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3 years ago

Complete the kw expression for the autoionization of water.

1 answer:

3 0

<span>Kw = water autoionization constant=1.0 x 10-14 @ 25 Â°C Kw = [H3O+] [OHÂŻ] 1.0 x 10-14= [x][x] x=1.00 x 10ÂŻ7 M</span>

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Question 2 Multiple Choice Worth 2 points)

KatRina [158]

Answer:

Reproducible by other scientists

The personal opinion of the scientist

Using vanable conditions for each test

Explanation:

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3 years ago

Which trait is found in early embryos of both birds and humans, but then disappears from each during development?

guapka [62]

Answer:

Gills

Explanation:

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3 years ago

Nitrogen gas at 300 k and 200 kpa is throttled adiabatically to a pressure of 100 kpa if the change in kinetic energy is negligb

erastovalidia [21]

Answer:

The temperature of the Nitrogen after throttling is $T_2 = 300 \ K$

Explanation:

From the question we are told that

The temperature is $T_1 = 300 \ K$

The pressure is $P = 200 \ kPa = 200 * 10^{3} \ Pa$

The pressure after being $P_1 = 100 \ kPa = 100 * 10^{3} \ Pa$

Generally from the first law of thermodynamics we have that

$Q - W = \Delta U + \Delta K$

Here $\Delta U$ is the change internal energy which is mathematically represented as

$\Delta U = C_p (T_2 - T_1)$

Here $C_p$ is the specific heat of the gas at constant pressure

$\Delta K$ is the change kinetic energy which is negligible

Q is the thermal energy which is Zero for an adiabatic process

W is the work done and the value is zero given that the gas was throttled adiabatically

$0= \Delta U +0$

=> $\Delta U = 0$

=> $(T_2 - 300) = 0$

=> $T_2 = 300 \ K$

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3 years ago

What is the pH of 1.0M HI solution?

ozzi

Answer:

Explanation:

Since HI is a strong acid, the amoung of Hydrogen ions produced by it will be the same molar as the reactant. The negative log of the concentration will reveal that the pH is 0.

7 0

3 years ago

Read 2 more answers

If 70 mL of a 0.4 M Ba(NO3)2 solution is mixed with excess amount of a Na2CO3 solution, what is the theoretical yield of the pre

Sindrei [870]

The theoretical yield of BaCO3 is 5.5

<h3>What is theoretical yield?</h3>

The theoretical yield is the yield calculated from the stoichiometry of the reaction. The equation of the reaction is;

Ba(NO3)2(aq) + Na2CO3 (aq) ------> BaCO3(s) + 2NaNO3(aq)

Number of moles of limiting reactant: 0.4 M × 70/1000 = 0.028 moles

Since the reaction is 1:1,om;y 1 mole of BaCO3 is formed. Hence, mass of BaCO3 = 0.028 moles × 197 g/mol = 5.5g

Learn more about theoretical yield: brainly.com/question/2506978

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2 years ago