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Talja [164]
4 years ago
11

Hess’s law is based on what principal?

Chemistry
2 answers:
Liono4ka [1.6K]4 years ago
8 0

makes is possible to calculate H for complicated chemical reactions

Vladimir79 [104]4 years ago
6 0
The first law of thermodynamics.
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What occurs when energy is removed from a liquid-vapor system in equilibrium
yulyashka [42]

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4 0
4 years ago
Which compound when stirred in water will not pass through filter paper?
Schach [20]
In regards to this question, there are no options given to choose from and this makes the question difficult to answer. I hope the answer i am giving is the one you were looking for. The compound Mg(OH)2 when stirred in water will not pass through a filter paper as it is bound to form a sediment. This sediment will get stuck in the filter paper.
6 0
3 years ago
How does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed?
ki77a [65]

Answer:

B. The value of q is positive

Explanation:

8 0
3 years ago
5
Rufina [12.5K]

Answer:

massive flooding occurs in may at this location

Explanation:

i did the quiz idk if its right though :/

5 0
4 years ago
How many molecules of XeF6 are formed from 12.9 L of F2 (at 298 K and 2.6 atm) according to 11) the following reaction? Assume t
ddd [48]

Answer:

#Molecules XeF₆ = 2.75 x 10²³ molecules XeF₆.

Explanation:

Given … Excess Xe + 12.9L F₂ @298K & 2.6Atm => ? molecules XeF₆

1. Convert 12.9L 298K & 2.6Atm to STP conditions so 22.4L/mole can be used to determine moles of F₂ used.

=> V(F₂ @ STP) = 12.6L(273K/298K)(2.6Atm/1.0Atm) = 30.7L F₂ @ STP

2. Calculate moles of F₂ used

=> moles F₂ = 30.7L/22.4L/mole = 1.372 mole F₂ used

3. Calculate moles of XeF₆ produced from reaction ratios …

Xe + 3F₂ => XeF₆ => moles of XeF₆ = ⅓(moles F₂) = ⅓(1.372) moles XeF₆ = 0.4572 mole XeF₆

4. Calculate number molecules XeF₆ by multiplying by Avogadro’s Number  (6.02 x 10²³ molecules/mole)

=> #Molecules XeF₆ = 0.4572mole(6.02 x 10²³ molecules/mole)

                                  = 2.75 x 10²³ molecules XeF₆.

8 0
3 years ago
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