Answer:
2.89 × 10²⁴ particlesExplanation:
The number of particles can be found by using the formula
N = n × L
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is 6.02 × 10²³ entities
We have
N = 4.8 × 6.02 × 10²³
We have the final answer as
2.89 × 10²⁴ particlesHope this helps you
Night visin cameras are sensitive to energies around 2.21 x 10-19 J. What wavelength of electromagnetic radiation do they use?
Answer:
8.99×10^-7m
Explanation:
The wavelength can be calculated using the expression below
E=hcλ
Where E= energy= 2.21 x 10^-19 J.
C= speed of light= 3x10^8 m/s
h= planks constant= 6.626 × 10^-34 m2 kg / s
E=hcλ
λ= E/(hc)
Substitute for the values
λ=( 2.21 x 10^-19 )/(6.626 × 10^-34 × 3x10^8 )
= 8.99×10^-7m
Answer:
Look at the explanation this one is hard
Explanation:
show your work:
E = hc/ λ
E λ = hc
λ = hc/E
λ = 6.626 x 10^-34 x 3 x 10^8 / 2.21 x 10^-19
=
8.994 x 10-7 m or 899.4 nm
800nm – 3mm is the range of wavelengths for infrared waves.
Night vision cameras use infrared waves.
How does the energy in chemical bonds affect the energy in a chemical reaction?
Answer:
Is by comparing the energy absorbed when bonds in the reactants are broken with the energy released when bonds in the products are formed, you can determine whether a chemical reaction releases energy or absorbs energy overall. Chemical reactions that release energy are called exothermic
How many moles are in 24.3g of iron (II) oxide?
Mark me Brainliest..... ......
What do polar bonds share with electrons?
Answer:
Polar Covalent Bonds. A polar covalent bond exists when atoms with different electronegativities share electrons in a covalent bond. Consider the hydrogen chloride (HCl) molecule. Each atom in HCl requires one more electron to form an inert gas electron configuration.
Explanation:
10 points. Any help is appreciated.
Answer:
I dont see the image
Explanation:
pls make it close up
(1) We are sorry to say that we will not be able to publish your short story "Max versus the Robots in the school literary magazine. (2) Our editorial board enjoyed the story's creative setting and interesting characters. (3) However, the board ultimately decided that the plot was too confusing, and several members found the ending to be implausible. (4) In addition, some readers were concerned that the technical details about robots were totally boring. (5) Although we have to reject this story, we hope to publish your work in the future, so please submit a story to us again. Which option best revises this paragraph to maintain a formal tone throughout? (T) A. Replace sentence 4 with: In addition, some readers were concerned that the technical details about robots would not be of interest to most students. B. Replace sentence 2 with: The creative setting was enjoyed by the board, and the interesting characters were appreciated bynbe board as well! c. Replace sentence 5 with: While it is with great regret that we must rebuff your literary endeavor, we would like to disseminate a future opus penned by you If you would be so kind as to dispatch an additional work to us for our consideration. 0 D. Replace sentence 3 with: But the editorial board ultimately decided that the plot was too confusing, and several members had no clue what the deal was with the ending,
B.
Replace sentence 4 with: In addition, some readers were concerned that the technical details about robots would not be of interest to most students.
Explanation:
i just did the test
Answer:
It's B.
Explanation:
How many particles are in 0.55 mil NaCl?
Answer:
2 atoms
Explanation:
1. Does warm air rise or sink? Does cold air rise or sink?
2. Air pressure can be high or low. Does air flow from low to high pressure or from high to low pressure?
3. Which is heavier—warm air or cold air?
4. Which has higher air pressure—warm air or cold air? How do you know?
5. Global circulation cells occur because of uneven heat distribution and the earth's rotation. What do we call the effect of the earth's rotation on air circulation?
Answer:
1. Hot air rises and cold air descends for exactly the same reason
Matter are anything that is made up of atoms. The quantity of matter can be seen only on the basis of mass and volume calculation. Therefore, warm air rise and cold air sink.
What is matter?Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science.
Matter is anything that is made up of atoms. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter.
Warm air rises while cold air descends. This is because hotter air takes more energy than cooler air. Furthermore, hot and cold temperatures are precisely proportionate to their density. As a result, when it's really hot, the hotter air is more likely to rise than when it's very cold.
Therefore, warm air rise and cold air sink.
To learn more about matter, here:
https://brainly.com/question/4562319
#SPJ2
Un elemento tiene 3 orbítales desapareados y presenta 3 niveles de
energía. ¿A qué grupo y período peretenece?
a) IIIA, 3 b) IIIB, 3 c) VIA, 3 d) VB, 3 e) VA, 3
PLS help its not that hard but I don't understand it. Its science not chemistry but they don't have science.
In this activity, you will construct two solar ovens and use thermometers to determine which oven gets the hottest. What engineering problem are you trying to solve?
Answer:
Conservation of resources. Saving energy and helping reduce carbon emission.
Explanation:
Explain why is it a good idea for the eco-house to have both a wind turbine and solar panels?
Answer:
Explanation:
Wind is more of an efficient power source than solar. Compared to solar panels, wind turbines release less CO2 to the atmosphere, consume less energy, and produce more energy.
3. At 10.0°C and 2.00 atm, the volume of the gas is 75.0 mL. If the temperature of the gas increases to
35.0°C and the pressure decreases to 1.00 atm, what is the new volume?
a. 1630 mL
b. 138 ml
c. 163 mL
d. 0.0017mL
Explanation:
c.
[tex]from \\ \frac{P _{1} V _{1} }{T _{1}} = \frac{P _{2} V _{2}}{T _{2}} \\ \frac{2 \times 75}{(10+273)} = \frac{V _{2} \times 1}{(35+273)} \\V _{2} = \frac{2 \times 75 \times (35+273)}{(10+273) \times 1} \\ V _{2} = 163 \: ml[/tex]
FIRST GETS BRAINLIEST (THE ONE THAT IS CORRECT)
A generator changes (Mechanical, Electrical, Static) energy into
(Mechanical, Electrical, Magnetic) energy.
Answer:
mechanical energy to electrical energy
Explanation:
The water turns the turbine with produces mechanical energy so the generator converts it to electrical energy
What TWO things decide the amount of kinetic energy an object can have?
Answer:
Mass SpeedExplanation:
The energy transferred is known as kinetic energy, and it depends on the mass and speed achieved. Kinetic energy can be transferred between objects and transformed into other kinds of energy. Additionally, The faster an object moves, the more kinetic energy it has. The more mass an object has, the more kinetic energy it has.
Which of the following statements is true about acids?
A. Acids taste sour.
B. Acids conduct electricity when dissolved in water.
C. Acids turn blue litmus paper red.
D. Acids donate protons or H+ ions.
E. All of the Above
Answer:
It's (D)
Explanation:
Most acids taste sour, conduct electricity when dissolved in water, turn blue litmus
Most acids taste sour, conduct electricity when dissolved in water, turn blue litmuspaper red, but not all of them. Some acids taste bitter, others sweet and some simply delicious.
Most acids taste sour, conduct electricity when dissolved in water, turn blue litmuspaper red, but not all of them. Some acids taste bitter, others sweet and some simply delicious.Silicic acid is tasteless, is not soluble in water, does not conduct electricity, does not turn blue
Most acids taste sour, conduct electricity when dissolved in water, turn blue litmuspaper red, but not all of them. Some acids taste bitter, others sweet and some simply delicious.Silicic acid is tasteless, is not soluble in water, does not conduct electricity, does not turn bluelithmus paper red, since it merely does not dissociate in water. The only correct option is D
How many different elements are there in 4AgNO3
Answer:
bobo ang brainly
Explanation:
kasi hindi nya binibigay a ng tamang question
Se mezclan por error 70 mililitros de solución de HCl 0.5 Normal con 250 mililitros de solución de hidróxido de sodio 0.30 normal. Calcular: El volumen final de la solución resultante El carácter de la solución resultante La concentración final de la solución resultante El pH de la solución resultante El valor del pOH de la solución resultante
Answer:
asxrsse367721479009qqucinübjpnpnfzdh ilo h
A hydrate of copper (II) chloride, CuCl2∙nH2O, is heated until the mass of the anhydrate remains constant at 19.72 g, indicating a loss of 5.32 g of water. How many moles of water are present for each mole of salt in the original hydrate? (Find n.)
Answer:
n = 2
Explanation:
To solve this question we must find the moles of the anhydrate CuCl2 (Obtained from the mass of 19.72g) and the moles of water (Obtained from the 5.32g):
Moles CuCl2 -Molar mass: 134.45g/mol-
19.72g * (1mol / 134.45g) = 0.14667 moles
Moles H2O -Molar mass 18.01g/mol-
5.32g * (1mol / 18.01g) = 0.2954 moles
The ratio of moles of H2O:CuCl2 is:
0.2954 moles / 0.14667moles = 2.0
That means n = 2 and the formula is:
CuCl2∙2H2O
Explain why a solid expands when is is heated
Answer:
When a solid object is heated, it expands. This happens because the atoms in the object start vibrating or moving faster.
Explanation:
If you need a longer explanation, let me know! If not, I hope I helped.
Because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans ____.
A.increases
B.doubles
C.remains balanced
D. decreases
Answer: Because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans remains balanced.
Explanation:
When evaporation takes place in sea water then of course there will occur an increase in salinity.
But as this evaporated water is replaced by water coming from rivers. As a result, the raising salinity is counter balanced by the water coming from rivers.
Hence, salinity remains balanced in sea water.
Thus, we can conclude that because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans remains balanced.
Based on the electron configuration of the two atoms, predict the ratio of metal cationic (+) atom to nonmetal anionic (-) atom in the compound. sodium and bromine
Answer:
A. 1:1
Explanation:
The ratio of metal cationic (+) atom to nonmetal anionic (-) atom in the sodium and bromine compound is 1:1 because sodium needs to lose one electron and bromine needs one electron to become stable and complete its outermost shell. When sodium lose electron, it become cation and gain +1 charge while on the other hand, the bromine accept one electron and become anion and gain -1 charge so that's why we can say that there is 1:1 of metal cationic (+) atom to nonmetal anionic (-) atom in the sodium and bromine compound.
How does H3PO ionize in water ?
Are these done correctly ?
HNO3 → H + NO3
H2SO4 → H2 + SO4
Answer:
H3PO4 + H2O ↔ [tex]H^{+}[/tex] + [tex]H2PO4^{-}[/tex]
Explanation:
HNO3 → NO2 + H2O + O2
H2SO4 → SO3 + H2O + O2
balance this equation:
AsCl3(aq) +__H2S (aq)--> __As2S3(s) + ___HCl (aq)
El metal Mg reacciona con el Hcl para producir gas Hidrógeno Mg +2HCl---MgCl2 + H2. ¿Qué volumen en Litros de H2 en condiciones STP se liberan cuando reaccionan 8.25g de Mg? * 8.60L 6.60L 7.60L 16.60L
Answer: 7.60 L of hydrogen gas will be liberated.
Explanation:
The number of moles is defined as the ratio of the mass of a substance to its molar mass.
The equation used is:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)
Given mass of Mg = 8.25 g
Molar mass of Mg = 24.305 g/mol
Plugging values in equation 1:
[tex]\text{Moles of Mg}=\frac{8.25g}{24.305g/mol}=0.340mol[/tex]
The given chemical equation follows:
[tex]Mg+2HCl\rightarrow MgCl_2+H_2[/tex]
By the stoichiometry of reaction:
If 1 mole of magnesium produces 1 mole of hydrogen gas
So, 0.340 moles of magnesium will be produce = [tex]\frac{1}{1}\times 0.340=0.340mol[/tex] of hydrogen gas
At STP conditions:
1 mole of a gas occupies 22.4 L of volume
So, 0.340 moles of hydrogen gas will occupy = [tex]\frac{22.4L}{1mol}\times 0.340mol=7.60L[/tex] of hydrogen gas
Hence, 7.60 L of hydrogen gas will be liberated.
What type of reaction occurs without the addition of heat?
Answer:
A
Explanation:
A spontaneous reaction doesn't require any addition of heat.
The rest of the choices require a transfer of heat energy.
What do faults mean? I can see if people write it on goo gle btw.anddddddf short answers only please
Answer:
faults are wrong or disallowed options or suggestions.
What is the empirical
formula for a compound that is 69.8% Fe
and 30.2% 0?
Answer:
Fe2O3
Explanation:
PLS HELP NO LINKS PLS
What percentage of stars do Kepler scientists suggest host Earth size planets?
10.2%
2.6%
5.4%
15.9%
so the other guy can have branliest have a wonderful summer guys! :)
Submit two compounds that will correspond to the unknown compound in the equation.
why are cells called the smallest functional unit of a living organism?