4 years ago

Draw a negative relationship between variables

Chemistry

1 answer:

ankoles [38]4 years ago

5 0

I hope this helped♡ I drew the realationship of variables

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It would float. Wood does not sink

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A solution has a pH of 4.20. Using the relationship between pH and pOH, what is the concentration of OH?? A. 9.9 × 10-1 M B. 6.2

vivado [14]

The correct answer is option E.

Explanation:

The pH of the solution is defined as negative logarithm of hydrogen ions concentration in a solution. Mathematically written as:

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

The pOH of the solution is defined as negative logarithm of hydroxide ions concentration in a solution. Mathematically written as:

$pOH=-\log[OH^-]$

The sum of ph and pOH is equal to 14.

pH + pOH = 14

A solution has a pH of 4.20.

$pOH=14-pH=14-4.20=9.8$

$pOH=9.8=-\log[OH^-]$

$[OH^-]=1.58\times 10^{-10} M\approx 6.0\times 10^{-10} M$

Hence, the correct answer is option E.

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3 years ago

if there is 4 protons, 2 electrons, 5 neutrons what is the iconic charge and what element is this ?

maxonik [38]

Answer:

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Explanation:

The atomic number indicates the number of protons so the element is Be (beryllium)

So now we know that a neutral atom contains four electrons but there are 2 so that means two electrons were taken away, making it positive. It would be a 2+ charge.

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