Answer:
sunlight
Explanation:
it is the sunlight
Calculate the mass of nitric acid 63 gmole dissolved in 0.48 kg of water with the molarity of 1.2m
What is the pH of the solution if the molarity is 0.065M[H+]
The pH of a solution that has a hydrogen ion concentration [H+] of molarity 0.065M is 1.19.
How to calculate pH?The pH of a solution refers to the power of hydrogen in the solution i.e. the degree of acidity or alkalinity of the solution.
The pH of a solution with known concentration can be calculated using the following formula:
pH = - log [H+]
According to this question, a solution has a molarity of 0.065M. The pH is as follows:
pH = - log [0.065]
pH = 1.19
Therefore, the pH of a solution that has a hydrogen ion concentration [H+] of molarity 0.065M is 1.19.
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Compare natural selection to evolution. Be sure to justify your response in two or more complete sentences in the essay
box below.
Answer:
Natural selection is a process in which organisms are fit to adapt and live in the environment. Natural selection was an idea developed by Charles Darwin, Darwin contributed this idea when he was studying birds and tortoises at the Galapagos Islands. He then wrote his famous book, Origin of Species. Evolution is also very similar, evolution is a process in which organisms reproduce and mutate in order to survive and adapt. As you can see, natural selection and evolution are alike in many ways.
☆anvipatel77☆
•Expert•
Brainly Community Contributor
What is cholesterol and how does it affect our body?
Answer:
Cholesterol is a waxy substance found in your blood. Your body needs cholesterol to build healthy cells, but high levels of cholesterol can increase your risk of heart disease. With high cholesterol, you can develop fatty deposits in your blood vessels.
Explanation:
Answer:
Cholesterol is a waxy substance found in your blood. It can affect our bodies in many ways. If you have high levels of cholesterol it can increase your risk of heart disease. Your body needs it to help build healthy cells.
Explanation:
Hope this helps:)...if not then sorry for wasting your time and may God bless you:)
QUICK PLEASE!! 30 PTS! ONLY ANSWER IF YOU'RE SURE!
Describe how rate relationships and activation energy are important in chemical reactions.
Answer:
The higher the activation energy, the slower the chemical reaction will be.
Explanation:
your welcome
Answer:
The activation energy of a chemical reaction is closely related to its rate. Specifically, the higher the activation energy, the slower the chemical reaction will be. This is because molecules can only complete the reaction once they have reached the top of the activation energy barrier.
Explanation: Each and every chemical reaction require some amount of activation energy to begin. The activation energy enables the reactants to move and overcome forces of repulsion. The subsequent collisions between atoms facilitates the breaking of existing bonds and the formation of new ones.
The mechanical advantage of a screw can be increased by __________.
arranging the threads further apart
making it longer
arranging the threads closer together
turning it faster
The resistance and the effort force are used to calculate the mechanical advantage. Arranging the threads of the screw closer together will increase the mechanical advantage. Thus, option C is correct.
What is the mechanical advantage?Mechanical advantage is the ratio of the output force to the input force. It allows easier task performance by obeying the conservation of mass.
The closer threads of the screws make the distance covered to be more, and the force applied will be multiplied which will be a mechanical advantage over threads placed far apart.
Therefore, option C. threads located closer have more mechanical advantages.
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The fuel used to power the booster rockets on space shuttles is a mixture of aluminum metal and ammonium perchlorate. the following balanced equation represents the reaction.. 3al 3nh4clo4 → al2o3 alcl3 3no 6h2o how many moles of water are produced from 373 mol al?
The moles of water that are produced from 373 moles of ammonia present in any chemical reaction is 746 moles.
What is the stoichiometry?Stoichiometry of the reaction gives idea about the amount of entities present in any chemical reaction before and after the reaction.
Given chemical reaction is:
3Al + 3NH₄ClO₄ → Al₂O₃ + AlCl₃ + 3NO + 6H₂O
From the stoichiometry of the reaction it is clear that:
3 moles of Al = produces 6 moles of H₂O
373 moles of Al = produces 6/3×373 = 746 moles of H₂O
Hence required moles of water is 746 moles.
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What does the ozone layer protect the earth against?.
The National Wildlife Refuge supports _______ wildlife refuges. a. 150 b. 37 c. 550 d. 227
Answer:
C. 550
Explanation:
HGD
Answer:
C
Explanation:
Trust
2.3 moles of Helium gas are at a pressure of 1.70 atm, and the temperature is 41°C. What is the volume of the gas?
Answer:
35 L
Explanation:
To solve this problem we use the Ideal Gas Law equation: PV=nRT
We only have to convert one unit, which is celsius to Kilometers.
P=1.70 atm
V=X
n=2.3
R=.08206
T=41+273=314K
1.70(x)=2.3(.08206)(314)
1.70x=59.26
x=34.6L
Using 2 sig figs = 35L
what are the dangerous chemicals in the world of humans.
i believe this would be the answer
Arsenic trioxide.
Chlorine.
Hydrogen cyanide.
Nitrous oxide.
Phosgene.
Potassium cyanide (analytical reagent and purified)
Sodium arsenate (analytical reagent)
Sodium cyanide (analytical reagent)
Hope this helps! :)
Answer:
1) Sarin gas
2) Potassium cyanide
3) Botulinum toxin
4) Batrachotoxin
5) Dimethyl Cadmium
6) Fluoroantimonic Acid
7) Arsine
8) Ricin
9) Strychnine
10) Nicotine
Explanation: That's it mate.
hope it helps
Estimate how long it would take you to count
a dozen eggs. Now estimate how long it would take you to count the number of
atoms in a single egg. If you knew how many atoms were in a single egg, how
would you use that information to estimate the number of atoms in a dozen eggs?
seeing that we already know the number of a dozen eggs is 12, after finding out the numbers of atoms in one egg, we multiply by 12.
What is a Atom?Simply put, an Atom is the smallest unit of life, it should be noted that everything arround us is composed of an atom.
In summary, atoms are very small, they can only be seen using powerful microscope.
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What type of decay occurs during the fission of 240Pu?
P94240u→U92236+_____
Select one:
α
β+
β-
γ
Answer:
[tex] \: \boxed{ \sf \: Plutonium \: to \: Uranium \: is \: Alpha \: Decay! }[/tex]
Explanation:
Some nuclei attains more stabily by reducing their size, Alpha Decay is an example of such scenery.Nuclei having more than 210 nucleons, are so large in size hence the balancing force which prevents the repulsion between protons dominates, and due to excessive of protons lead to decay.
Consider any radioactive atom X with atomic mass A & atomic number z, when undergoes
alpha decay or radioactive emission, then the initial nucleus undergoes Excited state, and while returning to ground state it emits Gamma Radiation.
[tex]\boxed{\sf X_z^A \rightarrow Y_{z-2}^{A-4}+He_2^4+ \gamma }[/tex]
Given,
Parent nuclei X = Pu(A= 240, z=94)
Daughter nuclei Y = U(A= 236, z=92)
[tex]\sf Pu_z^A \rightarrow U_{z-2}^{A-4}+He_2^4 \\ \sf Pu_{94}^{240} \rightarrow U_{94 - 2}^{240 - 4}+He_2^4 \\ \sf Pu_{94}^{240} \rightarrow U_{92}^{236}+He_2^4 [/tex]
Hence the given fission of plutonium to uranium is Alpha Decay!
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Photochemical reaction are?
What is the concentration of a solution in
which 60 g of NaCl are dissolved in 1.0 L of water?
Answer:
6%
Explanation:
60 g / 1000 g = 6%
The concentration of a solution in 60 g of NaCl are dissolved in 1L of water will be 6%.
What is concentration?The abundance of an ingredient ratio of the volume of a combination is called concentration. Mass concentration, molar concentration, number concentration, and volume concentration are all examples of mathematical descriptions.
Concentration can be calculated as:
C=m/V.
where, C is concentration , m is mass and V is volume.
It is given that, m = 60 g and V = 1L or 1000 mL.
Now, put the value of given data in above equation.
C= 60/1000
=6%.
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Some greenhouse gases, such as fluorocarbons (CFCs, HFCs, PFCs, etc.), are human-made. Others, such as water, methane, and carbon dioxide, are naturally produced. Which type of greenhouse gas (human-made or natural) is more difficult to control and eliminate? Which types are easier? In three to five sentences, provide evidence for your argument.
Carbondixoide gas is the type of greenhouse gas which is more difficult to control and eliminate.
Which gas is difficult to remove and reduce?Carbon dioxide is the greenhouse gas that is emitted through human activities which can be controlled by reducing human activities which is impossible for us because large number of products are produced from which carbondioxide gas is released.
So we can conclude that carbondixoide gas is the type of greenhouse gas which is more difficult to control and eliminate.
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PLEASE! DUE IN 30 MINUTES! I NEED A LOT OF HELP! 50 POINTS! ANSWER ALL THREE QUESTIONS PLEASEEEEE I NEED HELP ASAP
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PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!! 50 POINTS!
SOMEONE PLEASE CLICK ON MY ACCOUNT AND ANSWER MY PREVIOUS QUESTIONS! THERE ARE 3! PLEASE HELP!!!!!!
HERE ARE THE QUESTIONS!
Olivia is a veterinary parasitologist who is studying a recent outbreak of giardia among beavers in a Colorado river. Since this is the first time she has seen beavers with this type of protozoa, Olivia is attempting to trace where they contracted it. After extensive testing, it is found that human sewage was leaking from a treatment plant nearby. This sewage contained the giardia protozoa, and the beavers picked it up in the nearby waters. Olivia now writes a research paper concerning this case in order to reclassify giardia. After her investigations, into what category is Olivia MOST likely hoping to place these protozoa in?
Group of answer choices
zoonoses
anthroponosis
ectoparasites
helminths
Although there is no denying that something killed a third of the population of Ancient Athens, there has been debate as to cause for many years. A historian who lived through it called it The Plague and so for many years, it was accepted to be Yersinia pestis, the same as the bacteria responsible for the Black Death. Recently, though, scientists have become convinced that the outbreak was actually due to typhoid. Given that this opinion of an event that occurred hundreds of years ago has only recently changed, what conclusion can be reached?
Group of answer choices
Historians understand the language of written records more clearly and have discovered that the symptoms match typhoid.
Scientists have been able to examine samples of human teeth found in the Athens area and isolated typhoid in the pulp.
A recent resurgence of typhoid in the Athens area leads scientists to believe that the climate is perfect for typhoid but not for Yersinia pestis.
There is no real reason for the change except that some scientists believe the plague is just a catch all.
As the Black Death spread up the Italian peninsula, into France, Germany, and further north, people alive in the 1300s felt that there was little they could do to protect themselves. What option might have been open to England and Scotland that the rest of Europe could not take advantage of?
England and Scotland are on an island so they could have closed their shores to ships.
England and Scotland had access to scientists who should have found a medicine.
England and Scotland have cold, wet environments that should have killed the bacteria.
England and Scotland had access to wool that could be used to create masks.
Answer:
Olivia-anthroponosis
Although-Ringworm is not life-threatening, whereas most others are.
Black Death-It was caused by bacteria instead of a virus.
Explanation:
A gas has a volume of 450.0 mL. If the temperature is held constant, what volume would the gas occupy if the pressure were a. doubled
Answer:
225.0mL
Explanation:
Volume and Pressure are inversely related. So if the pressure is doubled the volume will be half of its original volume.
Write a balanced chemical equation for the following reactions:
1) Calcium hydroxide+ Carbon dioxide → Calcium carbonate + water
How do you think plants would grow in space? Which tropism(s) would be affected and why?
Answer:
In the absence of gravity, plants use other environmental factors, such as light, to orient and guide growth. A bank of light emitting diodes (LEDs) above the plants produces a spectrum of light suited for the plants' growth.
The main purpose of cell division is
A.
to absorb nutrients.
B.
to remove cellular waste.
C.
to produce cellular energy.
D.
to produce more cells.
Any reaction that absorbs 150 kcal of energy can be classified as.
Answer:
The Answer should be Endothermic reaction
Explanation:
Reactions in which energy is absorbed are called Endothermic reactions.
A student built a model of DNA to show its helical structure in an attempt to display their knowledge of the chemical properties of the 3D structure. In fact, the teacher asked the entire class to create similar models. However, the teacher asks the students to incorporate a biological explanation for how each DNA molecule uniquely codes for different traits. Which component should be incorporated in the student models in order to meet the teacher's expectation for illustrating DNA's ability to code for unique traits? A) The DNA models should have different A:T, C:G ratios. B) The DNA models should have unique nucleotide sequences. C) The DNA models should have different angles of curvature for the helical strands. D) The DNA molecules should have alternating ribose and deoxyribose as the sugars in the backbone.
The DNA sequence determines the different traits, therefore, the student's DNA models should have unique nucleotide sequences.
What determines how each DNA molecule uniquely codes for different traits?The different traits which are produced from the DNA molecule is dependent on the sequence of nucleotides in the DNA molecule.
The unique sequence of nucleotides are known as genes.
Therefore, the student's DNA models should have unique nucleotide sequences.
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Answer:
B) The DNA models should have unique nucleotide sequences
Explanation:
This answer is the only one that makes sense as it is the reason how only four different types of nucleotide (adenine, thymine, guanine, and cytosine) could be arranged into many different types of sequences to create different types of species.
Use the picture below to answer the question. Comparing Wave A (blue) to Wave B (red), Wave B has a
Answer: B longer wave
Explanation:
because
How many liters in .250 ml?
Answer:
0.00025
Explanation:
Divide the volume by 1000
Relative to solids and liquids, how does air rank as a conductor of sound?.
At 15.17 atm and 243.41 K a certain gas has a volume of 641.68 L. What will the volume of gas be at 561.06 K and 70.3 atm?
Answer:
See below:Explanation:
P1V1/T1 = P2V2/T2
P1V1/T1 * T2 / P2 = V2
15.17 *641.68 / 243.41 * 561.06/70.3 = 319.17 Liters
Why does benzilic acid only precipitate in acidic solution.
what is the ionic compound name for NH4Cl
Answer:
Ammonium Chloride
Explanation:
The compound NH₄Cl is commonly known as Ammonium Chloride.
I hope this helps.
The ionic compound name for NH₄Cl is ammonium chloride.
The ionic compound formed by the combination of ammonium (NH₄⁺) cation and chloride (Cl⁻) anion is called ammonium chloride. The ammonium cation is formed by the combination of a positively charged nitrogen atom and four hydrogen atoms bonded together. The chloride anion is a negatively charged chlorine atom.
Ammonium chloride is commonly used in various applications such as in fertilizers, in the production of dry cell batteries, as a flux in metalworking, and as a cough suppressant in medicine. It has a distinctive salty taste and is sometimes used in food as a flavoring agent, particularly in licorice candies.
Hence, the name of NH₄Cl is ammonium chloride.
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HURRYY!!! WORTH 25pts. How many moles of a gas will be needed to fill a 42 liter container at 370 K and 9.16 atmospheres?
PV=nRT
R = 0.0821
Answer:
12.665 mols
Explanation:
You can just plug into the equation finding n, which is moles. The equation would be n = PV/RT. atm is 9.16, Volume is 42, 0.08206 or 0.0821 in this case is the constant, and T is the temperature which is 370 Kelvin.