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aleksandr82 [10.1K]
3 years ago
9

How do scientsts determine is a newly found thing is dead or alive.

Chemistry
1 answer:
butalik [34]3 years ago
4 0

The substance is dead or alive is determined by response or consciousness of the substance to external stimulus.

<h3><u>Explanation</u>:</h3>

The living organisms do have several characteristics. They are growth, reproduction, consciousness etc. But among them, consciousness is the only feature that's confined within only the living world. No non living things have this feature.

So if the scientist can find that the substance found have some response to external stimulus, then it does have life. And if it doesn't response to any sort of external stimulus, then it doesn't have life.

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Entropy increase from solid to liquid to gas. T/F
mariarad [96]

Answer: True

Explanation:

Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

\Delta S is positive when randomness increases and \Delta S is negative when randomness decreases.

When the solid changes to liquid to gas ,the randomness of particles increases and hence \Delta S is positive and thus the entropy increases.

8 0
3 years ago
Read 2 more answers
How many moles of sodium bicarbonate are in 1.50 kg of the compound?
salantis [7]

Answer:

n=17.85 moles

Explanation:

Given mass is, m = 1.5 kg = 1500 g

The molar mass of sodium bicarbonate is, M = 84.007 g/mol

We need to find the no of moles in 1.5 kg of Sodium bicarbonate . We know that, no of moles is equal to given mass divided by molar mass.

n=\dfrac{m}{M}\\\\n=\dfrac{1500}{84.007 }\\\\n=17.85

<h2>So, there are 17.85 moles in 1.5 kg of Sodium bicarbonate.</h2>
3 0
3 years ago
Please look at photo provided and help answer. Due soon please help!!!
saul85 [17]

Answer:

a. 6 mol of oxygen

b. 10 mol of iron(III)oxide

Explanation:

Use mole concept.

3 0
2 years ago
What is the half-life of a product?
Nataly [62]
The expectancy of how long a product will last divided by two!
5 0
3 years ago
Sugar dissolves readily in water because it is a(n) ____ substance.
Mnenie [13.5K]
The answer to this question would be D. Hydrophilic.

The word hydrophilic mean attracted by water. That means the molecule has a force to attract water molecule, thus be able to dissolve in water.  The polarity of the molecule would determine whether a molecule hydrophilic or not.
Its opposite would be hydrophobic which the molecule can't dissolve in water.  One example of this would be oil or fat. That is why sometimes it is called lipophilic too.
3 0
3 years ago
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