The Ideal Gas Law is as follows: PV = nRT.

Place these ions in order of preferential discharge, 1-4,where 1 is the most and 4 is least perfered.

egoroff_w [7]

Answer:

Silver ions 1 Hydrogen ions 2 Iron ions 3 Sodium ions 4

Explanation:

6 0

3 years ago

The table shows data for two groups of plants one grown with fertilizer and the other without fetalizer was the mean height of t

Dmitrij [34]

Answer:

D is the correct answer.

Explanation:

I took the test on A pex. Everyone make sure you look at your answers. They are NOT always in the same order.

8 0

2 years ago

You need to prepare an acetate buffer of pH 5.36 from a 0.900 M acetic acid solution and a 2.62 M KOH solution. If you have 680

Alexus [3.1K]

Answer:

Explanation:

pH = pKa + log [ CH₃COO⁻ ] / [CH₃COOH ]

5.36 = 4.86 + log [ CH₃COO⁻ ] / [CH₃COOH ]

log [ CH₃COO⁻ ] / [CH₃COOH ] = .5

[ CH₃COO⁻ ] / [CH₃COOH ] = 3.16

moles of CH₃COOH = .680 x .9 = .612 M

Let x mole of KOH is required

x /( .612 - x ) = 3.16

x = 1.933 - 3.16 x

x = .46488

.46488 moles of KOH will be required

volume required be V

v x 2.62 = .46488

v = .1774 L

= 177.4 mL

177.4 mL of 2.62 M KOH will be required .

6 0

3 years ago

Aspirin (C9H8O4) is synthesized by reacting salicylic acid (C7H6O3) with acetic anhydride (C4H6O3) according to the reaction: C7

Lunna [17]

Answer:

$7.39\times 10^{3}g$ of acetic anhydride is needed

Explanation:

According to balanced equation, 1 mol of salicylic acid completely reacts with 1 mol of acetic anhydride

Number of moles = (mass)/(molar mass)

Molar mass of acetic anhydride = 102.09 g/mol

Molar mass of salicylic acid = 138.121 g/mol

So, $1.00\times 10^{4}g$ of salicylic acid = $\frac{1.00\times 10^{4}}{138.121}moles$ of salicylic acid

Hence, $\frac{1.00\times 10^{4}}{138.121}moles$ of salicylic acid reacts completely with $\frac{1.00\times 10^{4}}{138.121}moles$ of acetic anhydride.

So, mass of acetic anhydride needed = $\frac{1.00\times 10^{4}}{138.121}\times 102.09g$ = $7.39\times 10^{3}g$

7 0

3 years ago

Within a single molecule of water, two hydrogen bonds are bonded to a single oxygen atom by_______.However when there are multip

Gnesinka [82]

Answer:

covalent bonding, hydrogen bonding

Explanation:

<u>The molecular formula of water is $H_2O$ in which the two hydrogen atoms are connected to the oxygen atom via covalent bonds which means that the electrons are shared in the bond.</u>

Hydrogen bonding is a special type of the dipole-dipole interaction and it occurs between hydrogen atom that is bonded to highly electronegative atom which is either fluorine, oxygen or nitrogen atom.

Partially positive end of the hydrogen atom is attracted to partially negative end of these atoms which is present in another molecule. It is strong force of attraction between the molecules.

<u>Thus, when multiple water molecules are there, there are connected by hydrogen bonding.</u>

8 0

3 years ago

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