What is the highest main energy level of Cl? How many inner shell electrons does Cl have?
Answer:
The highest energy level in which you would find electrons in a ground state chlorine atom is the third energy level.
Explanation:
The highest energy level in which you would find electrons in a ground state chlorine atom is the third energy level.
one product is lead iodide. The other product is ___.
Answer:
potassium nitrate
Explanation:
Answer:
Potassium Nitrate
Explanation:
Edge 2021
4 Which form of energy is stored in this
container?
(F) chemical energy
o electrical energy
(I kinetic energy
I sound energy
Answer: (F) chemical energy
Explanation:
when telling the steps in a scientific investigation, they should be relayed in such a way that the audience _______ .
Answer: Im pretty sure its C. or can exactly replicate the procedure
Explanation:
Answer:
it's c I took the test on my but
What is an electron configuration?
Answer:
Electronic configuration, also called electronic structure, the arrangement of electrons in energy levels around an atomic nucleus.
Answer:
In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals
Explanation:
:) hope it helps! have a good day
Which factor can increase the potential energy of an object?
Decrease in speed
Decrease in density
Increase in temperature
Increase in height from the ground
Answer:
Increase in height from the ground.
Explanation:
Potential energy =mass×acceleration due to gravity×height.
P.E= mgh
Weather includes such conditions as air pressure, wind, _____, and moisture in the air.
Answer:
Weather includes such conditions as air pressure, wind, temperature , and moisture in the air.
What is the molar volume of a gas at standard temperature and pressure? 1.0L, 2.4L, 11.2L 22.4L
A sample of nitrogen in a rigid container that is originally at 25.0°C and 98.0 kpa is heated until the pressure is 177 kpa. What is the final temp in Kelvin, in degrees celsius
The final temp : 538.2 K = 265.2 °C
Further explanationGiven
Temperature : 25 + 273 = 298 K
Initial Pressure = 98 kPa
Final pressure = 177 kPa
Required
The final temp
Solution
Gay Lussac's Law
When the volume is not changed, the gas pressure is proportional to its absolute temperature
[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]
Input the value :
T₂=(P₂.T₁)/P₁
T₂=(177 x 298)/98
T₂=538.2 K
An element whose atoms have the electron configuration 2-8-18-1 is
А
a transition element
B
a noble gas
an alkali metal
D
an alkaline earth metal
Answer:
A transition element atomic number 29 copper Cu
Explanation:
The air at the top of Mount Everest has pressures of 201.0 torr N2, 50.0 torr O2, 2.0 torr Ar, and 0.5 torr CO2. What is the total air pressure at the top of the highest peak in the world? Show all work to receive full credit.
Answer:
The total air pressure at the top of the highest peak in the world is 253.5 torr
Explanation:
The partial pressures of the gases present at the top of Mount Everest are;
Nitrogen, N₂ = 201.0 torr
Oxygen, O₂ = 50.0 torr
Argon, Ar = 2.0 torr
Carbon dioxide, CO₂ = 0.5 torr
By Dalton's law of partial pressure, the total pressure that a mixture of gases exerts is equal to the sum of the partial pressures of the individual gases
Mathematically, the law can be expressed as follows;
Total pressure, P = ∑P[tex]_i[/tex] = P₁ + P₂ + · · ·
From which we have;
The total air pressure at the top of the highest peak in the world, Mount Everest, [tex]P_{Total Mont Everest}[/tex] = The sum of the partial pressures of N₂, O₂, Ar, and CO₂
[tex]P_{Total Mont Everest}[/tex] = 201.0 torr + 50.0 torr + 2.0 torr + 0.5 torr = 253.5 torr
[tex]P_{Total Mont Everest}[/tex] = 253.5 torr = 0.33355263 atmosphere
Therefore, the total air pressure at the top of the highest peak in the world, [tex]P_{Total Mont Everest}[/tex] = 253.5 torr
The total air pressure at the top of the highest peak in the world is 253.5 torr.
What is Dalton's Law?Dalton's law of gases states that total pressure of any mixture of gases is equal to the sum of the partial pressures of individual gases.
Given that,
Partial pressure of Nitrogen gas = 201 torr
Partial pressure of Oxygen gas = 50 torr
Partial pressure of Argon gas = 2 torr
Partial pressure of Carbon dioxide gas = 0.5 torr
Total pressure at the top = 201 + 50 + 2 + 0.5 = 253.5 torr
Hence total pressure is 253.5 torr.
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Question 1 (1 point)
Use coefficients to balance the following reaction:
Na + 02 → Na20
Blank 1:
Blank 2:
Blank 3:
Answer:
Blank 1: 4
Blank 2: 1
Blank 3: 2
Explanation:
The unbalanced reaction expression is given as:
Na + O₂ → Na₂O
Now, we use a mathematical approach to balance the reaction given above.
Assign coefficients a , b and c for the blanks:
aNa + bO₂ → cNa₂O
Conserving Na : a = 2c
O: 2b = c
So, let c = 1, a = 2 and b = [tex]\frac{1}{2}[/tex]
Multiply through by 2;
a = 4, b = 1 and c = 2
4Na + O₂ → 2Na₂O
Blank 1: 4
Blank 2: 1
Blank 3: 2
Select the correct location on the image.
In pea plants, white seed coat is a recessive trait and gray seed coat is a dominant trait. Which offspring have a white seed coat?
Answer:
f2 4 answer. GG its right.
Explanation:
Answer:
hey the answer is in box f2 gg
Explanation:
What are the disadvantages of using nonrenewable energy resources?
They are readily available.
They are harmful to the environment.
There is only a certain amount of each source.
They are easy to extract from the earth.
A compound has an empirical formula of SO3 and a molecular mass of 152. What is the molecular formula?
Answer:
Molecular formula = S₂O ₆
Explanation:
Given data:
Empirical formula = SO₃
Molecular formula = ?
Molecular mass = 152 g/mol
Solution:
Molecular formula = n (empirical formula)
n = molar mass of compound / empirical formula mass
Empirical formula mass = 80 g/mol
n = 152 g/mol / 80 g/mol
n = 2
Molecular formula = n (empirical formula)
Molecular formula = 2(SO₃)
Molecular formula = S₂O ₆
Help me thank you....
Answer:3
Explanation:
it is b
Answer:
The correct answer is . . . "B" .
♡ ( i just got the answer from that other dude- ) ♡
Explanation:
Please help me I’m struggling!!
I’ll mark brainliest!!
CHEMISTRY
Answer:
the 4th one
Explanation:
2NACL 2NA + CL2
Answer:
It's B, the previous answer is wrong
Explanation:
What are the variables for this piston? temperature only temperature and volume pressure and number of molecules volume and number of molecules
Answer:
Option 2: temperature and volume
Explanation:
took the test
Temperature and volume are the variables for this piston.
What is a temperature?Temperature is a measure of hotness or coldness
The volume of a gas is directly proportional to its absolute temperature. More specifically, for a fixed mass of gas at constant pressure, the volume (V) is directly proportional to the absolute temperature (T).
This is Charles' Law. V = kT, where k is a proportionality constant.
Hence, temperature and volume are the variables for this piston.
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What kind of reaction is shown below?
C8H18 → C2H4 + C6H14
a combustion
b double replacement
c composition
d decomposition
e single replacement
Answer:
d. decomposition
Explanation:
decomposition reaction is a reaction in which a compound breaks down into 2 or more substances.
the general form is: AB → A + B
Four animals were fleeing from a wildfire. All of them were running at a speed of 30 miles per hour. Which one has the greatest kinetic energy?
A Elephant
B) Dog
© Mouse
D) Ant
Answer: I don’t know lol
Explanation: I am so sorry I thought this was easy
Answer:
Ant.
Explanation:
The dog would be the most frantic, when all are compared at an equal speed of 30 mph. An ant of such strength, has six jointed legs and has an exoskeleton. An Ant of such size(mass) and weight would have take off with better traction too(6 legs). So the Ant would have the greatest kinetic energy. Also it would take turns while fleeing from the wildfire, while running at almost 30 mph while the other animals wouldn't come that close.
It is technically and literally illogical to say an ant can do 30 mph in its regular size.
Dont believe me? Watch ants scurrying away when threatened and taking turns and U-turns. Six legs offer more energy while fleeing by instinct. Literally six legs at 30 mph. Crazy!
HEY! Nicki Minaj is the queen of rap.
Answer:
O my OMG
Explanation:
Remember Nicki vs. Cardi
Helium is a colorless gas that does not react with other elements. Using what you know about valence electrons, which other elements would you expect to have similar properties as Helium? Explain.
Answer:
Neon, Argon, Krypton, Xenon and Radon
Explanation:
The other elements that would be expected to have similar properties as the Helium from the periodic table are the noble gases.
The noble gases are a special group of elements belonging to the last group of the periodic table.
They are called the O group or inert group because elements in this group do not combine with other atoms due to their completely filled outermost shell.
This makes them unreactive and do not readily combine with other atoms.
what evidence is there of energy release after chemical reaction
Answer:
loss of mass
Explanation:
your welcome :)
A box of groceries requires 5,0 newtons of force to lift it up 1.0 meter. How much work is done?
0.0 J
1.0 J
2.0 J
5.0 J
Please help I’ll give Brainliest
What causes valley air to move up surrounding mountains during the day?
The Sun warms the air in the valley more than it does the mountains.
The Coriolis Force moves the winds up the sides of hills and mountains.
The Sun warms the tops of hills and mountains more than it does the valley.
The valley air is denser because is of its lower elevation.
Answer:
so the third one
Explanation:
During the day, the sun heats up mountain air rapidly while the valley remains relatively cooler. Convection causes it to rise, causing a valley breeze. At night, the process is reversed. During the night the slopes get cooled and the dense air descends into the valley as the mountain wind.
Answer:
The Sun warms the tops of hills and mountains more than it does the valley.
Explanation:
which is larger Ca or Ca2+
Answer:
Ca
Explanation:
Ca is larger than Ca2+ because, in the periodic table, the atomic radius increases from top to bottom and from left to right. Also Ca has 2 more electrons than Ca2+ therefore, its atom is bigger because it has an extra shell.
Ca²⁺ is smaller than Ca. As Ca²⁺ has lost two electrons to become positively charged.
Ca²⁺ is the calcium ion, which has lost two electrons to become positively charged. When an atom loses electrons, it becomes smaller because there are fewer negatively charged electrons in the electron cloud to balance the positive charge of the nucleus.
On the other hand, Ca refers to the neutral calcium atom, which has an equal number of protons and electrons. In comparison to Ca²⁺, the neutral calcium atom has two additional electrons, which increases the electron cloud and overall size of the atom.
Therefore, Ca²⁺ is smaller than Ca.
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____ NaBr + ____ Ca(OH)2 ___ CaBr2 + ____ NaOH
Answer:
2 NaBr + 1 Ca(OH)2 ---> 1 CaBr2 + 2 NaOH
For something to be considered mechanical energy what has to happen? This may be the
most important idea to understand about mechanical energy
Answer:
Mechanical Energy - The Physics Classroom
Objects have mechanical energy if they are in motion and/or if they are at some position relative to a zero potential energy position (for example, a brick held at a vertical position above the ground or zero height position). A moving car possesses mechanical energy due to its motion (kinetic energy).
calculate the freezing point of 3.46 gram of a compound X in 160 gram of benzene when a separate sample of X was vaporized it's density was found to be 3.27 gram/liter at 116°c and 773 torr. The freezing point of pure benzene is 5.45°c of Kf=5.1°/m
Answer: The freezing point of 3.46 gram of a compound X in 160 gram of benzene is [tex]4.38^0C[/tex]
Explanation:
The relation of density and molar mass is:
[tex]d=\frac{PM}{RT}[/tex]
where
d = density = 3.27 g/ L
P = pressure of the gas = 773 torr = 1.02 atm (760 torr = 1atm)
M = molar mass of the gas = ?
T = temperature of the gas = [tex]116^0C=(116+273)K=389K[/tex]
R = gas constant = [tex]0.0821Latm/Kmol[/tex]
[tex]M=\frac{dRT}{P}=\frac{3.27g/L\times 0.0821Latm/Kmol\times 389K}{1.02atm}=102.3g/mol[/tex]
The relation of depression in freezing point with molality:
[tex]\Delta T_f=k_f\times m[/tex]
[tex]\Delta T_f[/tex] = depression in freezing point = [tex]T_f^0-T_f[/tex] = [tex]5.45-T_f[/tex]
[tex]k_f[/tex] = freezing point constant = 5.1
m = molality = [tex]\frac{\text {moles of X}}{\text {weight of solvent in kg}}=\frac{3.46\times 1000}{102.3\times 160}=0.21[/tex]
[tex]5.45-T_f=5.1\times 0.21[/tex]
[tex]T_f=4.38^0C[/tex]
Thus the freezing point of 3.46 gram of a compound X in 160 gram of benzene is [tex]4.38^0C[/tex]
From the information contained in the question, the freezing point of the solution is 4.38°C.
The molar mass of the compound can be obtained from;
M = dRT/P
Where;
d = Density of the gas = 3.27 gram/liter
R = molar constant = 0.082 atmL-K-1mol-1
T = Absolute temperature = 389 K
P = pressure = 773 torr or 1.02 atm
M = 3.27 gram/liter × 0.082 atmL-K-1mol-1 × 389 K/1.02 atm
M = 102.3 g/mol
Number of moles of X = 3.46 gram/102.3 g/mol = 0.034 moles
Molality of the solution = Number of moles of solute/ Mass of solution in kilograms = 0.034 moles/0.16 = 0.21 m
Using the relation;
ΔT = K m i
Where;
ΔT = Freezing point depression
K = Freezing constant = 5.1°C/m
m = molality of solution = 0.21 m
i = Van't Hoff factor = 1
ΔT = 5.1°C/m × 0.21 m × 1
ΔT = 1.07 °C
But;
ΔT = Freezing point of pure solvent - Freezing point of solution
Freezing point of solution = Freezing point of pure solvent - ΔT
Freezing point of pure solvent = 5.45°C
Freezing point of solution = 5.45°C - 1.07 °C
Freezing point of solution = 4.38°C
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What is the charge of an atom with 21 protons and 20 electrons?
Answer:
Positive
Explanation:
If an atom has more protons than electrons, its charge with be positive. Protons have a positive charge, and electrons have a negative charge.
