Answer:
To answer this question, we will need to use the gas law which states that:
PV = nRT where:
P is the pressure of the gas = 740 mmHg = 98658.550357 Pascal
V is the volume = 450 ml = 0.45 liters
n is the number of moles that we will calculate
R is the gas constant = 8.314 J/(K. mol)
T is the temperature = 35 celcius = 308 degrees kelvin
Substitute with these values in the above equation to get the number of moles as follows:
98658.550357 * 0.45 = n * 8.314 * 308
n = 17.3375 moles
Each mole contains Avogadro's number of atoms, therefore:
number of atoms = 17.3375 * 6.02 * 10^23 = 1.0437 * 10^25 atoms
A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is a stainless-steel cylinder that measures 21.0cm wide and 25.2cm high. The maximum safe pressure inside the vessel has been measured to be 4.00MPa. For a certain reaction the vessel may contain up to 0.474kg of boron trifluoride gas. Calculate the maximum safe operating temperature the engineer should recommend for this reaction. Write your answer in degrees Celsius. Be sure your answer has the correct number of significant digits.
Answer:
Explanation:
Volume of cylinder = πr²h where r is radius of cylinder, h is height of cylinder
r = d/2 = 21/2 = 10.5 cm; h = 25.2 cm
volume of cylinder = (22 * 10.5 cm * 10.5 cm * 25.2 cm) / 7
volume = 8731.8 cm³ = 8.7318 L
Using the ideal gas equation, PV = nRT
P = 4.00 MPa = 4.0 * 10³ kPa, V = 8.7318 L, R = 8.314 L.kPa/mol.K,
n = mass / molar mass
where mass = 0.474 kg or 474 g, molar mass of BF₃= 68 g/mol
n = 474 g / 68 g/mol = 6.9706 moles
making T subject of formula in the ideal gas equation;
T = PV/nR
T = (4.0 * 10³ kPa * 8.7318 L)/(6.9706 mol * 8.314 L.kPa/mol.K)
T = 602.675 K
T in °C = K - 273.15
T = 602.675 -273.15 = 329.5 °C
T = 330 °C
MnS+HCl H 2 S+MnCl 2 Which set of coefficients would balance the equation?
Answer:
1,2,1,1
Explanation:
How many grams of C12 can be prepared from the reaction of 16.0 g of MnO2 and 30.0 g of HCl according to the following chemical equation? Mn02 + 4HCI → MnCl2 + Cl2 + 2H2O
Answer:
Mass of Cl₂ produced 12.78 g
Explanation:
Given data:
Mass of MnO₂ = 16 g
Mass of HCl = 30.0 g
Mass of Cl₂ produced = ?
Solution:
Chemical equation:
MnO₂ + 4HCl → MnCl₂ + Cl₂ + 2H₂O
Number of moles of MnO₂:
Number of moles = mass / molar mass
Number of moles = 16 g/ 87 g/mol
Number of moles = 0.18 mol
Number of moles of HCl:
Number of moles = mass / molar mass
Number of moles = 30 g/ 36.46 g/mol
Number of moles = 0.82 mol
Now we will compare the moles of Cl₂ with MnO₂ and HCl.
MnO₂ : Cl₂
1 : 1
0.18 : 0.18
HCl : Cl₂
4 : 1
0.82 : 1/4×0.82 = 0.205 mol
The number of moles of Cl₂ formed by HCl are less it will limiting reactant.
Mass of Cl₂ formed:
Mass = number of moles × molar mass
Mass = 0.18 mol × 71 g/mol
Mass = 12.78 g
If a package of nuts weighs 41.3 what is the massif package express in milligram
Answer:
1170855 mg
Explanation:
Which of the following best describes the function of vacuoles?
O
Transferring energy throughout all kinds of cells
O
Storing materials in plant cells
Digesting food in animal cells
O
Protecting cells from the environment
They mainly store materials for other cells to use.
Balancing Equations and type of reaction quiz
Question 5
10 points!
Question 1 (1 point)
An)
is when someone forms a conclusion right after making an observation
Blank 1:
Question 2 (1 point)
is an educated guess
Blank 1:
Question 3 (1 point)
If I am doing an experiment over and over again of MY own investigation for accuracy then it's called
Blank 1:
Question 41 point)
If someone else is replicating an investigation then it is called
Blank 1:
Meeting in "
Question 51 point
Something I change in an experiment is called
Answer:
i need help on this too.
Explanation:
What is the function of a cell wall
(A) to protect and support the cell
(B) to perform different functions in each cell
(C) to prevent water from passing through the cell
(D) to prevent oxygen from entering the cell
Answer:
the answer is A to protect and support the cell
Answer:
A)
Explanation:
Is coffee and water heterogeneous or homogeneous?
Answer:
coffee is a homogeneous mixture while water is a heterogeneous mixture
4) A metal cylinder is placed in a graduated cylinder which has been filled with
water to the 80.0 mL mark. The water level rises to the 88.0 mL mark.
(a) What is the volume of the metal cylinder?
3
(b) The cylinder has a density of 3.21 g/cm^3. What is its mass?
Explanation:
(a).volume = final volume of water - initial volume of water
Volume of metal cylinder = 88 - 80
We have the answer as
8.0 mL(b).The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume = 8 mL
density = 3.21 g/mL
So we have
mass = 3.21 × 8
We have the answer as
25.68 gHope this helps you
“Zn” is a...
Chemicals Formula
Symbol
Name
Explanation:
Zn is a symbol
its name is zinc
What is the chemical symbol for 1s^22s^22p^6
Answer:
The chemical symbol of given electronic configuration is Ne.
Explanation:
First of all we will calculate the total number of electron from this electronic configuration:
1s² 2s² 2p⁶ = 2+2+6 = 10
we know that the number of electron of an atom shows its atomic number. The total number of electron in given electronic configuration are 10.
Now from periodic table we got to know that neon has atomic number of 10.
Thus the given electronic configuration is of neon atom.
Neon is belongs to noble gas family.
All noble gases have complete octet.
These are inert gases.
Energy transformations take place when batteries power a
flashlight
Which flowchart best represents how these transformations take place?
-
O A. Chemical (batteries) - electrical (electrical circuits)
electromagnetic (bulb)
O B. Electrical (batteries) - chemical (electrical circuits) -
electromagnetic (bulb)
electrical
C. Chemical (batteries) -- thermal (electrical circuits)
(bulb)
O D. Electrical (batteries) -- chemical (electrical circuits) - electrical
(bulb)
Answer: B. Electrical (batteries) - chemical (electrical circuits) -
Explanation: I'm really sorry if I am wrong. Cause it might be A. Chemical (batteries) - electrical (electrical circuits)electromagnetic (bulb)
-Hope this some what helps. :)
Answer:
A. Chemical (batteries) - electrical (electrical circuits)
electromagnetic (bulb)
When a runner participates in a marathon, they travel a distance of 26.2 miles. How many kilometers is
this?
Answer:
Around 42.2 Km
Explanation:
A group of students is investigating how a force applied to an object affects the motion of that object. The diagram shows the setup for the investigation. To create a force, the students add a weight to the weight holder and observe whether the cart moves. The students repeat this step five times, using a different amount of weight each time. Identify the independent and dependent variables of this investigation.
Answer:
87 is the wight of the hight
Explanation:
This figure (Figure 1)shows a container that is sealed at the top
by a movable piston. Inside the container is an ideal gas at 1.00
atm, 20.0°C, and 1.00 L. What will the pressure inside the container become if the piston is moved to the 1.60L mark while the temperature of the gas is kept constant
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Combined Boyle's gas law is used here. Therefore the new pressure inside the container will be 0.833 atm.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature.
Mathematically the relation between Pressure, volume and temperature can be given as
PV=nRT
where,
P = pressure of ideal gas
V= volume of ideal gas
n =number of moles of ideal gas
T =temperature of ideal gas
R = Gas constant = 0.0821 L.atm/K.mol
According to Boyle's gas law
P₁V₁ = P₂V₂
Substituting all the given values in the above equation, we get
(1 atm) (1 L) =(P2) ( 1.60L )
P2 = 0.833 atm
Therefore the new pressure inside the container will be 0.833 atm.
To learn more about ideal gas equation, here:
https://brainly.com/question/14826347
#SPJ2
i need help with question 1 please
Answer:86
Explanation: to find atomic mass you take the number of protons and the number of neutrons. therefore you take the 40 protons and the 46 neutrons to find the mass. :)
Answer:
86
Explanation:
To find the answer i added the proton and neuron
What is the density of water in g/mL? What does that mean?
Answer:
Its 1 g/ml
Explanation:
HELP!! I NEED AN ANSWER!!
Why does an iron gate have the same properties as an iron frying pan?
O both are black
O both are non-mental
O both are magnetic
O both are made of the same type of atoms.
i need help with this question
Answer:
i do not know the answer but pls give a heart and five starts so i can ask questions pls
Explanation:
Which of the following should be measured with a meter stick, not a tape measure?
A.
the length of ribbon needed to tie around a vase
B.
the size of a student's waist
C.
the distance from the ground to the top of a ramp
D.
the circumference of an orange
Answer:
C
the distance from the ground to the top of a ramp
Which choice below is not an example of a limiting factor:
Money
Space
Predators
Nutrients
Sunlight
How many CO2 molecules in 0.0189 mol of CO2?
.11 x 1022 molecules
.624 x 1023 molecules
1.14 x 1022 molecules
Answer:
Explanation:
44.0095 grams.
HELP NOW!!!!!! When you put water into a hot metal pan of equal mass, why does the pan cool down more than the water heats up?
Answer:
Because the specific heat of the metal is less than the specific heat of water.
Explanation:
Hello, happy to help you today!
In this case, we need to analyze a property called "specific heat" which accounts for how much energy is required to increase or decrease the temperature of 1 g of the substance by 1 °C.
In this case, since the specific heat of water is about 4.184 J/g°C and the specific heat of metals in general is greater than zero, of course, but less than one, we can infer that for the same amount of energy, when they are in contact, more grams of metal will be cooled down to those of water heated up, because the specific heat of the metal is less than the specific heat of water.
Best regards!.
the atomic number of an element is......
Answer:
the number of protons in the nucleus of an atom.
Explanation:
cause they are the same no matter what.
How much energy (in kcal) is involved when 5.2 g of water at 0.0oC is converted to ice? Enter only the numeric value for your answer (no units).
Answer:
[tex]Q=0.41kcal[/tex]
Explanation:
Hello.
In this case, since the energy involved during this process is associated to the freezing enthalpy of water at the freezing point of water (0.0 °C) and is computed via:
[tex]Q=m\Delta _{freezing}H[/tex]
It is known that the freezing enthalpy of water is -333.3 J/g, therefore, the involved heat is:
[tex]Q=5.2g*-333.33\frac{J}{g}\\ \\Q=-1733.33J[/tex]
Clearly, it is negative since freezing requires the removal of energy, which means it is negative based on the first law of thermodynamics. Finally, the energy in kcal turns out:
[tex]Q=1733.33J*\frac{1kcal}{4184kJ}\\ \\Q=0.41kcal[/tex]
Regards.
Please help my last question thank you if u did answer it
Answer:
I don't know sorry I hope you find what you're looking for
Answer:
I think the answer is G
Explanation:
Carbon atom has 6 electrons 6 protons and 6 neutrons.(electron =negetive) (proton=positive) (neutron=neutral)
You should know protons and neutrons are in nucleus of atom and electrons surround them.I think you understand.
Convert 29.85 degree Celsius to Kelvin
Answer:
its 303 Kelvin. (typing this for characters)
Balancing Redox Reactions
VO2++MnO4 V(OH)4++Mn2+(acidic)
Answer:
MnO4- + 5 VO +2 + 11 H2O = 5 V(OH)4+ + Mn+2 + 2 H+
Explanation:
The balanced redox reaction is MnO⁴⁻ + 5 VO⁺² + 11 H₂O = 5 V(OH)⁴⁺ + Mn+2 + 2 H⁺.
What are redox reactions?Redox reactions are those reactions in which there is the transfer of electrons between different elements. These reactions are of two types, oxidation and reduction reactions. Examples are combustion, displacements, corrosion, and rusting reactions.
An example of a chemical reaction in which one or more electrons are lost is an oxidation reaction.
A reduction reaction is one in which one or more electrons are acquired during a certain kind of chemical reaction.
The formation of hydrogen fluoride is a redox reaction.
H₂ + F₂ = 2HF
H₂ = 2H + 2e⁻
F₂ + e⁻ = 2F⁻
Thus, the reaction is MnO⁴⁻ + 5 VO⁺² + 11 H₂O = 5 V(OH)⁴⁺ + Mn+2 + 2 H⁺.
To learn more about redox reactions, refer to the link:
https://brainly.com/question/13293425
#SPJ2
Human impact on the environment is often more dramatic than the impact of most other living things because humans have a greater
A. Need for water
B. Need for food
C. Need for air
D. Ability to filter water
E. Ability to adapt to change
F. Ability to alter the environment
Human impact on the environment is often more dramatic than the impact
of most other living things because humans have a greater ability to alter
the environment.
Human beings are usually in control of most of the resources on earth such
as plants, animals, etc. Humans have developed new technologies for doing
things which have an impact on the environment.
Deforestation, burning of fossil fuel in automobiles and industries emits toxic
gases which have been found to alter the environment more than other
living things.
Read more about Human environmental impact on https://brainly.com/question/10415027
