Answer:
Its (b)
Explanation:
After studying abroad in boston, I have discovered everything that there is to know about chemistry, and I have come to the conclusion that B is the correct answer.
[tex]CICH_2C=CCH_2CH(CI)_2[/tex] the correct structure that corresponds 1,5,5-trichloro-2-pentyne. Hence, option B is correct.
What is pentyne?The parent name of the alkyne comes from the IUPAC name for the alkane of the same number of carbon atoms, except the ‐ ane ending is changed to ‐ yne to signify the presence of a triple bond.
[tex]CICH_2C=CCH_2CH(CI)_2[/tex] the correct structure that corresponds 1,5,5-trichloro-2-pentyne.
Hence, option B is correct.
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2.28 Global Warming’s Negative Effects Worksheet
Watch this Video and to answer the following questions.
What type of human activity increases the amount of CO2 in the atmosphere?
Explain how climate change affects our oceans
Explain how climate change affects our weather
Explain how climate change affects our food
Explain how climate change affects our health
What can we do to prevent the negative effects of climate change?
PLEASE ANSWER ASAP GIVE BRAINLIEST
Mark drove 14 miles EAST and then 23 miles WEST. His displacement from where he started would be
Answer:
9 miles west
Explanation:
hope this helps
What is caffeine atomic number?
No links
Answer:
Caffeine has no atomic number
Explanation:
Caffeine is a compound, not an element. Therefore it cannot have an atomic number.
what does molecule mean?
a.) A pure substance, only one type of atom
b.) Two or more atoms held together by chemical bonds
c.)Composed of two or more separate elements
d.)The smallest part of matter still retaining chemical properties
A pure substance, only one type of atom
Answer:
(a) a pure substance, only one type of atom
What is the number of moles of Sodium Chloride (NaCl) that is present in 29.22g sample of it?
Answer:
[tex]\boxed {\boxed {\sf 0.5000 \ mol \ NaCl}}[/tex]
Explanation:
We are asked to convert grams to moles. We must use the molar mass or the grams in 1 mole of a substance. These values are found on the Periodic Table as the atomic mass, but the units are grams per mole (g/mol) instead of atomic mass units (amu).
We are given the compound sodium chloride or NaCl. Look up the molar masses of the individual elements.
Na: 22.9897693 g/mol Cl: 35.45 g/molThe formula for the compound does not contain any subscripts, so there is 1 mole of each element in 1 mole of the compound. Add the molar masses together to find sodium chloride's molar mass.
NaCl: 22.9897693 + 35.45= 58.4397693 g/molNow we can use the molar mass to create a ratio. We know there are 58.4397693 grams of NaCl in 1 mole of NaCl.
[tex]\frac {58.4397693 \ g \ NaCl}{ 1 \ mol \ NaCl}[/tex]
Multiply by the number of grams provided in the problem: 29.22
[tex]29.22 \ g\ NaCl*\frac {58.4397693 \ g \ NaCl}{ 1 \ mol \ NaCl}[/tex]
Flip the ratio so the units of grams of NaCl cancel.
[tex]29.22 \ g\ NaCl*\frac { 1 \ mol \ NaCl}{58.4397693 \ g \ NaCl}[/tex]
[tex]29.22*\frac { 1 \ mol \ NaCl}{58.4397693}[/tex]
[tex]\frac {29.22}{58.4397693} \ mol \ NaCl[/tex]
[tex]0.5000019738 \ mol \ NaCl[/tex]
The original measurement of grams has 4 significant figures, so our answer must have the same. For our answer, that is the ten-thousandth place. The 0 to the right of this place (0.5000019738) tells us to leave the 0 in the ten-thousandth place.
[tex]0.5000 \ mol \ NaCl[/tex]
There are approximately 0.5000 moles of sodium chloride in a 29.22 gram sample of sodium chloride.
What is a synthesis reaction? a reaction that occurs when two or more reactants combine into one product
a reaction that occurs when one element within a compound is exchanged with another element
a reaction that occurs when a substance combines with molecular oxygen, releasing light and energy
a reaction that occurs when a single substance breaks apart and forms two or more new substances
Answer:
A synthesis reaction is a reaction that occurs when two or more reactants combine into one product.
Explanation:
A reaction that occurs when two or more reactants combine into one product is called a synthesis reaction.
A reaction that occurs when one element within a compound is exchanged with another element is called a single replacement reaction.
A reaction that occurs when a substance combines with molecular oxygen, releasing light and energy is called combustion.
A reaction that occurs when a single substance breaks apart and forms two or more new substances is called decomposition.
What is the name of this hydrocarbon?
Answer:
2,3-dimetylpentane
Explanation:
.....................
If the half-life of a decaying isotope is 10 years, which statement is true after
20 years?
Answer:
A. There are more daughter nuclei than parent nuclei in a sample.
Explanation:
There are more daughter nuclei than parent nuclei in a sample. Hence, option A is correct.
What is half-life?The half-life of a radioactive element or isotope is the time taken for half of the substance to decay.
If the half-life of a decaying isotope is 10 years, after 8 years, less than the total mass of the original isotope will decay since 8 years is less than 10 years.
Therefore, we can conclude that, if the half-life of a decaying isotope is 10 years, after 8 years, there will be more parent nuclei than daughter nuclei in a sample.
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To objects (A and B) of the same temperature are in contact with each other? Which statement is true.
A. Heat transfers from object A to object B, because molecules from a collide with those from B.
B. No heat transfers because there are no collisions between the molecules of the objects
C. Heat transfers from object B to object A, because molecules from B collide with those from A
D. Although the molecules collide, no heat transfers because there is no temperature difference between the objects
Consider the statement:
“The following report presents the results of our laboratory tests, which support the conclusion that our new treatment for acne is safe and effective with minimal possible side effects.”
What questions should a person ask themselves to determine if this scientific study is reliable?
What does the acne medicine look like?
What does the acne medicine smell like?
Were laboratory tests conducted by the same company that produces the acne medicine?
Were laboratory tests conducted in a laboratory with more than 100 employees?
The question the person should ask him/herself to probably check for authenticity of the drugs is "Were laboratory tests conducted by the same company that produces the ac[tex]\cap[/tex]e medicine?". Option C. This is further explained below.
What is a scientific study?Generally, scientific study is simply defined as a method that includes making conjectures and deriving answers as logical implications from the hypotheses.
In conclusion, Were laboratory tests conducted by the same company that produces the ac[tex]\cap[/tex]e medicine should be questioned as medical companies should look to other labs for authenticity confirmation.
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Help please At which boundary type would mountains, such as the Himalayans, most likely form?
Question 6 options:
Divergent
Convergent
Transform
Slip Fault
Answer:
convergent is the answer
A rarefraction is generated when particles move
A:together
B.closer
C.under
D.apart
What is represented by the dashed blue line and the solid black line in the image below? motion,vectors,scalars,distance,displacement
Answer:
Distance
Explanation:
There as you see the lines are in a following of a path, like marathon. IT also states above each structure. Start and finish, why would it show motion. It shows distance.
What happens during a lunar eclipse?
A
Earth passes between the sun and the moon.
B
The moon passes between the sun and Earth.
C
The sun passes between Earth and the moon.
D
Earth, the sun, and the moon are at right angles in space.
Answer:
A.EARTH PASSES BETWEEN THE SUN AND THE MOONExplanation:
When Earth passes directly between Sun and Moon, its shadow creates a lunar eclipse.
pabrainliest po plss:)
Charlse Darwin introduced the theory of naturalselection as the mechanism for evolution true or false?
Calculate the number of moles found in 3.045x1024 atoms of helium.
PLS HELP
Explanation:
so for this u have to use this equation where
Moles = number of particle/6.02×10^23
= 3.045 × 10^24/6.02×10^23
= 5.0581
write it to 3 S.F so 5.06 moles
What are some of the issues facing the ocean ( give at least 3 )
Answer:
Pollution
Overpopulation
Destruction of habitats
Explanation:
the 3 factors that affect the process of Natural Selection
Answer:
Overproduction of Offspring. The first of these factors that must be present in order for Natural Selection to occur is the ability of a population to overproduce offspring.
Variation.
Selection.
Reproduction of Adaptations.
Explanation:
Answer the following questions using the chemical equation below:
6CO2 + 6H2O => C6H12O6 + 6O2
3. How many total atoms are on the product side?
4. How many molecules of water are on the reactant side?
C
ot 헤
C.
Show that the results of these dulys
Calculate the oxidation state of Manganese in the following
i. KMnO4 ii. Mno4-
i) KMnO4
lets calculate using x method
1+x+ 4(-2) = 0
1+x-8 =0
x= 7
ii)MnO4‐
x+4(-2) = -1
x-8 = -1
x = 7
Which species is the reducing agent in a redox reaction? Chem is hard
Answer:
The species that furnishes the electrons is called the reducing agent. In this case, the reducing agent is zinc metal.Explanation:
Hopes this helps. Mark as brainlest plz!In a redox reaction, the species which is oxidized acts as the reducing agent.
In a redox reaction, The substance losing electrons is the reducing agent and is being oxidised. The substance that gains electrons is the oxidising agent and is being reduced.
An oxidising agent isdefined as a substance that causes oxidation by accepting electrons and thus becoming reduced.
A reducing agent is defined as a substance that reduces by losing electrons and thus becomes oxidised.
Substances that have the ability to oxidise other substances are referred to as oxidising agents or oxidants
Substances that have the ability to reduce other substances are referred to as reducing agents or reductants.
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The question should be
Which species is the reducing agent in a redox reaction?
1.Peptide bond formation is accomplished as the amine nitrogen of the an-tRNA in the ____ carries out a _____ of the amino acid bound to the _____. a.A site, nucleophilic attack on the carbonyl carbon, tRNA of the P site b.P site, nucleophilic attack on the carbonyl carbon, tRNA of the A site c.A site, acidophilic attack on the carbonyl carbon, tRNA of the P site d.A site, electrophilic attack on the carbonyl carbon, tRNA of the P site e.P site, electrophilic attack on the carbonyl carbon, tRNA of the A site
Answer:
A
Explanation:
A site, nucleophilic attack on the carbonyl carbon, tRNA of the P site
The growth of the plants that the animal used for food could not keep up with the needs of the population. There was so little food for the animals, the population declined. How does this relate to overpopulation?
Question options:
This does not relate to overpopulation.
Overpopulation means that there are too many members in the population and that in the end, this will severely hurt their chances for survival.
Overpopulation means that there are too many members in the population and that in the end, this will increase their chances for survival.
Overpopulation means that there are few members in the population and that in the end, this will increase their chances for survival.
Answer:
The number of animals greatly exceeded the carrying capacity, destroying the food sources and causing the population to decline.
ALSO
Overpopulation means that there are too many members in the population and that in the end, this will severely hurt their chances for survival.
Explanation:
The statement relates to overpopulation as overpopulation means that there are too many members in the population and that in the end, this will severely hurt their chances for survival.
What is overpopulation?Overpopulation means an increase in the number of a specific population in a specific place.
Overpopulated species harm other species. It competes for the food and place.
It also decreases the number of species that are its prey.
Thus, the correct option is B.
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Which of the following has the most energy?
heat
ultraviolet rays
the color blue
radio waves
Answer:
C
Explanation:
Should American drugmakers have to limit acetaminophen pills sold over-the-counter?
Answer: The agency requires all prescription drugs containing acetaminophen to carry a black box warning that an overdose can result in liver transplant or death. For over-the-counter Tylenol and its generic equivalents, the FDA requires no warning that overdose can be fatal.
Explanation:
^^^^
A 45.2 g sample of Silver at 101.0 ºC is dropped into 300.0 g of water at 30.6 ºC. What is the final temperature of the water?
Answer:
Final temperature of water = 31.2° C
Explanation:
Let the final temperature of water be T degrees
Concept: By energy conservation law
Heat lost by the silver = heat gained by water
Heat lost be silver Q1 = m1c1ΔT1
Q1 = 45.2/1000Kg×2.36J/KgK×(101-T)
Heat gained by water Q2 = m2c2ΔT2
Q2 = 300/1000Kg×4.186J/KgK(T-30.6)
Since, Q1=Q2
⇒ 45.2/1000Kg×2.36J/KgK×(101-T) = 300/1000Kg×4.186J/KgK(T-30.6)
Solving we get T = 31.2° C
Therefore, final temperature of water = 31.2° C
7. Which type of electromagnetic radiation can be dangerous to living things?
a. Radio waves
b. Visible light
c. Gamma rays
Why do clouds appear and disappear?
Answer: Clouds are composed of liquid suspended water droplets in about a 100% RH environment. The three primary ways that clouds dissipate is by (1) the temperature increasing, (2) the cloud mixing with drier air, or (3) the air sinking within the cloud. Many things can increase the temperature of the cloud, like the sun, or warm air radiating off of the ground. That's why low fog and clouds tend to disappear as it warms up during the day. ... The air within the cloud descends - When the air descends, it warms.
Explanation:
10 points! Please help if you know the answer I need to get 100% on this test :)
Answer:
Metal has an high capacity, which allows it to heat up faster and transfer the heat to the contents of the pot or pan.
Explanation:
Because metal pots are made from a narrow range of metals because pots and pans need to conduct heat well.
What is the best explanation for the fact that Styrofoam will not dissolve in water, but Styrofoam will dissolve in acetone?
1.styrofoam is polar and water is nonpolar
2.styrofoam is nonpolar and water is polar
3.Styrofoam is polar and water is polar
4.styrofoam is nonpolar and water is nonpolar