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svlad2 [7]
3 years ago
8

The horizontal rows on the periodic table are called periods, how many periods are there on the periodic table?

Chemistry
2 answers:
Korolek [52]3 years ago
6 0

Answer:

7! :D

Explanation:

Also can you mark me brainliest since I was the first person to answer :p

posledela3 years ago
4 0

Answer:

Seven

There are seven periods in the periodic table

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Explanation:

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How many grams of KCN are in 10.0 ml of a 0.10 M solution?
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Explanation:

As it is known that molarity is the number of moles present in a liter of solution.

Mathematically,       Molarity = \frac{no. of moles}{Volume in liter}

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Hence, putting these values into the above formula as follows.

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                        no. of moles = 0.001 mol

As molar mass of KCN is equal to 65.12 g/mol. Therefore, calculate the mass of KCN as follows.

                 No. of moles = \frac{mass}{molar mass}

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