2 years ago

Plz help i need to check my answer

Mathematics

1 answer:

gavmur [86]2 years ago

7 0

each book would be 1.9 pounch each because 9.5 divided by 5 is 1.9. to check this do 1.9 times 5 and see if u get 9.5

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bearhunter [10]

Answer:

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Step-by-step explanation:

$(13x^{2} +9x-4)-(12x^{2} -2x+6)$

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2 years ago

A solution with a pH of 11 has a [H+] of: 11 1 x 10-3 1 x 10-11 1 x 1011 1 x 103

serious [3.7K]

A solution with a pH of 11 has a [H+] of $1.0\times 10^{-11}$

Option B is correct option.

Step-by-step explanation:

A solution with a pH of 11 has a [H+] of= ?

pH=?

Concentration of H+ [H+]= ?

Formula used: $pH=-log[H+]$

Putting values and finding [H+]

$pH=-log[H+]\\\,[H+]\,=10^{-pH}\\\,[H+]\,=10^{-11}\\\,[H+]\,=1.0\times 10^{-11}$

So, A solution with a pH of 11 has a [H+] of $1.0\times 10^{-11}$

Option B is correct option.

4 0

3 years ago