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loris [4]
3 years ago
15

What is it called when a substance is in-between two states of matter?

Chemistry
2 answers:
Wittaler [7]3 years ago
7 0

Answer:

There are four natural states of matter: Solids, liquids, gases and plasma. The fifth state is the man-made Bose-Einstein condensates. Solids.

Explanation:

Hope this helps you out!!

Jlenok [28]3 years ago
5 0

Answer:

mesophases.

Explanation:

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Consider the reaction H2CO(g) + O2(g)CO2(g) + H2O(l) Using standard thermodynamic data at 298K, calculate the entropy change for
larisa86 [58]

Answer:

3,116J/K

Explanation:

This question asks to calculate the entropy change of the surroundings.

To do this, we need the standard enthalpy of formation ΔfH° of the reacting species and products first:

We should observe that standard enthalpy if formation of O2 is zero. We proceed with the rest of the species.

H2CO = -109.5KJ/mol

CO2 = -393.5KJ/mol

H2O = -285.8KJ/mol

Now, we calculate the standard change of enthalpy of the reaction as:

ΔHrxn = ΔHproduct - ΔHreactant = (-285.8 - 393.5) +(109.5) = -569.8 KJ/mol

The relationship between the entropy and the standard formation enthalpy is given as

The relationship is:

ΔSosurroundings = - ( ΔHof/ T)

We convert the standard enthalpy of formation to joules first = -569.8 * 10^3 Joules

Using the formula above at a temperature of 298k, the entropy change would be:

-(-569.8 * 10^3)/298 = 1912J/K

Now, we know that 1.63 moles of H2CO reacted. We also need to know the coefficient of the H2CO in the reaction which is 1.

We thus have:

1.63 mol H2CO(g) * (1912J/K * 1 mol H2CO) = 3116J/K

6 0
4 years ago
Please help. <br> Thanks:)
Vedmedyk [2.9K]
D is true because NO2 is a catalyst, and a catalyst is a compound which makes a reaction occur faster (not necessarily more effectively, creating more product, but it decreases the amount of time it takes).
8 0
3 years ago
The graph below shows the speed of a downhill
antoniya [11.8K]

Answer:

16

Explanation:

4 0
4 years ago
One of the main ideas of the Quantum Theory is that:
gladu [14]
The energy of an electron can be change only by set amounts.

The electrons in an energy level of an atom can only move to a higher or lower energy level only if it absorbs or emits a certain amount of energy. If the electron does not have enough energy to move to the next energy level then it will never move.
8 0
3 years ago
Read 2 more answers
How many sulphur atoms are there in 0.125 moles of sulphur
denpristay [2]

Explanation:

There are 6.022x1023 molecules in 1 mole of SO3 (Avogadro's number) so in 0.25 moles, there are (0.25)(6.022x1023) molecules in the 0.25 moles of SO3. or 1.506x1023 molecules per 0.25 moles of SO3.

There is one atom of sulfur in each molecule of SO3. So there are 1.506x1023 atoms of sulfur in 0.25 moles of SO3.

6 0
3 years ago
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