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zysi [14]
3 years ago
15

Why are frogs said to have two lives

Chemistry
2 answers:
alexgriva [62]3 years ago
4 0
Amphibian means two-lives,<span> </span>Frogs<span> begin their </span>lives<span> in the water as eggs and then tadpoles after they get big enough </span><span>they are fully developed they live on land.</span>
Finger [1]3 years ago
4 0
They begin their lives in the water and then tadpoles after they get big enough they live on land.
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2NO + 3MnO2 + 4H â 2NO3- + 3Mn2 + 2H2O For the above redox reaction, assign oxidation numbers and use them to identify the eleme
mixer [17]

Answer:

Manganese decreases from 4+ to 2+ (reduced and oxidizing agent) and nitrogen increases from 2+ to 5+ (oxidized and reducing agent).

Explanation:

Hello there!

In this case, according to the given redox reaction, we rewrite it as a convenient first step:

2NO + 3MnO_2 + 4H^+ \rightarrow 2NO_3^- + 3Mn^{2+} + 2H_2O

Next, we assign the oxidation numbers as follows:

2N^{2+}O^{2-} + 3Mn^{4+}O^{-2}_2 + 4H^+ \rightarrow 2(N^{5+}O^{2-}_3)^- + 3Mn^{2+} + 2H^+_2O^{2-}

Thus, we can see that both manganese and nitrogen undergo a change in their oxidation number, the former decreases from 4+ to 2+ (reduced and oxidizing agent) and the latter increases from 2+ to 5+ (oxidized and reducing agent).

Regards!

4 0
2 years ago
Which term describes a chemical equation in which all highly soluble compounds are written as dissociated ions
BartSMP [9]

Answer: IONIC EQUATION.

Explanation:

A chemical equation is defined as the form by which a chemical reaction is represented mathematically. These are written in the form of symbols and chemical formulas of reactants and products which are taking part in the chemical reaction. A chemical equation can be written in two forms, these include:

--> MOLECULAR EQUATION: in this type of equations, the compounds are written and represented in a molecular form. This is sometimes referred to as a balanced equation.

--> IONIC EQUATION: This is a type of chemical equation in which the electrolytes in aqueous solution are expressed as dissociated ions. A typical illustrated example is seen in the reaction between AgNO3(aq) and NaCl(aq) :

Ag+(aq) + NO3-(aq) + Na+(aq) + Cl-(aq) → AgCl(s) + Na+(aq) + NO3-(aq)

The (aq) written in the above equation signifies they are in aqueous solution.

4 0
2 years ago
What has an atomic number of 1
LiRa [457]

Answer:

Hydrogen

Explanation:

3 0
2 years ago
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vovikov84 [41]

Potassium is a chemical element

Symbol: K

Atomic number: 19

Atomic mass: 39.0983 u ± 0.0001 u

Electron configuration: [Ar] 4s1

Melting point: 146.3°F (63.5°C)

3 0
3 years ago
What do angiosperms reproduce with?
SCORPION-xisa [38]

Answer:

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5 0
2 years ago
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