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dolphi86 [110]
3 years ago
11

What do you think a chemical change is?

Chemistry
1 answer:
Rudiy273 years ago
6 0

Answer:

a chemical change is when the substance turns into a new substance and can not be changed back into its original form

Explanation:

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Answer:

0 is your correct answer mark me brainly

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2 years ago
molecules with a plane of symmetry between the chiral centers are achiral and meso. identify which of the following molecules ar
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Molecules with a plane of symmetry between the chiral centers are achiral and meso. From the given molecules (Picture attached) only (A) compound 1 is meso.

When compounds possess a plane of symmetry between the chiral centers they are called achiral or meso compounds. Among the given compounds (A) compound 1 have a plane of symmetry. So we can say compound one is a meso or achiral compound. Compounds two, three, and four have no plane of symmetry, as you can see in the structures attached. So all other compounds (compound 2, compound 3, and compound 4) except compound one are not meso or achiral.

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1 year ago
When the disk of the moon masks the disk of the sun, it creates a _________ eclipse.
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When the disk of the moon mask the the disk of the sun,it creates a (solar) eclipse.
4 0
3 years ago
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A 0.69-g sample of lime (CaO) is dissolved in enough water to make 1535 mL of solution. Calculate the pH of of the solution.
Marizza181 [45]

Answer:

pH = 12.2

Explanation:

Given data:

Mass of lime = 0.69 g

Volume = 1535 mL (1535 / 1000 = 1.535 L)

pH of solution = ?

Solution:

First of all we will determine the molarity.

Molarity = moles of solute / volume in litter

Number of moles = mass / molar mass

Number of moles = 0.69 g / 56.1 g/mol

Number of moles = 0.0123 mol

Molarity = moles of solute / volume in litter

Molarity = 0.0123 mol / 1.535 L

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0.008 M×2 = 0.016 M

[OH⁻] = 0.016 M

pOH = -log [OH⁻]

pOH = [0.016]

pOH = 1.8

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pH = 14 - pOH

pH = 14-1.8

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