difference of atoms
---When the electronegativity difference is less than 0.5, the bond formed is nonpolar covalent.
---When the electronegativity difference is between 0.5 and 1.6, the bond is considered polar covalent
---When the electronegativity difference greater than 2.0, then the bond is ionic.
Therefore, When the absolute value of the difference in electronegativity of two adjacent atom in a compound is 1, they are most likely bonded by polar covalent bond eg HCl bond , CCL4 bond
What was the purpose of incubating your ubiquity plates upside down?
A.to prevent contaminating
B.to prevent condensation from forming on the agar surface
C. incubating plates upside down is an aseptic technique
D.to prevent organisms from over-growth
A balloon with a volume of 2.0 L is filled with a gas at 3 atmospheres. If the pressure is reduced to 0.5 atmospheres without a change in temperature, what would be the volume of the balloon?
Answer:
V2 = 12 L
Explanation:
Given the following data;
Initial volume = 2L
Initial pressure = 3 atm
Final pressure = 0.5 atm
To find the new volume V2, we would use Boyles' law.
Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.
Mathematically, Boyles law is given by;
[tex] PV = K[/tex]
[tex] P_{1}V_{1} = P_{2}V_{2} [/tex]
Substituting into the equation, we have;
[tex] 3 * 2 = 0.5V_{2} [/tex]
[tex] 6 = 0.5V_{2} [/tex]
[tex] V_{2} = \frac {6}{0.5}[/tex]
[tex] V_{2} = 12 [/tex]
V2 = 12L
Therefore, the new volume is 12 Liters.
what is the boiling point of water at the top of mount everest where the atmospheric pressure is only 34% as strong
This question is incomplete, the complete is;
Water has a heat of vaporization (ΔHvap) of 44.01 kJ mol-1 and boils at 100 degrees C at sea level.
What is the boiling point of water at the top of Mount Everest where the atmospheric pressure is only 34% as strong as the pressure at sea level?
Answer: the boiling point of water at the top of mount Everest where the atmospheric pressure is only 34% as strong is 74 °C
Explanation:
Given that;
P1 = 1 atm,
T1 = 100°C = 373 K
P2 = P1 × 34% = 1×0.34 = 0.34 atm
T1 = ?
ΔH = 44.01 kJ mol⁻¹ = 44.01×10³ J/mol
R = 8.314 J/k.mol
now using the Clausius - Clapeyron equation;
p1_∫^p2 d.InP = ΔHvap/R T1_∫^T2. 1/T².dT
⇒ In(P2/P1) = ΔHvap/R (1/T1 - 1/T2)
so we substitute;
ln( 0.34/1 ) = ( 44.01×10³ / 8.314) × ( 1/373 - 1/T2)
-1.0788 = 5293.4808 × ( 0.00268 - 1/T2)
-1.0788 = 14.1865 - 5293.4808(1/T2)
5293.4808(1/T2) = 14.1865 + 1.0788
5293.4808(1/T2) = 15.2653
(1/T2) = 15.2653 / 5293.4808
(1/T2) = 0.0028837
T2 = 1 / 0.0028837
T2 = 346.8 K
WE convert to Celsius
t2 =346.8 K − 273.15 = 73.65 °C ≈ 74 °C
Therefore, the boiling point of water at the top of mount Everest where the atmospheric pressure is only 34% as strong is 74 °C
A ______________________ is the distance from one compression to the next compression in a longitudinal wave.
A) frequency
B) amplification
C) rarefaction
D) wavelength
Answer: D
Explanation:
A wavelength is the distance from one compression to the next compression in a longitudinal wave. so, option D is correct.
What is wavelength ?A spectrum is the term used to describe the range of wavelengths or frequencies for wave phenomena. The term was originally used to describe the electromagnetic spectrum, but it is now used to describe the sound spectrum and vibration spectrum.
When electromagnetic radiation such as radio waves, light waves, or infrared waves travel across space, they leave behind distinctive patterns. Each wave has a distinct size and form. Wavelength is the separation between peaks.
In general, the electromagnetic spectrum is split into seven sections, rising in energy and frequency and decreasing in wavelength. Common names for these types of radiation include radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV) light, X-rays, and gamma rays.
Thus, option D is correct.
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Sudhi is studying the motion of a toy car. She places the car in the middle of the ramp and releases it.
which best describes the reference point in this scenario?
A: the top of the ramp
B: the bottom of the ramp
C: the ending position of the car
D: the starting position of the car
The reference point in this scenario is the starting position of the toy car.
What is reference point?A reference point is can be defined as the frame of reference or point mark from the various of measurement of the car's motion is determined.
When an object starts its motion from zero origin, its reference is point will be the zero origin.
Generally, the reference point of an object in motion is usually the starting position of the object.
Thus, the reference point in this scenario is the starting position of the toy car.
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"drivers license"
I got my driver's license last week
Just like we always talked about
'Cause you were so excited for me
To finally drive up to your house
But today I drove through the suburbs
Crying 'cause you weren't around
And you're probably with that blonde girl
Who always made me doubt
She's so much older than me
She's everything I'm insecure about
Yeah, today I drove through the suburbs
'Cause how could I ever love someone else?
And I know we weren't perfect but I've never felt this way for no one
And I just can't imagine how you could be so okay now that I'm gone
Guess you didn't mean what you wrote in that song about me
'Cause you said forever now I drive alone past your street
And all my friends are tired
Of hearing how much I miss you but
I kinda feel sorry for them
'Cause they'll never know you the way that I do
Yeah, today I drove through the suburbs
And pictured I was driving home to you
And I know we weren't perfect but I've never felt this way for no one
Oh, and I just can't imagine how you could be so okay now that I'm gone
I guess you didn't mean what you wrote in that song about me
'Cause you said forever now I drive alone past your street
Red lights
Stop signs
I still see your face
In the white cars
Front yards
Can't drive past the places
We used to
Go to
'Cause you know I still love you, babe
Sidewalks
We crossed
I still hear your voice
In the traffic
We're laughing
Over all the noise
God, I'm so blue
Know we're through
But you know I still love you, babe
I know we weren't perfect but I've never felt this way for no one
And I just can't imagine how you could be so okay now that I'm gone
Guess you didn't mean what you wrote in that song about me
'Cause you said forever now I drive alone past your street
Yeah, you said forever now I drive alone past your street
Answer:
omg that song l0wkey but high.key slaps
can you not please? this is an education website
An iron bar of mass 841 g cools from 84°C to 7°C. Calculate the heat released (in kilojoules) by the metal.
Answer:
28.75211 kj
Explanation:
Given data:
Mass of iron bar = 841 g
Initial temperature = 84°C
Final temperature = 7°C
Heat released = ?
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
specific heat capacity of iron is 0.444 j/g.°C
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 7°C - 84°C
ΔT = -77°C
By putting values,
Q = 841 g × 0.444 j/g.°C × -77°C
Q = 28752.11 j
In Kj:
28752.11 j × 1 kJ / 1000 J
28.75211 kj
If you were an element, what element are you and in what another element would you like to bind with and why?
Answer:
If I were an element, I would want to be Carbon. I would want to combine with oxygen. It would create carbon dioxide. It has daily life uses. For heat, and for refridgment and more.
Explanation:
if a -2 ion has 34 protons, what element is it?
ANSWER
Selenium has 34 protons
Consider the chemical reaction
aC2H6 + bCO2 + cH2O → dC2H5OH,
where a, b, c, and d are unknown positive integers. The reaction mush be balanced; that is, the number of atoms of each element must be the same before and after the reaction. For example, because the number of oxygen atoms must remain the same,
2b+c=d.
While there are many possible choices for a, b, c, and d that balance the reaction, it is customary to use the smallest possible integers. Balance this reaction.
a=
b=
c=
d=
Explanation:
aC2H6 + bCO2 + cH2O → dC2H5OH
The balanced equation for the reaction is given as;
6C2H6 + 2CO2 + 3H2O → 7C2H5OH
Check!
Oxygen
Reactant = 2 * 2 + 3 = 7
Product = 7
Carbon
Reactant = 6 * 2 + 2 = 14
Product = 7 * 2 =14
Hydrogen
Reactant = 6 * 6 + 3 * 2 = 42
Product = 7 * 5 + 7 * 1 = 42
a = 6
b = 2
c = 3
d = 7
Rank the nonmetals in each set from most reactive (1) to least reactive (3).
Bromine: ?
Chlorine: ?
Iodine: ?
Answer:
Chlorine Bromine IodineExplanation:
All three of these elements fall in group 7 of the periodic table and are called Halogens. Chlorine is the most reactive of these elements because it comes before the other two in the table then followed by Bromine and then Iodine.
Reactivity decreases in the group 7 elements as one moves to the latter elements due to the increase in shells surrounding the nucleus.
This is because reactivity happens as the protons in the nucleus attract electrons but when more shells are piled on, the strength of this attraction decreases as the distance increases such that they will not be as reactive anymore.
Give 8 example of application
Explanation:
Examples of an application include a word processor, a spreadsheet, an accounting application, a web browser, an email client, a media player, a file viewer, simulators, a console game, or a photo editor.
When a particle is moving fast it has a lot of kinetic energy in it. ?
Answer:
Random particle motion in liquids and gases is a difficult concept for in temperature, the particles move faster as they gain kinetic energy.
Explanation:
4.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of 152. gimol, is burned completely in excess oxygen, and the mass of the products carefully measured:
product mass
carbon dioxide 5.79 g
water 2.84 g
Use this information to find the molecular formula of X.
Answer:
C₄H₁₀O₄
Explanation:
From the question given above, the following data were obtained:
Mass of compound = 4 g
Molar mass of compound = 152 g/mol
Mass of CO₂ = 5.79 g
Mass of H₂O = 2.84 g
Molecular formula of compound X =?
Next, we shall determine the mass of Carbon, Hydrogen and Oxygen in the compound. This can be obtained as follow:
For Carbon (C):
Mass of CO₂ = 5.79 g
Molar mass of CO₂ = 12 + (2×16) = 44 g/mol
Mass of C = 12/44 × 5.79
Mass of C = 1.58 g
For Hydrogen (H):
Mass of H₂O = 2.84 g
Molar mass of H₂O = (2×1) + 16 = 18 g/mol
Mass of H = 2/18 × 2.84
Mass of H = 0.32 g
For Oxygen (O):
Mass of C = 1.58 g
Mass of H = 0.32 g
Mass of compound = 4 g
Mass of O =?
Mass of O = (Mass of compound) – (Mass of C + Mass of H)
Mass of O = 4 – (1.58 + 0.32)
Mass of O = 4 – 1.9
Mass of O = 2.1 g
Next, we shall determine the empirical for compound X. This can be obtained as follow:
C = 1.58 g
H = 0.32 g
O = 2.1 g
Divide by their molar mass
C = 1.58 / 12 = 0.13
H = 0.32 / 1 = 0.32
O = 2.1 / 16 = 0.13
Divide by the smallest
C = 0.13 / 0.13 = 1
H = 0.32 / 0.13 = 2.46
O = 0.131 / 0.13 = 1
Multiply by 2 to express in whole number
C = 1 × 2 = 2
H = 2.46 × 2 = 5
O = 1 × 2 = 2
Thus, the empirical formula for the compound is C₂H₅O₂
Finally, we shall determine the molecular formula for the compound. This can be obtained as follow:
Molar mass of compound = 152 g/mol
Empirical formula => C₂H₅O₂
Molecular formula =?
Molecular formula => [C₂H₅O₂]ₙ
[C₂H₅O₂]ₙ = 152
[(2×12) + (5×1) + (2×16)]n = 152
[24 + 5 + 32]n = 152
61n = 152
Divide both side by 61
n = 152 / 61
n = 2
Molecular formula => [C₂H₅O₂]₂
Molecular formula => C₄H₁₀O₄
i need help ASAP why does detergent turn white in the water when it’s mixed with water
Answer:
because the soap and the water mix and make bubblesl
Explanation:
How many hydrogen atoms in the
molecule (NH4)2C8H402?
Answer:
12 hydrogen atoms
Explanation:
Let's consider the chemical formula of the compound (NH₄)₂C₈H₄O₂.
We can see the ammonium ion, NH₄⁺, which contains 4 hydrogen atoms. However, this ion is enclosed in parenthesis with a subindex 2. That means that we have to multiply the whole ion by 2, therefore resulting in 8 atoms of hydrogen. Then, in C₈H₄O₂, we can see another 4 hydrogen atoms. The total number of hydrogen atoms in 1 molecule of (NH₄)₂C₈H₄O₂ is 8 + 4 = 12 hydrogen atoms.
What is the name of the element
hydrogen
helium
lithium
beryllium
boron
carbon
nitrogen
oxygen
fluorine
neon
the bunsen burners in your labs are fueled by natural gas which is mostly methane. the thermochemical equation for the combustion of methane is
Answer:
CH₄ + 2O₂ —> CO₂ + 2H₂O
Explanation:
The thermochemical equation for the combustion of methane can be obtained as follow:
Methane (CH₄) under goes combustion in the presence of air (O₂) to produce carbon dioxide (CO₂) and water (H₂O). This can be represented in the equation below:
CH₄ + O₂ —> CO₂ + H₂O
Thus, we can balance the equation as follow:
CH₄ + O₂ —> CO₂ + H₂O
There are 4 atoms of H on the left side and 2 atoms on the right side. It can be balance by putting 2 in front of H₂O as shown below:
CH₄ + O₂ —> CO₂ + 2H₂O
There are a total of 4 atoms of O on the right side and 1 atom on the left side. It can be balance by putting 2 in front of O₂ as shown below:
CH₄ + 2O₂ —> CO₂ + 2H₂O
Now the equation is balanced.
g what happens to rate of decomposition when a catlyst is added to hydrogen peroxide solution (H2O2) Does rate increase or decrease
Answer:
Increases
Explanation:
When a catalyst is added to hydrogen peroxide,the rate of decomposition Increases.
In living organisms, hydrogen peroxide is gotten through metabolism and it has to be broken down. This is because it could become toxic if it gets to be concentrated.
We can increase the rate of decomposition reaction through the addition of a catalyst. This breaks it down into hydrogen and water
1. A 40,000 kg plane is accelerating at a rate of 4m/s2. How much force does the engine put forth?
Answer:
160000
Explanation:
F=ma
m=40000
a=4
if a 40,000 kilogram plane is accelerating at a rate of 4 meters/second², then the force generated by the engine would be 160000 Newtons.
What is Newton's second law?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
As given in the problem we have to find out the force generated by the engine of the plane if a 40,000-kilogram plane is accelerating at a rate of 4 meters/second²,
The mass of the plane = 40000 kilograms
The acceleration of the plane = 4 meters/second²
The force generated by the engine of the plane = 40000×4
= 160000 Newtons
Thus, the engine would generate a force of 160000 Newtons.
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.
Animals that rely on plants to transform chemical energy into carbohydrates and sugars are
A. primary producers.
B. first level consumers.
C. second level consumers.
D. detritivores,
Answer:
B. first level consumers.
Explanation:
The first level consumers are also the primary consumers. They are the animals that depends or rely on plants to transform chemical energy into carbohydrates and sugar.
Primary consumers are mostly herbivores. They feed on plant matter by which they derive their nutrition. They have special enzymes that helps to convert plant materials into substances needed for their body.
So, the first level consumer takes plant matter and convert them into useful food materials for their own nutrition.
The second level consumers depend on the first level consumers for nutrition.
