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3 years ago

What is the oxidation number of each nitrogen atom (N) in calcium nitrate (Ca(NO3)2)? (3

Chemistry

1 answer:

Dmitry_Shevchenko [17]3 years ago

6 0

Yes 5a is equal to 81 for fraction equally

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If a 1.00 mL sample of the reaction mixture for the equilibrium constant experiment required 32.40 mL of 0.258 M NaOH to titrate

andrey2020 [161]

Answer:

The concentration of acetic acid is 8.36 M

Explanation:

Step 1: Data given

Volume of acetic acid = 1.00 mL = 0.001 L

Volume of NaOH = 32.40 mL = 0.03240 L

Molarity of NaOH = 0.258 M

Step 2: The balanced equation

CH3COOH + NaOH → CH3COONa + H2O

Step 3: Calculate the concentration of the acetic acid

b*Ca*Va = a*Cb*Vb

⇒with b = the coefficient of NaOH = 1

⇒with Ca = the concentration of CH3COOH = TO BE DETERMINED

⇒with Va = the volume of CH3COOH = 1.00 mL = 0.001L

⇒with a = the coefficient of CH3COOH = 1

⇒with Cb = the concentration of NaOH = 0.258 M

⇒with Vb = the volume of NaOH = 32.40 mL = 0.03240 L

Ca * 0.001 L = 0.258 * 0.03240

Ca = 8.36 M

The concentration of acetic acid is 8.36 M

6 0

3 years ago

For the reaction: N2O5(g) \longrightarrow&longrightarrow; 2NO2(g) + 1/2O2(g)

ivanzaharov [21]

The given equation from the problem above is already balance,
N2O5 ---> 2NO2 + 0.5O2
Since, in every mole of N2O5 consumed, 2 moles of NO2 are formed, we can answer the problem by multiplying the given rate, 7.81 mol/L.s with the ratio.
(7.81 mol/L.s) x (2 moles NO2 formed/ 1 mole of N2O5 consumed)
= 15.62 mol/L.s
The answer is the rate of formation of NO2 is approximately 15.62 mol/L.s.

5 0

3 years ago

Vodka is composed of 40% ethanol and 60% water. Water is the _____. while ethanol is the __, and vodka is a _____?

Mars2501 [29]

Answer:

The answer is A. solvent, solute, solution.

Explanation:

3 0

3 years ago

If a gas displays a solubility of 0.00290M at a partial pressure of 125 kPa, what is the proportionality constant for this gas i

alexgriva [62]

Answer:

The proportionality constant ( Henry’s constant) = 2.32 * 10^-5 M/kPa

Explanation:

Here in this question, we are concerned with calculating the proportionality constant for this gas.

Mathematically, we can get this from Henry law

From Henry law;

Concentration = Henry constant * partial pressure

Thus Henry constant = concentration/partial pressure

Henry constant = 0.00290 M/125 kPa = 2.32 * 10^-5 M/kPa

5 0

3 years ago

the developing chamber is not covered with plastic wrap during the development of the chromatogram. will the Dion value for the

kogti [31]

Answer:

The correct answer is less than the actual value.

Explanation:

The Dion value of the cation would be less of the actual values because the solvent wouldn’t travel on the paper properly. The non-polar molecules in the mixture will have little attraction for the water molecules attached to the cellulose, so they will spend most of their time dissolved in the moving solvent. Molecules like this therefore travel far above the paper that carries the solvent.

Have a nice day!

8 0

3 years ago