Reacting mass=11.0
molar mass =53.45
moles=reacting Mass /molar mass
11.0/53.45=0.21moles
Answer:
sodium
Explanation:
nitrogem, phosphorous and potassium are very important to plant growth, but sodium isnt necessary.
Answer:
Zero with the subscripts, +2 without them.
Explanation:
Hello!
In this case, since we consider that two silicon are bonded with four oxygen atoms to form silicon oxide according to the following chemical equation:

It is also possible to realize it can be simplified to obtain:

Which means that the total charge with the subscripts is zero, and without the subscripts +2 (+4-2).
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I think they test ideas about chemical evolution by doing experiments. Hope this helps
1 atm is equal to 101.3 kpa.
therefore, to find the atm for 45.6kpa, divide 45.6 by 101.3 (and then multiply by 1 but that doesnt matter in this case).
giving 0.45 atm