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AysviL [449]
3 years ago
8

Identify each chemical reaction as endothermic or exothermic based on its description. Drag each tile to the correct location. S

odium bicarbonate reacts with citric acid. The temperature of the reaction mixture drops by 6.8°C.Zinc powder is stirred into a beaker containing copper(II) sulfate. The beaker feels warmer to the touch.Carbon in charcoal reacts with oxygen in the air. The reaction produces heat for cooking along with carbon dioxide.The chemical equation for hydrogen reacting with oxygen shows water and energy in the product.Cold packs are used to treat sports injuries. The temperature drop in the cold pack is activated by mixing ammonium nitrate with water.Salt water can treat a sore throat. Pouring salt into the water removes some of the energy from the water.
Chemistry
1 answer:
jasenka [17]3 years ago
6 0
Are there supposed to be images because I don’t see anything?
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Relative to electrons and electron states, what does each of the four quantum numbers specify
Alla [95]

Answer:

(n, l, m sub l, m sub s)

N: principle quantum number (1,2,3,4,etc)

l: angular momentum quantum number, the shape (l has to be at least 1 less than n, but can be 0 depending on n)

M sub l: magnetic quantum number (l determines this number)

M sub s: spin quantum number (can only ever be 1/2 or -1/2)

Explanation:

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Which of the following is the best example of kinetic energy being transformed into potential energy?
galben [10]

Answer:

The correct answer is A

Explanation:

That water stops moving once it gets to the dam and turns into potential energy

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Answer:

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3 years ago
How much heat, in joules, is required to warm a metal disc from 19 °C to 33 °C? The
zalisa [80]

Answer:

Q = 96.6 j

Explanation:

Given data:

Heat required = ?

Initial temperature = 19°C

Final temperature = 33°C

Mass of disc = 3.0 g

Specific heat capacity = 2.3 J/g.°C

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 33°C - 19°C

ΔT = 14°C

Q = 3.0 g×2.3 J/g.°C × 14°C

Q = 96.6 j

3 0
3 years ago
How can water be used as a renewable resource?
Luda [366]

Answer: Water is a reusable resource because it evaporates out of the oceans to clouds, which generate rain falling on the land.

Explanation:

3 0
3 years ago
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