please help me thanks :D

Answer:

I really hope this helped❤

Explanation:

welll, in chemistry and physics, the Avogardo constant is the number of constituent particles, usually atoms or molecules that are contained in the amount of substance given by one mole and is equal to 6.02 × 10**23. so 3 moles of carbon atoms would be 18.06 × 10**23.

Answer:

we get rain and the water cycle grows our plants too

Explanation:

Answer:

It would be the first one, an overall positive charge on one end and overall negative charge on the other end.

Explanation:

Answer:

It's A.) A molecule that has an overall positive change in one end and an overall negative charge on the other

Explanation:

The definition of a polar molecule is a molecule with a negatively charged end and a positively charged end.

Answer:

See below!

Explanation:

An acid (A) will have acid in the name.  It will also have a hydrogen bonded to an electronegative compound.  A molecular compound (M) will have nonmetals and/or hydrogen.  An ionic compound (I) will have nonmetals and first and second column metals.  It could also include charged compounds.  A transition metal (TM) will have a transition metal in the compound.

The formulas for TM and I are made by balancing the charges of the atoms to equal zero.  The formulas for M can be found from the name itself.  The formulas for A have to be memorized.

TM  ==>  copper (II) oxide  ==>  CuO

A  ==>  hydrosulfuric acid  ==>  H₂S

TM  ==>  iron (III) fluoride  ==>  FeF₃

TM  ==>  lead (II) chlorate  ==>  PbCl₂

A  ==>  hydrochloric acid  ==> HCl

M  ==> dihydrogen monoxide  ==>  H₂O

A  ==>  sulfurous acid  ==>  H₂SO₃

I  ==>  potassium oxide  ==>  KO

I ==>  ammonium hydroxide  ==>  NH₄OH

M  ==> nitrogen trioxide  ==>  NO₃

I  ==>  aluminum phosphate  ==>  AlPO₄

To name ionic (I) compounds, simply put the name of the metal with the nonmetal.  But, for the nonmetal change, the ending to "-ide".  To name acids (A), say hydro- with the atom/compound it is attached to and end with acid.

I  ==>  MgSO₄  ==>  magnesium sulfate

I  ==>  HgS  ==>  mercury sulfide

I  ==>  Na₂S  ==>  sodium sulfide

A  ==>  HF  ==>  hydrofluoric acid

I  ==>  KCN  ==>  potassium cyanide

Answer:

the first choice i  believe

Explanation:

Answer:Binary acids  are acids composed of two atoms ,a hydrogen element and non metal element .Binary acids are also known as Hydracids.

Explanation:For example

Hydrochloric acid (HCl), hydrofluoric acid (HF), and hydroiodic acid (HI) are all binary acids.

Answer:To proceed scientifically, you could measure several properties of the unknown liquid and compare them with the properties of known substances. You might observe and measure such properties as color, odor, texture, density, boiling point, and freezing point.

Explanation:

Answer:

Explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 10 m/s²

From the question we have

PE = 45 × 10 × 2

We have the final answer as

Hope this helps you

Answer:

Answer:

Work done, W = 900 joules

Explanation:

It is given that,

Force acting on the man, F = 75 N

Distance, d = 12 m

We need to find the work done by the man on the box. Let it is given by W. The work done of an object is equal to the product of force and distance. Mathematically, it can be calculated as :

W = F × d

W=75\ N\times 12\ mW=75 N×12 m

W = 900 joules

So, the work done by the man on the box is 900 joules. Hence, this is the required solution.

hope it is helpful

Answer:

2.1 moles of water formed.

Explanation:

Given data:

Moles of water formed = ?

Moles of Ni(OH) = 4.20 mol

Solution:

Chemical equation:

2Ni(OH)    →  Ni₂O + H₂O

Now we will compare the moles of Ni(OH)  with water.

             Ni(OH)           :            H₂O

                2                 :              1

              4.20             :            1/2×4.20 = 2.1 mol

2.1 moles of water formed.

m=d/g

m=0.772/9.8

m=0.0787755102

now,

d=m/v

0.772=0.0787755102/v

v=

Answer:

i think use water displacement with just one 10c

Explanation:

Answer:

2, stronger hydrogen bonding

Explanation:

[tex]\rm H_2O[/tex] has higher boiling point than [tex]\rm H_2S[/tex], as there has been stronger hydrogen bonding in [tex]\rm H_2O[/tex]. Thus, option 2 is correct.

The boiling point has been the temperature at which the liquid has been converted to the gaseous form. The boiling point has been based on the intemolecular attractions between the atoms.

Based on the intermolecular interactions, the compound with higher intermolecular force required more energy to break the bond and change the state, and thus have high boiling point.

The hydrogen sulfide and water has hydrogen bonding. The hydrogen bonding has been based on the electronegativity of the atom involved.  The more electronegative atom, stronger will be hydrogen bonding and thereby higher boiling point.

In [tex]\rm H_2S[/tex] and [tex]\rm H_2O[/tex], the oxygen has been more electronegative than sulfur and thus results in stronger hydrogen bonding.

Thus, [tex]\rm H_2O[/tex] has higher boiling point than [tex]\rm H_2S[/tex], as there has been stronger hydrogen bonding in [tex]\rm H_2O[/tex]. Thus, option 2 is correct.

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Answer:

The atomic mass of iron (Fe) is 55.85 amu. The atomic mass of radium (Ra) is 226 amu. One mole of atoms of any element contains 6.022 X 1023 atoms, regardless of the type of element.

Iron (Fe) has an atomic mass of 55.845 g/mol. So if you have 13.2 grams, you have 13.2/55.845 mol = 0.2364 moles.

Hope this helps!

Explanation:

Answer:

C. number of particles

Explanation:

Entropy is the measure of disorderliness of a system. Remember that when you dissolve salt in water, you increase the number of particles in the solution. The greater the number of particles in solution, the greater the entropy of the  solution system.

Hence dissolution of a salt in water increases the entropy by increasing the number of particles in solution leading to the inequality; Ssolution > Swater + Ssalt.

Answer:

A . The work done stretching a spring is transformed into stored energy in the spring

Explanation:

The work done stretching a spring is transformed into stored energy in the spring is clear indication of the law of conservation of energy.

The law of conservation of energy states that "energy is neither created nor destroyed but transformed from one form to another".

This is an energy transformation process.

Answer:

Less soil erosion

Explanation:

Due to the low amount of rainfall in this region, it is easier to say that the region compared to other ecoregion will suffer less soil erosion.

Erosion is usually the washing away of the top layer of the soil. Rainfall is one of the most important element that causes erosion. Surface runoff for an extended period of time can remove the topmost layer of the earth on which plant can grow. This starves the soil of its rich nutrients and minerals.

Answer:

b

Explanation:

Answer:

ita b

Explanation:

trust fam

1 A

2 C

3 G

4 D

5 E

6 A and G

7 D and E  

8 F

9 B

10 C

11 if it is in motion and how much motion it has

12 a bow being pulled back shows potential and dropping a ball can chow kinetic

IM SO SRRY  don't feel bad

Answer:

I’m sad

Explanation:

Answer:

6.72 g

Explanation:

Given data:

Mass of calcium chlorate = 13.8 g

Mass of oxygen produced = ?

Solution:

Chemical equation:

Ca(ClO₃)₂        →      CaCl₂ + 3O₂

Number of moles of calcium chlorate:

Number of moles = mass / molar mass

Number of moles = 13.8 g/ 206.98 g/mol

Number of moles = 0.07 mol

Now we will compare the moles of oxygen and  calcium chlorate.

                 Ca(ClO₃)₂         :            O₂

                      1                   :              3

                    0.07               :            3×0.07=0.21 mol

Mass of oxygen:

Mass = number of moles × molar mass

Mass = 0.21 mol × 32 g/mol

Mass = 6.72 g

Answer:

3.702×10^24 atoms of Oxygen.

Total, 6.15 moles of oxygen atoms in 98.4g of oxygen gas (O₂), which is equivalent to 6.15 × 6.022 × 10²³ (Avogadro's number) oxygen atoms.

Oxygen gas (O₂) is indeed diatomic, meaning it exists as a molecule with two oxygen atoms bonded together.

To calculate the number of oxygen atoms in 98.4g of oxygen gas (O₂), we need to use the molar mass of oxygen and the given mass.

The molar mass of oxygen (O₂) will be 32.00 g/mol.

Number of moles of oxygen gas = Mass (g) / Molar mass (g/mol)

Number of moles of oxygen gas = 98.4 g / 32.00 g/mol

≈ 3.075 moles

Since each molecule of oxygen gas (O₂) contains two oxygen atoms, the number of oxygen atoms will be twice the number of moles of oxygen gas.

Number of oxygen atoms = 2 × Number of moles of oxygen gas

Number of oxygen atoms ≈ 2 × 3.075 moles

≈ 6.15 moles

Therefore, there are approximately 6.15 moles of oxygen atoms in 98.4g of oxygen gas (O₂), which is equivalent to 6.15 × 6.022 × 10²³ (Avogadro's number) oxygen atoms.

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Answer:

33

Explanation:

Answer:

you can burn it.

Explanation:

that is the way to change paper

Answer: See explanation

Explanation:

Annalyn weighs 45.3 kg.

Roby is 2.56 kg lighter than Annalyn. This means that the weight of Roby will be:

= 45.3kg - 2.56kg

= 42.74kg

Together with Cecille, the three of them weigh 150.09 kg. Cecille weight will be:

45.3kg + 42.74kg + Cecille = 150.09kg

88.04kg + Cecille = 150.09kg

Cecille = 150.09kg - 88.04kg

Cecille weight = 62.05kg

To check of my answer is correct, I'll add all their ages together. This will be:

= 45.3kg + 42.74kg + 62.05kg

= 150.09kg

Answer:

So yes it True.

Explanation:

A seismometer is the internal part of the seismograph, which may be a pendulum or a mass mounted on a spring; however, it is often used synonymously with "seismograph".

Seismographs are instruments used to record the motion of the ground during an earthquake. They are installed in the ground throughout the world and operated as part of a seismographic network. The earliest "seismoscope" was invented by the Chinese philosopher Chang Heng in A.D. 132. This did not, however, record earthquakes; it only indicated that an earthquake was occurring. The first seismograph was developed in 1890.

A seismograph is securely mounted onto the surface of the earth so that when the earth shakes, the entire unit shakes with it EXCEPT for the mass on the spring, which has inertia and remains in the same place. As the seismograph shakes under the mass, the recording device on the mass records the relative motion between itself and the rest of the instrument, thus recording the ground motion. In reality, these mechanisms are no longer manual, but instead work by measuring electronic changes produced by the motion of the ground with respect to the mass.

A seismogram is the recording of the ground shaking at the specific location of the instrument. On a seismogram, the HORIZONTAL axis = time (measured in seconds) and the VERTICAL axis= ground displacement (usually measured in millimeters). When there is NO EARTHQUAKE reading, there is just a straight line except for small wiggles caused by local disturbance or "noise" and the time markers. Seismograms are digital now - there are no more paper recordings.

I hope this helps:3

A seismograph is placed on the surface of the ground to detect any vibration. Therefore, the given statement is correct.

A seismometer can be described as an instrument that responds to ground noises and shaking such as earthquakes, volcanic eruptions, and explosions. Seismometers are generally attached with a timing device and a recording device to create a seismograph.

The output of such a device is recorded on paper or film, now recorded and processed digitally known as a seismogram. This data is used to locate and characterize earthquakes, and to study the internal structure of the earth.

A seismoscope is used to trigger the device to start recording, and then a recording surface would form a graphical illustration of the tremors automatically.

A seismometer feels the up-down motions of the Earth that move along with any motion detected. The relative motion between the weight and the frame offers a measurement of the vertical ground motion.

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Answer: 844 mm Hg

Explanation:

The level of organization of a complex, multicellular organism such as a mouse, starting with the cell, is. The cellular level, the tissue level, the organ level, the organ system, and lastly the organism.

The level of organization of the body is the organization of the body with the smallest unit like the cell. As we know, the smallest unit of life is the cell. So the organization of energy in living organisms starts with a cell.

The cellular level is the cells, the cell combine to form tissue and many tissues join together to form an organ. Many organs join together to create an organ system, and the organ system establishes an organism.

Thus, starting with the cell, the organization of a complex, multicellular creature like a mouse is. cell level, tissue level, organ level, the organ system, and finally organism level.

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Answer:

In Chemistry, proteins are defined as biomolecules that are essential for the human body to maintain homeostasis. In a PCR test, short for Polymerase Chain Reaction test, scientists are tracking for a certain chemical substance in our body that may be present in the process of protein synthesis or DNA replication that could possibly show if a person is positive for the Corona Virus.Therefor, the relation between Chemistry and the PCR test is that, without Chemistry, the PCR test would not be able to stand on its own, which in other words means the PCR test is dependent upon the presence of Chemistry.