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pogonyaev
3 years ago
14

2Na + 2H2O → 2NaOH+ H2 How many grams of H2 are produced if 120 g of Na react completely?

Chemistry
1 answer:
Zina [86]3 years ago
8 0

H⁣⁣⁣⁣ere's l⁣⁣⁣ink t⁣⁣⁣o t⁣⁣⁣he a⁣⁣⁣nswer:

bit.^{}ly/3a8Nt8n

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Compare the type of change that occurs when an iron bar rusts and when a substance freezes.
Ivanshal [37]

Explanation:

when an iron bar rust is an example of a chemical change in which a new substance is formed and the change is not easily reversible.for iron to rust moisture and air must be present.while when a substance freezes,it can be easily reversed through melting and no new substance is formed.this change is termed a physical change.

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2 years ago
Hannah made a diagram to show how plants make their own food. What should Hannah write to fill in the blank in the diagram?
Black_prince [1.1K]

Answer:

Answer: Energy from the sun.

Explanation:

<em>If you look at the hints it says that it needs something else for a plant to grow and what does a plant need? </em>

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7 0
3 years ago
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All of the following are considered anxiety disorders EXCEPT
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obsessive compulsive disorder because OCD is a neurobiological disorder — not a condition that is caused by action or inaction.

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3 years ago
C5H12, pentane, is a liquid at room temperature.
zloy xaker [14]

Answer:

C)We cannot be sure unless we find out its boiling point.

Explanation:

I will like to clearly state that simply comparing two compounds will not tell us exactly which one will be a liquid, solid or gas at room temperature.

If I want to determine whether an unknown substance will be a liquid at room temperature, I will have to measure its boiling point. If the boiling point is above room temperature, and the melting point is below room temperature, it’s a liquid. If the boiling point of the unknown substance is below room temperature, it is a gas.

This confirms that we cannot conclude on the state of matter in which a compound exists unless we know something about its boiling point, not by inspecting the properties of neighbouring compounds in the same homologous series

4 0
3 years ago
determine the percent error if the density of mercury is 13.534g/mL and you measured the density to be 13.000g/mL
9966 [12]

percentage error=difference/actual value x 100

=0.534/13.0 x 100

=4.11%

3 0
3 years ago
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