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3 years ago

11

How does a difference in 1 pH unit change in terms of H+ concentration? Ex: How does a pH of 3 differ from the pH of 4? Which on

e is stronger or weaker? Why?

1 answer:

wariber [46]3 years ago

4 0

Answer:

PH is a logarithmic scale it means that 1 increase or decrease in PH changes concentration tenfold

PH 3 is 10 times more acidic than PH 4

Explanation:

You might be interested in

What is the mass in grams of 250 ml of PH3 at STP?

SIZIF [17.4K]

We can find the number of moles of PH₃ using ideal gas law equation
PV = nRTwhere
P - standard pressure - 101 325 Pa
V - volume - 250 x 10⁻⁶ m³
n - number of moles
R - universal gas constant - 8.314 Jmol⁻¹K⁻¹
T - temperature - 273 K
substituting the values in the equation
101 325 Pa x 250 x 10⁻⁶ m³ = n x 8.314 Jmol⁻¹K⁻¹ x 273 K
n = 0.011 mol
therefore mass of PH₃ = 0.011 mol x 34 g/mol = 0.374 g
mass of PH₃ is 0.374 g

8 0

4 years ago

Unlike gases, the behavior of liquids and solids cannot be described by a set of laws that can be applied regardless of the iden

Tresset [83]

Answer:

a. True

Explanation:

The gases that we study are governed by different laws of physics. Gases behaves according to some given set of laws like the Universal gas laws, Boyles law, Charles law, Gay Lussac's law and many more.

But we do not see a definite pattern or rule when we study solids or liquids. The behavior of the solids and liquids are not described by the set of laws which are applied regardless of the identity of the substance.

6 0

3 years ago

Calculate the energy of light having a wavelength of 395 nm. <br> show work

Liono4ka [1.6K]

Answer: $5.032\times 10^{-19}\ J$

Explanation:

Given

The wavelength of the light is $\lambda =395\ nm$

Energy associated with a photon(light) is given by $E=\frac{hc}{\lambda}$

where, $h=\text{Planck constant}$

$c=\text{speed of light}$

$\Rightarrow E=\dfrac{6.626\times 10^{-34}\times 3\times 10^8}{395\times 10^{-9}}\\\\\Rightarrow E=5.032\times 10^{-19}\ J$

Therefore, the energy associated with the light is $5.032\times 10^{-19}\ J$

6 0

3 years ago

A certain compound has the percent composition (by mass) 85.63% C and 14.37% H. The molar mass of the compound is 42.0 g/mol. Ca

AlekseyPX

Answer:

The molecular formula is C3H6

Explanation:

Step 1: Data given

Suppose the compound has a mass of 100 grams

The compound contains:

85.63 % C = 85.63 grams C

14.37 % H = 14.37 grams H

Molar mass C = 12.01 g/mol

Molar mass H = 1.01 g/mol

Step 2: Calculate moles

Moles = grams / molar mass

Moles C = 85.63 grams / 12.01 g/mol

Moles C = 7.130 moles

Moles H = 14.37 grams / 1.01 g/mol

Moles H = 14.2 moles

Step 3: Calculate the mol ratio

We divide by the smallest amount of moles

C: 7.130 moles / 7.130 moles = 1

H = 14.2 moles / 7.130 moles = 2

The empirical formula is CH2

The molar mass of CH2 = 14 g/mol

Step 4: Calculate molecular formula

We have to multiply the empirical formula by n

n = 42 / 14 = 3

n*(CH2) = C3H6

The molecular formula is C3H6

8 0

3 years ago

Which equilibrium reaction will experience a shift towards the products in equilibrium position when the concentration of ni2+ i

juin [17]

Answer is <span>
Ni²</span>⁺(aq) + 6NH₃(aq) ⇌ [Ni(NH₃)₆]²⁺<span>

</span>

<span>When the concentration of Ni²⁺</span><span>(aq) increases, according to the Le Chatelier’s principle system tries to become equilibrium by reducing the increased factor. To do that, the concentration of Ni²⁺</span><span>(aq) should be reduced. Hence, the forward reacted should be promoted to reduce the Ni²⁺</span><span>(aq) concentration</span>.

8 0

3 years ago