Answer:
Coefficient: number balancing sulfuric acid in a chemical reaction.
Subscripts: number of atoms of each element forming the compound.
Explanation:
Hello!
In this case, since sulfuric acid is a molecule containing hydrogen, sulfur and oxygen in the following way:
- Two hydrogen atoms.
- One sulfur atom.
- Four oxygen atoms.
We can notice the 2 at H represents those two hydrogen atoms, the subscriptless S represent that 1 sulfur atom and the 4 at O represents those four oxygen atoms.
Moreover, since the molecules is given as 7 H2SO4
; from stoichiometry, we infer that every number preceding the molecule stands for a coefficient which is used to balance a undergoing chemical reaction reaction.
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Answer:
The nervous system helps all the parts of the body to communicate with each other. It also reacts to changes both outside and inside the body. The nervous system uses both electrical and chemical means to send and receive messages
Explanation:
Answer:
proton: positive
electron: negative
neutron: neutral
Looks like you already have it.
C i think is the ansower hope it helped
<span>1.58x10^-1 moles
To get the number of moles, we simply need to divide by Avogadro's number, which is 6.0221409x10^23. So
9.50x10^22 / 6.0221409x10^23 = ?
Since we're dealing with scientific notation, we will deal with the significand and exponents separately.
To divide, simply divide the significands as you would normally.
9.50 / 6.0221409 = 1.577512077
And subtract the exponent for the divisor from the exponent from the dividend:
22 - 23 = -1
And we now have
1.577512077 x 10^-1 moles.
But that answer has far too many digits given the precision of the data and should only be as precise as the least precise piece of data used. In this problem, we had 8 digits of precision for Avogadro's number and 3 digits of precision for the number of atoms. Of those 2 pieces of data, 3 is the lowest precision and therefore the answer should be rounded to 3 digits, giving 1.58x10^-1 moles.</span>
