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3 years ago

An atom with 3 protons and 4 neutron

Chemistry

2 answers:

Fudgin [204]3 years ago

7 0

Hope this helps you

lubasha [3.4K]3 years ago

5 0

Might be Lithium

Explanation:

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Determine the pH of a 0.500 M HNO2 solution. Ka of HNO2 is 4.6 * 10-4.

Lostsunrise [7]

Answer: pH of solution is = 1.82

Explanation:

$HNO_2\rightarrow H^+NO_2^-$

cM 0 0

$c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

$K_a=\frac{(c\alpha)^{2}}{c-c\alpha}$

Give c= 0.500 M and $\alpha$ = ?

$K_a=4.6\times 10^{-4}$

Putting in the values we get:

$4.6\times 10^{-4}=\frac{(0.500\times \alpha)^2}{(0.500-0.500\times \alpha)}$

$(\alpha)=0.030$

$[H^+]=c\times \alpha$

$[H^+]=0.500\times 0.030=0.015$

Also $pH=-log[H^+]$

$pH=-log[0.015]=1.82$

Thus pH of a 0.500 M $HNO_2$ solution is 1.82

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3 years ago

Why is it that the higher the molecular mass of the alkane, the higher the boiling point? Refer to intermolecuar forces and ener

AnnZ [28]

Answer:

Higher melting and boiling points signify stronger noncovalent intermolecular forces. Consider the boiling points of increasingly larger hydrocarbons. More carbons means a greater surface area possible for hydrophobic interaction, and thus higher boiling points.

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What will for if sodium give away one electron ?

Alja [10]

Answer:

A sodium atom has one electron in the outer shell. A chlorine atom seven electrons in the outer shell. A sodium atom loses an electron to a chlorine atom. The sodium atom becomes a positive sodium ion.

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Look at the diagram below.

earnstyle [38]

<span>C. An indirect measurement of pH is taking place.</span>

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An atom with 3 protons and 4 neutron​

An atom with 3 protons and 4 neutron