Can someone please help me??? Please!!!???

1 answer:

7 0

Color (intensive) with a color pallet or a colorimeter or spectrophotometerdensity (intensive) with a balance and a water-filled cylindervolume (extensive) with a cylindermass (extensive) with a balance

boiling point (intensive): the temperature at which a substance boils (with a thermometermelting point (intensive): the temperature at which a substance melts

temperature, pressure, and density. A few other examples are heat capacity, thermal conductivity, and electrical conductivity.

conductometer,

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What is the symbol of potassium chlorite

tino4ka555 [31]

Chlorite is ClO2^-1, and potassium is K with a charge of +1. So, we would write is as KClO2, since the charges cancel out with each other.

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3 years ago

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Which of the following represents the electron configuration of rhodium

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You are instructed to create 900. mL of a 0.29 M phosphate buffer with a pH of 7.8. You have phosphoric acid and the sodium salt

Aleksandr [31]

Answer:

B and C

Explanation:

When we have to do a buffer solution we always have to choose the reaction that has the pKa closer to the desired pH value. When we find the pKa values we will obtain:

$pKa_1=-Log[6.9x10^-^3]=2.16$

$pKa_2=-Log[6.2x10^-^8]=7.20$

$pKa_3=-Log[4.8x10^-^13]=12.31$

The closer value is pKa2 with a value of 7.2. Therefore we have to use the second reaction. In which $H_2PO_4^-^1$ is the acid and $HPO_4^-^2$ is the base. Therefore the answer for the first question is B and the answer for the second question is C.