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Andrej [43]
3 years ago
5

if an atom has a mass number of 226 and an atomic number of 88. how many protons and neutrons does it have​

Chemistry
2 answers:
ira [324]3 years ago
5 0

There is 140. Protons and neurons

aleksandrvk [35]3 years ago
3 0
There is 138. Protons and neurons
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You are given solutions of hcl and naoh and must determine their concentrations. you use 27.5 ml of naoh to titrate 100.0 ml of
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1) Start by standardizing the solution of NaOH by using the solution of H2SO4 whose concentration is known.

2) Equation:

2Na OH + H2SO4 --> Na2 SO4 + 2H2O

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2 mol NaOH : 1 mol H2SO4

4) Number of moles of H2SO4 in 50.0 ml of 0.0782 M solution

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6) Concentration of the solution of NaOH

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7) Standardize the solution of HCl

Chemical reaction:

NaOH + HCl --> NaCl + H2O

8) Molar ratios

1 mol NaOH : 1 mol HCl

9) Number of moles of NaOH in 27.5 ml

M = n / V => n = M * V = 0.425 M * 0.0275 l = 0.01169 moles NaOH

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1 mol HCl / 1mol NaOH * 0.01169 mol NaOH = 0.01169 mol HCl

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Answers:

[NaOH] = 0.425 M
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3 years ago
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he scientific method has five basic steps, plus one feedback step:

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Explanation:

I think A.

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