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Harrizon [31]
3 years ago
9

What type of a solid contains particles that are jumbled and form no particular pattern?

Chemistry
1 answer:
zimovet [89]3 years ago
5 0

Amorphous solids have two characteristic properties. When cleaved or broken, they produce fragments with irregular, often curved surfaces; and they have poorly defined patterns when exposed to x-rays because their components are not arranged in a regular array. An amorphous, translucent solid is called a glass

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What happens to excess heat produced in the muscle during contraction and relaxation
Afina-wow [57]

Answer:

Calcium is then pumped back into the sarcoplasmic reticulum breaking the link between actin and myosin.

Explanation:

Actin and myosin return to their unbound state causing the muscle to relax. Alternatively relaxation (failure) will also occur when ATP is no longer available.

3 0
3 years ago
The decomposition of hydrogen peroxide is catalyzed by iodide ion. The catalyzed reaction is thought to proceed by a two-step me
slega [8]

Answer:

The two-step mechanism is a slow mechanism and a fast mechanism. When we combine them, the result is

2H₂O₂ (aq) ⇒2H₂O (l) + O₂ (g)

Explanation:

We know that the decomposition of hydrogen peroxide is catalyzed by iodide ion, which means that the iodide ion will react with the hydrogen peroxide. There is a slow mechanism and a fast one:

H₂O₂(aq) + I₋(aq) ⇒ H₂O(l) + IO₋(aq) this is the slow reaction

IO₋(aq) + H₂O₂(aq)⇒ H₂O(l) + O₂(g) + I₋ (aq) this is the fast reaction

If we cancel the same type of molecules and ions, the final result is:

2H₂O₂ (aq) ⇒2H₂O (l) + O₂ (g)

3 0
4 years ago
Which type of acetylcholine receptor is present on postganglionic neurons
Sonja [21]

Answer:

Mescarinic and Nicotinic

Explanation:

Postganglionic fibers can be present in both sympathetic and parasympathetic divisions, their main difference resides in how in the sympathetic division the postganglionic fibers are adrenergic and use norepinephrine (noradrenalin) as a neurotransmitter, in the parasympathetic division, on the other hand, fibers are cholinergic and use acetylcholine as a neurotransmitter, the<em> postganglionic neurons of sweat glands release acetylcholine for the activation of muscarinic receptors, another kind of receptor for acetylcholine are nicotinic receptors </em>that act as transmembrane sodium/potassium channels, while muscarinic receptors need to act through intracellular proteins.

I hope you find this informatiou useful and interesting! Good luck!

4 0
3 years ago
Chlorophyll a is one of the green pigments found in plants. Chlorophyll a has the molecular formula C55H72MgN4O5. How many atoms
algol13
The number of atoms in a molecule can be calculated by adding all of the number of elements from the chemical formula. For chlorophyll, the chemical formula would be <span>C55H72MgN4O5 adding all the elements we have 137 atoms. Hope this answers the question.</span>
8 0
3 years ago
1) How many moles of gas occupy 58 L at a pressure of 2.2 atmospheres and a temperature
Sergio039 [100]

Here, we need to solve this problem using Ideal gas law ( PV=nRT).

Where –

  • P = Pressure in atm
  • V = Volume in L
  • n = moles
  • R = Ideal gas law constant
  • T = Temperature in K

<u>Now, according to the question </u>–

  • V = 58 L
  • P = 2.2 atm
  • T = 313 K
  • R = 0.0821 atm L/ mol K

<u>Calculation</u> –

\qquad \pink{\twoheadrightarrow\bf PV = nRT}

\qquad \twoheadrightarrow\sf n = \dfrac{PV}{RT}

\qquad \twoheadrightarrow\sf  n = \dfrac{ 2.2 \: \:\times 58 \: } {0.0821  \times 313}

\qquad \twoheadrightarrow\sf  n = \dfrac{ 2.2 \times 58}{0.0821 \times 313}

\qquad \twoheadrightarrow\sf  n =\dfrac{127.6}{25.7}

\qquad \pink{\twoheadrightarrow\bf  n = 4.9656 \: moles }

_______________________________________

8 0
3 years ago
Read 2 more answers
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