Answer:
5 L
Explanation:
Molarity = mol/L ----> L = mol/molarity
2.0 moles / 0.4 M HF = 5 L
If a lab requires you to use 1.25 mol oxygen gas in a chemical reaction, how many molecules of oxygen will you need?
Answer:
7.53*10²³ molecules of oxygen will you need.
Explanation:
Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number applies to any substance.
You can then apply the following rule of three: if by definition of Avogadro's Number 1 mole of oxygen gas contains 6.023*10²³ molecules, 1.25 moles contains how many molecules?
[tex]amount of molecules=\frac{1.25 moles*6.023*10^{23}molecules }{1 mole}[/tex]
amount of molecules= 7.53*10²³
7.53*10²³ molecules of oxygen will you need.
An unknown amount of sodium azide (NaN3) reacts and produces 0.033 moles of nitrogen gas. What mass of sodium metal is produced
Answer:
Mass of sodium metal is 130.87 gram
Explanation:
The complete reaction is
2 NaN3 --> 2 Na + 3 N2
We know that PV = nRT
n = [tex]\frac{PV}{RT}[/tex]
On substituting the given values, we get
[tex]n = \frac{\frac{99707}{101325}*75 }{0.082 *(273.15 +15)} \\n = 3.02[/tex]moles of N2
Sodium azide's molar mass
3.02 *(2/3) = 2.013 moles
Mass = 2.03 * 65.01 = 130.87 gram
CH3(ch2)2C(ch3)3 IUPAC name please?
Answer:
Explanation:
The name is of the compound is 3,3,4,4-tetramethylhexane.
Using this illustration, what is the chemical formula? Picture and possible answers are below.
The answer is It is NH3.....
1. If I have 45 L of He in a balloon at 25 degrees celsius and increase the temperature of the
balloon to 55 degrees celsius, what will the new volume of the balloon be?
Use Charles' Law: V1/T1 = V2/T2. We assume the pressure and mass of the helium is constant. The units for temperature must be in Kelvin to use this equation (x °C = x + 273.15 K).
We want to solve for the new volume after the temperature is increased from 25 °C (298.15 K) to 55 °C (328.15 K). Since the volume and temperature of a gas at a constant pressure are directly proportional to each other, we should expect the new volume of the balloon to be greater than the initial 45 L.
Rearranging Charles' Law to solve for V2, we get V2 = V1T2/T1.
(45 L)(328.15 K)/(298.15 K) = 49.5 ≈ 50 L (if we're considering sig figs).
a substance made up of only atoms of one type is called
Answer: chemical element
Explanation: A chemical element is a substance that contains only one type of atom, which is the smallest particle of an element.
Which of these is a learned behavior of a dog?
1.Begging for food
2.Drinking water
3.Panting on a hot day
4.Chewing on a bone
10 How does no-till farming help the environment?
A It decreases soil erosion.
C It increases fertilizer use.
B It increases soil removal.
D It decreases crop yield.
Answer: Answer is A it will decrease soil erosion
Explanation:it just will trust me
Answer:
A.
Explanation:
the soil will not loosen when u till it
A student adds 5400.0mL of 0.15M NaOH to 201.2mL of 4.0M NaOH. What is the final [NaOH]?
Answer:
0.287 M
Explanation:
Multiply the concentration of each solution by the volume of each (in liters) to get the moles of NaOH in that solution.
0.15 M • 5.4000 L = 0.81 mol NaOH
4.0 M • 0.2012 L = 0.80 mol NaOH
Add the mol of NaOH together to get the total --> 0.81 + 0.80 = 1.61 mol NaOH
Divide by the total volume of solution (5400.0 mL + 201.2 mL = 5,601.2 mL = 5.6012 L)
1.61 mol / 5.6012 L = 0.287 M NaOH
How much water must be added to 40.0 g of CaCl2 to produce a solution that is 35.0 wt% CaCl2?
The mass of water present in the solution is 21.5 g.
What is concentration?Concentration refers to the amount of solute in a solution. There are various ways of expressing concentration such as;
Molar concentrationMass concentrationPercentage concentrationWe have the following information;
Percent concentration = 35.0 %
mass of solute = 40.0 g
Mass of water = ?
So;
35 = x/40 + x × 100/1
35 = 100x/40 + x
35(40 + x) = 100x
1400 + 35x = 100x
1400 = 100x - 35x
1400 = 65x
x = 1400/65
x = 21.5 g
Hence the mass of water is 21.5 g.
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Pt2 science......
Select correct answer ♡!
Determine which molecule in each pair has the stronger intermolecular forces. Explain why. The main reason that NH3 has [ Select ] intermolecular forces than CH4 is that NH3 [ Select ] . The main reason that NO2 has [ Select ] intermolecular forces than CO2 is that NO2 [ Select ] . The main reason that CS2 has [ Select ] intermolecular forces than CO2 is that CS2 [ Select ] .
Answer:
See explanation
Explanation:
As for NH3 and CH4, the former is a polar molecule and possess a dipole. Hence, in addition to dispersion forces, dipole-dipole interaction as well as hydrogen bonding creates a stronger intermolecular interaction than in nonpolar CH4 where only dispersion forces are in operation.
Between NO2 and CO2, the former possesses a dipole moment while the later does not. As a result of that, dipole interaction are in operation in NO2 while only dispersion forces are n operation in CO2.
Between CO2 and CS2, the both molecules are nonpolar but CS2 has a greater molecular mass than CO2. Recall that the greater the molecular mass of a substance the greater its magnitude of intermolecular forces.
Taking into account the intermolecular forces, you get that:
The main reason that NH₃ has weaker intermolecular forces than CH₄ is that NH₃, being nonpolar, possesses London Dispersion Forces, while CH₄ possesses the Hydrogen Bonding forces.The main reason that NO₂ has the same intermolecular forces than CO₂ is that in NO₂ and CO₂ there are London forces because they are nonpolar molecules. The main reason that CS₂ has the same intermolecular forces than CO₂ is that CS₂ in CS₂ and CO₂ there are London forces because they are nonpolar molecules.Intermolecular forces or bonds are those interactions that hold molecules together. These are electrostatic forces.
Van der Waals forces are weak attractions that hold electrically neutral molecules together. At some point these molecules present an induced dipole, that is, the molecule acquires a partially positive and a partially negative charge momentarily, causing them to attract each other. They are Van de Waals forces: Dipole - Dipole Forces, London Forces, Ion - Dipole Forces.
London Dispersion Forces: occurs between nonpolar molecules due to the movement of electrons. At some point there are more electrons to one side, which, being close to another atom or molecule, the electrons of the second are repelled, originating two instantaneous dipoles, which originate an attractive force. In summary, this type of force occurs because when two molecules approach, a distortion of the electronic clouds of both is originated, generating in them, transient induced dipoles, due to the movement of the electrons, thus allowing them to interact with each other. They are very weak forces.Ion-ion forces: It is the attraction between two ions of different charges: cations (positively charged ion) and anions (negatively charged ion). That is, it occurs between different charged molecules that will tend to form an electrostatic bond between the ends of opposite charges due to the attraction between them.Ion-dipole forces: these are forces of attraction between an ion (an atom that has lost or gained an electron, so it has a charge) and a polar molecule. A molecule is a dipole when there is an asymmetric distribution of electrons because the molecule is made up of atoms of different electronegativity. The ion then binds to the part of the molecule that has its opposite charge: the positive end of the polar molecule is oriented towards the anion (negatively charged ion) and the negative end of the polar molecule is oriented towards the cation ( positively charged ion).Dipole-dipole forces: dipole-dipole forces are forces of attraction between polar molecules. These molecules attract when the positive end of one of them is close to the negative of the other.Hydrogen bonds: they are a type of dipole-dipole force. In this interaction, a molecule that presents hydrogen interacts with another that presents an atom with high electronegativity, such as oxygen, fluorine or nitrogen (O, F, N). In this way, between the hydrogen, which has a low electronegativity and the electronegative atom, an interaction is established, due to their opposite charges.The relative order of magnitude of the intermolecular forces is:
Ion-ion forces> Ion-dipole forces> Hydrogen bonds> Dipole-dipole forces> London Dispersion Forces
Taking into account all the above, it can be said that:
The main reason that NH₃ has weaker intermolecular forces than CH₄ is that NH₃, being nonpolar, possesses London Dispersion Forces, while CH₄ possesses the Hydrogen Bonding forces.The main reason that NO₂ has the same intermolecular forces than CO₂ is that in NO₂ and CO₂ there are London forces because they are nonpolar molecules. The main reason that CS₂ has the same intermolecular forces than CO₂ is that CS₂ in CS₂ and CO₂ there are London forces because they are nonpolar molecules.Learn more:
https://brainly.com/question/17111432?referrer=searchResultshttps://brainly.com/question/14220340?referrer=searchResults8. Calculate the pH of a solution if the [OH-] concentration is 0.015 M.
A) 1.82
B) 8.82
C) 12.18
D) 4.32
Answer:
1.82
Explanation:
pH is given by the equation
if the original volume of a gas was 300 ml at 0.250 atm and 400.0 k what is the volume of the gas at 2.00 atm
Answer:
the answer is 18.75
which reacts faster, rock salt or grains of salt? Why?
Answer:
salt
Explanation:
because it has a much larger volume ratio
1. Write the chemical symbol for each of the following elements.
Aluminum
Beryllium
Calcium
Flourine
Neon
Nitrogen
Silicon
Silfur
2. Write the name of the element for each of the following symbols.
Ar
B
Li
Na
Fe
3. What is the atomic number for the following elements?
C
Fe
Pb
O
N
Zn
Answer:
Chemical symbol:
Aluminum:Al
Berylium: Be
Calcium: Ca
Flourine: F
Neon: Ne
Nitrogen: N
Silicon: Si
Silfur: S
Element name
Ar: Argon
B: Boron
Li: Lithium
Na: Sodium
Fe: Iron
Atomic number
C:6
Fe: 26
Pb: 82
O: 8
N: 7
Zn: 30
Answer:
aluminum- Al
beryllium- Be
calcium- Ca
flourine- F
neon- Ne
nitrogen- N
silicon- Si
sulfur- S
_____________________________________________________
Ar- argon
B- boron
Li- lithium
Na- sodium
Fe- iron
______________________________________________________
C- 6
Fe- 26
Pb- 82
O- 8
N- 7
Zn- 30
Explanation:
IS ANYONE GOOD WITH CHEMISTRY???! i need help lol
Answer:
Help with what?
Explanation:
Answer:
help with whattt
Explanation:
um
Describe the different energy levels of electrons in an atom.
Answer:
Explanation:
If it is at a higher energy level, it is said to be excited, or any electrons that have higher energy than the ground state are excited. They are then called degenerate energy levels.
The hammerhead shark can reproduce both sexually and asexually. What characteristic of the offspring would suggest that they were produced
through sexual reproduction? Offspring are-
all the same gender.
genetically diverse.
produced in small number.
produced very slowly.
Answer: I think it is ‘Genetically diverse’
Explanation:
WHAT INVESTMENT OF A $125 WOULD HAVE THE MOST LASTING VALUE FOR YOUR FUTURE?
A pair of jordans
Some nice cologne or perfume
3 college credits at MCC BAG
a dinner with 2 or 3 people
Answer:
a pair of jordans
Explanation:
Using an analogy of a water balloon, describe the function of the bladder.
Answer:
A bladder is like a balloon, because it holds urine, just like a balloon holds air. The urethra's function is to excrete urine from the human body.
Explanation:
A bladder and a balloon are similar, because it is the bladder which clasp urine, whereas a balloon clench air. The role of urethra is to eliminate urine from our human body.
What is bladder?The hollow organ which is in triangle shape and found in the lower abdomen just like a balloon is defined as the bladder. The urinary bladder is also known as a temporary reservoir of urine. Urine is reserved in the urinary bladder till it is removed out through the urethra.
As a result of the contraction of the wall of the urinary bladder, urine is eliminated from the body from time to time. The urine contains waste and extra fluid left over the body which has to be eliminated.
The bladder resembles the water balloon in that it holds urine in the similar way as the water balloon clench water. The water balloon pops when the amount of water exceeds than it can hold.
Thus the function of bladder and water balloon are found to be same.
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What molecules are affected by injury to the pancreas?
Answer:
Causative/sensitizing factors of pancreatic injury include refluxed bile acids, alcohol, and pH. They largely mediate downstream events such as elevated intracellular Ca2+ via influx through TRPC3 channels and release from IP3 and ryanodine-sensitive Ca2+ stores.
Explanation:
Given this balanced equation: CS2 + 3 O2 CO2 + 2 SO2
Calculate how many moles of SO2 can be produced with when given 4 moles of CS2.
58.67 g
Now calculate how many moles of SO2 can be produced with when given 4 moles of O2.
Which one is the limiting reactant (4 moles CS2 or 4 moles of O2)? How do you know?
Answer: The FitnessGram PACER Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The test is used to measure a student's aerobic capacity as part of the FitnessGram assessment. Students run back and forth as many times as they can, each lap signaled by a beep sound.
Explanation:
The form in which the chemical energy is stored in cells during photosynthesis
A) Photosynthesis
B)Products
C)Chloroplasts
D)Glucose
PLEASE ME!!!! ANSWER IF YOU KNOW THE ANSWER
Answer:
organism 1
Explanation:
the arrow points away from it so that means that it is being eaten and it always starts from a producer so organism 1 is likely a producer :)
350.0 ML of air is at 23.0°C what is the volume at 90.0°C
Answer:
V=0.430 Liters
Explanation:
First off you need to convert ml to l and celsius to kelvin, in order for them to be in the S.I.
So, 350.0mL is 0.350 L and 23.0 C is (273.15+23=) 296.15 K (you can ignore the 0.15)
From the equation pV=nRT, lets name this equation (1), we can tell that the number of moles, pressure, and R, stay the same. The only thing changing is the volume, and temperature.
With the information given, let's figure out the pressure. From equation (1) if we solve it for the pressure of the gas, p=nRT/V => p=nR*296.15/0.350 => p=846.15 *nR
Now, we have to figure out the volume of the gas at 90.0 C (363.15 K), and solve equation (1) for volume, using the pressure we previously found.
v=nRT/p => v=nR*363.15/846.15*nR => (the nR's from top and bottom go away) v=0.429 L
Since we used 273.15 for the conversion of celsius to Kelvin, we could round up the number to
V=0.430 Liters
Someone help me out with this brain pop ⚠️
What do plants do that requires Energy?
Answer:
Photosynthesis
Explanation:
Photosynthesis uses energy from light to convert water and carbon dioxide molecules into glucose (sugar molecule) and oxygen. The oxygen is released, or “exhaled”, from leaves while the energy contained within glucose molecules is used throughout the plant for growth, flower formation, and fruit development.
PLEASE HELP!!!
Explain how an electric car might still run on fossil fuels.
Answer:
Explanation:
When you use electricity to charge your car, you can integrate renewable resources like solar into the fueling process. Without solar, your electric vehicle is still effectively running off of fossil fuels – it's just the fossil fuels utilized at the power plant and not within your engine.
Fossil fuels include substances like natural gas, coal, and oil. It is possible for electric cars to run on these fossil fuels. Fossil fuels like coal are burnt up to generate electricity. So when cars run on electricity, they are indirectly tapping into fossil fuels.
As the world continues to seek measures to reduce carbon emissions, electric cars are gradually becoming an option. While it is true that these fossil fuels might not be used directly on electric cars, they still find use indirectly in these cars. When coal is burnt up at the power plant to generate electricity, electric cars tap into fossil fuels indirectly.Learn more here:
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A ballon is filled with 1.22 L of gas at 286 K is heated until the volume is 2.86 L while the pressure remains constant. What is the temperature of the gas in kelvin?
Answer:
670.45 K
Explanation:
Given that,
Initial volume, V₁ = 1.22 L
Initial temperature, T₁ = 286 K
Final volume, V₂ = 2.86 L
We need to find the new temperature of the gas. The relation between the volume and the temperature is given by :
[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\\\\T_2=\dfrac{V_2T_1}{V_1}\\\\T_2=\dfrac{2.86\times 286}{1.22}\\\\T_2=670.45\ K[/tex]
So, the new temperature of the gas is equal to 670.45 K.