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lesantik [10]
3 years ago
9

How many mole are in 2.84*10^22 molecules of h2

Chemistry
1 answer:
Step2247 [10]3 years ago
4 0

Avogadro's Number and the Mole. The mole is represented by Avogadro's number, which is 6.022×1023 atoms or molecules per mol.

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02 (s) + Pb(s) — PbO2(s) find the reduced and oxidized reactants
Arlecino [84]

Answer:

Oxygen is oxidizing gent and itself get reduced while lead is reducing agent and itself get oxidize.

Explanation:

Chemical  equation with oxidation state:

O⁰₂(s)  +  Pb⁰ (s)    →  Pb⁺⁴O₂⁻²(s)

Oxidizing agent:

Oxidizing agents, oxidize the other substance and itself get reduced. They can be identify by just looking the oxidation state. If oxidation state is decreased on the right side it means substance gain the electron and get reduced.

Reducing agent:

Reducing agents, reduce the other substance and itself get oxidize. They can be identify by just looking the oxidation state. If oxidation state is increased on the right side it means substance lose the electron and oxidation state increased.

In given chemical equation, oxygen and lead were in neutral form they react and form lead dioxide. In this product oxygen is oxidizing gent and itself get reduced and oxidation state change from 0 to -2 while lead is reducing agent, itself get oxidize and oxidation state change from o to +4.

7 0
3 years ago
2. How much energy must be removed from a 50.0 g sample of steam in order to get it to condense
Strike441 [17]

Answer:

113 kJ or 113,000J

Explanation:

Since we are condensing it, a physical change in the state of matter is occurring. 113 kJ or 113,000J because of the following equation: Q = 2260 times 50.  2260 is the Heat of Vaporization constant.

5 0
3 years ago
The process that occurs when physical forces break rock into smaller pieces without changing the rock's chemical composition is
sp2606 [1]

Answer:

A) Mechanical Weathering

Pls Mark As Brainliest!!!!!!!!!!!!!

Explanation:

Mechanical weathering breaks rocks into smaller pieces without changing their composition. Ice wedging and abrasion are two important processes of mechanical weathering. Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface

4 0
3 years ago
Which is the atomic number of an atom that forms an ion with 18 electrons and a charge of 2+?
Anettt [7]

Answer:

Calcium

Explanation:

It has 20 electrons to start, loses two to become Ca 2+, and is left with 18 electrons

5 0
3 years ago
7. A scientist is trying to determine the identity of an element. It is highly reactive in water
Hunter-Best [27]
Group 15 is the correct answer
7 0
3 years ago
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