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3 years ago

7

Looking at the periodic table, which group consists of elements that will not form an acid when combine with hydrogen?

2 answers:

PSYCHO15rus [73]3 years ago

5 0

Looking at the periodic table, which group consists of elements that will not form an acid when combine with hydrogen?

Sodium group - Reacts vigorously with water.

Magnesium group - Shiny, silvery, soft metal.

Fluorine group - Forms an acid in solution when combined with hydrogen.

Xenon group - Colorless and odorless gas.

A) radon, neon, calcium

B) neon, bromine, barium

C) beryllium, iodine, krypton

D) lithium, potassium, fluorine

The answer is A) radon, neon, calcium

Rainbow [258]3 years ago

3 0

Group 8 nonmetals; <span>He, Ne, Ar, Kr, Xe, and Rn</span>

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3 years ago

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A chemist measures the energy change ?H during the following reaction:

slamgirl [31]

Answer:

Endothermic

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Explanation:

Let's consider the following thermochemical equation.

2 H₂O(l) → 2 H₂(g) + O₂(g) ΔH = 572 kJ

Since ΔH > 0, the reaction is endothermic, that is, it absorbs heat when H₂O reacts.

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Calculate the quantity of energy required to change 8.22 mol of liquid water to steam at 100oc. the molar heat of vaporization o

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Since the water is at 100 degrees then it take 40.6 kj/mol to change 1 mole of water at 100 degrees into steam at 100 degrees
the moles of water 8.22mol
since one mole take 40.6kj/mol 8.22mol will be =
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Answer:

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