Hydrogen and helium in the universe were formed by which of these phenomena?

Which period does this atom belong to?

GrogVix [38]

I think it’s to long to fit in a period??

7 0

2 years ago

Submit What is the solubility of Cd3(POA) 2 in water? (Ksp of Cd3(PO4)2 is 2.5 x 10-33) | 1 2 3 +/- . 0 x100

vesna_86 [32]

Answer: The solubility of $Cd_3(PO_4)_2$ in water is $1.18\times 10^{-7}mol/L$

Explanation:

The balanced equilibrium reaction for the ionization of cadmium phosphate follows:

$Cd_3(PO_4)_2\rightleftharpoons 3Cd^{2+}+2PO_4^{3-}$

3s 2s

The expression for solubility constant for this reaction will be:

$K_{sp}=[Cd^{2+}]^3[PO_4^{3-}]^2$

We are given:

$K_{sp}=2.5\times 10^{-33}$

Putting values in above equation, we get:

$2.5\times 10^{-33}=(3s)^3\times (2s)^2\\\\2.5\times 10^{-33}=108s^5\\\\s=1.18\times 10^{-7}mol/L$

Hence, the solubility of $Cd_3(PO_4)_2$ in water is $1.18\times 10^{-7}mol/L$

6 0

3 years ago

Which property is characteristic of ionic but not of covalent compounds? 1. low boiling point 2. non-conductor of electricity in

otez555 [7]

Ionic and covalent bonds are both strong intermolecular forces. They are generally both crystalline in structure. But relatively speaking, ionic bonds are much stronger. As a consequence, they have inherent properties of higher boiling points, higher melting points, lower volatility, etc. Also, ionic bonds display conductive properties because they are strong electrolytes. Thus, the answer is 5) higher melting points.

5 0

2 years ago

A pool is 59.8 m long and 26.6 m wide. If the average depth of water is 3.70 ft, what is the mass (in kg) of water in the pool?

klio [65]

Given :

Length , l = 59.8 m.

Breadth , b = 26.6 m.

Depth , d = 3.7 ft .

Density of water , $\rho=1\ g/ml=1000\ kg/m^3$ .

To Find :

Mass of water in pool .

Solution :

First we will covert depth into m from ft .

$1\ ft =0.3\ m$

For ,

$3.7\ ft=0.3\times 3.7\ m\\3.7\ ft=1.11\ m$

So , volume of pool is :

$V=59.8\times 26.6\times 1.11\ m^3\\\\V=1765.65\ m^3$

We know , density is given by :

$\rho=\dfrac{m}{V}$

So , $m=\rho V$

Putting given values in above equation :

$m=1000\times 1765.65\ kg\\\\m=1.77\times 10^6\ kg$

Hence , this is the required solution.

7 0

3 years ago

Which of the following best helps to explain why the electron affinity of Br has a greater magnitude than that of I?

tankabanditka [31]

The reason why Br has a greater magnitude of electron affinity than that of I is that there is a greater attraction between an added electron and the nucleus in Br than in I.

In the periodic table, there are trends that increase down the group and across the period. Electron affinity is a trend that increases across the period but decreases down the group.

Recall that the ability of an atom to accept an electron depends on the size of the atom. The smaller the atom, the greater the attraction between an added electron and the nucleus.

Since Br is smaller than I, there is a greater attraction between an added electron and the nucleus in Br than in I which explains why Br has a greater magnitude of electron affinity than I.

Learn more: brainly.com/question/17696329

7 0

2 years ago