Which are aspects covered by Bohr's atomic model?
Electrons can have a measured radius.
Higher orbits have lower energies.
Electrons orbit the nucleus.
Electrons do not have energy, the energy is determined by the orbit.

Explanation:

a unit of mass used to express atomic and molecular weights, equal to one twelfth of the mass of an atom of carbon-12.

Answer:

Atomic Mass Unit is also called Dalton. It is used to express atomic and molecular weight. It is defined as 1/12 of the mass of an unbound neutral atom of carbon.

Answer:

CuO+2HCl>h2o+CuCl2

fe203+6hcl->2fecl3+3h2O

gọi CuO, fe2o3 lần lượt là x,y

80x+160y=10

2x+6y=0.35

giải phương trình ta dc hai số x,y(tính phương trình kia ra)

cuo ban đầu sẽ là :60*x=z

fe203 ban đầu sẽ là :10-z=

Explanation:

Answer:

To reduce the bending of the railway

Explanation:

During summer(heat) metals tend to expand in size. The skits/gaps are present in the railway so that the metal could expand without causing bending of the railway track.

Answer: An exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative." Exothermic reactions usually release heat and entail the replacement of weak bonds with stronger ones.  

Exothermic reactions are important to forensic sciences and particularly to fire and explosion investigation. When a chemical reaction requires heat (rather than producing it) and results in cooling down the surroundings, it is conversely called endothermic.

Example-  

Respiration is a series of exothermic reactions that occur in the mitochondria of living cells in order to release energy from food molecules. This energy can then be used to produce heat, for movement, growth, reproduction and active uptake.

Hope it helps

when carbon dioxide gas is collected down ward of water wet gas is collected by the downward displacement of water . This is used for gases that are not very soluble in water . ... In water , carbon dioxide produces a weakly acidic solution , carbonic acid .

Answer:

when an atom loses electrons, it will then contain more protons. Thus, the charge of the atom become positive.

Answer:

C

Explanation:

I believe the answer is C.

cubic unit cell is the smallest repeated unit which have all angles equal to 90 and all have edge lengths equal

It is the type of the Unit cell which is having all angles equal to 90 and all sides equal to each other

it's is a unit cell with cubic structure

Answer:

B

Explanation:

I would say theory since a law is already set and proven by evidence. Theories arent necessarily proven.

Answer:

D. electron

Explanation:

Answer:

first is HABER

second is SUM

Explanation:

pls mark brainliest

Answer:

The answer will be this 30g/cm3

An example of natural resource that is renewable is wind. Details about natural resources can be found below.

Natural resources are resources that cannot be exhausted i.e. can be replenished with time.

Examples of natural resources are as follows:

Therefore, an example of natural resource that is renewable is wind.

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The natural resource that is renewable is wind. Therefore, option B is correct.

Renewable resources are natural resources that can be restocked or regenerated over a relatively short period of time, usually within a human lifetime. These resources are often contrasted with non-renewable resources, such as fossil fuels, which take millions of years to form and are finite in quantity.

Examples of renewable resources include solar energy, wind energy, hydroelectric power, geothermal energy, biomass, and tidal power.

These resources have the potential to provide energy and other materials indefinitely if used sustainably, making them an important part of efforts to move towards a more sustainable future. Therefore, option B is correct.

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this is a strong base and is one of the many bases that you're required to memorize.

Answer:

boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapour of the liquid; under this condition, addition of heat results in the transformation of the liquid into its vapour without raising the temperature

in case of water boiling point bring 0 degree

Answer:

it is the temperature at which water starts to boil. the temperate is 100°C or 212°F

Answer: Fe hóa trị II trong các hợp chất: FeSO4, Fe(OH)2

Fe hóa trị III trong các hợp chất: Fe2(SO4)3, Fe(OH)3

Explanation:

Answer:

Plastic pollution are harmful on land because;

Explanation:

The periodic table brings order to information about the chemical elements. It helps chemists to understand why elements react as they do. Elements in the same group have similar chemical properties. This is because they have the same number of outer electrons and the same valency

Answer:

94.8454

Explanation:

Let volume be V

Let Temperature be T

V1= 92

T1= 3C but to kelvin 273+3= 300K

V2= ?

T2= 18 C but to kelvin 18+273= 291

[tex] \frac{v1}{t1} = \frac{v2}{t2} [/tex]

[tex] \frac{92}{300} = \frac{v2}{291} [/tex]

[tex]v2 \times 300 = 92 \times 291[/tex]

[tex]v2 = \frac{92 \times 291}{300} [/tex]

[tex]v2 = 94.8454[/tex]

Answer:

Answer is 10.398(approx.)

Explanation:

NaOH ⇄ Na⁺ + OH⁻

pOH = -log[OH⁻]= -log(2.5×10⁻⁴) = 3.602

∴pH = 14 - pOH = 10.3989(approx.)

pls mark it as brainliest

Answer:

Explanation:

           The world is made up of ​living beings .    

Answer:

The answer would be: An atom’s nucleus occupies very little of the atom’s volume but contains most of its mass

Explanation:

The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom.

Almost all of the mass of an atom is located in the nucleus, with a very small contribution from the electron cloud.

Refer to https://en.wikipedia.org/wiki/Atomic_nucleus for further understanding

Answer:

Pb3O4 + 4H2 → 3Pb + 4H2O

Explanation:

Pb3O4

Tritium - H2

Molar Mass of H2 Bond Polarity H-3 Hydrogen-3 3H T

Products

Lead - Pb

Molar Mass of Pb Plumbum Element 82 Bulk Lead

Water - H2O

Molar Mass of H2O Oxidation Numbers of H2O Dihydrogen Monoxide Dihydridooxygen Hoh Hydrogen Hydroxide Dihydrogen Oxide Oxidane Hydrogen Oxide Pure Water

Answer:

Analytical Chemist

Forensics

Toxicologist

Biochemist

Chemical Engineer

Laboratory Technician

Pharmacologist

Chemical Technician

Materials Scientist

Environmental Chemist

Answer:

thermal radiation

Explanation:

Outgoing Long-wave Radiation (OLR) is electromagnetic radiation of wavelengths from 3–100 μm emitted from Earth and its atmosphere out to space in the form of thermal radiation. It is also referred to as up-welling long-wave radiation and terrestrial long-wave flux, among others.

The mass of nitrogen gas that participated in the chemical reaction is 1.54g

HOW TO CALCULATE MASS OF AN ELEMENT:

According to this question, a chemist determines by measurements that 0.0550 moles of nitrogen gas (N2) participate in a chemical reaction.

= 28.02g/mol

Hence, the mass of the nitrogen gas that participated in the chemical reaction is calculated as follows:

Therefore, the mass of nitrogen gas that participated in the chemical reaction is 1.54g

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Answer: Technician B

Explanation:

Technician B is correct. The freezing point of a substance is the temperature at which the substance changes state from a liquid to a solid.

Technician A is incorrect. On the other hand, the melting point of a substance is the temperature at which the substance changes state from a solid to a liquid.