Which type of organism helps return nutrients from dead plants and animals to the soil. A producer. B prey. C predator. D decomposer

Answers

Answer 1

Answer: The answer is D. Decomposer

Answer 2

Answer: The answer is 'decomposer.'

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A red shift in the spectrum of the light from an object indicates the object is moving ____ you.

Answers

Away from you. This is known as the Doppler affect. It basically states that if an object is moving away from you the streching of the wave causes a red shift and if the object is moving towards you the compression of the waves causes a blue shift.

Regardless of how it is prepared or where a sample is collected from, water is always composed of 88.8% oxygen and 11.2% hydrogen by mass. this is an illustration of the

Answers

Answer:- Law of definite proportions.

Explanations:- The chemical composition of a compound is always constant means it contains the same elements in exactly same proportions by mass. This is called "Law of definite proportions."

Molecular formula of water is $H_2O$ . It has two hydrogen atoms and one oxygen atom. Atomic mass of H is 1.008 and that of oxygen atom is 15.999.

Molar mass of water = 2(1.008) + 15.999 = 18.015

mass percentage of H = $((2.016)/(18.015))100$ = 11.2%

mass percentage of O = $((15.999)/(18.015))100$ = 88.8%

These percentages are always fix, no matter from where the sample of water is collected.

Describe a polyhydroxyl alcohol.

Answers

To know that a certain compound is classified as an alcohol is through it molecular equation. Alcohols have at least 1 -OH or hydroxyl attachment. When we say polyhydroxyl that means there is 2 or more hydroxyl group in the structure of an alcohol. Ethylene glycol is an example.

A polyhydroxyl alcohol is an alcohol that has two OH molecules attached. A regular alcohol has only one.

At equilibrium, a sample of gas from the system is collected into a 4.00 L flask at 600 K. The flask is found to contain 3.86 g of PCl₅, 12.7 g of PCl₃, and 13.3 g of Cl₂. What are the values of Kc and Kp for this reaction?

Answers

Answer:

Explanation:

PCl₅ ⇄ PCl₃ + Cl₂

1 mole 1 mole 1 mole

molecular weight of PCl₅ = 208.5

molecular weight of PCl₃ = 137.5

molecular weight of Cl₂ = 71

moles of PCl₅ = .0185

moles of PCl₃ = .0924

moles of Cl₂ = .1873

Total moles = .2982 moles

mole fraction of PCl₅ = .062

mole fraction of PCl₃ = .31

mole fraction of Cl₂ = .628

If total pressure be P

partial pressure of PCl₅ = .062 P

partial pressure of PCl₃ = .31 P

partial pressure of Cl₂ = .628 P

Kp = .31 P x .628 P / .062 P

= 3.14 P

To calculate Total pressure P

PV = nRT

P x 4 x 10⁻³ = .2982 x 8.31 x 600

P = 371.7 x 10³

= 3.717 x 10⁵ Pa

Kp = 3.14 P = 3.14 x 3.717 x 10⁵ Pa

= 11.67 x 10⁵ Pa

Kp = Kc x $( RT )^(\triangle n)$

$\triangle n$ = 1

11.67 x 10⁵ = Kc x $( 8.31* 600 )^(1)$

Kc = 234

Which of the following is not an example of a chemical change?.

Answers

Well, I can tell you what a chemical change is and you can get your answer from there. A chemical change is when the very make up of the item is totally changed and can not be changed back. When one compound is converted into a totally new compound having different chemical properties. So... melting an ice cube would be physical and not chemical. Crumbling up a piece of paper would be physical becasue if you uncrumble it, it's still a piece of paper. But Burning paper would be considered chemical becasue now it's ash and you can't get that piece of paper back. I hope this helps!! c:

Answer:

Baking cake

Explanation:

U welcome

What are metalloids? Give examples.