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attashe74 [19]
3 years ago
11

A chemical reaction that releases heat to the surroundings is said to be __________ and has a __________ H at constant pressure

.a) endothermic, positive b) endothermic, negativec) exothermic, negatived) exothermic, positivee) exothermic, neutral
Chemistry
1 answer:
Savatey [412]3 years ago
6 0

Answer:

The correct option is c) exothermic, negative.

Explanation:

Reactions that releases heat to the surroundings are called exothermic, and are characterized by negative entalpy (ΔH) values.

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Examining the equations or equilibrium constants related to a base, salt, or an acid is an indirect way to determine strength of
Gwar [14]

Answer:

1 - Weak electrolyte

2- Non electrolyte

3- Weak electrolyte

4- Strong electrolyte

Explanation:

A strong electrolyte refers to an electrolyte that decomposes completely in solution. This means that there are more charge carriers in solution when a strong electrolyte is dissolved in water. A strong electrolyte produces a strong glow. LiOH is a strong electrolyte.

A weak electrolyte is not completely dissociated in water. Only a small amount dissociates in water. HF is a weak electrolyte. A weak electrolyte does not produce a bright light.

A non-electrolyte does not dissociate in solution at all hence it does not power a bulb E.g  C12H22O11.

7 0
3 years ago
How can you determine if covalent bonding will occur?
Crank
If two nonmetals are bonded together. So look at your periodic table of elements and decide if the two elements that are being bonded are nonmetals or not.
5 0
3 years ago
The term that describes two or more objects in a system reaching the same temperature is
Galina-37 [17]

The correct answer is Thermal Equilibrium

Explanation:

The term "thermal equilibrium" is used when two or more objects have the same temperature and therefore there is not an exchange of heat between them. This occurs when the objects had a different temperature at the beginning but due to a close contact heat is transferred from one object to the other until an equilibrium or same temperature is reached. For example, a hot cup over a table or any other surface will transfer the heat to the surface, but after some time both the cup and the surface will have the same temperature or will reach thermal equilibrium.

7 0
3 years ago
what is the molecular formula of a compound with an empiricla formula of ch and a molecular mass of 78
Dovator [93]

Answer:

C6H6

Explanation:

We can obtain the molecular formula from the empirical formula.

What we need do here is:

(CH)n = 78

The n shows the multiples of both element present in the actual compound. It can be seen that carbon and hydrogen have the same element ratio here. We then use the atomic masses of both elements to get the value of n. The atomic mass of carbon is 12 a.m.u while the atomic mass of hydrogen is 1 a.m.u

(1 + 12)n = 78

13n = 78

n = 78/13 = 6

The molecular formula is

(CH)n = (CH)6 = C6H6

6 0
3 years ago
There’s bots who create questions and then suddenly get a response and there’s me who waits hours for a response. Lol really nic
Furkat [3]
The compositions I hope I helped
5 0
3 years ago
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