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3 years ago

A property of a substance that is the same no matter what size of sample is tested is _____.

Chemistry

1 answer:

KengaRu [80]3 years ago

6 0

Answer:

B.) an intensive property

Explanation:

Bc it is a Characteristic Property that won't change no matter what size of sample is tested

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Which is an example of a condition in which homeostasis is maintained using a negative feedback loop?

Novosadov [1.4K]

A. low blood glucose is an example of a condition in which homeostasis is maintained using a negative feedback loop

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3 years ago

True Or False: A law is a proven fact.

antiseptic1488 [7]

Answer:

True

Explanation:

It only becomes a law when someone has proved it, or else it's just a theory.

8 0

3 years ago

Cells that exhibit a positive stain with acid phosphtase that is not inhibited with tartaric acid are characteristically seen in

Fantom [35]

Answer:

Hairy cell leukaemia

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3 years ago

After 7.9 grams of sodium are dropped into a bathtub full of water how many grams of hydrogen gas are released

Nataliya [291]

Answer:

The grams of hydrogen gas that are released is 0.343 gram

Explanation:

Given that:

2 Na + 2h₂0 ⇒ 2Na0H +N₂

Molecules of Na = 7.9/2.3 = 0.343 mol Na

Now,

2 molecules of Na produces one mole h₂

0.343 mol of Na produce 0.343/2 = 0.1717 mol h₂

h2 = molecules * mw (molecular weight) =0.1717 * 2 =0.343 grams

Therefore the grams of hydrogen gas released is = 0.343 grams

6 0

4 years ago

During an exothermic chemical reaction, a solid is consumed and a gas produced. a. Yes b. No c. Can't decide with information gi

kiruha [24]

Answer: The given statement is true.

Explanation:

For the reaction to be spontaneous, the Gibbs free energy of the reaction must come out to be negative.

The equation used to calculate Gibbs free energy follows:

$\Delta G=\Delta H-T\Delta S$

Exothermic reactions are defined as the reactions in which energy is released in the form of heat. The enthalpy change $(\Delta H)$ of the reaction comes out to be negative for this kind of reaction.

Entropy change is defined as the change in the measure of randomness in the reaction. It is represented as $(\Delta S)$ . Randomness of gaseous particles is more than that of liquid which is further more than that of solids.

We are given:

A solid substance is converting into a gaseous substance.

$\text{Solid}\rightarrow \text{Gas}$

As, the entropy is increasing. So, the entropy change is positive.

Thus, the above reaction is spontaneous. $\Delta G=-ve-(+ve)\\\\\Delta G=-ve$

Hence, the given statement is true.

4 0

4 years ago