Answers
Answer:
3
Explanation:
the answer is 3 because it is 3 for the o2 so 3 you have to pay more attention for the small ditails
Related Questions
How many joules are required to eat 5.25 g of titanium from 85.5 celsius to 132.5 celsius
Answers
The amount of energy required to eat 5.25 g of Titanium from 85.5 celsius to 132.5 celsius is 129 joules.
How do we calculate required heat?Absorbed or released amount of heat will be calculated by using the below formula as:
Q = mcΔT, where
m = mass of titanium = 5.25g
c = specific heat of titanium = 0.523 J/gram degree celsius
ΔT = change in temperature = 132.5 - 85.5 = 47 degree celsius
On putting these values on the above equation we get,
Q = (5.25)(0.523)(47) = 129 joules
Hence required heat is 129 joules.
To know more about absorbed heat, visit the below link:
https://brainly.com/question/8828503
This type of intermolecular force relates to the
big difference in the electronegativities. It exists
when N, O or F atom attracts with hydrogen
atom. Medium strength of attraction is
exhibited
Answers
The type of intermolecular force relates to the big difference in the electronegativities and is known as hydrogen bonding.
What are intermolecular forces?Intermolecular forces may be defined as the mechanism that mediates the interaction between the atoms of the molecules. It significantly includes the electromagnetic forces of attraction and repulsion between the atoms.
Some examples of intermolecular forces include London-dispersion force, dipole-dipole interaction, van der Waals interaction, hydrogen bonds, etc. Each one of them possesses a different set of characteristic properties distinctly. Some types of forces are also present in the body of living organisms.
Hydrogen bonding is a characteristic kind of interaction that remarkably includes dipole-dipole attraction between the most electronegative elements like Nitrogen, Oxygen, fluorine, etc., and the hydrogen atom.
Therefore, hydrogen bonding is a type of intermolecular force relates to the big difference in the electronegativities.
To learn more about Intermolecular forces, refer to the link:
https://brainly.com/question/13588164
#SPJ2
Which compound has the longest carbon-carbon bond length?.
Answers
Hokkaido University researchers have synthesized an organic compound with a longer bond between carbon atoms than ever before - exceeding the assumed limit for carbon-carbon single bond (C-C) lengths. The researchers termed it a "hyper covalent bond." The novel polycyclic hydrocarbon named 10c is stable, and an X-ray analysis showed that its C-C bond lengths was as long as 1.806 angstroms, longer than the previously reported world records for hydrocarbons.
4. One mole of H2O has a mass of 18g. How many moles of H,0 are there in 54g of
H2O?
Answers
Answer: 3 moles
Explanation: Divide 54 by 18 to get 3.
How many moles of sulfur are in 53.7 grams of sulfur?
Answers
THE ATOMICITY OF SULPHUR IS 8 AND ITS MASS NUMBER IS 32.
SO, THE ATOMIC MASS IS 256
NO.OF.MOLES= 53.7/256
= 537/2560
= 0.2097
Answer:
1.67 moles (find this by dividing 53.7 by the gram formula mass of sulfur, which is about 32.1)
A gas is formed in the reaction shown below. The gas laws can help determine the volume of gas produced.
Zn(s) + 2 HCl(aq) → ZnCl₂ + H₂(g)
Assume that 130.8 grams of Zn was used in this reaction. To determine the number of moles of hydrogen gas formed, you need to know the number of moles of Zn reactant was used. What quantity in moles of Zn were used?
Answers
Considering the definition of molar mass, the number of moles of Zn reactant used is 2 moles.
Definition of molar massThe molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
Number of moles of Zn usedThe balanced reaction is:
Zn(s) + 2 HCl(aq) → ZnCl₂ + H₂(g)
Assume that 130.8 grams of Zn was used in this reaction.
To determine the number of moles of hydrogen gas formed, you need to know the number of moles of Zn reactant was used.
So to determine the number of moles used you know that the molar mass of Zn is 65.37[tex]\frac{g}{moles}[/tex]. Then:
[tex]molar mass=\frac{mass}{number of moles}[/tex]
[tex]65.37\frac{g}{moles} =\frac{130.8 g}{number of moles}[/tex]
Solving:
number of moles× 65.37[tex]\frac{g}{moles}[/tex]= 130.8 g
[tex]number of moles=\frac{130.8 g}{65.37\frac{g}{moles}}[/tex]
number of moles≅ 2 moles
Finally, the number of moles of Zn reactant used is 2 moles.
Learn more about molar mass:
brainly.com/question/5216907
brainly.com/question/11209783
brainly.com/question/7132033
brainly.com/question/17249726
2)
Molarity is defined as the
A)
moles of solute per liter of solution
B)
moles of solute per kilogram of solvent
volume of a solvent
C)
D)
mass of a solution
Answers
Answer:
A.moles of solute per liter of solution
Explanation:
the total number of moles of substances present; mass percentage, the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams.
:-befrank
How many grams are in 4.80 mol of sodium chloride ( NaCl )?
Answers
[tex]w = \text{Number of mols} \times \text{Molar mass}=4.8 \times 58.5=280.8~ g[/tex]
We know,
Molar Mass of Sodium= 23 and,
Molar Mass of Chlorine= 35.45
[tex] \therefore \text{Molar Mass of Sodium chloride= 58.44 }\text{g/mol}[/tex]
So, The Molar Mass in Grams=
[tex]58.44 \frac{\text{g}}{ \cancel\text {mol}} \times 4.80 \: \cancel\text{mol} \\ \\ \text{Mass of NaCl }= 280.51\: \text {gram}[/tex]
Hope This Helps!!Calculate the molarity of a solution prepared by diluting 7.0 mL of 4.0 M solution to a volume of 30 mL.
Answers
Considering the definition of dilution, the molarity of a solution prepared by diluting 7.0 mL of 4.0 M solution to a volume of 30 mL is 0.93 mL.
What is diluionFirst of all, you have to know that when it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.
Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.
In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.
A dilution is mathematically expressed as:
Ci×Vi = Cf×Vf
where
Ci: initial concentrationVi: initial volumeCf: final concentrationVf: final volumeMolarity of the solution in this caseIn this case, you know:
Ci= 4 M Vi= 7 mLCf= ?Vf= 30 mLReplacing in the definition of dilution:
4 M× 7 mL= Cf× 30 mL
Solving:
(4 M× 7 mL)÷ 30 mL= Cf
Cf= 0.93 mL
In summary, the molarity of a solution prepared by diluting 7.0 mL of 4.0 M solution to a volume of 30 mL is 0.93 mL.
Learn more about dilution:
brainly.com/question/20113402
brainly.com/question/22762236
please help
If the colored spheres represent different solute particles, based on the principles of osmosis, in which overall direction is water (not pictured) most likely to move?
A.
Water will move into the cell.
B.
Water will not move into or out of the cell.
C.
Water will move into and out of the cell equally.
D.
Water will move out of the cell.
Answers
If the colored spheres are solutes, the overall direction of water would be out of the cell based on the principle of osmosis.
What is osmosisIt is the movement of water molecules from the region of high water potential (low solutes) to the region of low water potential (high solute) through a selectively permeable membrane.
In the illustration, there are more colored spheres outside of the cell than inside of it. This means that there are more solutes outside the cell (lower water potential) than inside of the cell (higher water potential).
Thus, water will move from the inside of the cell to the outside until an equilibrium is established.
More on osmosis can be found here: https://brainly.com/question/1799974
A dock worker uses a pulley system to raise a boat onto a dock. the pulley system has a mechanical efficiency of 73 %. the boat has a weight of 950 n. the pulley system lifts the boat 5 m into the air. how many newton-metres of work does the dock worker have to exert to lift the boat?
Answers
The work (newton-metres) the dock worker have to exert to lift the boat to 5 m in air is 6506.85 Nm
What is work done?This is simply defined as the product of force and distance moved in the direction of the force. Mathematically, it can be expressed as
Workdone (Wd) = force (F) × distance (d)
Wd = Fd
How to determine the output work done Force (F) = 950 NDistance (d) = 5 mOutput work =?Output work = Fd
Output work = 950 × 5
Output work = 4750 Nm
How to determine the input work done Output work = 4750 NmEfficiency = 73%Input work =?Efficiency = (output / input) × 100
73% = 4750 / input
0.73 = 4750 / input
Cross multiply
0.73 × input = 4750
Divide both side by 0.73
Input work = 4750 / 0.73
Input work = 6506.85 Nm
Learn more about efficiency:
https://brainly.com/question/2009210
PLEASE HELP!!!! WILL MARK BRAINLIEST!!!! A rigid steel container with a volume of 30 L is filled with oxygen to a pressure of 9.00 atm at 28.0 °C. What is the pressure in the container if the temperature is raised to 129.0 °C?
Answers
Answer:
12 atm
Explanation:
First, let us convert Celcius into Kelvin: 28.0 °C = 301.15 K and 129.0 °C = 402.15 K
For this question we must employ the Combined Gas Law: [tex]\frac{P_1V_1}{P_2V_2}=\frac{n_1RT_1}{n_2RT_2}[/tex], where [tex]P_1[/tex] is the initial pressure and [tex]P_2[/tex] is the new pressure.
We know that intitially, P=9 atm, V=30 L, and T=301.15K. From our problem, only temperature and pressure changes, while the number of moles, volume and the gas constant, R, stay the same, so they are irrelevant.
Thus, the filled out Combined Gas Law would be:
[tex]\frac{9 atm}{P_2}[/tex]=[tex]\frac{301.15K}{402.15K}[/tex], where the volume, moles of gas, and R are cancelled out.
We can manipulate this equation to derive the new pressure. We find that
9atm≈0.74885[tex]P_2[/tex].
This means that
[tex]P_2[/tex]≈9/0.74885≈12 atm
According to the first law of thermodynamics, what quantity is conserved?.
Answers
Answer:
energy
Explanation:
The First Law of Thermodynamics (Conservation) states that energy is conserved, it cannot be created nor destroyed.
During the degradation of many amino acids, the first step involves transfer of the amino group to which citric acid cycle intermediate?.
Answers
if you looking for more answers involving this assignment you can search up on quizlet biochem practice questions unit 2
Is Iron rusting a physical, or chemical change?
Answers
Answer:
the answer is chemical change because the act of rusting changes the substance of iron
Explanation:
Determine whether Z is a “poison”. Explain your reasoning.
Answers
The substance Z will be a poison if it produces adverse effects on th body even in small quantities.
What is a poison?A poison is a substance which when ingested into the body of an organism causes harm or injury to that organism.
Poisons can be in gaseous, solid or liquid form.
Poisons may be natural or synthetic in nature.
The characteristics of poison include:
The produce adverse effects in the body they are toxic even in small amountsTherefore, the substance Z will be a poison if it produces adverse effects on th body even in small quantities.
Learn more about poisons at: https://brainly.com/question/24442473
A small sample of methane burns, producing co2 and water vapor. as the hot gas mixture expands, it releases 120.0 kj of heat and does 830.0 kj of work pushing against a piston. what is the total amount of energy released in this reaction
Answers
A small sample of methane burns, releasing 120.0 kJ of heat and doing 830.0 kJ of work. The total energy released is -950.0 kJ.
What is energy?Energy is a property that is transferred to a physical system, recognizable in the performance of work and in the form of heat and light.
A small sample of methane undergoes combustion. As the hot gas mixture expands, it releases energy (E).
It releases 120.0 kJ of heat. By convention, when heat is released, we assign it a negative sign. Thus, q = -120.0 kJ.It does 830.0 kJ of work. By convention, when the system does work on the surroundings, we assign it a negative sign. Thus, w = -830.0 kJ.The change in the energy is the sum of the heat released and the work done.
ΔE = q + w = -120.0 kJ + (-830.0 kJ) = -950.0 kJ
A small sample of methane burns, releasing 120.0 kJ of heat and doing 830.0 kJ of work. The total energy released is -950.0 kJ.
Learn more about energy here: https://brainly.com/question/13881533
Can someone help me explain three features that make Lake Baikal one of the most unique lakes in the world.
Answers
Explanation:
1,it's crystal clear water and unique wild life.
2,It is home to many unique species animals and plants.
3, It's sediment have not been scoured by overriding continental ice sheet
Please help
AB+C<— A+CB
—>
Question 1: Imagine that the reaction starts with 100 molecules of reactants and zero molecules of products. Explain why the amount of reactants will never reach zero.
Question 2: imagine that the reaction starts with 0 molecules of reactants and 100 molecules of products. Will the amount of products increase or decrease as the reaction proceeds? Explain.
Answers
The rate of forward reaction equal to the rate of reverse reaction hence the amount of reactants will never reach zero.
Chemical reactionA chemical reaction involves the combnation of two or more species to yiled products. We must know that a point is always reached in a reaction when the rate of forward reaction equal to the rate of reverse reaction hence the amount of reactants will never reach zero.
Also, if the reaction starts with 0 molecules of reactants and 100 molecules of products, the amount of products will decrease overtime.
Learn more about rate of reaction: https://brainly.com/question/13929053
Molecules are chemically bonded atoms that work as a unit. Should the same kind of molecule be made up of the same kind of elements? Explain your answer
Answers
Answer:
Are molecules atoms that are chemically bonded together?
Image result for Molecules are chemically bonded atoms that work as a unit. Should the same kind of molecule be made up of the same kind of elements? Explain your answer
If this interaction is such that the total energy of the system is lowered, then the atoms bond together to form a molecule. Thus, from a structural point of view, a molecule consists of an aggregation of atoms held together by valence forces. Diatomic molecules contain two atoms that are chemically bonded.
Explanation:
REALLY HOPE THIS HELPS!
An ion has a charge of +3 and has 51 electrons. How many protons does it have?
Answers
Answer:
54 protons
Explanation:
51 electrons 'balance' the charge of 51 protons....but there is three more PLUS charges ......means three more protons
51 + 3 = 54
Question 4 of 25
How do scientists write very large numbers?
O A. They round off all numbers to a few digits after the decimal.
O B. They express the numbers using scientific notation.
O C. They divide all numbers by a constant to reduce the size.
O D. They simplify the numbers by deleting the exponents.
Answers
Answer:
B.
Explanation:
what is the pH of 3.65 grams of HCl dissolved in 1250 mL distilled H2O
Answers
Considering the definition of pH, the pH of 3.65 grams of HCl dissolved in 1250 mL distilled H₂O is 1.0969.
Definition of pHpH is the Hydrogen Potential. It is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:
pH= - log [H⁺]
The numerical scale that measures the pH of substances includes the numbers from 0 to 14. The pH value 7 corresponds to neutral substances. Acidic substances are those with a pH lower than 7, while basic substances have a pH higher than 7.
Concentration of HClMolar 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]
In this case, you know:
number of moles=[tex]3.65 grams x\frac{1 mole}{36.45 grams} =[/tex] 0.1 moles (being 36.45 g/mole the molar mass of HCl)volume= 1250 mL= 1.250 L (being 1000 mL= 1 L)Replacing in the definition of molarity:
[tex]Molarity=\frac{0.1 moles}{1.250 L}[/tex]
Solving:
Molarity= 0.08 [tex]\frac{moles}{liter}[/tex]= 0.08 M
pH of the solutionHydrochloric acid is a strong acid, so in aqueous solution it will be totally dissociated. So the concentration of protons is equal to the initial concentration of acid. This is: [H⁺]= [HCl]= 0.08 M
Replacing in the definition of pH:
pH= - log (0.08 M)
Solving:
pH= 1.0969
Finally, the pH of 3.65 grams of HCl dissolved in 1250 mL distilled H₂O is 1.0969.
Learn more about
pH:
brainly.com/question/3992824
https://brainly.com/question/12200689
molarity:
brainly.com/question/9324116
brainly.com/question/10608366
brainly.com/question/7429224
a gas that has a pressure of 7.5 atm and a volume of 20L what would be the new volume if the pressure was changed to 3.5 atm
Answers
Answer: 43 L
Explanation:
A mutation can be defined as a change in an organism's
transcription.
phenotype.
genotype.
proteins.
Answers
Answer:
Genotype
Explanation:
A mutation is the change is DNA, aka the genotype
In the chemical formula h2o, which description explains what the 2 represents?.
Answers
H_2O is the chemical formula of compound water.
Here
2 denotes to no of hydrogen atoms as it's after HIn water
There are
2Hydrogen atoms1 Oxygen atoms A lone pair is present over Oxygen atomAt constant temperature, a sample of helium at 760. Torr in a closed container was compressed from 5. 00 l to 3. 00 l. What was the new pressure exerted by the helium on its container?.
Answers
P₁V₁=P₂V₂
760.5=P₂.3
P₂=1266.6 torr
Given that the molar mass of naoh is 40.00 g/mol, what mass of naoh is needed to make 2.500 l of a 2.000 m naoh solution? use molarity equals startfraction moles of solute over liters of solution endfraction.. 0.1250 g 5.000 g 32.00 g 200.0 g
Answers
The mass of Sodium hydroxide which is needed to make 2.500 L of a 2.000 M NaOH solution is 200 grams.
How do we calculate mass from moles?Mass of any substance will be calculated by using their moles as:
n = W/M, where
W = required mass
M = molar mass
Given that, molarity of NaOH = 2M
Volume of NaOH solution = 2.5L
Moles of NaOH will be calculated by using the below equation as:
M = n/V
n = (2)(2.5) = 5 moles
Now we calculate the mass of NaOH of 5 moles as:
W = (5mol)(40g/mol) = 200g
Hence option (4) is correct.
To know more about moles, visit the below link:
https://brainly.com/question/15303663
Answer:
d
Explanation:
HeLP PLeAsE~ HelP pLeASe~ 500 pOInTs~
Bromthymol blue is an acid-base indicator that changes color around pH 7. Adding a small amount of bromthymol blue to a basic solution would be most helpful in _____.
A. determining the identity of the base in the solution
B. tracking the pH as the solution is gradually acidified
C. precisely measuring the pH of the solution
D. calculating the concentration of the base in the solution
Answers
Answer:
B) tracking the pH as the solution is gradually acidified
Explanation:
Got it right on the quiz!
hope this helped!
brainliest please!
Answer:
B. tracking the pH as the solution is gradually acidified
What amount of alcohol consumed while boating is equivalent to the amount on land.
Answers
Answer:
yes it is
Explanation:
while boating or on the land it is the same amount of alcohol
Answer:
Any amount will be have the same effect on Blood Alcohol Content while boating OR on land .
Explanation:
