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3 years ago

PLEASE HELP!!! I am taking a college chem class as a junior and have no idea how to do this!

Chemistry

1 answer:

kondaur [170]3 years ago

4 0

Where’s the questions hun? I don’t even see the questions you need answered

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What is the name of the scientist who first proposed that atoms have a nucleus

Archy [21]

__Ernest Rutherford__

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3 years ago

Which evidence is an indication that a chemical reaction has occurred?

brilliants [131]

A. Formation of a gas. You can tell a chemical reaction has occurred through: formation of a precipitate, formation of a gas (also known as bubbles) unexpected color change, unexpected odor change, temperature change.

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3 years ago

If a molecule contains polar bonds the molecule __ must be polar overall

weeeeeb [17]

Answer:

diatomic

Explanation:

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3 years ago

What volume will 2.00 moles of nitrogen occupy at 720 torr and 20C?

bija089 [108]

Answer:

50.62L

Explanation:

1torr= 0.00132atm

P=720torr = 0.95atm

V= 20°C= 20+273= 293K

PV=nRT

R=0.08206L-atm/mol-K

0.95×V= 2×0.08206×293

V= 2×0.08206×293/ 0.95

V= 50.62L

3 0

4 years ago

Identify the oxidized substance, the reduced substance, the oxidizing agent, and the reducing agent in the redox reaction. Cu(s)

spin [16.1K]

Answer: Copper is getting oxidized and is a reducing agent. Silver is getting reduced and is oxidizing agent.

Explanation:

Oxidation reaction is defined as the reaction in which an atom looses its electrons. Here, oxidation state of the atom increases.

$X\rightarrow X^{n+}+ne^-$

Reduction reaction is defined as the reaction in which an atom gains electrons. Here, the oxidation state of the atom decreases.

$X^{n+}+ne^-\rightarrow X$

Oxidizing agents are defined as the agents which oxidize other substance and itself gets reduced. These agents undergoes reduction reactions.

Reducing agents are defined as the agents which reduces the other substance and itself gets oxidized. These agents undergoes reduction reactions.

For the given chemical reaction:

$Cu(s)+2AgNO_3(aq.)\rightarrow 2Ag(s)+Cu(NO_3)_2(aq.)$

The half reactions for the above reaction are:

Oxidation half reaction: $Cu(s)\rightarrow Cu^{2+}(aq.)+2e^-$

Reduction half reaction: $2Ag^+(aq.)+2e^-\rightarrow 2Ag(s)$

From the above reactions, copper is loosing its electrons. Thus, it is getting oxidized and is considered as a reducing agent.

Silver is gaining electrons and thus is getting reduced and is considered as an oxidizing agent.

4 0

4 years ago