How many hydrogen atoms Is needed for C2H2 to become saturated

When KNO3 dissolved in water, what is the intermolecular attraction between NO3 ions

Snezhnost [94]

Ion-dipole forces

H2O has hydrogen bonding, which is a form of dipole-dipole forces, and NO3- is an ion, so the intermolecular attraction is ion-dipole.

4 0

3 years ago

Enter your answer in the provided box. Sodium stearate (C17H35COONa) is a major component of bar soap. The Ka of the stearic aci

kogti [31]

Answer:

11.61 is the pH of 10.0 mL of a solution containing 3.96 g of sodium stearate.

Explanation:

Concentration of sodium stearate acid : c

Moles of sodium stearate = $\frac{3.96 g}{306 g/mol}=0.01294 mol$

Volume of the solution = 10.0 mL = 0.010 L

$c=\frac{0.01294 mol}{0.010 L}=1.294 M$

$C_{17}H_{35}COONa\rightleftharpoons C_{17}H_{35}COO^-+Na^+$

$[C_{17}H_{35}COO^-]=c=1.294 M$

$C_{17}H_{35}COO^-+H_2O\rightleftharpoons C_{17}H_{35}COOH +OH^-$

initially c

c 0 0

At equilibrium

(c-x) x x

Dissociation constant of an acid = $K_a=1.3\times 10^{-5}$

Expression of a dissociation constant of an acid is given by:

$K_a=\frac{[C_{17}H_{35}COOH][OH^-]}{[C_{17}H_{35}COO^-]}$

$K_a=\frac{(x)^2\times x}{(c -x)}$

$1.3\times 10^{-5}=\frac{x^2}{1.294-x}$

Solving for x;

x = 0.0041 M

$[OH^-]=0.0041 M$

The pOH of the solution:

$pOH=-\log[OH^-]=-\log[0.0041 M]=2.39$

pH = 14 -pOH

pH = 14 - 2.39 = 11.61

11.61 is the pH of 10.0 mL of a solution containing 3.96 g of sodium stearate.

7 0

4 years ago

Stephen is baking cakes. He needs 1/4 cup of butter for each cake. One stick of butter is 1/2 a cup. How many sticks of butter d

ludmilkaskok [199]

The answer is A. 3 sticks of butter

4 0

3 years ago

What is formed when the number of electrons is changed?

aleksley [76]

Answer:

Explanation:

Whether the electrons are added or given away makes no difference to the name given to parent atom -- It is called an ion which means that it has a charge. The word atom is reserved for something on the periodic table that has no charge.

7 0

3 years ago

What is the number of electrons shared between the atoms in I2 molecule (That is an i not a 1)

labwork [276]

Iodine is one of seven elements that usually form as diatomic molecules. These other "diatomics" are $O_2, H_2, F_2, Br_2, N_2,$ and $Cl_2$ . They typically bond to themselves.

Iodine has seven valence electrons. Using valence shell electron pair repulsion (VSEPR) theory, we can predict the Lewis dot structure for $I_2$ . We see there are fourteen electrons, and we can make a covalent bond, leaving three lone pairs on each atom. The bond replaces two electrons, so the number of electrons shared is two.

4 0

3 years ago