What are the missing coefficients for the skeleton equation below in order to balance it?

Calculate the pH of lemon juice to three significant figures, with a hydrogen ion concentration of

Airida [17]

Answer:

pH = - log [2.12 x 10^-3]

what is the log of 2.22 x 10^-3]

Take the opposite of that,

That is the pH, now, just make certain you use the correct significant figures.

Explanation:

3 0

3 years ago

How many grams of potassium benzoate trihydrate, KC H302 - 3H20. are needed to prepare 1.5 L of a 0.120M solution of potassium b

Annette [7]

<u>Answer:</u> The mass of potassium benzoate is $8.40\times 10^{-4}g$

<u>Explanation:</u>

To calculate the mass of solute, we use the equation used to calculate the molarity of solution:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}}{\text{Molar mass of solute}\times \text{Volume of solution (in L)}}$

We are given:

Molarity of solution = 0.120 M

Molar mass of potassium benzoate trihydrate = 214.26 g/mol

Volume of solution = 1.5 L

Putting values in above equation, we get:

$0.120M=\frac{\text{Mass of potassium benzoate trihydrate}}{214.26\times 1.5}\\\\\text{Mass of potassium benzoate trihydrate}=\frac{0.120mol/L\times 1.5L}{214.26g/mol}=8.40\times 10^{-4}g$

Hence, the mass of potassium benzoate is $8.40\times 10^{-4}g$

8 0

3 years ago

The concentration of the particles in the solid phase always remains the same regardless of how much quantity is present true or

Elan Coil [88]

The answer is true solid phase remains the same

3 0

3 years ago

Read 2 more answers

At some temperature for the equilibrium PX3(g) + X2(g) # PX5(g) the equilibrium constant is 0.74. At the same temperature the eq

mariarad [96]

Answer: The equilibrium constant for $PX_5(g)\rightarrow PX_3(g)+X_2(g)$ is 1.35

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as $K_c$