[tex]\huge{\green}\fcolorbox{blue}{cyan}{\bf{\underline{\red{\color{red}Answer}}}} [/tex]
It is the embryonic root inside the seed. It is the first thing to emerge from a seed and down into the ground to allow the seed to suck up water and send out its leaves so that it can start photosynthesizing. The radicle emerges from a seed through the micropyle.16. How many moles of aluminum are needed to react completely with 1.2 mol of FeO?l
2 Al (s) + 3 FeO (s) → 3 Fe (s) + Al₂O, (s)
a. 1.2 mol
0.8 mol
c. 1.6 mol
d. 2.4 mol
Niels Bohr adapted the nuclear model.
Describe the change that Bohr made to the nuclear model.
Answer:
To remedy the stability problem, Bohr modified the Rutherford model by requiring that the electrons move in orbits of fixed size and energy.
When the temperature and number of particles of a gas are constant, which of the following is also constant?
a. the product of the pressure and volume
b. the sum of the pressure and volume
c. the ratio of the pressure and volume
d. the difference of the pressure and volume
Solid potassium fluorine gas → solid potassium fluoride balanced
The balanced symbol equation for Solid potassium fluorine gas → solid potassium fluoride is 2 K + F₂ → 2 KF ⁻.
What is a balanced equation?The reactants are on the left side of the arrow in a balanced equation, while the products are on the right.
The moles in a compound are indicated by the number in front of the chemical formula. Subscripts indicate the number of atoms in a single molecule (numbers below an atom).
Thus, the balanced equation is 2 K + F₂ → 2 KF ⁻.
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Name these compounds according to IUPAC. (ASAPP)
The IUPAC name of the compound is propanal and acetone.
What is propanal and acetones?Propanal is also called propanaldehyde, and it is an aldehyde which has one double bond and oxygen.
Acetone is a ketone. Ketones have functional group of R2CO.
Thus, the IUPAC name of the compound is propanal and acetone.
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If 70 grams of nitrogen gas will dissolve in a liter of solution at 1 atm of external
pressure. If the pressure is increased to 3 atmospheres, what would the solubility be?
Answer: Empirical formula, CH; Molecular formula, C2H2
Explanation:
7)What mass of hydrogen gas is produced when 8.56grams of lithium reacts with water to also produce lithium
hydroxide?
2Li + 2H20 - H2 + 2LIOH
i guess this is the answer .
Calculate the mass of ammonium sulfide (nh4)2s in 3.00 l of a 0.0200 m solution. g (nh4)2s
Taking into account the definition of molarity, 4.08 grams of ammonium sulfide are present in 3.00 L of a 0.0200 M solution.
Definition of molarityMolar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
[tex]Molarity=\frac{number of moles}{volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].
Mass of ammonium sulfideIn this case, you know:
Molarity: 0.0200 Mnumber of moles: ?volume: 3 LReplacing in the definition of molarity:
[tex]0.0200 \frac{moles}{liter}=\frac{number of moles}{3 L}[/tex]
Solving:
0.0200 [tex]\frac{moles}{liter}[/tex]× 3 L= number of moles
0.06 moles= number of moles
On the other side, the molar mass is the amount of mass that a substance contains in one mole. In this case, the molar mass of ammonium sulfide is 68 g/mole.
Then, the amount of mass contained in 0.06 moles is calculated as:
0.06 moles×[tex]\frac{68 grams}{1 mole}[/tex]= 4.08 grams
Finally, 4.08 grams of ammonium sulfide are present in 3.00 L of a 0.0200 M solution.
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Answer:
4.09 is the correct answer.
_7 A teacher has a bottle of 12.0 M hydrochloric acid. She wants to make 2.0 L of 3.0 M HCl for her chemistry classes. How much of the 12.0 M HCI will she need to use?
А. 0.5 L
B 2L
C 20 L
D 50 L
Show your work in this box. No work, no credit.
Answer:
C 20 L
Explanation:
Apply the formula C1 × V1 = C2 × V2 where, C1 = initial concentration , 12M V1 = initial Volume , ? C2 = Final concentration,0.25M V2 = Final Volume , 1.0L V1 = C2 x V2
Please help
Calculate the molarity of an HCl solution if 41.73 mL of HCl reacts with 7.8111 grams of sodium carbonate (106 g/mol) according to
2 HCl + Na2CO3 → 2 NaCl + H2O + CO2
Answer in units of mol/L.
The molarity of an HCl solution if 41.73 mL of HCl reacts with 7.8111 grams of sodium carbonate is 1.77M. Details about molarity can be found below.
How to calculate molarity?The molarity of a solution can be calculated by dividing the number of moles of the substance by its volume.
According to this question, 7.8111 grams of sodium carbonate (106 g/mol) is given. The number of moles of sodium carbonate is calculated as follows:
no of moles = 7.811g ÷ 106g/mol = 0.074mol
Molarity of HCl = 0.074mol ÷ 0.04173L
Molarity of HCl = 1.77M
Therefore, the molarity of an HCl solution if 41.73 mL of HCl reacts with 7.8111 grams of sodium carbonate is 1.77M.
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How many formula units of silver fluoride, AgF, are equal to 42.15 g of this substance?
Hurry please.
2.05 × 10²³ formula units
Given data:Mass of AgF = 43.15 gNumber of formula units = ?Solution:Number of moles of AgF:Number of moles = mass/ molar massNumber of moles = 43.15 g/ 126.87 g/molNumber of moles = 0.34 molNow Number of formula units will be determine by using Avogadro number.It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.The number 6.022 × 10²³ is called Avogadro number1 mole = 6.022 × 10²³ formula units0.34 mol × 6.022 × 10²³ formula units2.05 × 10²³ formula units
Plsss helpssssssssSSS
Which periodic trend quantifies the amount of energy required to remove an electron from a neutral, gaseous atom?.
Ionization energy refers to the amount of energy needed to remove an electron from an atom. Ionization energy decreases as we go down a group. Ionization energy increases from left to right across the periodic table.
What is ionization energy?
Ionization is the process by which ions are formed by the gain or loss of an electron from an atom or molecule.
Ionization energy is defined as the energy required to remove the most loosely bound electron from a neutral gaseous atom.
When we move across a period from left to right then there occurs a decrease in atomic size of the atoms. Therefore, ionization energy increases along a period but decreases along a group.
Smaller is the size of an atom more will be the force of attraction between its protons and electrons. Hence, more amount of energy is required to remove an electron.
Thus, we can conclude that the energy required to remove an electron from a gaseous atom is called ionization energy.
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SO2+02➡SO3
balance chemical equation
Answer:
2S02 + O2 ---> 2SO3
Its balanced now as Reactants = Products.
Which of the following is an example of a chemical change taking place?
Answer:
Burning, cooking, rusting, and rotting
Why did the Marshall Plan include aid for the defeated Axis powers?
Question
Answer:
One of the purposes of the Marshall Plan was to aid nations in economic recovery from WWII.
Explanation:
The Marshall Plan aided the defeated Axis powers because that's one of the reasons it was created, The Marshall Plan was supposed to rehabilitate the economies of the 17 western and southern European countries in order to create stable conditions for democracy to continue.
You are the IT consultant to a petro-chemical company. The company has ten servers and 250 workstations located in San Francisco and New Orleans. They are currently using tape cartridge backup on a nightly basis. What is the obvious flaw in this solution
One of the flaws of this solution is that because it is programmed at night data loss is possible if a failure occurs at this time.
Why is tape cardrigde backup used?This is used to save important information or date from a device such as a computer periodically.
What are the advantages of this solution?Tape cardridge backup is the best option if a lot of data has to be saved because they are efficient and low cost.
What is one possible flaw?The only problem is that because the back up is automatically programmed at night, a failure such as a problem in electricity implies valuable data might be lost.
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how is energy involved in phase changes ?
Answer: It is either through the addition of energy by heat and the transition to a more energetic state or from the removal of energy by heat and the transition to a less energetic state.
Explanation:
Answer:
During phase changes, matter changes from one phase to another one, either through the addition of energy by heat or transmission or the removal of energy with the same process.
Explanation:
What are the ways that energy
conversion can occur?
Answer:
Energy can exist in many forms within a system and may be converted from one form to another within the constraint of the conservation law. These different forms include gravitational, kinetic, thermal, elastic, electrical, chemical, radiant, nuclear, and mass energy.
Explanation:
What does global warming have to do with severe weather like storms heat waves droughts and hurricanes
Answer:
A rise in global temperatures increases the severity and likelihood of storms, floods,wildfires, droughts, and heat waves
Explanation:
no explanation please tag me as brainleast thankyou
Why is knowing density important to us? Give a reasonable answer please don’t copy what the internet has I already tried doing that I can’t
Consider the following reaction. Zn(s) 2agno3(aq) --> 2ag(s) zn(no3)2(aq)when 16. 2 g of silver was produced, _____ mole(s) of silver nitrate would be required
The required amount of silver nitrate to produce 16.2g of silver is 25.48 grams.
What is the relation between mass & moles?Relation between the mass and moles of any substance will be represented as:
n = W/M, where
W = given massM = molar massMoles of silver = 16.2g / 107.8g/mol = 0.15mol
From the stoichiometry of the given reaction it is clear that, same moles of silver nitrate is required to produce same moles of silver. So 0.15 moles of silver nitrate is required.
Mass of silver nitrate = (0.15mol)(169.87g/mol) = 25.48g
Hence required mass of silver nitrate is 25.48g.
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CHEMISTRY PLS HELPPP
Which of the following molecules is optically active?
A. 3,3-dichloropent-1-ene
B. Butan-1-ol
C. 2-methylbutane
D. 2-bromopropanoic acid
Answer:
D
Explanation:
2-bromopropanoic acid is optically active because it contains chiral carbon bonded with 4 different atom ( CH3,H,COOH,Br).
The diagram shows three steps in the carbon cycle.
The Carbon Cycle
Which two phrases best summarize the events taking place in Step 2?
A. Cellular respiration
B. Storing carbon dioxide in living organisms
C. Photosynthesis
D. Releasing carbon dioxide into the atmosphere
According to the diagram, cellular respiration and photosynthesis are the phrases that best summarize the events taking place in Step 2.
What is the Carbon Cycle?It is the way carbon circulates through the atmosphere, the oceans, and the Earth's surface and interior.
Cellular respiration and photosynthesis respectively release and capture carbon dioxide from the atmosphere, as a by-product or input of their biochemical pathways, carbon from CO2 is absorbed by plants and released along with water vapor during animal respiration.
Therefore, we can conclude that according to the diagram, cellular respiration and photosynthesis are the phrases that best summarize the events taking place in Step 2.
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I'd say Photosynthesis and Storing carbon dioxide in living organisms.
But the person above me shows alot more detail than I have.
If atom a gives up electrons to atom b what will the elecrical charge of atom a be
Answer:
The electric charge of the atom 'a' will be "+1".Explanation:
When an atom gains/loses an electron, the atom becomes charged, and is called an ion. Gaining an electron results in a negative charge, so the atom is an anion. Losing an electron results in a positive charge, so atom ion is a cation.
It means that the 'Atom A' is giving that is, losing the electrons
Please help me? I am not understanding any of this
Answer:
Hydrogen
Explanation:
These are what hydrogen isotopes look like
what whould happend if humans used all the fossil fuels on the earth
There are several things that would happens,if all of the fossil fuels were used.The most important is in bold,but I made a quick list below to note.<3
The biggest affects would be that humans would have to find other sources of energy in order to survive. An increase of renewable as well as nuclear energy will be used in order to help build back society.-War Would Break Out
-The Earth's Climate Would Be Far From Safe & Would Cause A Huge Decrease In Population
-A Huge Portion Of The World Would Be Living In Poverty
-Failing Economies
-A Worthless Planet
-Also want to not that it is almost impossible to run out of fossil fuels, but if we do,it won't be thousands of years in the future.
I HOPE THIS HELPS! & and good luck on your assignment.
What is the maximum mass of ethyl alcohol you could boil with 1000 j of heat, starting from 20°c?
The amount of maximum mass of ethyl alcohol that could we boil with 1000 J of heat, starting from 20°C is 7.08 grams.
How do we calculate the mass?Mass of the ethyl alcohol will be calculated by using the below equation as:
Q = mcΔT, where
Q = absorbed heat = 1000 Jm = mass of ethyl alcohol = ?c = specific heat of ethyl alcohol = 2.42 J/g.°CΔT = change in temperature = (78.37°C - 20°C) = 58.37°COn putting all these values, we get
m = 1000 / (2.42)(58.37) = 7.079 = 7.08g
Hence required mass of ethyl alcohol is 7.08grams.
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What kind of waves do light waves travel in and how do they move
For the neutralization reaction involving hno3 and ca(oh)2, how many liters of 1. 55 m hno3 are needed to react with 45. 8 ml of a 4. 66 m ca(oh)2 solution?
For the neutralization reaction involving HNO₃ and Ca(OH)₂, liters of 1.55 M HNO₃ are needed to react with 45.8 ml of a 4.66 m Ca(OH)₂ solution is 0.270 L.
What is neutralization reaction?Those reactions in which acids and bases will combine with each other for the formation of water molecule and salt, is known as neutralization reaction.
Given chemical reaction is:
2HNO₃ + Ca(OH)₂ → 2H₂O + Ca(NO₃)₂
Moles (n) of Ca(OH)₂ will be calculated by using the below formula:
M = n/V, where
M = molarity = 4.66M
V = volume = 45.8 mL = 0.045 L
n = (4.66)(0.045) = 0.2097 mol
From the stoichiometry of the reaction,
1 mole of Ca(OH)₂ = reacts with 2 moles of HNO₃
0.2097 mole of Ca(OH)₂ = reacts with 2×0.2097=0.419 moles of HNO₃
Again by using the molarity equation volume will be calculated for HNO₃ as:
V = (0.419) / (1.55) = 0.270 L
Hence required volume of HNO₃ is 0.270 L.
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