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3 years ago

15 15. Which two elements will form a covalent bond?

Chemistry

1 answer:

Nitella [24]3 years ago

3 0

Answer:

K and Cl

Explanation:

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Who was the first person to invent plastic, and what was their purpose for inventing it?

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Answer:

Leo Hendrik Baekeland

Explanation:

Baekeland discovered Bakelite, the first successful plastic, but wanted to make a more better and more heat resistant plastic.

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3 years ago

प्रश्न 01. बेकिंग सोडा बनाने के लिए आवश्यक सामग्री निर्माण की विधि एंव रासायनिक समीकरण लिखिए।

salantis [7]

Answer:

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3 years ago

Write a balanced half-reaction for the reduction of dichromate ion to chromium ion in acidic aqueous solution. Be sure to add ph

Serhud [2]

Answer:

The balanced half-reaction for the reduction of dichromate ion to chromium ion in acidic aqueous solution:

$Cr_2O_7^{2-}(aq)+14H^+(aq)+6e^-\rightarrow 2Cr^{3+}(aq)+7H_2O(l)$

Explanation:

The reaction :

$Cr_2O_7^{2-}\rightarrow Cr^{3+}$

Balancing of reaction in an acidic medium:

Step 1: Balance the atoms in the reaction:

$Cr_2O_7^{2-}(aq)\rightarrow 2Cr^{3+}(aq)$

Step 2: Balance oxygen atom by adding water on the side where no oxygen or less oxygen atom is present;

$Cr_2O_7^{2-}(aq)\rightarrow 2Cr^{3+}(aq)+7H_2O(l)$

Step 3: Balance the hydrogen atom by adding hydrogen ions on the side where water is absent:

$Cr_2O_7^{2-}(aq)+14H^+(aq)\rightarrow 2Cr^{3+}(aq)+7H_2O(l)$

Step 4: Now balance charge by adding electrons on the side where more positive charge is present

$Cr_2O_7^{2-}(aq)+14H^+(aq)+6e^-\rightarrow 2Cr^{3+}(aq)+7H_2O(l)$

The balanced half-reaction for the reduction of dichromate ion to chromium ion in acidic aqueous solution:

$Cr_2O_7^{2-}(aq)+14H^+(aq)+6e^-\rightarrow 2Cr^{3+}(aq)+7H_2O(l)$

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3 years ago

A mass of 80 grams of Bromine would be

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I’m pretty sure it’s a

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3 years ago

Earth's oceans absorb carbon dioxide emitted by humans and other animals, and eventually turn it into carbonate rocks. Which "sp

Likurg_2 [28]

A. biosphere
C. geosphere
E. atmosphere
F. hydrosphere

Earth's oceans absorb carbon dioxide emitted by humans and other animals, and eventually turn it into carbonate rocks. Which "spheres" are part of thisprocess? Select all that apply.

NOT:
B. exosphere
D. cryosphere

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3 years ago

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