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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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The following balanced equation shows the decomposition of ammonia (NH3) into nitrogen (N2) and hydrogen (H2). 2NH3 → N2 + 3H2 A
Triss [41]
The decomposition of ammonia is characterized by the following decomposition equation:
                                  2NH₃<span>   →   N</span>₂  <span> +   3H</span>₂   

The mole ratio of N₂  :  H₂  is  1  :  3

    If the number of moles of N₂  =  0.0351 mol
    Then the number of moles of H₂  =  0.0351 mol  × 3
                                                         = 0.1053 mol

The number of moles of hydrogen gas produced when 0.0351 mol of Nitrogen gas is produced after the decomposition of Ammonia is  0.105 mol (OPTION 3).

6 0
3 years ago
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Explain in YOUR words what factors determine which type of fossil fuel forms; coal, oil, or gas.
MariettaO [177]

Answer:  three very important kinds of things: coal, oil, and natural gas.

Explanation:

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3 years ago
View Available Hint(s) Check all that apply. Hydrogen bonding occurs when a hydrogen atom is covalently bonded to an NN, OO, or
Sauron [17]

Answer:

Hydrogen bonding occurs when a hydrogen atom is covalently bonded to an NN, OO, or FF atom.

A hydrogen atom acquires a partial positive charge when it is covalently bonded to an FF atom.

A hydrogen bond is possible with only certain hydrogen-containing compounds.

Explanation:

A hydrogen bond does not occur in all hydrogen containing compounds. Hydrogen bonds only occur in those compounds where hydrogen is bonded to a highly electronegative element such as fluorine, oxygen or nitrogen.

In a hydrogen bonded specie, hydrogen acquires a partial positive charge and the electronegative element acquires a partial negative charge which extends throughout the molecule.

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3 years ago
Making jam and dry ice sublimating and becoming a gas are exapleanof what
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Sublimation is a phase transition that occurs when a solid changes into a gas — or, as

Explanation:

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3 years ago
We must __________ forces to calculate net force if the forces are going in OPPOSITE directions.
Virty [35]

Answer:

subtract

Explanation:

To find the net force of two bodies going in opposite directions, we must subtract the forces this is because they are not additive forces.

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  • When forces are directed oppositely on a body, they are subtracted from each other to find the net force.
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