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andrezito [222]
3 years ago
8

What is changed when matter undergoes a physical change?

Chemistry
1 answer:
Furkat [3]3 years ago
3 0
I think its the mass that changes but im not sure
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Pavlova-9 [17]

Answer: (2) decreasing the concentration of HCl(aq) to 0.1 M

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2. Reactant concentration: The rate of the reaction is directly proportional to the concentration of reactants.

3. Temperature: Increasing the temperature increases the energy of the molecules and thus more molecules can react to give products and rate increases.

(1) Increasing the initial temperature to 25°C will increase the reaction rate.

(2) Decreasing the concentration of HCl(aq) to 0.1 M will decrease the reaction rate due to lesser concentration.

(3) Using 1.2 g of powdered Mg will increase the reaction rate due to large surface area.

(4) Using 2.4 g of Mg ribbon will increase the reaction rate due to high concentration of reactants.

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