Help fast this is my last question I have to do​

Answer:

matter/mass is made up of anything you see touch and fell

Answer:

The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson. The atomic number of an element is the number of protons in the nucleus of an atom of that element.

Answer:

The mass of water is expressed in grams (g) or kilograms (kg), and the volume is measured in liters (L), cubic centimeters (cm3), or milliliters (mL). Density is calculated by the dividing the mass by the volume, so that density is measured as units of mass/volume, often g/mL.

Answer:

Biology

Explanation:

Answer:biology

Explanation:

Answer:

Please Mark as Brainliest!!!!!!!

Explanation:

Answer is  in the below image

Answer:

12.5655

Explanation:

divide by 100

Answer:

12.5655

Explanation:

To find the answer you need to move the decimal place left two times <3

Answer:

44

Explanation:

multiply 22 x 2, and 50 x 2, so 50 x 2 would be 100 and 22 x 2 would

be 44.

Answer:

here's the procedure to find it friend

Explanation:

How do you find the mass in grams of an atom?

In order to determine the mass of one atom of an element, you must determine its molar mass, which is its atomic weight on the periodic table in g/mol, and you need to know the relationship between moles and the number of atoms: 1 mol of atoms = 6.022×1023 atoms . Then divide the molar mass by 6.022×1023 atoms/mol .

Answer:

hydrogen

oxygen

hydrogen is easily identified by a any liqiud substance

hydrogen=liquid

oxygen is also easily identified by air

oxygen=air

Answer:

Honestly this is the first question I’m stumped on

Explanation:

Answer:

Plants respond directly to Earth's gravitational attraction, and also to light. Stems grow upward, or away from the center of Earth, and towards light. Roots grow downward, or towards the center of Earth, and away from light. This process turns the stem so that it once again grows upward, presumably toward the light.

Explanation:

Answer:

This question is incomplete; the complete part is: What scientific practice is Rhonda performing?

The answer is ASKING A QUESTION FROM AN OBSERVATION

Explanation:

The SCIENTIFIC METHOD is used for scientific investigations. The scientific method is composed of sequential steps which scientific investigations follow. The steps are:

- Asking a question/Make an observation

- Formulating a hypothesis

- Testing the hypothesis

- Analysing the result

- Conclusion

Asking a scientific question is done after making an observation about an occurrence. In this question, Rhonda wondered what effect the air pressure at high altitudes has on the volume of gas in balloons after watching a video taken by a camera that was lifted into the upper atmosphere by a weather balloon. This illustrates that Rhonda is ASKING A QUESTION FROM AN OBSERVATION.

Answer:

Both objects are in physical contact with each other

Explanation:

Conduction refers to the flow of heat from one object to another when the both objects are in contact with each other.

Hence, before heat can flow from one object to another, the two objects must be in contact with each other. This is a key requirement before conduction can take place.

Answer:

The final total pressure in the cylinder = 8.53 atm

Explanation:

From the information given:

The volume of liquid ethanol = 22.5 mL

The density of the liquid ethanol = 0.789 g/mL

The volume of the cylinder = 10.0 L

The pressure of the cylinder = 4.50 atm

The temperature of the cylinder = 25°C = (273.15 + 25) K = 298.15 K

Using the ideal gas equation:

PV = nRT

where n is the number of moles before the reaction:

[tex]n = \dfrac{PV}{RT}[/tex]

[tex]n = \dfrac{4.5 \ \times 10 }{0.08205 \times 298.15}[/tex]

n = 1.8395 moles

Recall that:

Density = mass /volume

Thus; the mass of liquid ethanol = (Density × volume ) of liquid ethanol

the mass of liquid ethanol = 0.789g/mL  × 22.5 mL

the mass of liquid ethanol = 17.7525 g

Since we know the mass of the liquid ethanol =  17.7525 g and the standard molar mass of liquid ethanol = 46.07 g/mol

Then:

the number of moles of liquid ethanol = 17.7525 g / 46.07 g/mol

the number of moles of liquid ethanol = 0.38534 mol

The chemical equation for the reaction can be represented as:

[tex]C_2H_5OH + 3O_2 \to 2CO_{2(g)} + 3H_2O_{(g)}[/tex]

From above 1 mole of ethanol react with 3 moles of oxygen to produce 2 moles of carbon dioxide and 3 moles of water

Since each mole of ethanol reacts with 3 moles of oxygen

Then:

0.38534 mol of ethanol = (0.38534 mol × 3) oxygen

Therefore, the amount of oxygen molecule left in the cylinder after the reaction = 1.8395 mol - (0.38534 mol × 3)

= 1.8395 mol - 1.15602 mol

= 0.68348 mol

The number of moles of carbon dioxide formed = 2 × moles of ethanol

number of moles of carbon dioxide formed =  2 × 0.38534 mol

number of moles of carbon dioxide formed =   0.77068 mol

The number of moles of water vapour formed = 3 × 0.38534 mol

The number of moles of water vapour formed = 1.15602 mol

∴

The total moles of gas = moles of oxygen left + moles of water vapour + moles of carbon dioxide

The total moles of gas =  0.68348 mol + 0.77068 mol + 1.15602 mol

The total moles of gas = 2.61018 mol

Finally, to find the total pressure in the cylinder when the temperature is 125°C = (273.15 + 125)K

= 398.15 K

Then; using the ideal gas equation PV = nRT

P = nRT/V

P = ( 2.61018  × 0.08205 × 398.15 ) / 10

P = 85.2699/10

P = 8.52699 atm

P ≅ 8.53 atm

Answer:

The statement is a description of something that happens, not an explanation of why it happens.

Explanation:

A px

The statement "Dropped objects fall toward the ground" is a law and not a theory given by Newton sir as he was sitting under s tree and apple falls on the earth which he observed and gravity is observed from there only.

The gravity is the strongest force of attraction between the surface of the earth and in the each substance or object present on the earth.

According to the law of Newton sir the gravitational force of the earth depends on the mass of the object if the mass of object is double then the gravitational force of the earth is also double.

Therefore, statement "Dropped objects fall toward the ground" is a law and not a theory given by Newton sir as he was sitting under s tree and apple falls on the earth which he observed and gravity is observed from there only.

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Answer:

Where is the following?

Explanation:

The formula for speed is speed = distance ÷ time. To work out what the units are for speed, you need to know the units for distance and time. In this example, distance is in meters (m) and time is in seconds (s), so the units will be in meters per second (m/s).

Answer:

Speed = Distance / Time

Explanation:

Distance = Speed * Time

Time = Distance / Speed

Use this chart to help you remember. Cover what you don't have. If it is next to each other, multiply. If one is on top, divide what is on top with the one on the bottom.

Answer:

a

Explanation:

The main subject of study in thermodynamics is the energy changes in a reaction or a system.

Generally speaking, thermodynamics is a branch of science that deals with the study of heat, work, temperature, and the energy of systems and how this energy is converted from one form to another. The subject of thermodynamics is governed by a series of laws known as the law of thermodynamics.

The correct option is a.

Answer:

Regulation of body temperature

Explanation:

Answer:

Atoms are single neutral particles.

Molecules are neutral particles made of two or more atoms bonded together.

Answer:

a molecule is made up of atoms bonded together so while an atom is its own separate entity a molecule is what you get when those atoms bond together. these might be the same elements such as two oxygen Atoms bonded together (O2), or it might be different Atoms bonded together like water(H20)

Answer:

The Lewis dot structure for Magnesium is an Mg with 2 dots which stand for its two valence electrons. The Lewis dot structure for Sulfur is an S with 6 dots which stand for its six valence electrons. ... The Magnesium atom has a +2 charge and the Sulfur atom has a -2 charge.

Explanation:

Explanation:

found near the equator usually is the tropical forest

Answer:

Tropical rain forests and savannas

Explanation:

Did the test on Edge 2021

Answer:

digestion and respiration

Answer:

I think the answer is: Cell

Explanation:

im not sure but i think its cell

Answer:

B. 16g

Explanation:

Answer:

sodium??

Explanation:

a. The atomic size of fluorine is very small compared to other halogens. Similarly, fluorine is the highest electronegative atom in periodic table. b.  CIF a T-shaped structure is asymmetric with dipoles that do not cancel out but produce a net dipole.

In a compound with atoms of significant difference in electronegativities, the shared pair of electrons attracts towards the more electronegative atom and this results in a charge separation. The measure of the separation of two electrical charges is called the dipole moment of the compound.

a. Fluorine is the most electronegative atom in periodic table. Compared to other halogens, F has very small atom and have less electron affinity compared to other halogens.

b. Cl - F is an interhalogen compound in which dipole moment  is created by the electronegativity difference between Cl and F. The net dipole moment is towards the F atom.

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Answer:

valence electrons are determine by the numbers at the top of the grop so group 1 has 1 valence electron, group 2 has 2 valence electrons, groups 3-12 have no valence electrons, group 13 has 3 valence electrons, group 14 has 4 valence electrons, group 15 has 5 valence electrons, group 16 has 6 valence electrons, group 17 has 7 valence electrons and group 18 has 8 valence electrons exept helium. helium has 2 valence electrons.

Explanation:

Answer:NaCl is a salt.

Explanation:

Answer:

It is salt

Explanation: