Answer:
(5.00M)(X) = (0.120L)(0.470M)
X = (0.120)(0.470)/(5.00)
0.01128
Explanation:
12.1 M HNO3 would be needed to prepare 0.500 L of 0.500 M HNO3 stock solution is 0.01128 milliliters.
What is stock solution ?
The ideal way to define stock solutions is as concentrated solutions with precise, known concentrations that will be diluted for later laboratory usage. Even though you may decide against making stock solutions, doing so may help you run your business more efficiently and save you a ton of time and money.
where C1 x V1 = C2 x V2. Stock concentration, C1 ( beginning concentration ) V1 is the amount of stock needed to make the new solution. C2 is the concentration of a fresh or effective solution.
( 5.00M ) ( X ) = ( 0.120 liter ) ( 0.470 M )
Then, X = 0.120 × 0.470 ÷ 5.00
= 0.01128 milliliters.
Thus, 12.1 M HNO3 would be needed to prepare 0.500 L of 0.500 M HNO3 stock solution is 0.01128 milliliters.
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Can someone help me with this chemistry question?
Solid calcium hydroxide is dissolved in water until the pH of the solution is 11.44. The hydroxide ion concentration [OH–] of the solution is:______.A. 1.1 * 10-11 M.B. 3.06 M.C. 8.7 * 10-4 M.D. 1.0 * 10-14 M.E. None of these.
Answer:
c the answer is c that is the answer
Please hurry and help 20 and points and brainelest
Earth’s spheres interact in a system that makes up all of the matter, energy, and processes within Earth’s boundary. You learned about the different spheres in this lesson and how spheres are not isolated, but they interact. In the space below, explain how the biosphere relies on the other spheres for survival.
Answer:
Explanatthe tryposphereion:
If 5.3 g of gallium reactions with 5.3 g of oxygen according to the following reaction, how many grams of gallium oxide can be produced?
Word equation:
Formula equation:
(Must be balanced!)
Answer:
can you help mine please
How many molecules of chlorine are needed to react with 56.Og of iron to form Iron (III) chloride (FeCl3)?
Does anyone know what the answer to the question is?
Answer:
rate = (6.48 M-1 • s-1)[Cl2O5]2
Explanation:
How can you improve your ability to see the indicator color change at the endpoint of a titration?.
Answer: Place a piece of white paper under the analyte flask throughout the titration
Explanation:
The end point of titration can be made easy by the use of indicators. But we have to be keenly observe for each drop from the burette because, the colour change will be sudden for a drop.
What is titration?Titration is an analytical technique used to determine the unknown concentration using a standard reagent of known concentration. The standard reagent of known concentration is called titrant and the one to be determined is called analyte.
Usually analyte is taken in a conical flask and titrant in a burette. The end point of titration is the point at which the reaction is completed in perfect stoichiometry.
In acid-base titrations, the indicators used having different colors in different pH. Hence, the indicator in the analyte will change in color when the acidity of the medium changes. We have to observe keenly for the color change because it happens for any drop.
The adding of titrant from the burette must be dropwise and thus we can get a time to notice the sudden colour change of indicator.
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Help Please!
Fluorine - 19
Atomic number- 9
Atomic mass - 19
Answer:
Number of protons is 9
Number of electrons is 9
Number of neutrons is 10
Explanation:
Atomic number refers to the number of protons or electrons in an atom, so the electrons and protons are 9.
Atomic mass is the sum of the number of protons and neutrons.
Therefore, there are 10 neutrons in the atom's nucleus
the atomic number of RE is 75. the atomic mass of one of its isotopes is 186. how many neutrons are in an atom of this isotopes
Answer:
111
Explanation:
Answer:
I believe Rhenium has 111 neutrons in the atoms isotopes.
Explanation:
If I am calculating the volume in pv=nrt
Then, how do I know what units it is in coz normally it would be m3 but how do I know that it's not dm3
Explanation:
If you use the SI units for P, n, R and T ( In Pa, mol, JK-1mol-1 and K respectively) you'll end up with a Volume with m3 units. So if you have others in different units first convert them into the units I mentioned above and you will definitely get the answer in m3.
Here’s the second part to my science
Answer:
"powerhouse"- mitochondria
"stores spare parts"- vacuole
"surrounds the nucleus"- nuclear membrane
"controls the cell"- nucleus
"pathways"- endoplasmic reticulum
"inner layer"- cell membrane
"outer plant covering"- cell wall
"fills up the cell"- ctyoplasm
"collects light"- chloroplasts
"packages proteins"- golgi
"holds info"-chromosomes
"makes protein"-ribosomes
please mark me brainliest if you like my answer <3
7. What is the name of the compound AICO3?
Answer:
Calcium carbonate
Explanation:
Hope this helps :)
Have an amazing day <3
(ill give brainliest)
Use this picture to explain that an electrically charged object can attract an uncharged object without any contact. Your answer should be at least three sentences long.
Answer:
It is because the object that is charged attracts the uncharged because it is giving electrons and passing it on to the object. As shown in the image the balloon is attracting the paper that is not charged. Actually telling,the charged object will cause the uncharged object to become charged, with a positive charge on one side and a negative charge on the other side. This process is called induction.
Explanation: Pls Mark Brainliest
Answer:
Positive and negative charges
Explanation:
When we put a charged object near an uncharged object, it produces opposite charges in the near end of the uncharged object by electric induction. In the figure, we can see that the ballon has charges which produces opposite charges in the paper which is uncharged.
The burning of fossil fuels contributes to the addition of greenhouse gases to the atmosphere. These gases trap thermal energy in the Earth’s atmosphere. Which of the following would be the most reasonable changes that could result from an increase in the burning of fossil fuels?
Explanation:
The burning of fossil fuels contributes to the addition of greenhouse gases to the atmosphere. These gases trap thermal energy in the Earth's atmosphere.
The materials which contain hydrocarbons which are generated from the remains of decay of plants and animals that are buried underground for many years are called fossil fuels.
What causes by burning fossil fuels?The burning of fossil fuels can affect the environment, climatic conditions and human health. The burning of fossil fuels produces large amount of green house gases like CO₂, CH₄, etc. The increase in the amount of green house gases increases the heat and temperature of the earth's surface which leads to global warming.
The increase of temperature due to global warming can cause rise in the sea level, the glaciers of the earth will melt and coastal areas will be submerged under water due to this.
The burning of fossil fuels also releases toxic gases like SO₂, NO₂ which can cause acid rain and the emission these gases causes air pollution.
Thus the burning of fossil fuels has adverse effects.
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What is the chemical name of NaCl₂
Answer:
It’s sodium chloride
Explanation:
Hope that helps
how does the ribosome know the sequence of amino acids
Answer:
The ribosome contains three grooves which are sites for the tRNA. The first codon is AUG, which is called a "start codon". ... So, the tRNA that has the anti-codon sequence of UAC carrying the amino acid Met bonds to the mRNA codon. Another tRNA bonds to the next codon in the next groove with the next amino acid
The dissolved materials in seawater are thought to originate from chemical weathering of rocks on the continents and also from ________.
Answer:
outgassing of elements from earth's interior
Batteries allow us to store energy for when it’s needed, such as starting a car engine or jump-starting another car whose battery has lost its charge. But batteries cannot operate without chemical reactions. What kind of energy do you think is stored in the substances within the battery?
Answer:
Chemical energy
Explanation:
I hope this helped you!
Batteries store the energy in the form of chemical energy that chemical energy is converted into electrical energy. Chemical energy is used to stored in the substances within battery.
What is electrochemical energy ?The conversion of chemical energy into electrical energy or vice versa is called as electrochemical energy . This includes reactions transferring electrons, redox reactions .
Redox reaction in which reduction and oxidation takes place simultaneously. Reduction, when a substance receives one electron. Oxidation when a substance gives away one electron.
A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material (electrode) to another, through an external circuit.
Thus, chemical energy is used to store in the substance within battery.
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What three factors describe the
movement of surface water in streams and
rivers?
Three factors that describe the movement of surface water in streams and rivers are the river's gradient, flow, and stream load.
I hope this helps!
What is the major product formed when the alcohol is treated with hcl?.
Answer: Alcohol undergoes nucleophilic substitution when reacted with hydrohalic acids (HX) such as HCl.
Explanation:
What has more atoms, a mole of carbon or a mole of fluorine?
A mole of carbon
A mole of Florine
They have the same number of atoms
Answer:
They have the same number of atoms
Explanation:
The mole (symbol: mol) is the base unit of amount of substance.
Think of mole meaning like inch. An inch of grass is the same as an inch of a flower. Mole is the standard measuring unit of atoms.
What is the correct definition of Earth's energy budget?
it's a balance between that reaches the earth and the sun.
Can I have brainlist please
How do plants slow down erosion?
They slow down water as it runs downhill.
They speed up water as it runs downhill.
Their roots crack open rocks.
Their roots create new rock.
Answer:
I'm thinking the answer is gonna be it slows it down as it runs down hill
doy CORONITA a quien me ayude rapido que es un examen porfaaa
Answer:
thank you for the points
help me please the subject is siecnce
Answer:
okay your question in science
Is the gin world scary?
Answer:
Gin= Machine that picks cotton
Explanation:
This Machine was used in the early 1940s to help pick cotton to make things.
In an experiment trying to dissolve sugar in water, a person boils water in a pot on the stove and then puts the water and the sugar in a cup. That person times how long it takes to dissolve the sugar.
According to the concept of solubility, boiling water and then adding sugar to it will take longer time to dissolve than adding water and sugar together to boil as thermal energy requires to dissolve sugar will be less.
What is solubility?Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.
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tornadoes form when updrafts from thunderstorms begin to _____
First answer that is correct gets brainly
Tornadoes form when updrafts from thunderstorms begin to interact with strong wind shear and develop a rotating column of air.
Updrafts are powerful vertical currents of air that occur within thunderstorms, caused by the rapid heating of the Earth's surface and the subsequent convective process. These updrafts carry warm, moist air upward, creating a conducive environment for the formation of severe weather phenomena.
When the updrafts encounter wind shear, which is the change in wind speed and direction with height, it can lead to the development of horizontal vorticity. Wind shear creates a rotating motion within the storm, where air at different heights starts to rotate at different speeds, generating a horizontal spin.
As the updraft continues to intensify, it tilts the rotating column of air from horizontal to vertical, forming a mesocyclone. The mesocyclone is a critical component in tornado formation. It acts as a localized area of strong rotation within the storm, extending from the cloud base to the mid-levels of the atmosphere.
Under specific conditions, such as the presence of a strong updraft, a well-developed mesocyclone, and further enhancement from other atmospheric factors, the mesocyclone can contract and intensify into a tornado. The process is complex and influenced by various meteorological factors, but the interaction between updrafts, wind shear, and the development of rotation plays a fundamental role in tornado formation.
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measuring the isotopic composition of atmospheric co2 shows that the burning of fossil fuels has led to _____ co2 levels over the last 200 years.
Answer:
measuring the isotopic composition of atmospheric co2 shows that the burning of fossil fuels has led to the co2 levels over the last 200 years.
Explanation:
pa brainliest po ty
If an iron nail was placed in the copper sulfate solution, would you see a
change?
Explain your answer.
Answer:
Iron displaces copper ions
Explanation:
which means that iron in more reactive than copper.
(Fe2+) and cupric ion (Cu2 +) is converted into metallic copper. Fe (s) + Cu2 + (aq) —→ Fe2+ (aq) + Cu (s).