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3 years ago

Question # 4 & 5. help CHEMISTRY

Chemistry

1 answer:

laila [671]3 years ago

4 0

1. A thermodynamic quantity that is the difference between the internal energy of a system and the product of itsabsolute temperature and entropy; the capacity of a system to do work, as in an exothermic chemical reaction.2. A thermodynamic quantity that is the difference between the enthalpy and the product of the absolute temperatureand entropy of a system. Also called Gibbs free energy.

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The reaction 2NoBr(g) ---> 2NO(g)+Br2(g) is a second order reaction with a rate constant of 0.80M^-1 s^-1 at 11 C. If the ini

aleksley [76]

Answer:

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Explanation:

5 0

3 years ago

Find the wavelength of a photon of light with energy of 9.02x10^-19 J.

vitfil [10]

Answer:

2.21 x 10⁻⁷m⁻¹

Explanation:

Given parameters:

Energy of the photon = 9.02 x 10⁻¹⁹J

Unknown:

Wavelength of the photon = ?

Solution;

The wavelength and energy of a photon are related using the expression below;

E = $\frac{hc}{wavelength}$

h is the Planck's constant = 6.63 x 10⁻⁴m²kg/s²

c is the speed of light

E is the energy

h c = E x wavelength

Wavelength = $\frac{hc}{E}$ = $\frac{6.63 x 10^{-34} x 3 x 10^{8} }{9.02 x 10^{-19} }$

Wavelength = 2.21 x 10⁻⁷m⁻¹

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3 years ago

Can someone answer these will give brainliest

sukhopar [10]

Answer:

acid base --

Explanation:

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6 0

3 years ago

If the pH of a wine is too high, say, 4.0 or above, the wine becomes unstable and has a flat taste. (a) A certain California red

Cerrena [4.2K]

Answer:

The Californian red wine (pH 3.5) has a hydrogen concentration of 0.00032M

The italian white wine (pH 2.9) has a hydrogen concentration of 0.00126 M

Explanation:

Step 1: Data given

Wine 1 has a pH of 3.5

Wine 2 has a pH of 2.9

Wine 2 is more acid so should have more hydrogen ions

Step 2: Calculate hydrogen concentration

pH = -log [H+]

Wine 1: pH = 3.5 = -log[H+]

[H] = 10 ^-3.5 M = 0.00032 M

Wine 2: pH =2.9 = -log[H+]

[H+] = 10^-2.9 = 0.00126 M

The Californian red wine (pH 3.5) has a hydrogen concentration of 0.00032M

The italian white wine (pH 2.9) has a hydrogen concentration of 0.00126 M

The italian white wine has a higher concentration of hydrogen ions, what means it's more acid than the californian red wine.

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3 years ago

Fred mixes a solution using two types of solutions: 0.60 liters containing 10% alcohol and 0.40 liters containing 35% alcohol. W

insens350 [35]

The alcohol concentration of the mixed solution is 20%

Simplification :

Based on the given condition, formulate :

35% ×0.40 + 0.6 ×10% ÷{ 0.4+0.6}

Calculate the product : $\frac{0.14+0.06}{0.4 + 0.6}$

Calculate the sum or difference : $\frac{0.2}{1}$

Any fraction with denominator 1 is equal to numerator : 0.2

Multiply a number to both numerator, denominator : 0.2 × $\frac{100}{100}$

Calculate the product or quotient : $\frac{20}{100}$

A fraction with denominator equals to 100 to a percentage 20%.

How do you find the concentration of a mixed solution?

In general when your are mixing two different concentrations together first calculate number of moles for each solution (n=CV ,V-in liter) then add them together it will be total moles,then concentration of mixture will be = total moles / total volume(liter).

Learn more about concentration of alcohol :

brainly.com/question/13220698

#SPJ4

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2 years ago