Answer:
becuase of the sun
in different places some places would be cold
How many protons does isotope of carbon- 14 atom have
Answer:
Number of protons in Carbon - 14 atom [tex]6[/tex]
Explanation:
The atomic number of carbon 14 atom is [tex]14[/tex]
Number of neutrons in the nucleus of Carbon-14 atom [tex]= 8[/tex]
Atomic number is equal to the sum of neutrons and protons
Number of protons in Carbon - 14 atom [tex]= 14 -8 = 6[/tex]
g 8. A hydrogen atom is initially a rest and in the ground state. A proton with kinetic energy 1000 eV scatters off the atom. In the process the hydrogen atom is ionized. The kinetic energy of the ionized electron is measured to be 15.2 eV and the kinetic energy of the proton produced from the ionization of hydrogen is 4.3 eV. What would be the final kinetic energy of the projectile proton after the collision
Answer:
Explanation:
Ionization energy of hydrogen atom is 13.6 eV . This energy will be provided by energetic proton , the kinetic energy of which is 1000 eV. The kinetic energy of ionized electron is 15.2 eV . Kinetic energy of proton produced from from the ionization of hydrogen or the nucleus of the hydrogen atom is 4.3 eV . All these energy must have come from kinetic energy of initial proton.
So kinetic energy of projectile proton after collision
= 1000 - ( 13.6 + 15.2 + 4.3 ) eV.
= 966.9 eV .
Solder is a silver metal used to hold pipes together. When the solder is heated, it melts and acts as a type of metal "glue." Mrs. Hanley heats a piece of solder until it melts between two pipes. What best identifies the point at which a physical change first takes place?
A)when the solder melts
B)when the solder cools down
C)when the solder is a soft metal
D)when the solder becomes solid again
Answer:
A
Explanation:
ammonia gas occupies a volume of 57.9 L at a pressure of 532.4atm. if the pressure were lowered to 256.8atm,what would the new volume be
Answer:
683838447745 anmmlllkkkkk
If 5.025 grams of NaOH are dissolved in 2.4 liters of water, what is the Molarity of the solution?
Answer:
0.052 M.
Explanation:
Hello!
In this case, since the molarity is computed by dividing the moles of the solute by the volume of the solution in liters (M=n/V), we first need to compute the moles in 5.025 grams of NaOH as shown below:
[tex]n=5.025g*\frac{1mol}{40.0g}\\\\n=0.126mol[/tex]
In such a way, we compute the molarity as show below:
[tex]M=\frac{0.126mol}{2.4L}\\\\M=0.052M[/tex]
Best regards!
What is the Noble gas electron configuration of lead (Pb)?
What will be the volume occupied by 100 grams of oxygen gas
at STP?
Answer:70L
Explanation:
The volume occupied by 100g of oxygen gas at STP is 70L.
1 mole of a gas at STP occupies 22.4 L volume.
The same goes for oxygen gas, [tex]O_2[/tex]. 1 mole of [tex]O_2[/tex] occupies 22.4L volume.
Now the molar mass of [tex]O_2[/tex] is = 32g
So the number of moles of [tex]O_2[/tex] in 100g is
n = 100/32
n = 3.125 moles
Volume occupied by 3.125 moles or 100g of [tex]O_2[/tex] is
V = 3.125 × 22.4 L
V = 70 L volume is occupied by 100g of oxygen gas.
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A substance has a mass of 22g and a volume of 13cm3. What is the density of the
substance? *
Answer:
1.69 g/cm³
Explanation:
Mass (m) = 22 g
volume (v) = 13 cm³
density (d) = ?
we know density is defined as mass per unit volume
d = m/v
= 22 / 13
= 1.69 g/cm³
Hope it will help :)
Due to changes in the environment, having lighter-colored fur becomes a
survival advantage in a population of wolves.
What is most likely to happen in the next generation?
Answer:
There will be more light-colored wolves.
Explanation:
Evolution is based off the survival of those with the most advantages in the wild. Since their light coat gives them a survival advantage, they will reproduce more.
I’m stuck on number 2
This person is fishing in a small, freshwater body of water. This body of water flows into a larger body of water called a river. What is this small body of freshwater called?
Answer:
Explanation:
The smallest body of water is the brook, a natural stream of water that is found aboveground and is often called a creek as well. A brook is usually a tributary (a small body of water that naturally flows into a large one) of a river, but this is not always the case.
Answer:
pond
Explanation:
The representative particle for NaF
Answer:
Na2S, it is the formula unit
Explanation:
The representative particle of CO2 is the molecule, while for Na2S, it is the formula unit
What is weather?
a
The atmospheric conditions over many days, weeks, months, and years.
b
The atmospheric conditions for a particular moment in time.
c
The atmospheric conditions forecasted for the next season.
as a rollercoaster goes downhiQuestion 2 options:
kinetic energy is converted into potential energy
potential energy is converted into kinetic energy
electrical energy is converted into potential energy
potential energy is converted into electrical energy
ll
Answer:
b potential hope this is right
How many moles are in 568 grams of Gold?
What is the rate of reaction
Answer:
The reaction rate is defined as the amount of substance that is transformed into a given reaction per unit volume and time.
How many atoms of which elements are represented by the following formula?
H3PO4
Why do not all rock types contain fossils?
Excessive heat and pressure can destroy fossils.
Fossils can only be created in certain places around the world.
Fossils cannot be created near volcanoes.
Fossils are too large to be found in igneous and metamorphic rocks.
Answer:
Igneous rocks form from molten rock, and rarely have fossils in them. Metamorphic rocks have been put under great pressure, heated, squashed or stretched, and fossils do not usually survive these extreme conditions. Generally it is only sedimentary rocks that
Explanation:
Hope it helps, some how.
Your welcome :)
1) How many moles of water does 6.02 x 1023 molecules
represent?
Answer:
1.00 mol
Explanation:
Step 1: Given data
Molecules of water: 6.02 × 10²³ molecules
Step 2: Calculate the number of moles corresponding to 6.02 × 10²³ molecules of water
In order to convert molecules to moles, we need a conversion factor. In this case, we will use Avogadro's number: there are 6.02 × 10²³ molecules in 1 mole of molecules.
6.02 × 10²³ molecules × 1 mol/6.02 × 10²³ molecules = 1.00 mol (we keep 3 significant figures)
A balloon with a volume of 0.5L at 293K is cooled to 20K. What is the balloon's new
volume?
Answer:
0.03 L
Explanation:
Step 1: Given data
Initial volume of the balloon (V₁): 0.5 LInitial temperature of the balloon (T₁): 293 KFinal volume of the balloon (V₂): ?Final temperature of the balloon (T₂): 20 KStep 2: Calculate the final volume of the balloon
The balloon is filled with air. If we assume it behaves as an ideal gas, we can calculate the final volume of the balloon using Charles' law.
V₁/T₁ = V₂/T₂
V₂ = V₁ × T₂/T₁
V₂ = 0.5 L × 20 K/293 K = 0.03 L
Kinetic energy is energy stored in an object due to its position.
True
Or
False
Answer:
[tex]\boxed {\boxed {\sf False}}[/tex]
Explanation:
Kinetic energy is the energy of movement or energy at work. An example is a ball rolling down a hill.
Potential energy is stored energy due to the position of an object. For example, a ball resting at the top of a hill.
The question incorrectly described potential energy as kinetic energy. Therefore, the answer is false.
What is the concentration of sodium ions in 0.185 M Na2CO3?
Answer:
0.370 M
Explanation:
Step 1: Given data
Molar concentration of the sodium carbonate solution: 0.185 M
Step 2: Write the balanced dissociation equation
Sodium carbonate is a strong electrolyte that dissociates according to the following equation.
Na₂CO₃(aq) ⇒ 2 Na⁺(aq) + CO₃²⁻(aq)
Step 3: Calculate the molar concentration of sodium ions
The molar ratio of Na₂CO₃ to Na⁺ is 1:2.
0.185 mol Na₂CO₃/L × 2 mol Na⁺/1 mol Na₂CO₃ = 0.370 mol Na⁺/L
Where is the main asteroid belt in the solar system?
Answer:
It's between Jupiter and Mars.I need help ASAP pls the last question
Answer:When more gas particles enter a container, there is less space for the particles to spread out, and they become compressed. ... The particles exert more force on the interior volume of the container. This force is called pressure.
Explanation:
Which element is malleable and ductile?
A. Phosphorus
B. Argon
C. Sodium
D. Chlorine
Can you help me answer all of these I’ll mark brainliest
Answer:
C.) Sodium
Explanation:
Sodium is an "Alkali Metal"
All of the following have an OCTET of electrons except
о
S-1
O
N-3
O
Be+2
O
Br-1
Answer:
full octets live in noble gas world so you need to be whatever your charge is away from there in steps on the periodic table so s-1 is the one that falls short as it is 2 moves away from Ar which is its closest Noble gas
Explanation:
NEED HELP ASPA WILL MAKE THE BRAINIEST ANSWER
A student captures 0.50
moles of hydrogen (H2), oxygen (O2), chlorine (Cl2), carbon dioscide (CO2), and carbon monoxide (CO) gas in separate, evacuated flasks.
Arrange the flasks of gases in order of increasing grams of gas.
.H
H
H2
H2
Answer: [tex]H_2[/tex] < [tex]CO[/tex] < [tex]O_2[/tex] < [tex]CO_2[/tex] < [tex]CL_2[/tex]
Explanation:
According to avogadro's law, 1 mole of every substanceweighs equal to its molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
1. Mass of [tex]H_2=moles\times {\text {Molar mass}}=0.50moles\times 2g/mol=1g[/tex]
2. Mass of [tex]O_2=moles\times {\text {Molar mass}}=0.50moles\times 32g/mol=16g[/tex]
3. Mass of [tex]Cl_2=moles\times {\text {Molar mass}}=0.50moles\times 71g/mol=35.5g[/tex]
4. Mass of [tex]CO_2=moles\times {\text {Molar mass}}=0.50moles\times 44g/mol=22g[/tex]
5. Mass of [tex]CO=moles\times {\text {Molar mass}}=0.50moles\times 28g/mol=14g[/tex]
Thus the flasks of gases in order of increasing grams of gas is:
[tex]H_2[/tex] < [tex]CO[/tex] < [tex]O_2[/tex] < [tex]CO_2[/tex] < [tex]CL_2[/tex]
How many particles are in 1.43 g of a compound with a molar mass of 233? (No molar mass calculation needed) (show work plz)
Answer:
Explanation:
mol = given mols / molar mass
given mass = 1.43 grams
molar mass = 233
mols = 1.43 / 233 = 0.00614
1 mol contains 6.02 * 10^23 particles
0.00614 moles = x Cross multiply
1*x = 0.00614 * 6.02*10^23
x = 3,68 * 10^21 particles.
This is IXL pls hurry pls! SOS major
Answer:
the same as
Explanation:
that's what makes the most since to me but i may be wrong
lobal wind patterns have less to do with air temperature than local winds. A True B False
Answer:
False
Explanation:
Depends mostly on heating of the earths surface being uneven
It is false that global wind patterns have less to do with air temperature than local winds.
What is global wind?Local winds are those that blow over a small area. Local geography, such as proximity to an ocean, has an impact on them.
Monsoons and land and sea breezes are among them. Global winds occur in belts all over the world.
Temperature differences, particularly the difference in heating at the equator and poles, and the Earth's rotation determine the global atmospheric circulation pattern.
By transporting heat and water, winds shape regional climate and influence daily weather.
Global winds are winds that occur in belts that circle the globe. Global winds, like local winds, are caused by uneven heating of the atmosphere.
Because of the Coriolis effect, winds blow diagonally across the surface.
Thus, the given statement is false.
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