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Norma-Jean [14]
2 years ago
9

Which of the following will result in a chemical change?

Chemistry
2 answers:
brilliants [131]2 years ago
4 0

Answer:

i want to say It would be Abecause a chemical change is somthing that cant NOT be brought back to its areganal proproties.coal will never be able to be bavk the way it was!!

Explanation:

because a chemical change is somthing that cant not be brought back to its areganal proproties.coal will never be able to be back the way it was.

emmainna [20.7K]2 years ago
3 0
It’s B becouse the others only change state or don’t change the chemical composition of the material and That’s why it’s B
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"Calculate the number of millimoles in 500 mg of each of the following amino acids: alanine (MW = 89), leucine (131), tryptophan
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Answer:

- Alanine =  5.61 mmoles

- Leucine = 3.81 mmoles

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- Cysteine = 4.13 mmoles

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Explanation:

Mass / Molar mass = Moles

Milimoles = Mol . 1000

500 mg / 1000 = 0.5 g

- Alanine = 0.5 g / 89 g/m → 5.61x10⁻³ moles  . 1000 = 5.61mmoles

- Leucine = 0.5 g / 131 g/m → 3.81 x10⁻³ moles  . 1000 = 3.81 mmoles

- Tryptophan = 0.5 g / 204 g/m →  2.45x10⁻³ moles . 1000 = 2.45 mmoles

- Cysteine = 0.5 g / 121 g/m → 4.13x10⁻³ moles . 1000 = 4.13 mmoles

- Glutamic acid = 0.5 g 147 g/m → 3.40x10⁻³ moles . 1000 =  3.4 mmoles

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