pleasee help ASAP
will mark brainliest!

Answer:

b

Explanation:

Answer:

To answer, all living organisms contain carbon-based compounds, which classifies them organic.

Simply, carbon dioxide, is an example of an inorganic compound since it does not contain both carbon and hydrogen. Alternatively, one molecule of carbon dioxide contains one atom of carbon and two atoms of oxygen.

Explanation:

Scandium has atomic number of 21. This means that in it's neutral state its going to have 21 electrons.

a) The full electronic configuration is given as;

1s2 2s2 2p6 3s2 3p6 3d1 4s2

The final electron is placed in the d orbital. The shell is 3d

(b) When scandium has a charge if +1, it has lost an electron. The total number of electrons would now be 21-1 = 20

The electronic configuration would be given as;

1s2 2s2 2p6 3s2 3p6 4s2

The electron in the 3d orbital would be removed.

Answer:

chemical

Explanation:

Answer: D (8)

Explanation:

Answer:

d. 8

Explanation:

The octet rule refers to the tendency of atoms to prefer to have eight electrons in the valence shell. When atoms have fewer than eight electrons, they tend to react and form more stable compounds.

Answer:

Caesium atoms will form positively charged ions.

Explanation:

Due to them having one electron in their outer orbit, it is very likely that they will give that electron away to form an octet and become stable. Hence, since they lose an electron, they lose a negative charge, and in comparison to their former non-ion self, they have gained a positive charge.

Hence, they will form positively charged ions.

Hope this helped!

Answer:

Hope this helps! :)

Explanation:

Light is absorbed when an electron jumps to a higher energy orbit and emitted when an electron falls into a lower energy orbit. The energy of the light emitted or absorbed is exactly equal to the difference between the energies of the orbits.

The energy of the electron drops when it changes levels, and the atom releases photons. The emission of the photon occurs as the electron transitions from a higher to a lower energy state.

The electromagnetic force is carried by a photon, a basic particle that is a quantum of the electromagnetic field and includes electromagnetic radiation like light and radio waves. Since photons have no mass, they constantly travel in a vacuum at the speed of light.

When a photon of the appropriate wavelength collides with an atom, it vanishes and transfers all of its energy to the electron, which causes it to jump to a higher energy level.

The energy differential between two energy levels determines the amount of energy that is released during a certain transition.

Thus, The energy of the photon is precisely the energy that is lost when an electron moves to a level with less energy.

To learn more about photon, follow the link;

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The translation of the question is

Commercial solutions of HCl (MP = 36.5 g / mol) are typically 39.0% W / W of this acid in water. Determine the molality of the HCl solution if its density is equal to 1.20 g / ml.

Answer:

Molality is 17.51 molal

Explanation:

We are given 39% w/w of HCl, this means for every 100g of this solution we have 39g of HCl in it.

to ease the calculation we assume we have 1L(1000ml) of this solution is present.

Density = mass /volume

1.20 = mass/1000

mass = 1200 g of solution

and we are given that 39% of this solution is will contain HCl

so

1200 * 39/100 = 468g of HCl present

no of moles of HCl = 468/36.5 = 12.82moles

mass of solution = mass of water + mass of acid

mass of water = mass of solution - mass of acid

Mass of water = 1200 - 468 = 732g of water

Molality = moles /masss of water in kg

             = 12.82 *1000/732  =17.51molal

Answer:

Radiation ...........

[tex]\huge\boxed{Conduction}[/tex]

Conduction is the transfer of heat when two things come in contact with each other. The energy transfer is from hotter body to the colder body.

                                x---------------------------------------------x

There is a trick behind fire-walking. When the coal burns, after sometime there is a layer of ash on the surface of the coal which blocks the radiation. So the transfer of heat is not possible from radiation. Conduction is the only way possible. The person's feet and coal both are poor conductor of heat so if we walk quickly i.e. there is minimal time of contact with the coal, it will just feel a little warm. As the person start walking on the coal, It has to do it quickly, that way Person will feel its sole warming up but it is not that hot because of the layer of ash and poor conductance, after few steps the ash also sticks on to the sole of the person which makes kind of double layers of ash. So the only way for heat transfer is CONDUCTION.

Answer:

B. CO2 + H2O

Explanation:

Propane is an hydrocarbon as it contains only v=carbon and hydrogen atoms.

Whenever an hydrocarbon reacts with oxygen or undergoes a combustion reaction, two products are always formed only,

These two products are;

Carbon dioxide (CO2) and water (H2O)

This means the correct option is option B.

#1: A covalent bond

#2 False

#3True

Answer:

Iron age farm

Explanation:

edge 2020

Answer:

D

Explanation:

Got it right on edge

Answer:

In 1889, Ernest Rutherford recognized and named two modes of radioactive decay, showing the occurrence of both processes in a decaying sample of natural uranium and its daughters. Rutherford named these types of radiation based on their penetrating power: heavier alpha and lighter beta radiation. Gamma rays, a third type of radiation, were discovered by P. Villard in 1900 but weren't recognized as electromagnetic radiation until 1914. Since gamma radiation is only the discharge of a high-energy photon from an over-excited nucleus, it does not change the identity of the atom from which it originates and therefore will not be discussed in depth here.

Because nuclear reactions involve the breaking of very powerful intra nuclear bonds, massive amounts of energy can be released. At such high energy levels, the matter can be converted directly to energy according to Einstein's famous Mass-Energy relationship E = mc2. The sum of mass and energy are conserved in nuclear decay. The free energy of any spontaneous reaction must be negative according to thermodynamics (ΔG < 0), and ΔG is essentially equal to the energy change ΔE of nuclear reactions because ΔE is so massive.

Explanation:

Hope it helps

Answer:

Rutherford predicted that an atom has a dense core called a nucleus.

Explanation:

Ernest Rutherford was a physicist who is known as the father of nuclear physics. He suggested an atomic model known as the Rutherford model. According to him, the atom consists of a tiny, dense, positively charged core called a nucleus and negatively charged particles called electrons that circulate around it The nucleus consists of positively charged particles called protons and neutral particles called neutrons.

Answer:

Geologists have hypothesized that the movement of tectonic plates is related to convection currents in the earth's mantle. ... Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth's crust.

Explanation:

Answer:

Geologists have hypothesized that the movement of tectonic plates is related to convection currents in the earth's mantle. ... Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth's crust.

Explanation:

Answer:

since it is in grp 1, it will react with water like all other metals.

Answer:

Rubidium, as a Group 1 metal, will have a strong reaction with the water and form hydrogen. The reaction is so strong it might even be explosive, hence the danger of putting it in water.

Explanation:

Hope this helped!

Answer:

um..... okay I'll give it a shot

Answer:

clay

Explanation:

its more than the rest

Answer:

Structurally, plant and animal cells are very similar because they are both Eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, Iysosomes and peroxisomes. Plant cells can be larger than animal cells.

Explanation:

I majored in Chemistry

Answer:

An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable. Radioisotopes may occur in nature or be made in a laboratory. In medicine, they are used in imaging tests and in treatment.

Hope I could help!

Answer:

(RAY-dee-oh-I-suh-tope) An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable. Radioisotopes may occur in nature or be made in a laboratory. In medicine, they are used in imaging tests and in treatment. Also called radionuclide.

Explanation:

Answer:

3)N2, H2, Cl2........

Answer:

see the answer at the pic

The electron configuration for the electrons as listed are:

a) 1s² 2s² 2p⁵ = 9X

b) 1s² 2s² 2p⁶ 3s²  3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d⁸ = 46 X

c) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴

Using the quantum numbers of the identified electrons to derive the electron configuration ( the representation of the distribution of electrons in the orbit of  an atom ) electron configuration of electrons can be calculated using the formula :2n².

where n = orbit number and the various energy levels are represented as 1,2,3,4... while shells of the an atom is written as K,L,M,N

hence the electron configuration of the electrons identified by the quantum numbers are as written above.

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Answer:

From observing a substance's physical properties it has no effect on the substance because you are just observing it and not changing it.

Answer:

a theory for the hydrogen atom based on quantum theory that energy is transferred only in certain well defined quantities. Electrons should move around the nucleus but only in prescribed orbits.

Explanation:

Answer:

the answer is 180 j/k i think

Explanation:

Answer: its 79 for the first part and 180 on the second part

Explanation:

The answer is True because they are formed of deposition.

Answer:

2Mg (s) + CO₂ (g) → 2MgO (s) + C (s)

General Formulas and Concepts:

Chemistry - Reactions

Explanation:

Step 1: Define RxN

Mg (s) + CO₂ (g) → MgO (s) + C (s)

Step 2: Balance RxN

2Mg (s) + CO₂ (g) → 2MgO (s) + C (s)

Explanation:

here,

Mass (m)= 32 g =0.32 kg

Density(d)= 17 g/ml

volume (v)=?

we know that,

d=m/v

17=0.32/v

v= 0.32/17

v=0.018

Answer:

[tex]\boxed {\boxed {\sf v \approx 1.88 \ mL}}[/tex]

Explanation:

The density formula is:

[tex]d=\frac{m}{v}[/tex]

If we rearrange the formula for volume, the result is:

[tex]v=\frac{m}{d}[/tex]

The mass of the object is 32 grams. The density is 17 grams per milliliter.

[tex]m= 32 \ g\\d= 17 \ g/mL[/tex]

Substitute the values into the formula.

[tex]v=\frac{32 \ g}{17 \ g/mL}[/tex]

Divide. Note that the grams, or g, will cancel each other out.

[tex]v=\frac{32 }{17 \ mL}[/tex]

[tex]v=1.88235294 \ mL[/tex]

Let's round to the nearest hundredth to make the answer more concise.

The 2 in the thousandth place tells us to leave the hundredth place as is.

[tex]v \approx 1.88 \ mL[/tex]

The volume of the object is about 1.88 milliliters.

Answer:

Nothing. I guess ice vapor is a solid and water vapor is a liquid if nothing isn't an option, but that makes no sense.

Explanation: