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Delvig [45]
3 years ago
5

Which pack has the greatest change in enthalpy, warm packs (such as hand warmers) or cold packs (such as an ice pack)?

Chemistry
1 answer:
katrin [286]3 years ago
3 0
Enthalpy is the change in energy. A cold pack will react endothermically and enthalpy will be positive and a heat pack will have negative enthalpy. You cannot determine which has more change in enthalpy unless you measure the temperature change. Eg. a heat pack went from 25c to 35c will have greater change in enthalpy then a cold pack going from 25 to 20c because the net temperature difference is greater
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What means that the "p" orbital has 3 orientations?
Vlada [557]

Answer:

The p orbital is a  lobed region describing where an electron can be found, within a certain degree of probability. All p orbitals have l = 1, with three possible values for m (-1, 0, +1).

Explanation:

3 0
3 years ago
According to the rock cycle, which of the following transitions are possible? Assume an unlimited number of steps.
egoroff_w [7]

Answer:

The answer is D

Explanation:

All of these solutions are correct.

7 0
3 years ago
NH4+H2O →NH3+H3O<br><br> Which one is acting weaker base?
Nataliya [291]

Answer:

NH3

Explanation:

In solution, they are in equilibrium. NH4+ acts as a bronsted Lowry acid and donates an H to become NH3, and NH3 acts as a bronsted lowry base and accepts an H. In this pair, NH3 is a weak base, which gets its basic character due to the presence of lone pair of nitrogen and its ability to donate it.

8 0
2 years ago
4.5 moles of sodium sulfate contain how many atoms of sulfur
Hatshy [7]
Chemical Formula of Sodium Sulfate is Na₂SO₄.

As we know, 1 mole of any substance contains 6.022 × 10²³ particles. So, 1 mole of Na₂SO₄ also contains 6.022 × 10²³ formula units of Na₂SO₄.
Also,
                     1 mole of Na₂SO₄ contains  =  6.022 × 10²³ Atoms of S
So,
            4.5 moles of Na₂SO₄ will contain  =  X atoms of S

Solving for X,
                                X  =  (4.5 moles × 6.022 × 10²³ Atoms) ÷ 1 mole

                                X  =  2.70 × 10²⁴ Atoms of S
Result:
            4.5 Moles 
of Na₂SO₄ contains 2.70 × 10²⁴ Atoms of Sulfur.
3 0
3 years ago
Which of the following is true about lava and magma? A Lava and magma are both types of molten rock. B Magma uses waves to break
Gre4nikov [31]

Answer:

a

Explanation:

magma is lava and lava is magma

4 0
3 years ago
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