Question 4; A
Question 5; C
Question 6; C
Question 7; A
Matter cannot be created or destroyed.Further explanation
Conservation of mass applies to a closed system, where the masses before and after the reaction are the same
Conservation of mass means:
In a closed/isolated system, the total mass of the substance before the reaction will be equal to the total mass of the reaction product.
So what changes is the form, into a liquid, gas or solid
while what does not change is the mass
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I just took the test and I hope this helps.