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riadik2000 [5.3K]
2 years ago
15

Help me please!!!!!!!!!!!!

Chemistry
1 answer:
Lisa [10]2 years ago
3 0
PLEASDR PLEASE PLEASE PLEASE PLEASE PLEASE HELP PLEASE PLEASE MAKE PLEASE PLEASE HELP ME PLEASE PLEASE HELP POG PLEASE PLEASE HELP US PLEASE HELP ME HELP ME PLEASE HELP ME THANKS FOR PLE ME PLEASE
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What does the bottom number within each box of the periodic table refer to? How can it be used to determine the number of neutro
geniusboy [140]
The number above the symbol is the atomic mass (or atomic weight). This is the total number of protons and neutrons in an atom. The number below the symbol is the atomic number and this reflects the number of protons in the nucleus of each element's atom. Every element has a unique atomic number.
4 0
3 years ago
The pressure of a gas is 750 torr when its volume is 400. ml. Calculate the
ololo11 [35]

Answer:

a. 0.66 atm

Explanation:

Pi = 750 torr = 0.99 atm. Pf = ?

Vi = 400 ml Vf = 600ml

Using PiVi = PfVf

Then 400ml × 0.99atm = Pfatm × 600ml

Solving for Pf, we have,

Pf = (400ml × 0.99atm)/600ml

Pf = 0.66atm

7 0
2 years ago
Among the following compounds which are isomers?
Assoli18 [71]
Im going for d i think i took this last year
4 0
2 years ago
Is the equation for reaction 1 balanced? Explain your reasoning. If the reaction is not balanced, then state how you would balan
sveticcg [70]

Answer:

Reaction is already balanced

Explanation:

The equation in reaction 1 is given as;

CH3COOH + NaHCO3 --> CO2 + H2O +  Na+   +  CH3COO-

The reaction is already balanced. This is because the umber of atoms of elements in the reactant is equal to that of the products

Carbon

Reactant = 2 + 1 = 3

Product = 2 + 2 = 3

Hydrogen

Reactant = 3 + 1 + 1 = 5

Product = 2 + 3 = 5

Oxygen

Reactant = 2 + 3 = 5

Product = 2 +1 + 2 = 5

Sodium

Reactant = 1

Product = 1

3 0
3 years ago
Choose the correct statements from the list below:
ioda
In chemistry:
When something is oxidized, it loses electrons.
When something is reduced, it gains electrons.
So the correct statements would be the second to last and third to last statements
6 0
3 years ago
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