can anyone just help me with these

Identify the following compounds as either ionic (I)or Covalent (c)​

Answer: D convection currents

Explanation:

The seafloor spreading is a phenomena that occurs due to liberation of heat from the convection currents generated in the mantle. It makes the earth crust more plastic and less dense. This happens at divergent plate boundaries. As the plates move apart, the less denser material rises. It leads to the formation of mountain and crust cracks.

Answer:

Had 3.612 x 10²⁴ ions (Not too sure of the answer )

Explanation:

But anyway heres My approach.

mole of sodium is 6 .

If 1 mole gives 6.02x10²³ ions

then 6moles will be = x ions

x ions = 6 x 6.02x10²³ / 1 mole

x = 3.612x10²⁴ ions

Answer:

Carbon dioxide is a very soluble gas. It dissolves readily in water. As the oceans formed, carbon dioxide dissolved to form soluble carbonate compounds so its amount in the atmosphere decreased. Carbonate compounds were then precipitated as sedimentary rocks, eg limestone.

Uptake by living organisms

Carbon dioxide was also absorbed from the oceans into photosynthetic algae and plants. Many of these organisms, and the simple organisms in the food chains that they supported were turned into fossil fuels, eg crude oil, coal and natural gas, which all contain carbon.

Coal is a fossil fuel which was formed from trees which were in dense forests in low-lying wetland areas. Flooding caused the wood from these forests to be buried in a way that prevented oxidation taking place. Compression and heating over millions of years turned the wood into coal.

Crude oil and natural gas were formed from simple plants and tiny animals which were living in oceans and lakes. These small organisms died and their remains sank to the bottom where they were buried under sediments. The lack of oxygen prevented oxidation from occurring.

Over millions of years, heat and pressure turned the remains of the organisms into crude oil and natural gas. Natural gas contains the smallest molecules and is often found on top of crude oil, trapped under sedimentary rock.

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Answer:

Changes in the atmosphere

Explanation:

Given the following choices, determine which best suits as a characteristic of a hurricane.

Answer Choices:

A. Hurricanes occur mostly inland

B. Hurricanes create widespread damage

C. Hurricanes can only last for a short amount of time

D. Hurricanes gain strength after passing overland

Best Answer: B. Hurricanes can create widespread damage.

Reason: A would not be correct since it is more of a variable, due to the fact that hurricanes usually begin near the coastlines, hurricanes are in fact capable of moving inland for atleast 100 miles before it dies down to a tropical storm or depression.

C is not correct since hurricanes can last up to a whole week which is approximately 168 hours.

D is not correct since it is another variable in which hurricanes can decrease in strength if it comes into contact with cool and dry air which is the opposite of warm and moist which it needs in order to occur.

Therefore, the best choice is B. Hurricanes can create widespread damage, hurricanes can unleash a staggering arsenal of mother nature's strength and the most damage a hurricane has caused can go up to 125 billion USD in damages.

One characteristic of hurricanes is that it: B. create widespread damage.

A natural disaster can be defined as a major adverse event that is caused by the forces of nature on planet Earth. Some examples of a natural disaster include the following:

Hurricane can be defined as an extremely large, powerful, violent storm that typically leads to the destruction of life and properties on both land and water.

In conclusion, a characteristic of hurricanes is that it is capable of creating widespread damage on planet Earth.

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Answer : The balanced chemical equation will be:

(i) [tex]2K+H_2SO_4\rightarrow K_2SO_4+H_2[/tex]

(ii) [tex]Mg(OH)_2+Zn\rightarrow Zn(OH)_2+Mg[/tex]

Explanation :

Balanced chemical equation : It is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.

Part (i):

The balanced chemical equation will be:

[tex]2K+H_2SO_4\rightarrow K_2SO_4+H_2[/tex]

This reaction is a single displacement reaction in which most reactive element (potassium) displaces the least reactive element (hydrogen) form their solution.

Part (ii):

The balanced chemical equation will be:

[tex]Mg(OH)_2+Zn\rightarrow Zn(OH)_2+Mg[/tex]

This reaction is a single displacement reaction in which most reactive element (zinc) displaces the least reactive element (magnesium) form their solution.

Answer:

bcoz there is  only two magnetic file orienation is possible

Explanation:

Answer:

Ba(ClO₃)₂ → BaCl₂ + 3 O₂

Explanation:

When exposed to heat, barium chlorate (Ba(ClO₃)₂ breaks down into an inorganic compound (Barium chloride - BaCl₂) and a molecule (Oxygen - O₂).

Answer:

6000cm3

Explanation:

2CO+O2-------> 2CO2

CO:CO2

1: 1

CO= 0.5 moles

CO:O2

2:1

O2 moles= 0.5÷2

=0.25moles

1 mole------> 24000cm3

0.25moles

(0.25x24000)÷1

= 6000cm3

The answer is 6000 cm[tex]^{3}[/tex].

At STP, the molar volume of any ideal gas is 22.4 L. We can identify condition “1” as the volume, temperature, and pressure of the CO2 sample at laboratory conditions and condition “2” as STP.

⇒ 2CO+O2-------> 2CO2

⇒ CO:CO2

⇒1: 1

CO= 0.5 moles

⇒ CO:O2

⇒ 2:1

⇒ O2 moles= 0.5÷2

⇒ 0.25moles

1 mole------> 24000cm3

⇒ 0.25moles

⇒ (0.25x24000)÷1

⇒ 6000cm[tex]^{3}[/tex]

6000cm[tex]^{3}[/tex] Volume Of Oxygen reacts with carbon monoxide to produce 0.5 moles of carbon dioxide at STP.

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Answer:

1. Hydrogen will diffuse faster.

2. The ratio of diffusion of hydrogen gas to that of the unknown gas is 4 : 1

Explanation:

Let the rate of diffusion of hydrogen gas, H2 be R1

Let the molar mass of H2 be M1

Let the rate of diffusion of the unknown gas be R2.

Let the molar mass of the unknown gas be M2.

Molar mass of H2 (M1) = 2x1 =2g/mol

Molar mass of unknown gas (M2) = 16 times that of H2

= 16 x 2 = 32g/mol

1. Determination of the gas that will diffuse faster. This is illustrated below:

R1/R2 = √(M2/M1)

R1/R2 = √(32/2)

R1/R2 = √16

R1/R2 = 4

Cross multiply

R1 = 4R2

From the above calculations, we can see that the rate of diffusion H2 (R1) is four times the rate of diffusion of the unknown gas (R2).

Therefore, hydrogen will diffuse faster.

2. Again, from the calculations made above, the ratio of diffusion of hydrogen (R1) to that of the unknown gas (R2) is given by;

R1/R2 = 4

Therefore, the ratio of diffusion of hydrogen (R1) to that of the unknown gas (R2) is:

4 : 1

Potential energy, because it is stored in the basic building block of all living organisms called cells and is only released when necessary for energy consuming work.

Answer:

radioactive noble gas is radon

which of the following is polymer

Cellulose is a linear polysaccharide polymer

nitrogen fixing bacteria is found in the root nodules of legumes

Explanation:

i hope this will help you

Answer:

1 radon nd krypton

2 polyvinyi cloride

3 legumes

4 alkynes

Answer:

YEESSS

Explanation:

Because that seems like the only logical answer.

Answer:

YES

Explanation:

YES

Answer:

The answer is explained below

Explanation:

Put the steps of the carbon cycle in order using Step 1 as your starting point

Step 1: Bacteria, through nitrogen fixation and nitrification, convert nitrogen into a usable form. The animal dies and decomposes, returning nitrogen back to the soil. Once nitrogen is in usable form, it is taken up by plants and assimilated into proteins.. An animal eats a plant and the nitrogen becomes part of the animal’s proteins.

The steps taking in the carbon circle using step 1 as the starting point is as follows:

Step 1:  Bacteria, through nitrogen fixation and nitrification, convert nitrogen into a usable form.

Bacteria convert nitrogen into nitrites and nitrates through the process of nitrification. Nitrites and nitrates are in the form that can be used by the plants

Step 2: Once nitrogen is in usable form, it is taken up by plants and assimilated into proteins.

The Nitrogen can only be used by the plants when in nitrites and nitrates form. When in this form, it is then assimilated into plant tissue as protein.

Step 3: An animal eats a plant and the nitrogen becomes part of the animal’s proteins.

An animal such as rabbit eats the plant and the protein in the plant becomes protein in the animal.

Step 4: The animal dies and decomposes, returning nitrogen back to the soil.

When the animal dies, the animal undergoes decomposition and the nitrogen in the animal is returned to the soil

Answer:

Ca3N2

Explanation:

Answer:

Coke, coal gas, gas carbon, ammonia liquor, and coal oil 

Answer:

P = 2,8,3

q = 2,8,6

Explanation:

Because the first shell contain 2 electron and the 2nd contain 8 electron and the last shell contain the electron which is left

Explanation:

p=1s^2,2s^2,2p^6,3s^2,3p^1

q=1s^2,2s^2,2p^6,3s^2,3p^4

the quantum numbers are used in my answer.

there are 4 quantum numbers.

1.principal quantum numbers

2.angular momentum quantum numbers

3.magnetic quantum numbers

4.spin quantum numbers

In this case,the angular momentum quantum numbers is being used.it describes the unique quantum state of an electron and is designated by the letter L.this behaviour manifests itself as the shape of the orbital.electron shells have distinct shapes denoted by letters,s,p,d,f.

l can be numbers like,0,1,2,3

the maximum electrons in each letter is,

s=2

p=6

d=10

f=14

the shapes of the sub_shells

s sub_shell is spherical

p sub_shell is two dumb_bells

d sub_shell is four dumb_bells

f sub_shell is eight dumb_bells

Answer:

A nucleus collides with a neutron and splits, releasing energy.

Explanation:

The answer option which best describes nuclear fission is: C. A nucleus collides with a neutron and splits, releasing energy.

A nuclear reaction can be defined as a type of reaction in which the nucleus of an atom is transformed by either being joined (fusion) or split (fission) with the nucleus of another atom of a radioactive element and accompanied by a release of energy.

Generally, there are two (2) main types of nuclear reaction and these are:

In conclusion, a nuclear fission causes a split of a heavy atomic nucleus into two or more nuclei (fragments) having approximately equal mass.

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Answer:

Rayon

Explanation:

Rayon developed for the first time in the late 19th century as a replacement for silk. Silk was expensive in those days as was an organic product made out of cocoons. Rayon was the first man-made fibre came to be known as an artificial textile material formed from cellulose obtained from plants. Rayon was a less expensive option for silk clothing and accessories.

Answer:

m = 50.74 kg

Explanation:

We have,

Initial temperature of water is 20 degrees Celsius

Final temperature of water is 46.6 degrees Celsius

Heat absorbed is 5650 J

It is required to find the mass of the sample. The heat absorbed is given by the formula ad follows :

[tex]Q=mc\Delta T[/tex]

c is specific heat of water, c = 4.186 J/g°C

So,

[tex]m=\dfrac{Q}{c\Delta T}\\\\m=\dfrac{5650}{4.186\times (46.6-20)}\\\\m=50.74\ kg[/tex]

So, the mass of the sample is 50.74 kg.

Answer: Light

Explanation:

The environment abiotic factors like sunlight, water, air, and soil are important for the growth of the plants. A wildflowers is a plant that grows in wild. It was not intentionally seeded or planted.

The light is one of the important environmental factor. As the wildflowers are blooming earlier than the large trees. Thus the wildflowers are receiving the light earlier than large trees.

Answer:

Explanation:

The early atmosphere

Scientists believe that the Earth was formed about 4.5 billion years ago. Its early atmosphere was probably formed from the gases given out by volcanoes. It is believed that there was intense volcanic activity for the first billion years of the Earth's existence.

The early atmosphere was probably mostly carbon dioxide, with little or no oxygen. There were smaller proportions of water vapour, ammonia and methane. As the Earth cooled down, most of the water vapour condensed and formed the oceans.

It is thought that the atmospheres of Mars and Venus today, which contain mostly carbon dioxide, are similar to the early atmosphere of the Earth.

Scientists can’t be sure about the early atmosphere and can only draw evidence from other sources. For example, volcanoes release high quantities of carbon dioxide. Iron-based compounds are present in very old rocks that could only have formed if there was little or no oxygen at the time.

Changes in the atmosphere

So how did the proportion of carbon dioxide in the atmosphere go down, and the proportion of oxygen go up?

The proportion of oxygen went up because of photosynthesis by plants.

The proportion of carbon dioxide went down because:

it was locked up in sedimentary rocks (such as limestone) and in fossil fuels

it was absorbed by plants for photosynthesis

it dissolved in the oceans

The burning of fossil fuels is adding carbon dioxide to the atmosphere faster than it can be removed. This means that the level of carbon dioxide in the atmosphere is increasing.

Answer:

A. NO2 gas released, [tex]NO_{3}^{-}[/tex] ion is present.

The residue is (ZnO) Zn oxide, [tex]Zn^{2+}[/tex] ion is present.

The white salt is Zn(NO3)2.

B.     CO2 gas released, [tex]CO_{3}^{2-}[/tex] ion present.

The residue ia (CuO ) Cu(||) oxide, [tex]Cu^{2+}[/tex] ion present .

The green salt is CuCO3.

C.   CO2 gas released, [tex]CO_{3}^{2-}[/tex] ion present.

The residue Pb(||) oxide, [tex]Pb^{2+}[/tex] ion is present.

The white salt is PbCO3.

D. CO2 gas released, [tex]CO_{3}^{2-}[/tex] ion present.

The residue is (ZnO) Zn oxide, [tex]Zn^{2+}[/tex] ion is present.

The white salt is ZnCO3.

Answer:

To determine whether a substance is an acid or a base, count the hydrogens on each substance before and after the reaction. If the number of hydrogens has decreased that substance is the acid (donates hydrogen ions). If the number of hydrogens has increased that substance is the base (accepts hydrogen ions).

Answer:

poluição atmosférica

Explanation:

O que eles estão tentando falar na pergunta é que a que termo nos referimos como a introdução de partículas estranhas na forma de suspensão etc. na atmosfera.

Este termo é conhecido como poluição do ar. É chamado assim porque, adulteramos a constituição original do ar, introduzindo esses novos componentes.

Esses componentes introduzidos muitas vezes têm um efeito adverso na composição da qualidade do ar.

Answer:

a, there will be more beetles available for other organisms

Answer:

c

Explanation:

Answer:

Explanation:

The states that all of the particles that make up matter are constantly in motion. As a result, all particles in matter have kinetic energy. The kinetic theory of matter helps explain the different states of matter—solid, liquid, and gas. ... Particles do not always move at the same speed.

Answer:

Physical property

Explanation:

We can visualize the property without the need to do any experiments.