Answer:
A mole of horses would be Avogadro number of horses (a lot actually !). Avogadro number is 6.023 x 10(23). A mole of H (hydrogen) atoms contains 6.023 x 10(23) H atoms. A mole of H2 molecules contains 6.023 x 10(23) H2 molecules or 2 moles of H atoms (since each molecules has 2 atoms).
Explanation:
Answer:
A mole (mol) is the amount of a substance that contains 6.02 × 10 23 representative particles of that substance. The mole is the SI unit for amount of a substance. Just like the dozen and the gross, it is a name that stands for a number. There are therefore 6.02 × 10 23 water molecules in a mole of water molecules.
Explanation:
What is the molecule that formed between B and F?
Answer:
Hydrogen bond strengths range from 4 kJ to 50 kJ per mole of hydrogen bonds. In molecules containing N-H, O-H or F-H bonds, the large difference in electronegativity between the H atom and the N, O or F atom leads to a highly polar covalent bond (i.e., a bond dipole).
Explanation:
3. Which of the following is an example of a polyatomic ion?
a. NO
b. OP-
C. CI
d. Ca²+
Answer:D
Explanation:polyatomic means more then one and it have more then 1 positive ion
Using the electronegativity chart below, determine which compound would have the highest polarization
A. Li-O
B. B-F
C. H-CI
D. Be-Br
Answer:
A. Li-O
Explanation:
The highest polarization will occur between the atoms of Li-O because they have the most electronegativity difference between them.
Polarization occurs when there is a separation of charge between the atoms of heteronuclear molecules.
The electronegativity gives the tendency for an atom to attract the electrons within the bond pair to itself.
To know the atom with most polarization, it has to be one with highest electronegativity difference. Li and O have the highest difference. Also, since the bond is between a metal and non-metal, it is obviously the most polarized.
Airplanes typically fly at an altitude of about 10,000 meters. At this altitude the atmospheric pressure is significantly less than it is at sea-level. Because of this, airplane cabins must be pressurized so that the people on board can continue to get enough oxygen. If a typical 747 has a volume of 28,000 m3 and is filled with air at 101.3 kPa on the ground, what is the new volume of air inside when the cabin is pressurized to 75 kPa once it is in flight?
Answer:
37,818.67 m3
Explanation:
The pressure a gas will exert on a container is inversely proportional to the volume of the gas. According to Boyle's law, at a constant temperature, the pressure of a gas is inversely proportional to its volume. The law can be mathematically represented thus:
P1V1 = P2V2
In this case, P1 = 101.3 kPa, V1 = 28,000 m3, P2 = 75 kPa, V2 = ?
V2 = P1V1/P2
= 101.3 x 28,000/75
= 37,818.67 m3
Hence, the new volume of the air inside the cabin after pressurizing would be 37,818.67 m3.
how do you separate immiscible and miscible liquid
Answer:
A mixture of immiscible liquids is separated by using an apparatus called separating funnel. (i) Separation by fractional distillation : Fractional distillation is the process of separating two (or more) miscible liquids by distillation, the distillate being collected in fractions boiling at different temperatures.
Explanation:
hope this sorta helps you -.-
ANSWER ASAP please I need help thank you I’ll give you brainly
What is the standard cell notation of a galvanic cell made with silver (Ag) and
nickel (Ni)?
A. Ni2+(aq) | Ni(s) || Ag(s) | Ag+(aq)
B. Agt(aq) | Ag(s) || Ni(s) | Ni2+(aq)
C. Ag(s) | Ag+(aq) || Ni2+(aq) | Ni(s)
D. Ni(s) | Ni2+(aq) || Ag+(aq) | Ag(s)
Answer:
See the attached notation!
The two rate statements below are not the same. Use the concept of unit rates to explain
the difference.
a. LaVerne earns $10 in 2 hours.
b. Shirley earns $2 in 10 hours.
A recipe calls for 0.8 oz of cheese. If I make 35 batches of this recipe, how many ounces of cheese do I need?
Plants don't grow as well when ____ has been lost.
a.
clay
c.
parent rock
b.
topsoil
d.
slope
Answer
the answer is b
explanation
Answer:
b. topsoil
Explanation:
I just took the test
what's the molar mass of Li3p
Answer:
51.79g Li₃P.
Explanation:
Li has a molar mass of 6.94 g (since there are 3, you multiply it 3 times) and P has a molar mass of 30.97 g. 6.94(3) + 30.97 = 51.79g.
10.0 grams of a gas occupies 12.5 liters at a pressure of 42.0 mm Hg. What is the volume when the pressure has increased to 75.0 mm Hg? 6.72 L 7.00 L 22.3 L 0.143 L
Answer: 7.00 L
Explanation:
Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.
[tex]P\propto \frac{1}{V}[/tex] (At constant temperature and number of moles)
[tex]P_1V_1=P_2V_2[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 42.0 mm Hg
[tex]P_2[/tex] = final pressure of gas = 75.0 mm Hg
[tex]V_1[/tex] = initial volume of gas = 12.5 L
[tex]V_2[/tex] = final volume of gas = ?
[tex]42.0\times 12.5=75.0\times V_2[/tex]
[tex]V_2=7.00L[/tex]
Therefore, the volume when the pressure has increased to 75.0 mm Hg is 7.00 L
Temperature of boiling water cannot be measured by a
_____________ thermometer.
Answer:
Cannot be measured by pyrometer.
Explanation:
This is because a pyrometer measures temperatures for very hot bodies such as the sun.
Answer:
Clinical
Explanation:
Temperature of boiling water cannot be measured by a Clinical thermometer The reason behind this is that the range of clinical thermometer varies between only 35° C to 42° C.
What is the mass of hydrogen produced when 8.0 g of sodium
reacts with an excess of water to produce hydrogen and sodium
hydroxide? The equation is given.
2 Na + 2 H2O → 2NaOH + H2
Answer:
Mass = 0.35 g
Explanation:
Given data:
Mass of sodium = 8.0 g
Mass of hydrogen produced = ?
Solution:
Chemical equation:
2Na + 2H₂O → 2NaOH + H₂
Number of moles of sodium:
Number of moles = mass/molar mass
Number of moles = 8.0 g/ 23 g/mol
Number of moles = 0.35 mol
now we will compare the moles of sodium and hydrogen
Na : H₂
2 : 1
0.35 : 1/2×0.35 = 0.175 mol
Mass of hydrogen:
Mass = number of moles × molar mass
Mass = 0.175 mol × 2 g/mol
Mass = 0.35 g
How do the particies in a liquid create surface
tension?
It's been a while since I've taken Chemistry but here's what I know:
There are small, weak bonds that form between water molecules. These bonds make it so liquid molecules (water, in this example) cannot move as freely as a gas, but their bonds aren't nearly as strong as a solid. The bonds are formed when a hydrogen atom is attracted to an oxygen atom (because they have an opposite charge). This bond plus the gas molecules hitting the water causes surface tension.
(Let me know if this is wrong and I hope you have a lovely day!!)
b. How do metals and non-metals differ chemically?
1
In which material would the particles be closest together?
O Syrup
O Brick
O Air
O Water
Answer:
Brick
Explanation:
The distance between particles is best determined by density. So, to find which material has the most compacted particles, we need to find which material has the highest density. Solids will always have the highest densities, so Brick would have the particles that are closest together.
Which answer choice correctly lists only elements?
A
Cl, Na, CH3, Ne
B
Mg, NO2, Mg, B
C
H2O, Li, N, I2
D
N2, O2, Al, Zn
Group of answer choices
A
Answer:
D
Explanation:
Nitrogen^2, Oxygen^2, Aluminum, Zinc
the others have combination
What did you include in your response? Check all that
apply.
O No, thermal energy is not being transferred by
radiation in this image.
O The eggs are in direct contact with the metal pan,
which is in direct contact with the gas flame.
O Thermal energy is being transferred by conduction.
O Radiation transfers thermal energy by
electromagnetic waves.
O Radiation does not transfer thermal energy by
direct contact.
What is mass movement give examples
A solution is
Question 6 options:
a homogeneous mixture.
a compound.
chemically separable.
a heterogeneous mixture.
Answer:
the first one. a homogeneous mixture.
Explanation:
hope this helps :)
What is the unit for the answer?
23.67 boops
x
0.256 snoots
35 boops
Х
520. zoinks
Х
92 snoots
2
218 snoots
34 wout
Х
2
8765 wows
345 zoinks
boops
snoots
WOWS
zoinks
wows/snoots
boops/zoinks
Answer:Answer to: A function f is defined on the interval ~[0,4], and its derivative is { e^{sinx} - 2cos3x } a. on what interval is f increasing? b....
Missing
Explanation:
PLZ FASTLEY ANSWER The images show two metamorphic rock samples.
Left: light colored rock with coarse texture. Right: red and white rock with rounded grains and coarse texture.
Which statement accurately describes these rocks?
Both rocks are non-foliated.
Neither rock has randomly arranged grains.
Both rocks formed at Earth’s surface.
Neither rock formed through extreme heat or pressure.
Answer:
a
Explanation:
From the given images, it is clear that both rocks are non-foliated rocks because they don't have distinct repetitive layers. Hence option a is correct.
What are metamorphic rocks?Metamorphic rocks are formed through intense pressure and heating from the sedimentary or igneous rocks. Sometime the change n heat or pressure make the metamorphic rocks gets foliated.
Foliation occurs when pressure forces flat or elongate minerals within a rock to align. These rocks form a platy or sheet-like structure that reflects the pressure direction. There is no platy or sheet-like structure in non-foliated metamorphic rocks.
Non-foliated rocks can be created in a variety of ways. Some rocks, like limestone, are composed of minerals that are not flat or elongate. Therefore, the given rocks are non-foliated.
To find more on foliated rocks, refer here:
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what happens when thermal energy is added to a substance?
Answer:
Explanation:
I believe that particles would move more faster and more thank likely increase kinetic energy when thermal energy is added to something.
How do SMRs provide more flexibility than ordinary nuclear reactors?
Select all that apply.
More reactors can be installed at a location as the energy demand increases.
Power plants can be built to fit locations with less demand or less space.
The SMRs can use multiple types of fuel and recycle byproducts if needed.
The SMRs can adjust their energy output using coolants and control rods.
Answer:
The SMRs can adjust their energy output using coolants and control rods.
Power plants can be built to fit locations with less demand or less space.
Explanation:
I think that it is but I am not sure.
Power plants can be built to fit locations with less demand or less space. The SMRs can adjust their energy output using coolants and control rods. The correct options are B and D.
What are SMRs?A wireless communications technology that competes with traditional cellular services. The base station equipment supplier is the transmitter licensee in an SMR system.
Power plants can be built to accommodate locations with low demand or limited space. Coolants and control rods allow SMRs to adjust their energy output.
These advanced reactors, which are expected to range in size from tens to hundreds of megawatts, can be used for power generation, process heat, desalination, or other industrial applications.
Light water or other non-light water coolants, such as a gas, liquid metal, or molten salt, may be used as a coolant in SMR designs.
Thus, B and D are correct options.
For more details regarding modularity, visit:
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What is the force of attraction between two atoms that are combined?
a. chemical bond
b. atomic bond
c. physical property
d. magnetic bond
Answer:
a
Explanation
Chemical bond refers to the forces holding atoms together to form molecules and solids. This force is of an electric nature, and the attraction between electrons of one atom to the nucleus of another atom contributes to what is known as chemical bonds.
HELP ASAP
1. a hurricane destroyed an entire city, what category would it most likely be?
a Category 4 or 5
b Category X or Y
c Category 1 or 2
d Category A or B
2. What happens immediately after a hurricane makes landfall?
a It starts hailing.
b Its winds pick up speed.
c It gets stronger.
d It gets weaker.
Answer:
1. category 4 or 5
2. it gets weaker
fountain
21. Calculate the quantity of electricity
in coulombs used when a current of
2.7 ampere is passed through a
solution of silver salt for 25 minutes
20 seconds
A. 87.5
B. 206
C. 1350
D. 4050
E. 4104
Answer:
4104 Coulombs
Explanation:
charge = time(sec) *current
25*60 =1500+20=1520
2.7A * 1520 sec =4104
4104 C
I’ll marmark you brainlist
The PC modem was invented in what year?
Answer:
1977
Explanation:
Getting connected: a history of modems. Then, in 1977, Dale Heatherington and Dennis Hayes created the world's first PC modem, the 80-103A.
CH(4)+ 20(2)→ CO2+ 2H(2)O
22.
The reaction shown above is an example of a -
a. synthesis reaction
b. combustion reaction
c. decomposition reaction
d. double displacement reaction
Answer:
Reaction is a Combustion reaction