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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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If 3.0 moles of x and 4.0 moles of y react according to the hypothetical reaction below, how many moles of the excess reactant w
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Firstly the limiting reactant should be identified. Limiting reactant is the reactant that is in limited supply, the amount of product formed depends on the moles present of the limiting reactant.

the stoichiometry of x to y = 1:2
1 mole of x reacts with 2 moles of y
if x is the limiting reactant, there are 3 moles of x, then 6 moles of y should react, however there are only 4 moles of y. Therefore y is the limiting reactant and x is in excess.
4 moles of y reacts with 2 moles of x 
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Jim and Jan were racing in a 400 meter event. Jim ran the race in 44.32 seconds. Jan ran the race in 42.21 seconds. Calculate th
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\Delta S_{system}+\Delta S_{surrounding}=0

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