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nlexa [21]
2 years ago
14

Please help

Chemistry
1 answer:
murzikaleks [220]2 years ago
3 0

Answer:

Mass.

Si Unit Measurement.

volume.

milliliters.

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Oksana_A [137]

If the glasses and glove were wrong then I would chose the fire extinguisher and the power source should be the correct answer.

That's just what I would do though.

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If there is a graduated cylinder containing 20mL of water and a small rock is gently placed inside it, and the water level insid
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5

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If the reactants have a potential energy of 10.2 kJ/mol and the products have a potential
Citrus2011 [14]

Answer:

The ΔH is 5.5 kJ/mol and the reaction is endothermic.

Explanation:

To calculate the ∆H (heat of reaction) of the combustion reaction, that is, the heat that accompanies the entire reaction, you must make the total sum of all the heats of the products and of the reagents affected by their stoichiometric coefficient ( number of molecules of each compound participating in the reaction) and finally subtract them:

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An endothermic reaction is one whose enthalpy value is positive, that is, the system absorbs heat from the environment (ΔH> 0).

<u><em>The ΔH is 5.5 kJ/mol and the reaction is endothermic.</em></u>

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When thermal energy is removed from matter, what happens to the molecules?​
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Explanation:

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What do these two changes have in common sauce burning on a stove and jewelry tarnishing
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The changes that are common between sauce burning on a stove, and jewelry tarnishing, which is a chemical change.

How to define chemical and physical changes?

Chemical Change-

Any alteration that produces new chemical substances with distinct properties is considered a chemical change. Chemical reactions involve the rearrangement and recombination of elements and compounds to create new substances. Examples of chemical changes are listed below:

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Physical Change-

A substance is not destroyed or transformed into something new by physical changes. A substance can undergo physical changes that alter its shape, size, or phase. The constituents of an element or compound do not change during a physical change. Examples of physical changes are listed below:

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To know more about chemical and physical changes, visit the given link:

brainly.com/question/20628019

#SPJ4

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