Answer: Science is a particular way of knowing about the world. In science, explanations are restricted to those that can be inferred from confirmable data—the results obtained through observations and experiments that can be substantiated by other scientists. Anything that can be observed or measured is amenable to scientific investigation. Explanations that cannot be based on empirical evidence are not a part of science.
Explanation:
Answer:
Modeling can help scientists study things that they can’t directly observe. Plesiosaurs no longer exist. So, scientists can’t directly see how they moved their flippers. However, they can use existing evidence—the fossil structures of plesiosaurs—to bring these organisms to life in a computer model.
Explanation:
Sample but you can reword
can Someone help me with this
Answer:
1. Mg²⁺ 2. Cl⁻ 3. PO₄³⁻
Explanation:
Answer:
1. Mg²⁺
2. Cl⁻
3. PO₄³⁻
Explanation:
Feel free to give brainliest.
Have a great day!
how many atoms are in the following:
2CH4
10Mg(OH)2
5Al2(SO4)3
3 H2O
Answer:
2CH4= 2+8 = 10 atoms
10Mg(OH)2 = 5 atoms
5Al2(SO4)3 = 85 atoms
3 H2O = 9 atoms
Explanation:
Jocelyn and her friends put some raisins, hazelnuts,
almonds, and peanuts in a bowl to make a snack for their
hiking trip. What does this snack represent?
A. a solution
B. a new element
C. a new compound
D. a mixture
plspslsspslpsl help its revision for exam and i need it quick brainliest for the right answer :D
Answer: D. a mixture
Explanation: When you mix different types of nuts or snacks together including raisins, hazelnuts, almonds, and peanuts to make some kind of trail mix, then you are creating a mixture, specifically a heterogeneous mixture.
Which is bigger an atom or a cell?
Answer:
Both are small
Explanation:
Atom comprises to die molecules, and cell comprise to for tissues
How many molecules are in a mole 0.500 mile of N205
What is the mole ratio of the following equation?
2Mg + O2 + 2MgO
O 2:1:2
O 1:2
O 2:2:2
o 2:1
!PLEASE HELP ASAP!
How many grams of aluminum can be produced by decomposing 12.3 grams of aluminum
oxide?
Which of the following is an example of a chemical change?
A. Sugar Dissolving
B. Eggs frying
C. Ice melting
D. Flour and salt being mixed together
Answer:
Eggs Frying
Explanation:
;)
Iridium has two naturally occurring isotopes, Iridium-191 and Iridium-193. If the average atomic mass of orodum s 192.217, what are the average percent abundances of each isotope?
Answer:
The percent isotopic abundance of Ir-193 is 60.85 %
The percent isotopic abundance of Ir-191 is 39.15 %
Explanation:
we know there are two naturally occurring isotopes of iridium, Ir-191 and Ir-193
First of all we will set the fraction for both isotopes
X for the isotopes having mass 193
1-x for isotopes having mass 191
The average atomic mass is 192.217
we will use the following equation,
193x + 191(1-x) = 192.217
193x + 191 - 191x = 192.217
193x- 191x = 192.217 - 191
2x = 1.217
x= 1.217/2
x= 0.6085
0.6085 × 100 = 60.85 %
60.85% is abundance of Ir-193 because we solve the fraction x.
now we will calculate the abundance of Ir-191.
(1-x)
1-0.6085 =0.3915
0.3915× 100= 39.15 %
If you were going to draw a Lewis model of magnesium, how many valence electron dots would you do?
What volume of 18.5 M nitric acid would be needed to make 25.0 mL of 3.0M?
Answer:What volume of 9.00 M nitric acid is needed to make 6.50 L of 1.25 M solution? 903 mL What molarity should the stock solution be if you want to dilute 25.0 mL to 2.00 L and have the final concentration be 0.103 M?
Explanation:
When electricity is produced from coal the chemical energy in coal is changed to ___ energy
Answer: electrical energy
Explanation:
According to law of conservation of energy, energy remains conserved. It only transforms from one form to another.
Chemical energy is the energy stored in the bonds of molecules.
Electrical energy is the energy possessed by a body by virtue of movement of electrons.
Thus when When electricity is produced from coal the chemical energy in coal is changed to electrical energy
Is it possible for something such as a cake or a potato to get so hot that it melts? Normally when you heat something up a whole lot, it melts, but when you put liquid cake batter in an oven it turns into a solid, then it burns, but is there a way to heat it up so much so that it turns back into a liquid? Same thing with a potato, if you heat it up, it will burn, but can you turn a potato into a liquid by heating it up too much? Plz help im rlly stuck...
Answer:
I dont think so. If you continue to heat them up they will shrink and dissapper r become ashes. Thats a very interesting question btw. :) hope this helps!
Explanation:
Which of the following statements is true about cells?
A. All cells look the same.
B. All cells perform the same function.
O C. All cells perform specialized functions.
O D. All cells are prokaryotic.
Answer:
Explanation: i think it is C if i'am wrong i'am sorry
What occurred during Rutherford’s experiment that led to his discovery of the nucleus?
Answer:
Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup." Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.
Explanation:
What happens when the North Pole of one bar magnet is near the south Pole of another bar magnet?
A.Both attraction and repulsion
B.neither attraction nor repulsion
C.attraction
D.repulsion
When the North Pole of one bar magnet is near the South Pole of another bar magnet, they will attract each other. So, the correct option is C, attraction. This is because opposite magnetic poles attract each other, while like magnetic poles repel each other.
What is a magnetic field?A magnetic field is a region in space where a magnetic force can be detected. It is created by the movement of charged particles, such as electrons, protons, and ions. A magnetic field can be produced by a magnet, an electric current, or a changing electric field.
When the North Pole of one bar magnet is near the South Pole of another bar magnet, they will attract each other. This is because the magnetic field lines of the two magnets interact in such a way that they try to align with each other. Since opposite magnetic poles attract each other, the North Pole of one magnet will be attracted to the South Pole of the other magnet.
The magnetic force between the two magnets depends on the strength of the magnetic field and the distance between the magnets. The closer the magnets are, the stronger the magnetic force will be.
Therefore option C, attraction is correct.
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Plz help it's due soon. Calculate the energy and frequency of red light having a wavelength of 6.55 x 10⁻7m.
Answer:
E = 3.035× 10-¹⁹J = 1.9eV
f = 4.58 × 10¹⁴Hz
Explanation:
wavelength = 6.55 × 10-⁷m
c = 3 × 10⁸m/s
f = ?
E = ?
a) f = c/wavelength
f = 3 × 10⁸/6.55 × 10-⁷
f = 4.58 × 10¹⁴Hz
b) E = hc/wavelength
E = 6.626×10-³⁴ × 3 × 10⁸/ 6.55 × 10-⁷
E = 3.035 × 10-¹⁹J
1ev = 1.6 × 10-¹⁹J
Therefore E = 3.035/1.6 = 1.9eV
Hope it's not too late man
Which is the correct orbital diagram for carbon?
ОА.
1s
2s
2p
OB.
1s
2s
2p
112 1
2p
Ос.
1s
2s
OD.
1s
2s
2p
11
The modern periodic table consists of the elements which are arranged in the increasing order of their atomic numbers. The element 'C' belongs to 14th group of the periodic table. The correct option is A.
What is orbital diagram?The orbital diagrams are the pictorial representation of the electrons in an atom. The orbital diagrams are mainly based on the Auf Bau principle, Pauli's exclusion principle and Hund's rule of maximum multiplicity.
According to Auf Bau principle, the electrons are arranged in the orbitals in the increasing order of their energies. The pauli's exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers.
The hund's rule states that the unpaired electrons in the orbitals have parallel spins. The atomic number of 'C' is 6, and its electronic configuration is 1s²2s²2p².
Thus the correct option is A.
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Which refers specifically to a solution with as much dissolved solute as it can hold at a given temperature?
supersaturated
saturated
heterogeneous
homogeneous
Please and fast
Answer:
Saturated is the answer you are looking for
Explanation:
This is saturated's meaning: holding as much water or moisture as can be absorbed; thoroughly soaked.
"a mass of saturated air decreases in temperature as it rises in the atmosphere" Hence why the answer is saturated! :)
Hope this helps! :)
Answer: Saturated
Explanation: On Edge!!!!!!!!!!!!!
Acid rain is a type of pollution caused mainly from
fertilizer use
high concentrations of nitric and sulfuric acid from pollution
use of pesticides
CFC's
с
d
Answer:
im pretty sure its the second one
What might happen to the cryosphere if the insulating effect of the atmosphere increased?
Answer:
Acting like a highly reflective blanket, the cryosphere protects Earth from getting too warm. Snow and ice reflect more sunlight than open water or bare ground. Changes in snow and ice cover affect air temperatures, sea levels, ocean currents, and storm patterns all over the world.
Explanation: Hope this answers your question
Explain the
purpose
of the heat exchanger in the nuclear power plant.
Answer:
yeah someone explain
Explanation:
tttttttttt%ttttttt
Answer:
A heat exchanger is device which is designed to transfer heat from one matter to another. In nuclear power plants, these heat exchangers are used to pass heat from primary system to the secondary system. In the process they produce steam from water, they are also called steam generators or pressurized water reactors.
Photosynthesis uses all of the following except___to make food.
A) Carbon dioxide
B) Chemical energy
C) Light energy
D) Water
Answer:
A
Explanation:
thanks me hehe lovelots
Explain how fossil evidence is evidence of plate tectonics.
Answer:
Answer
Explanation:
Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together. Fossils tell us when and where plants and animals once existed. ... This distribution of fossils led to theories that the southern continents were once joined in a supercontinent called Gondwana.
Answer: Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together. Fossils tell us when and where plants and animals once existed.
Explanation: I hoped that helped plzz mark as brainliest !!
help help help help help help help help help help please!!! worth 20 points please helppppp!!!!
Explanation:
here
Al is 2
so is 6
and more you can do it
1.5 mol of the complex substance carbon dioxide (CO2) is just a few oxygen atoms:
Answer:
9.03 x 10²³atoms
Explanation:
Given parameters:
Number of moles of CO₂ = 1.5mol
Unknown:
Number of atoms = ?
Solution:
In a mole of a substance, we have the Avogadro's number of particles which is 6.02 x 10²³atoms.
Using this number, we can determine the amount of atoms in any substance.
If;
1 mole of CO₂ contains 6.02 x 10²³ atoms;
1.5mole of CO₂ will contain 1.5 x 6.02 x 10²³ atoms
= 9.03 x 10²³atoms
(PLSSS HEELP)Which landform is created by wind?
Delta
Desert gravel
Horns
Oxbow lake
Plants contain three types of tissue. Describe the function of each. What are the tissues made of?
Each plant organ (roots, stems, leaves) contains all three tissue types: ... Vascular tissue is made of two specialized conducting tissues: xylem and phloem. Xylem tissue transports water and nutrients from the roots to different parts of the plant, and also plays a role in structural support in the stem
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A sealed 10.0 L flask at 400 K contains equimolar amounts of ethane and propanol in gaseous form. Which of the following statements concerning the average molecular speed of ethane and propanol is true?
(A) The average molecular speed of ethane is less than the average molecular speed of propanol.
(B) The average molecular speed of ethane is greater than the average molecular speed of propanol.
(C) The average molecular speed of ethane is equal to the average molecular speed of propanol.
(D) The average molecular speeds of ethane and propanol cannot be compared without knowing the total pressure of the gas mixture.
Answer:
Im a 100% sure it is B. average molecular speed of ethane is greater than the average molecular speed of propanol.
Explanation:
Sry I didnt' get the explaination from my teacher.
According to the Kinetic theory of gases, the average speed of all gases at the same temperature will be in the same range. Hence, option C is correct.
What is kinetic theory of gases ?Kinetic theory of gases states the properties and composition of gases at a temperature and pressure. According to this theory, gaseous substances are made of tiny particles which are free to move and collide to each other.
The kinetic energy of the particles is directly proportional to the temperature. Hence, as the temperature increases, the kinetic energy increases and their average molecular speed increases.
At the same temperature, all the gases have equal range of average molecular speed irrespective of their molecular weight. Hence, at 400 K the average molecular speed of ethane and propanol will be the same.
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What is the molar mass of CHCl3?
48.47 g/mol
83.92 g/mol
119.37 g/mol
121.39 g/mol
119.37 g/mol
Further explanationRelative atomic mass (Ar) and relative molecular mass / molar mass (M)
the molar mass/molecular mass of a compound : the sum of the relative atomic mass (Ar) of the constituent atoms
M AxBy = (x.Ar A + y. Ar B)
Atomic weight (Ar) of :
C : 12.0107 g/mol H : 1.00784 g/mol Cl : 35.453 g/molThe molar mass of CHCl₃
[tex]\tt CHCl_3=12.0107+1,00784+(35,453\times 3)=119.37~g/mol[/tex]
The molar mass of [tex]CHCl_3[/tex] (chloroform) is 119.37 g/mol. Therefore, the correct option is C.
The organic compound chloroform, which has the molecular formula [tex]CHCl_3[/tex], is well known for its use as a solvent and anaesthetic. It consists of three chlorine atoms (Cl), one hydrogen atom (H), and one carbon atom (C).
The molar mass of carbon (C) is approximately 12.01 g/mol, the molar mass of hydrogen (H) is approximately 1.01 g/mol, and the molar mass of chlorine (Cl) is approximately 35.45 g/mol. We add up the molar masses of all the individual atoms to determine the molar mass of [tex]CHCl_3[/tex]:
(1 * molar mass of C) + (1 * molar mass of H) + (3 * molar mass of Cl)
(1 * 12.01 g/mol) + (1 * 1.01 g/mol) + (3 * 35.45 g/mol)
12.01 g/mol + 1.01 g/mol + 106.35 g/mol
The molar mass of [tex]CHCl_3[/tex] is approximately 119.37 g/mol.
Therefore, the correct answer is C.
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