Answer:
they change the state of matter
Explanation:
Physical properties can be observed or measured without changing the composition of matter
Chemical properties are only observed during a chemical reaction and thus changing the substance's chemical composition
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The number of moles in 2.154 x 10⁻¹ kg of Al is 7.984.
<h3>What is a Mole?</h3>
- A mole is a unit used to describe the amount of substance that has exactly the same number of elementary particles as there are atoms in 12 grams of Carbon - 12.
- A mole has 6.022 x 10²³ elementary particles (atoms, ions or molecules, etc.). This fixed quantity is known as Avagadro's Number.
The molar mass of Al = 26.98 gmol⁻¹
Given the mass of Al = 2.154 x 10⁻¹ kg = 215.4 g
Number of moles given by
where m = given mass of the compound
M = Molar mass of the compound
The number of moles of Al = = 7.984 moles
Hence, the number of moles of Al is 7.984 moles.
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During MITOSIS!!
mitosis is a fundamental process for life. during mitosis; a cell duplicated all of its contents, including its chromosomes, and splits to form two daughter cells. because this process is so critical, the steps of mitosis are carefully controlled by a number of genes.
1. A 2. D 3. C 4. B are the answers