Answer:
4.1 atm = 3,116 mmHg = 415.4 kPa
Explanation:
According to Boyle's law, as volume is increased the pressure of the gas is decreased. That can be expressed as:
P₁ x V₁= P₂ x V₂
Where P₁ and V₁ are the initial pressure and volume respectively, and P₂ and V₂ are final pressure and volume, respectively.
From the problem, we have:
V₁= 50.0 L
V₂= 68.0 L
P₂= 3.0 atm
Thus, we calculate the initial pressure as follows:
P₁= (P₂ x V₂)/V₁= (3.0 atm x 68.0 L)/(50.0 L)= 4.08 atm ≅ 4.1 atm
To transform to mmHg, we know that 1 atm= 760 mmHg:
4.1 atm x 760 mmHg/1 atm = 3,116 mmHg
To transform to kPa we use: 1 atm= 101.325 kPa
4.1 atm x 101.325 kPa = 415.4 kPa
A 100.0 gram sample of water at 50.0oC is mixed with a 50.00 gram sample of water at 20.0oC. What is the final temperature of the 150.0 grams of water?
Answer:
35 °C is the final temperature.
Comment if you need step to step explanation.
A 100.0 gram sample of water at 50.0°C is mixed with a 50.00 gram sample of water at 20.0°C. 35 °C is the final temperature of the 150.0 grams of water.
What is temperature?The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature. Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points or thermometric substances.
The most popular scales are indeed the Celsius scale, sometimes known as centigrade, with the unit symbol °C, the Fahrenheit level (°F), as well as the Kelvin scale (K), with the latter being mostly used for scientific purposes. Among the seven units inside the International Units of Measure is the kelvin (SI).
Final temperature = (m₁×T₁×c₁ + m₂×T₂×c₂)/( T₁+ T₂)
= (100.0×50.0×4.18 + 50.00×20.0×4.18 )/( 50.0+ 20.0)
= 35 °C
Therefore, 35 °C is the final temperature of the 150.0 grams of water.
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Maceo is making rock candy. Which best describes the steps she should take? heat a saturated sugar water solution, dissolve more sugar, then let the solution cool heat a saturated sugar water solution, dissolve more sugar, and wait until the water evaporates saturate a water solution, increase the pressure, and dissolve more sugar saturate a water solution, lower the pressure, and dissolve more sugar
Answer:
(A) is the answer
Explanation:
(A) heat a saturated sugar water solution, dissolve more sugar, then let the solution cool
Answer:
the answer is a
Explanation:
im on edg rn
Describe 1 way process or system that transfers heat by convection. Be specific in details
1. Answer the
C.
i. Addition reaction
111. Displacement reaction.
i i ti on
a What is a chemical reaction? Mention its types.
b. Explain the following types of chemical reaction with one example
ii. Decomposition reaction
c. What are the conditions required for the decomposition reaction to
d. What is acid-base reaction? Why is it also called neutralization re
e. What is the chemical reaction in which the exchange of electrop
electronegative ions occurs in aqueous solution? Write one example
f, Explain why the double displacement reaction is also called
. What is the state of reactant and products like in the double decomposition
h. How does the application of heat increase the rate of a chemical reaction
i. What is the effect of the surface area of reactants on the rate of chemical:
In
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with examples.
a.
b. Ammo
Alumit
d. Coppe
e.
Magne
Calciu
g
Silver
h. Sulph
What happer
i. red m
iii. phos
V.
silve
vi. amm
vii. wate
ix. pota
X. carb
xii. lime
decomposition reaction.
ai
is
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Multi
Explain with examples.
i What is a catalyst? Write its type with examples.
k. Differentiate between
1. Positive catalyst and negative catalyst.
ii. Exothermic reaction and endothermic reaction.
2. Complete the following reactions and also mention their types.
i. Mg+
MgSO4+H
A
Caco, +
A
1. The pro
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ii. Ca (HCO3)2
iii. MgCO,
a. Balar
c. Word
2. The che
is calle
Answer:
Explained below
Explanation:
In a decomposition reaction, a substance (commonly a molecule) descomposes in the elements that originally formed it.
The standard formula is:
AB > A + B
In fact, is the opposite of a synthesis reaction.
An example of decomposition reaction is:
H2O > 2H + O
the energy level of the valence electrons in Nitrogen
Answer:
NITROGENValency = 3Atomic number = 7Electronic configuration consist
K = 2 , L = 5on the basis of sub shell
1s^2 , 2s^2 , 2p^3What is the difference between magnetic stripping and magnetic field reversal?
How many liters are in .0025 millililiters
Answer: 0.0000025 liters
1) What is the ground state electron configuration for Oxygen (O)?
2) What is the excited state electron configuration for Oxygen (O)
Help please
Answer:
1)Oxygen atoms have 8 electrons and the shell structure is 2.6. The ground state electron configuration of ground state gaseous neutral oxygen is [He]. 2s2. 2p4 and the term symbol is 3P2.
Explanation:
2)If the element were to become excited, the electron could occupy an infinite number of orbitals. However, in most texts the example will be the next available one. So for oxygen, it might look like this: 1s22s22p33s1 - where the valence electron now occupies the 3s orbital in an excited (i.e. not ground) state
(02.02 LC)
Which of the following is an example of chemical weathering?
Frost wedging
O Animal activity
Plant growth
O Acid rain
Answer: acid rain
Explanation: Acid rain is one way in which rocks can be chemically weathered. It can harm forests and crops, damage bodies of water, and contribute to the damage of statues and buildings. In this activity you will simulate the chemical weathering of limestone, which is a soft, sedimentary rock that reacts easily to acid rain.
It's important to remember that elements are
No, unless you're doing some sort of course where they demand that you do. It's useful to remember the general features of the periodic table (what each block is, where they are in relation to each other, roughly where the most common elements are), but memorizing the entire thing would simply be a mnemonic exercise
Hope this helped
Answer:
i used a vent to vented
Explanation:
What does electronegativity measure
If you could change one thing about distance learning, what would it be?
Answer:
Nothing
Explanation:
BECAUSE DONT ASK
where in texas are you most likely to find hoodoos ?
coastal plain
mountains and basins
great plains
north central plains
The ___ is the number of protons in the nucleus of an atom of an element.
Fill in the blank.
1) Which of the following is NOT a step in the scientific method *
Formulating a scientific question
Making Observations
Developing a hypothesis
Applying for a license
Answer:
applying for a license
Answer:
Applying for a license
Explanation:
This is because you have to have observations,hypothesis and a scientific equation when using The Scientific Method.
Type the correct answer in the box. Spell all words correctly. What is cogeneration? Cogeneration is a process of producing electricity and simultaneously.
Answer:
we need to see the answers-
Answer:
Heat
Explanation:
Just took the test, hope this helps!
What is the energy of a microwave photon that has a frequency of 9.86 x 1012 Hz?
Answer:
E = 65.37×10⁻²² J
Explanation:
Given data:
Energy of photon = ?
Frequency of photon = 9.86×10¹² Hz
Solution:
Formula:
E = h.f
Here h is planck's constant its value is 6.63×10⁻³⁴ js.
E = 6.63×10⁻³⁴ js × 9.86×10¹² Hz
Hz = s⁻¹
E = 65.37×10⁻²² J
The energy of photon is 65.37×10⁻²² J.
Which model of the atom was used as a result of JJ Thomson's cathode ray
experiments?
a. Plum pudding model
b. Nuclear model
C. Planetary model
d. Quantum mechanical model
Answer:
a. Plum pudding model
Explanation:
The plum pudding model of the atom was proposed by J.J. Thomson. It was the model he derived from his experiment on the gas discharge tube.
J.J Thomson was the first person to discover electrons which he called cathode rays because in the discharge tube, they emanate from the cathode.
This led him to suggest the plum pudding model of the atom. The model reflects electrons being surrounded by a volume of negative charges.You place 12.0 milliliters of water in a graduated cylinder. Then you add 15.0 grams of metal to the water and the new water level is 13.91 milliliters. What is the density of the metal in grams per milliliter?
Answer:
The answer is 7.85 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
volume = final volume of water - initial volume of water
volume = 13.91 - 12 = 1.91 mL
We have
[tex]density = \frac{15}{1.91} \\ = 7.853403141...[/tex]
We have the final answer as
7.85 g/mLHope this helps you
Answer:
Hello, Im Mack :)
Here is the Correct Solution for your question:
Answer is 7.85 g/mL
Explanation:
The density of a substance can be found by using the formula
-volume = final volume of water - initial volume of water
-volume = 13.91 - 12 = 1.91 mL
-Final Answer is: 7.85 g/mL
Hope this helped you out :)
Comment if you need further help, and I'll reply asap.
Have a great day my friend\ and best of luck to your studies :)
i need a person i can love and not get hurt
Answer:
You'll find someone. There's a someone for everyone.
Explanation:
And I know how you feel.
Describe in two-five-sentence paragraphs the characteristics a substance must have to be
considered a mineral.
Answer:
A Mineral can be identified if they have the following properties:
1) Naturally occurring: it should be present in nature on its own, steel is not a mineral because it is made manually.
2) Inorganic it should not be produced by any organism
3) Solid It should not be in liquid or gaseous state, water is not a mineral because its liquid.
4) Definite chemical composition it should have a limited variation in its chemical properties.
5) Ordered internal structure it should have definite internal repeating structure that does not varies much.
please help!! i don’t know what the heck im doing lol
Answer:
I can help you know how to mark the points.
For the first one point, if you look at the lines that go side to side, you need to find the line that is 20 degrees that's above the blue line. Next, if you look at the lines that go up and down, you need to find the line that is 30 degrees, but is to the right of the blue line. When you plot your point, it should somewhere along the coastline of Saudi Arabia.
For the second point, if you look at the lines that go side to side, you need to find the line that's 40 degrees that's below the blue line. Next, if you look at the lines that go up and down, you need to find the line that is 10 degrees that's to the left of the blue line. When you plot your point, it should be located somewhere in the South Atlantic Ocean.
For the third point, if you look at the lines that go side to side, you need to find the line that's 20 degrees that's below the blue line. Next, if you look at the lines that go up and down, you need to find the line that's 40 degrees that's to the right of the blue line. When you plot your point, it should be kind of located in the Indian Ocean, but not too far from Africa.
(Not too sure how accurate the instructions were, I haven't done longitude and latitude lines in a while)
Explanation:
Picture:
is the kinetic energy due to the random motion of particles in an object
Answer:
You are correct however there is also potential energy because the energy is released over a period of time.
Hope this helps!
How many elements are found in the following chemical equation? K + Cl → KCl
Answer:
2
Explanation:
True or false : An ion is a substance in which the atoms of two or more elements are combined in a fixed proportion
Answer:
The answer would be "True"
Discuss the molecules in solids, liquids and gases. Include how the molecules move, including the speed of the molecules and the
space between the molecules.
Answer:
Molecules in solids are tightly packed because the atoms are freezed together. Molecules in liquids are loosely packed because atoms are broken down and can move anywhere. Molecules in gases are free; the atoms can move or spread anywhere.
Solids do not move; hence no speed.
Liquids move and slide past past each other.
Gases move freely at high speeds
Which of the following is an electrolytic cell?
A. Silver (Ag) oxidized, gold (Au) reduced
B. Lithium (Li) oxidized, zinc (Zn) reduced
C. Aluminum (Al) oxidized, zinc (Zn) reduced
D. Iron(II) (Fe) oxidized, aluminum (AI) reduced
Iron (II) (Fe) oxidized, aluminium (Al) reduced. Hence, option D is correct.
What is an electrolytic cell?An electrolytic cell converts electrical energy into chemical energy or vice versa.
Oxidation-reduction reactions are balanced by two half overall chemical equations into an oxidation equation and a reduction equation.
Iron (II) (Fe) oxidized, aluminium (Al) reduced of the following is an electrolytic cell.
Hence, option D is correct.
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Suppose that an electron starts in the n=4 shell of a neutral hydrogen atom. How many photons will be emitted once it has fallen to the n=1 shell?
Answer: If an Atom has 12 Electrons then if it is a Neutral atom then the Atomic Number of the Atom will be 12.
The Electronic Configuration of Element with Atomic Number 12 will be :
⇒ 1s² 2s² 2p⁶ 3s²
We can notice from the Electronic Configuration that :
Given atom has 2 electrons in the 1st shell.
⇒ In the Shell : n = 1
Number of Electrons = 2
In the similar way : Number of Electrons in 2nd shell = 2 + 6 = 8
⇒ In the Shell : n = 2
Number of Electrons = 8
In the similar way : Number of Electrons in 3rd shell = 2
⇒ In the Shell : n = 3
Number of Electrons = 2
Explanation:
When an electron starts in the n=4 shell of a neutral hydrogen atom and once it has fallen to the n=1 shell, then 3 photons will be emitted.
What is emission of energy?If any electron is presnt in the highest energy shell of an excited atom and when comes back to the ground state then emission of energy takes place.
As we know that by the absorption of one photon, electron will goes on the succeding shell from the previous shell. Similarly when electron come back to the 3rd shell from the 4th shell of a hydrogen atom then 1 photon will emit, from 3rd to 2nd shell 2nd photon will emit and from 2nd to 1st shell 3rd photon will emit.
Hence 3 photons will be emitted once electron will fall into 1st shell from the 4th shell.
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What is the voltage of an electrolytic cell with zinc and aluminum electrodes?
O A. -2.44 V
B. -0.92 V
C. 2.44 V
O D. 0.92 V
From the calculation, the voltage of the electrolytic cell is -0.92 V
What is an electrolytic cell?An electrolytic cell is is cell that produces energy by a nonspontaneous chemical process. The anode of this cell is zinc while the cathode is aluminum.
The voltage of the cell is obtained from Ecathode - E anode = -1.66 V - (-0.74 V) = -0.92 V
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the correct electron-dot formula for a molecule of chlorine?
Answer:
Cl has 7 dots
if its Cl2; Cl-Cl it will contain 14 dots
Explanation:
The electron-dot formula of the chlorine molecule Cl₂is shown in the attached diagram below.
What is the lewis electron dot diagram?A lewis electron dot structure is used to represent the number of bonds, the bonding atoms, and the lone pairs left in the atoms in the molecule.
Lines are shown between atoms that are bonded to one another and excess electrons or lone pairs are represented as dot pairs and are placed next to the atoms.
As the valence electrons of each chlorine atom are equal to seven from the electronic configuration of the chlorine atom.
First, the total number of valence electrons in a chlorine molecule is 7 + 7 = 14.
As each chlorine atom needs only one electron to complete its octet. As the octet completes, the rest of the electrons are assigned as the lone pairs of atoms. Therefore, each chlorine atom has three lone pairs of electrons on it.
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