1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kvv77 [185]
3 years ago
14

In a food chain, only 10 % of energy is transferred to the next organism. True or false

Chemistry
2 answers:
snow_lady [41]3 years ago
7 0

Answer: True

Explanation:

garik1379 [7]3 years ago
6 0

Answer:

true

Explanation:

You might be interested in
Your boss asks you to design a room that can be as soundproof as possible and provides you with three samples of material. The o
Nimfa-mama [501]
D. Sample C would be best
6 0
3 years ago
Help please chemistry will give brainliest
Jlenok [28]

Answer:

Explanation:

The Ideal Gas Law states that PV=nRT.

Rearrange that into P/n=RT/V.

In this case, the cylinder is rigid so the volume, V, does not change.

Temperature does not change either.

Out of 450 grams of gas, 150 grams leak out. So only 450-150 = 300 grams is left.

n is number of moles which is dependent on mass:

n1/n2 = 450/300 = 3/2

P1/n1 = RT/V = P2/n2

P2 = P1/n1*n2

= 7.2/3*2

= 4.8 atmosphere

6 0
3 years ago
Read 2 more answers
What is The definition of an organ
aleksandr82 [10.1K]
A part of organism that is typically self contained and have a specific vital
4 0
3 years ago
What 2 types of rock are most common beneath Earth’s crust?*
lora16 [44]
A and C, Igneous and Metamorphic
4 0
3 years ago
Be sure to answer all parts. ΔH o f of hydrogen chloride [HCl(g)] is −92.3 kJ/mol. Given the following data, determine the ident
goldenfox [79]

Answer:

NH₄Cl(s) → NH₃(g) + HCl(g)

ΔH°rxn 74,89 kJ/mol

Explanation:

The change in enthalpy of formation (ΔHf) is defined as the change in enthalpy in the formation of a substance from its constituent elements. For HCl(g):

<em>(1) </em>¹/₂H₂(g) + ¹/₂ Cl₂ → HCl(g) ΔH = -92,3 kJ/mol

It is possible to sum ΔH of different reactions to obtain ΔH of a global reaction (Hess's law).

For the reactions:

<em>(2) </em>N₂(g) + 4H₂(g) + Cl₂(g) → 2NH₄Cl(s) ΔH°rxn = −630.78 kJ/mol

<em>(3)</em> N₂(g) + 3H₂(g) → 2NH₃(g) ΔH°rxn = −296.4 kJ/mol

The sum of -(2) + (3) gives:

<em>-(2) </em>2NH₄Cl(s) → N₂(g) + 4H₂(g) + Cl₂(g) ΔH°rxn = +630.78 kJ/mol

<em>(3)</em> N₂(g) + 3H₂(g) → 2NH₃(g) ΔH°rxn = −296.4 kJ/mol

<em>-(2) + (3) </em>2NH₄Cl(s) → 2NH₃(g) + H₂(g) + Cl₂(g)

ΔH°rxn = +630.78 kJ/mol −296.4 kJ/mol = +334,38 kJ/mol

Now, the sum of -(2) + (3) + 2×(1)

<em>-(2) + (3) </em>2NH₄Cl(s) → 2NH₃(g) + H₂(g) + Cl₂(g) ΔH°rxn = +334,38 kJ/mol

<em>2×(1)  </em>H₂(g) + Cl₂(g)→ 2HCl(g) ΔH = 2×-92,3 kJ/mol

<em>-(2) + (3) + 2×(1) </em>2NH₄Cl(s) → 2NH₃(g) + 2HCl(g)

ΔH°rxn = +334,38 kJ/mol + 2×-92,3 kJ/mol = 149,78 kJ/mol

The reaction of:

<em>NH₄Cl(s) → NH₃(g) + HCl(g)</em>

<em>Has ΔH°rxn = 149,78kJ/mol / 2 = 74,89 kJ/mol</em>

I hope it helps!

4 0
3 years ago
Other questions:
  • Need help please omg Perform each of the following conversions being sure to set up the appropriate conversion factor in each ca
    9·1 answer
  • What is the hardest mineral? <br> A. Feldspar <br> B. Fluorite<br> C. Galena<br> D. Quarts
    11·1 answer
  • What is a pentadihide?
    15·1 answer
  • if 115 G of a substance reacts with 84 grams of another substance what will be the mass of the products after the reaction​
    12·1 answer
  • What is the ph of a 1.00 molar solution of nac2h3o2(aq)? the ka for acetic acid (hc2h3o2) is 1.8 Ã 10-5. entry field with correc
    11·1 answer
  • How much time would it take for 336 mg of copper to be plated at a current of 5.6 A ? Express your answer using two significant
    9·1 answer
  • How many moles are there in 140.g of potassium bromid
    8·1 answer
  • What does a computational geneticist do?
    5·1 answer
  • in which level of organization would the roots of a plant most likely be classified? Please explain too
    5·1 answer
  • A(1,2),B(1,4),C(6,2),
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!