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marusya05 [52]
3 years ago
14

the element Potassium is found in the fourth. Of the periodic table what does that tell you about an atom of potassium​

Chemistry
1 answer:
alexira [117]3 years ago
6 0
It tells you how many atoms it has, how many protons it contains and the number of electrons.

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Answer:

B

Explanation:

Molarity = 0.010M

Volume = 2.5L

Applying mole-concept,

0.010mole = 1L

X mole = 2.5L

X = (0.010 × 2.5) / 1

X = 0.025moles

0.025moles is present in 2.5L of NaOH solution.

Molar mass of NaOH = (23 + 16 + 1) = 40g/mol

Number of moles = mass / molar mass

Mass = number of moles × molar mass

Mass = 0.025 × 40

Mass = 1g

1g is present in 2.5L of NaOH solution

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