I need help with 2, 3, and 4 please help i will give the brainliest

Answer:

D.

Explanation:

Answer:

The correct answer is d. i took the test and got it right

Explanation:

Answer:

atoms from different elements

Answer:

\/

Explanation:

Plants rely directly on the energy from the sun. The chloroplast create glucose from the sun rays through a process known as photosynthesis. Mushrooms, on the other hand, do not have the ability to use the sun's rays to create food, so they instead gather their energy from the nutrients from the soil or decaying things, such as plants, that once used the sun's radiation as sustenance. So basically mushrooms use the radiant energy from the sun indirectly and plants use it directly

Answer:

A) Glycerol

Explana

Answer:

Explanation:

The mass of the object can be found by using the formula

[tex]m = \frac{f}{a} \\ [/tex]

where

f is the force

a is the acceleration

We have

[tex]m = \frac{10}{4} = \frac{5}{2} \\ [/tex]

We have the final answer as

Hope this helps you

The number of protons, neutrons, and electrons is iodine-132, Iodine has 53 protons and 53 electrons as it has no charge the number of protons equals the number of electrons. Iodine-131 has 131 protons as well as neutrons.

Protons are subatomic particles that have a positive charge. The strong nuclear force holds protons together in the nucleus of an atom. Neutrons are non-charged subatomic particles (they are neutral).

A proton is a subatomic particle found in every atom's nucleus. The particle has a positive electrical charge that is equal to and opposite to the electron's.

Iodine-132 is the number of protons, neutrons, and electrons. Iodine has 53 protons and 53 electrons because it has no charge, so the number of protons equals the number of electrons. Iodine-131 contains 131 protons and neutrons.

Thus, there will be 131 protons as well as neutrons in iodine-131.

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Answer:

See explanation

Explanation:

The oxides or hydrides are formed by exchange of valency between the two atoms involved. The group of the atom bonded to oxygen or hydrogen in the binary compound can be deduced by considering the subscript attached to the oxygen or hydrogen atom.

Now let us take the journey;

R2O3- refers to an oxide of a group 13 element, eg Al2O3

R2O - refers to an oxide of group a group 1 element e.gNa2O

RO2 - refers to an oxide of a group 14, 15 or 16 element such as CO2, NO2 or SO2

RH2 - refers to the hydride of a group 12 element Eg CaH2

R2O7 - refers to an oxide of a group 17 element E.g Cl2O7

RH3- refers to a hydride of a group 13 element E.g AlH3

Answer:

What is your body made of? Your first answer may be that it is made up of different organs like the heart, lungs, and stomach, which work together to keep it going. Or you could go even closer and say that it is made of many types of cells. However, at the most basic level, your body — and indeed, all life, like everything that is not alive — is made up of atoms, often organized into larger structures called molecules

Explanation:

Just try ur Best ok your welcome

Answer:Find it

Explanation:

Aluminium-27 is an isotope of aluminium characterized by the fact that is has a mass number equal to  

27

.

Now, an atom's mass number tells you the total number of protons and of neutrons that atom has in its nucleus. Since you're dealing with an isotope of aluminium, it follows that this atom must have the exact same number of protons in its nucleus.

The number of protons an atom has in its nucleus is given by the atomic number. A quick looks in the periodic table will show that aluminium has an atomic number equal to  

13

.

This means that any atom that is an isotope of aluminium will have  

13

protons in its nucleus.

Since you're dealing with a neutral atom, the number of electrons that surround the nucleus must be equal to the number of protons found in the nucleus.

Therefore, the aluminium-27 isotope will have  

13

electrons surrounding its nucleus.

Finally, use the known mass number to determine how many neutrons you have

Another process that contributes to the formation of rock at point R is the:

According to the given question, we need to find another process which can help with the rock formation at point R where the rock melts underground to form magma.

As a result of this, another process through which makes a significant contribution to the formation of rock at point R is the cooling of the lava as the magma which has been melted runs down the mountain.

Therefore, the correct answer is option B

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Answer:

This is because earth is at a tilt, and the tilt is the cause of all seasons. In winter, we are the furthest from the sun due to the tilt.

Explanation:

Answer : The correct option is (b) [tex]1.01\times 10^{24}[/tex]

Explanation : Given,

Mass of cesium = 223 g

Molar mass of cesium = 133 g/mole

First we have to calculate the moles of cesium.

[tex]\text{Moles of cesium}=\frac{\text{Given mass cesium}}{\text{Molar mass cesium}}[/tex]

Now putting all the given values in this formula, we get:

[tex]\text{Moles of cesium}=\frac{223g}{133g/mol}=1.67mol[/tex]

Now we have to calculate the number of atoms of cesium.

As, 1 mole of cesium contains [tex]6.022\times 10^{23}[/tex] atoms of cesium

So, 1.67 mole of cesium contains [tex]1.67\times 6.022\times 10^{23}=1.01\times 10^{24}[/tex] atoms of cesium

Therefore, the number of atoms of cesium are [tex]1.01\times 10^{24}[/tex]

Answer:

The mass is 12.0107 but it rounds up to 12

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question we have

mass = 2.54 × 200

We have the final answer as

Hope this helps you

Answer:

mechanical

Explanation:

cause mechanical energy is the sum of potential and kinetic enery

Answer:No

Explanation:

Well yes but no, There cant be high tempreture that is 100 degrees and a low tempreture that is 20 degress, there has to be a mid inbetween both, they cant be next to eachother.

Answer:

13.3g

Explanation:

3.04g + 4.134g + 6.1g = 13.274g

=13.3g

When expressing the correct number of significant figures in addition, you go to the last common decimal place. In this case that is 0.1 because all the numbers have this decimal place.

This is because your measurement can only be as precise as the least precise measurement. The more decimal places in the measurement, the more precise the measurement.

Answer: True

Explanation:

It is possible for a substance  to go directly from solid to gaseous state due to sublimation.

Sublimation is defined as a process in which transition  of a substance takes place  from solid to gas phase without passing through the intermediate liquid phase.

It is an endothermic process which occurs at temperatures and  pressure below the triple point. Reverse process of sublimation is deposition in which substances in gaseous phase directly go into solid phase.

It only refers to the change in state  and not for describing transformation  of substances. Sublimation requires an additional amount of energy and is an endothermic change proceeding with absorption of energy.

The enthalpy of sublimation is calculated by adding enthalpy of fusion and enthalpy of vaporization.

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Answer:

the second one

Explanation:

becuase i asked my teacher

Answer:this ? 2end one

Explanation:

Answer:

H2O is a compound because its a main constitute of earths hydrosphere

Answer:

A

Explanation:

The golf ball has more inertia than the table-tennis ball, so it takes

more force to change the motion of the golf ball.

Answer:

42.9158 m/s

Explanation:

the answer is there above

Answer:

7.325 mol.

Explanation:

use the formula n=m/mr

so that makes:

234.4/16*2

which is 7.325 mol.

Answer:

EASSSSSYYY give me a harder question smh

if you want you can give me Brainliest answer lol

Explanation:

A solid’s particles are packed closely together. The forces between the particles are strong enough that the particles cannot move freely.

A liquid is a fluid that conforms to the shape of its container but that retains a nearly constant volume independent of pressure. The volume is definite (does not change) if the temperature and pressure are constant.

Gas molecules have either very weak bonds or no bonds at all, so they can move freely and quickly. Because of this, not only will a gas conform to the shape of its container, it will also expand to completely fill the container.

Answer:

A. An atom

Explanation:

A large scale model is one that is bigger than the object itself. These are needed to visualise structures and behaviours that we cannot normally see. A large scale model is needed for small objects, such as an atom. Larger objects do not need even bigger models

Answer:

The nucleus has an overall positive charge as it contains the protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.