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Basile [38]
3 years ago
15

Which of the following statements does not describe the structure of an atom?

Chemistry
2 answers:
Hitman42 [59]3 years ago
7 0
Most of the mass of an atom comes from the electron cloud would NOT describe the structure of an atom
Rudik [331]3 years ago
7 0
I would say d so i hope this is correct
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Determine the resulting pH when 12mL if 0.16M HCl are reacted with 32 mL if 0.24M KOH.
TEA [102]

Answer:

pH = 13.1

Explanation:

Hello there!

In this case, according to the given information, we can set up the following equation:

HCl+KOH\rightarrow KCl+H_2O

Thus, since there is 1:1 mole ratio of HCl to KOH, we can find the reacting moles as follows:

n_{HCl}=0.012L*0.16mol/L=0.00192mol\\\\n_{KOH}=0.032L*0.24mol/L=0.00768mol

Thus, since there are less moles of HCl, we calculate the remaining moles of KOH as follows:

n_{KOH}=0.00768mol-0.00192mol=0.00576mol

And the resulting concentration of KOH and OH ions as this is a strong base:

[KOH]=[OH^-]=\frac{0.00576mol}{0.012L+0.032L}=0.131M

And the resulting pH is:

pH=14+log(0.131)\\\\pH=13.1

Regards!

3 0
2 years ago
Match the examples with the correct term.
Marizza181 [45]
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2 years ago
0.22 L of HNO3 is titrated to equivalence using 0.18 L of 0.2 MNaOH. What is the concentration of the HNO3?
andre [41]

Answer:

0.16 M

Explanation:

Data provided as per the question is below:-

Volume of HNO_3 = 0.22 L

The Volume of NaOH = 0.18 L

Morality of NaOH = 0.2

According to the given situation, the calculation of the concentration of the HNO_3 is shown below:-

For equivalence,

Number of the equivalent of HNO_3 = Number of equivalents of NaOH

= \frac{0.18\times0.2}{0.22}

= \frac{0.036}{0.22}

= 0.16363 M

or

= 0.16 M

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