Can someone help me please, I think it may be B but i'm not sure..

Answer:

Please Mark as Brainliest!!!!!!!

Explanation:

Answer is  in the below image

Answer:

(NH4)2Cr2O7 → N2 + 4 H2O + Cr2O3

Hope this helps :)

Answer:

Regulation of body temperature

Explanation:

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:

Biology

Explanation:

Answer:biology

Explanation:

Answer:

C) Budding

Explanation:

Budding is define as when a new organism is formed from the same organism is known as Budding

Answer: chemical

Explanation: Chemical changes and physical changes keep it the same.

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:

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.

Learn more about gravity, here:

https://brainly.com/question/2888262

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Answer:crust, outer core, inner core, mantle

Explanation:

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.

Explanation:

found near the equator usually is the tropical forest

Answer:

Tropical rain forests and savannas

Explanation:

Did the test on Edge 2021

Answer:

B. 16g

Explanation:

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:

P₂ = 3.68 atm

Explanation:

Given data:

Initial volume of sample = 16 L

Initial pressure = 4.6 atm

Final pressure = ?

Final volume = 20 L

Solution:

The given problem will be solved through the Boly's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

4.6 atm × 16 L = P₂ × 20 L

P₂ = 73.6 atm. L/ 20 L

P₂ = 3.68 atm

Answer:

the time taken for the radioactivity of a specified isotope to fall to half its original value.

Explanation:

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.

The answer is B hydro sphere

Sweating helps you cool down and prevent you from overheating mark me brainliest plz

Explanation:

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:

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:

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:

B. Adenosine diphosphate

Explanation:

You already have the right answer ^^

The question is incomplete, the complete question is;

Ethan filled 10 cups of the same size with equal amounts of water. He divided the  cups into five groups of two cups each. The groups were placed in five different locations around  his house. After two weeks, he measured the remaining water to determine how much had  evaporated, by measuring how much water remained in each cup.

What is the dependent (data) variable?

A. Location of cups

B. Amount of time they were left in locations

C. Amount of evaporated water

D. Size of cups

Answer:

C. Amount of evaporated water

Explanation:

The dependent variable is the outcome that is measured or observed in an experiment. In this case, the variable that is being observed is the amount of water left in each cup.

Depending on its location, the amount of water in different locations may not be the same. Therefore, the amount of water left in each cup is regarded as the dependent variable here.

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:

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