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nata0808 [166]
2 years ago
13

1. The hydrogenation of ethene gas at 298 K shows a decrease in disorder (AS-120.7 J/mol-K) during an exothermic reaction ( Delt

a H^ =-136.9 k/mol . Determine whether the reaction is spontaneous or nonspontaneous by calculating Delta * 0 degrees
Chemistry
1 answer:
Anna71 [15]2 years ago
8 0
K shows a decrease in disorder (AS = -120.7 J/(mol-K)) during an exothermic reaction (AH' = -136.9 kJ/mol). Determine whether the reaction is spontaneous or ...
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When 2.35 g of potassium reacts with excess water, what mass of hydrogen gas is formed?
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Answer:

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Two groups of students were tested to compare their speed working math problems. Each group was given the same problems. One gro
jeka57 [31]
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3 years ago
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Match each of the following descriptions to thecorrect element listed
Slav-nsk [51]

Answer: Please see explanation for answer

Explanation:Matching the  descriptions to the correct element listed gives

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Bromine      Halogens   17          Non metal Not found as a free element (uncombined) in nature, reddish-brown liquid that vaporizes readily at room temperature to a red gas with a strong disagreeable odor.

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Potassium   Alkali Metals   1   Metal  Soft, easily cut with a knife to expose a silvery surface that rapidly oxidizes in air; never found uncombined in nature

Silicon    Carbon family     1`4  Metalloid   Metallic luster and grayish solid, very common in rocks and gemstones such as amethyst and opal, semiconductor

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4 0
3 years ago
PLEASEEE HELP NOW!!! 60 BRAINLIEST!!
algol13

Answer:

When the net force is balanced

Explanation:

Remeber taking physics and doing this

8 0
3 years ago
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How many atoms are in 2.70 moles of iron (Fe) atoms?
vredina [299]
The answer is <span>1.63 × 1024 atoms Fe.
</span>

Avogadro's number is the number of units (atoms, molecules) in 1 mole of substance:

<span>6.023 × 10²³ atoms per 1 mole
</span>So, how many atoms are per 2.70 moles:

6.023 × 10²³ atoms : 1 mole = x : 2.70 moles
x = 6.023 × 10²³ atoms * 2.70 moles : 1 mole
x = 16.3 × 10²³ = 1.63 × 10 × 10²³ = 1.63 × 10²⁴ atoms


3 0
3 years ago
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