3 years ago

How do decomposes contribute to the nitrogen cycle?

1 answer:

7 0

DECOMPOSERS convert the nitrogen found in other organisms into ammonia and return it to the soil. A few of these type of bacteria return nitrogen to the atmosphere by a process called denitrification, however this amount is small.

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Suppose you have a calorimeter that contains 100.0 grams of water at an initial temperature of 25*C. A salt (2.19 g, 0.020 moles

katen-ka-za [31]

ΔH=MCΔT
ΔH=100 x 4.2 x 4
ΔH=1680

ΔH per mole = ΔH ÷ moles
ΔH per mole = 1680 ÷ 0.02
ΔH per mole= 84000Jmol
84000 ÷ 1000 = 84KJmol

its exothermic as heat is given out into the solution

7 0

4 years ago

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7. How many moles are in 5 x 10 2 atoms of gold?

goblinko [34]

Answer:

8.3028894e-22

Explanation:

5x10^2 atoms/1 x 1 mol/6.022x10^23

7 0

3 years ago

Youll get brainliest !!!

mote1985 [20]

This is a characteristic of a Thermosetting polymer.

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4 years ago

1. Number of planets in our solar system. A. 6 B. 7 C. 8 D. 9

satela [25.4K]

Answer:

Explanation:

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune all 8 planets

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3 years ago

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Calculate the analytical and equilibrium molar concentrations of the solute species in an aqueous solution containing 155 mg of

Cloud [144]

Answer:

The analytical molar concentration is 0,04743M

The equilibrium concentrations are HA = 0,01281M; H⁺ and A⁻ = 0,03462M

Explanation:

The analytical molar concentrations is:

155mg ≡ 0,155g÷163,4g/mol = 9,486x10⁻⁴ moles

9,486x10⁻⁴ moles ÷ 0,020L = 0,04743 M

The trichloroacetic acid [HA] dissociates in water in a 73%, thus:

HA ⇄ H⁺ + A⁻

The equilibrium concentrations are:

HA = 0,04743M ×(100-73)% = 0,01281M

H⁺ and A⁻ = 0,04743M ×73% = 0,03462M

I hope it helps!

8 0

4 years ago