Answer:
Commercially, 2-methylpentenal is synthesized by the aldol condensation of propanal in the presence of liquid base like KOH or NaOH in stoichiometric amount,,. Under optimum reaction conditions, 99% conversion of propanal is achieved with 86% selectivity of 2-methylpentenal using liquid base.
Explanation:
hope this helps
Answer:
HMM, what the person above said.
Which option describes cations?
A: elements that readily give off electrons in a chemical reaction
B: a family of elements located in Group 17 of the periodic table
C: positively charged ions
D: elements that tend to accept electrons when they engage in chemical reactions
Answer:
C: positively charged ions
Explanation:
C: positively charged ions
The half life of Uranium-238 is 4.5 billion years and the age of earth is 4.5 X 109 years. What fraction of Uranium-238 that was present when Earth was formed still remains?
The half-lifes of Ur 238 are 4.5 bn years such as the age of the formation of the planet. The earth's formation is 4.5 billion years x 109 years.
The fraction of Ur 238 that was found n the earth still remains to be 1/2 that is 50%.Learn more about the 238 is 4.5 billion years and the age of the earth.
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Which sentence describes matter?
A. Matter is a force that acts on mass.
O B. Matter is emitted as a form of energy.
C. Matter is created from heat and light.
D. Matter occupies space and has mass.
Answer:
D.
Explanation: your welcome :)
Sentence that does describe matter
Matter occupies space and has mass.
What is matter?Matter is defined as the physical substance that occupies mass means can be weighed and space means volume.
Supporting answer
Matter is anything that occupies mass and space. It is very different from heat, light and energy. Matter can be weighed and its volume can be measured.
Therefore, Matter occupies space and has mass.
Hence, option D is correct.
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Lisa is using a calorimeter that contains 255 g of water at 19°C. She places 99 g of a liquid substance inside of the calorimeter and closes the lid. The substance undergoes a reaction and crystallizes. Lisa measures the new temperature of the water inside the calorimeter at 29.2°C. Recall that the specific heat of water is 4.18 J/g-°C. What is the enthalpy of fusion (ΔHf) of the substance? Show all steps of your calculations.
Based on the data provided, the enthalpy of fusion (ΔHf) of the substance is 109.82 J/g.
What is the enthalpy of fusion of a substance?The enthalpy of fusion of a substance is the amount of heat evolved or absorbed when the substance undergoes a phase change from liquid to solid or vice versa.
From the principle of conservation of energy, heat lost = heat gained.
Heat gained by water = heat lost by fluidHeat gained by water = mass × specific heat × temperature change.
Heat lost by liquid = mass × enthalpy of fusion of liquid
255 × 4.18 × (29.2 - 19) = 99 × ΔHf
ΔHf = 109.82 J/g
Therefore, the enthalpy of fusion (ΔHf) of the substance is 109.82 J/g.
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acid rain is created when chemicals in _____ react with ____.
A. Smog and water vapor
B. Fertilizers and water
C. Fertilizers and sunlight
D. Smog and sunlight
Answer:
A:smog and water vapor
Explanation:
Smog and water vapor
The answer is A: Smog . . . Water Vapor
If you were to repeat this experiment using an entire 16.5 g beer can and get the
same percent yield, what mass of alum would you expect? (I got .126% yield)
The mass of alum expected is mathematically given as
Ma= 365.904 g
Question Parameters:
Beer can mass (aluminium metal ) = 16.5 g
% yield = 126 % = 1.26
Generally, the equation for the Mass of alum is mathematically given as
M=Beer can mass * 1 g of alum produce
M= 16.5 x 17.6
M= 290.4 g
therefore, the Mass of alum expected
Ma= % yield x mass of alum
Ma= 1.26 x 290.4
Ma= 365.904 g
In conclusion, the mass of alum expected is
Ma= 365.904 g
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A proton in a linear accelerator has a de Broglie wavelength of 132 pm. What is the speed of the wavelength?
Answer:
The speed of wavelength is 3.0 ×10³ m/s.
Explanation:
Given data:
De Broglie wavelength = 132 pm (132×10⁻¹² m)
Speed of wavelength = ?
Solution:
Formula:
λ = h/mv
λ = wavelength
h = planck's constant
m = mass of proton
v = speed
now we will put the values in formula.
132×10⁻¹² m = 6.63 ×10⁻³⁴ j.s / 1.67 ×10⁻²⁷ kg × v
v = 6.63 ×10⁻³⁴ j.s / 1.67 ×10⁻²⁷ kg × 132×10⁻¹² m
j = kg m²/s²
v = 6.63 ×10⁻³⁴ kg m²/s / 1.67 ×10⁻²⁷ kg × 132×10⁻¹² m
v = 6.63 ×10⁻³⁴ kg m²/s / 220.44 ×10⁻³⁹ kg.m
v = 0.03×10⁵ m/s
v = 3.0 ×10³ m/s
The speed of wavelength is 3.0 ×10³ m/s.
A student decided to use the titration technique to find out the concentration of
Acetylsalicylic acid (ASA) from a sample that arrived at the laboratory. He
took three samples of 0.1830, 0.1903 and 0.1851 (grams) and titrated with NaOH
0.497 M and spent on the titration 16.0 – 18.3 and 17.3 ml respectively in each
sample. Calculate the percentage of acetylsalicylic acid in the samples. THE
Sample packaging says contain 92% AAS, calculate absolute and relative error
in this degree.
C8H7O2COOH(aq) + NaOH(aq) C8H7O2COONa(aq) + H2O(l)
From the mole ratio of the reaction, the mass of ASA reacted is greater than the mass of ASA sample indicating an error in some of the data provided.
What is the titration technique?Titration is a technique in analytical chemistry in which the volume of solution A of known concentration needed to react with another solution B of unknown concentration is used to determine the unknown concentration of the solution B.
The equation of the reaction between acetylsalicylic acid (ASA) and NaOH is given below:
C8H7O2COOH(aq) + NaOH(aq) C8H7O2COONa(aq) + H2O(l)1 mole of ASA reacts with one mole of NaOH
Molar mass of ASA = 180 g/mol
For first sample:
Volume of NaOH = 16.0 mL = 0.016 L
Moles of NaOH reacted = 0.016 × 0.497 = 0.007952 moles
Therefore, moles of ASA reacted = 0.007952 moles
Mass of ASA reacted = 1.43136 g
However, mass of ASA sample = 0.1830 g
The mass of ASA reacted is greater than the mass of ASA sample.
This means there is an error in the data provided.
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Molecular compounds result from covalent bonding which are called _______.
This is for high school physical science
Answer:
Diatomic Molecule
Explanation:
5. When 8.00 g of Pb(C2H3O2)2 * xH2O are heated, 1.14 g of H2O are driven off. Find the chemical formula and the name of the hydrate
Answer:
Please look in the paper ! <3
WHOEVER RESPONDS FIRST WILL GET MARKED BEST!
People's pinkie fingers can either be bent or straight. The allele for bent pinkie fingers is dominant (B). The allele for straight pinkie fingers is recessive (b). Match the genotype (in letters) to the correct genotype (in words). Some answer choices may not be used at all
look at the picture please.
Explanation: When the little finger bends in towards the palm and can't be straightened out, it is known as streblomicrodactyly, streblodactyly or camptodactyly.
Little fingers range from perfectly straight to bending inwards at a sharp angle. It is not clear whether fingers fall into two discrete categories or there is a continuous range of pinky angle. Hersh et al. (1953) said that bent little fingers bend inward at an angle of 15 to 30 degrees. They found that only 4 out of a sample of 4,304 people had what they considered to be bent little fingers
If only extremely bent little fingers are considered, then the bent little finger trait is too rare to be useful for illustrating basic genetics in classrooms. If fingers with a more moderate bend are counted, then there is no clear dividing line between bent and straight, plus no evidence that the trait is genetic. In either case, you should not use bent little finger to demonstrate basic genetics.
Bent Little Finger : A dominant allele results in the end joint of the little finger of each hand bending inward. Straight little fingers are a result of the recessive genotype.
Place your hands on a flat surface, palms down, and relax. Check to see if the first joints of your little fingers are bent or straight.
There you go
Hope that helps :)
PS the picture is too fuzzy to read
Examine the following reaction: 5FeCl2(aq) + KMnO4(aq) + 8HCl(aq) → 5FeCl3(aq) + MnCl2(aq) + KCl(aq) + 4H2O(l) Which element has undergone reduction?
The element which has undergone reduction is Manganese (Mn)
Redox reactionFrom the question, we are to determine which element has undergone reduction
First, we will define the terms oxidation and reduction
Oxidation
Oxidation can be defined as gain of oxygen. It can also be defined as an increase in oxidation state
Reduction
Reduction can be defined as loss of oxygen. It can also be defines as a decrease in oxidation state.
Now, we will determine the oxidation numbers of the elements both in the reactants and products sides
For FeThe oxidation state of Fe changed from +2 to +3. An increase in oxidation state indicates oxidation
For ClThe oxidation state of Cl did not change. It is -1 both in the reactants and products sides
For KThe oxidation state of K did not change. It is +1 both in the reactants and products sides
For MnThe oxidation state of Mn changed from +7 to +2. A decrease in oxidation state indicates reduction.
Hence, the element which has undergone reduction is Manganese (Mn).
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NOTE: The oxidation states of O and H (oxygen and hydrogen) did not change.
Stoichiometry: mole/ mole help
Answer:
0.531 moles of CO₂ are formed.
Explanation:
Given data:
Number of moles of CO = 0.531 mol
Number of moles of CO₂ formed = ?
Amount of oxygen = excess
Solution:
Chemical equation:
2CO + O₂ → 2CO₂
Now we will compare the moles of CO with CO₂.
CO : CO₂
2 : 2
0.531 : 0.531
Thus, 0.531 moles of CO₂ are formed.
A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components.
a. True
b. False
Answer:
true
Explanation:
It is because it appears uniformly in the eye
Is there a relationship between low-income neighborhoods and obesity? What do you think are some of the reasons?
Answer:
cheaper foods are usually more processed and unhealthy, therefore, poorer people are likelier to be obese.
Explanation:
1. The formula of a compound is M(OH)2. Given that the M, of the compound is 98, calculate the A, of M.
A. 64
B. 16
C. 32
D. 8
Answer: C
Explanation:
How do you know if the girl your dating is into the size or onto personality? 100 POINTS
Answer:
here
Explanation:
My guess is if she's into you for your size she's gonna want to have s## alot, but if she's into your personality she wants to hang out with you and compliments you this is my guess so sorry if this isnt good
What is the difference between the short and long carbon cycles?
Carbon is a versatile substance. As opposed to becoming sugars, carbon gets repurposed to become fossil fuels like coal.
What is carbon cycle ?
The carbon cycle is the ongoing process through which carbon atoms move back and forth between the atmosphere and the Earth. The amount of carbon in this closed environment our planet and its atmosphere does not alter because of this.
The carbon cycle describes how carbon moves among various carbon reservoirs or "carbon sinks" that are present on Earth. It is essential for preserving our planet's carbon balance and stable temperature.
The carbon cycle controls carbon naturally, which is essential for life on Earth. The Earth would be frozen without it.
Thus, the long-term carbon cycle puts carbon in motion. However, this cycle differs from the short-term carbon cycle in that it takes millions of years to complete its circuit
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what is the force needed to accelerate a sled with a mass of 2 kg at a rate of 3.0/s²
A. 6.0N
B. 3.0N
C. 1.5N
D. 3.0N
(help asap please I will give brainliest to the correct answer )
Answer:
The answer is option AExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
Force = mass × accelerationFrom the question
mass = 2 kg
acceleration = 3 m/s²
We have
Force = 2 × 3
We have the final answer as
6.0 NHope this helps you
You add 0.59 mL of n-propanol (0.803 g/mL, 60.1 g/mol) to an excess of acetic acid to create the pear ester propyl acetate (102.1 g/mol). If you obtain 0.54 grams of the product, what was your percent yield
The percentage yield of the reaction between n-propanol and excess of acetic acid is 67.5%
How to determine the mass of n-propanolVolume = 0.59 mL Density = 0.803 g/mLMass of n-propanol =?Mass = Density × Volume
Mass of n-propanol = 0.803 × 0.59
Mass of n-propanol = 0.47 g
Balanced equationSee attached photo
Molar mass of n-propanol = 60.1 g/mol
Mass of n-propanol from the balanced = 1 × 60.1 = 60.1 g
Molar mass of propyl acetate = 102.1 g/mol
Mass of proply acetate from the balanced equation = 1 × 102.1 = 102.1 g
SUMMARY
From the balanced equation,
60.1 g of n-propanol reacted to produce 102.1 g of propyl acetate
How to determine the theoretical yieldFrom the balanced equation,
60.1 g of n-propanol reacted to produce 102.1 g of propyl acetate
Therefore,
0.47 g of n-propanol will react to produce = (0.47 × 102.1) / 60.1 = 0.8 g of propyl acetate
How to determine the percentage yield Actual yield of propyl acetate = 0.54 gTheoretical yield of propyl acetate = 0.8 gPercentage yield =.?Percentage yield = (Actual / Theoretical) × 100
Percentage yield = (0.54 / 0.8) × 100
Percentage yield = 67.5%
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Malia was able to make a paperclip float on the surface of water. What will most likely happen to the paperclip if a drop of dishwashing detergent is added near it?
Soap is a surfactant that increases the intermolecular forces of water allowing the paperclip to continue to float.
Soap makes the water less viscous making the paperclip sink.
Soap is a surfactant that disrupts the intermolecular forces of water making the paperclip sink.
Soap makes the water more viscous allowing the paperclip to continue to float.
Answer: Soap is a surfactant that increases the intermolecular forces of water allowing the paperclip to continue to float.
Explanation: Answer A
Soap is a surfactant that increases the intermolecular forces of water allowing the paperclip to continue to float.
How does soap affect the intermolecular forces of water?A cleaning soap bubble has a polar give up and a nonpolar give up. Water is a polar molecule. The polar cease of the cleaning soap molecules are attracted to every other. The nonpolar ends of the soap molecules stand proud of the water and assist preserve bubbles collectively.
What happens while the soap is added to water?Adding cleaning soap lowers the water's surface anxiety so the drop turns weaker and breaks apart sooner. Making water molecules stick collectively less is what helps soaps easy dishes and garments greater without problems.
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Eddie experimented to find out which freezes at a lower temperature, distilled water or salt water. The steps he used in his experiment are shown below.
1Fill one beaker with 250 mL of room-temperature distilled water
2Fill another beaker with 250 mL of room-temperature salt water
3Measure the mass of the liquid in both beakers
4Place both beakers in a freezer
Observe the temperature at which the liquids freeze
Which of the steps in Eddie's experiment was NOT needed?
A.4
B.2
C.3
D.1
Answer:
the answer is C. 3. measure the mass of the liquid in both beakers
Answer:
C: 3
Explanation:
Which of the following helps protect species from extinction?
Question 4 options:
laws and policies
wildlife refuges
conservation efforts
all of the above
Answer:
all of the above :)
have a nice day !
Explanation:
What happens when there is a change in the DNA of a gene
Answer:
DNA is a dynamic and adaptable molecule. As such, the nucleotide sequences found within it are subject to change as the result of a phenomenon called mutation. Depending on how a particular mutation modifies an organism's genetic makeup, it can prove harmless, helpful, or even hurtful.
Explanation:
How is the motion of the water molecules effected by the temperature of the water?
Answer:
Temperature causes water molecules to move more quickly, because each individual molecule has more energy as it gets hotter. If you get water hot enough, the molecules move so much that the hydrogen bonds that hold them together start to break and the water becomes a gas.
Which of the following actions does the Commissioner of Insurance NOT have the power to conduct? O Activate insurance companies' financial reserves O Issue a cease-and-desist order Issue insurance licenses O Regulate the business of insurance in this state
The insurance commissioner does not have the right to activate insurance companies' financial reserves.
Functions of the commisioner for insuranceThe insurance commisioner is soely in charge of the control of the bussiness of insurance in the company and seeks to ensure that prudent insurance policies are implemented by the government.
However, the insurance commissioner does not have the right to activate insurance companies' financial reserves.
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what do i put in the columns?
Answer:
You are putting in the percent error is my guess.
Explanation:
When you were completing this chart what percentage of error was there?
No clue if this is correct!!
word equation into balanced formula equation carbon+oxygen=carbon dioxide
Explanation:
hope it helps, Godbless
Answer:
C + O = CO2
this is the correct answer
1. Given the image below, which calculation will NOT give you the correct average atomic mass?
A. (12+12+12+12+12+12+13+13+13+13)
10
B. (60⋅12)+(40⋅13)
C. (0.6⋅12)+(0.4⋅13)
D.
Answer: I think it’s either C or Dz
Explanation:
Due how it’s calculated.
The calculation that will not give the correct average atomic mass is (60⋅12)+(40⋅13).
The average atomic mass is obtained as the sum of the products of the relative abundance of each isotope multiplied by its mass.
There are 6 C-12 isotopes and 4 C-13 isotopes. This gives a total of 10 isotopes of both types.
All calculations of average atomic mass are correct except (60⋅12)+(40⋅13).
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which statements describe density? chech all that apply