Your calculated density of aluminum is d = 2.69 g/cm3. aluminum’s accepted density is 2.70 g/cm3. without writing the "%" sign, calculate the percent error up to two decimal places: your calculated density of aluminum is d = 2.69 g/cm3. aluminum’s accepted density is 2.70 g/cm3. without writing the "%" sign, calculate the percent error up to two decimal places:

0.37 %

Explanation:

Given that:

Calculated density of aluminum = 2.69 g/cm³

Accepted density of aluminum = 2.70 g/cm³

Thus, applying values as:

Percent error = 0.37 %

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

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