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3 years ago

Please help me whoever answers I’ll mark the the brainiest.

Chemistry

1 answer:

nasty-shy [4]3 years ago

8 0

Answer:

loptop ba yan isearch mo nalang

Explanation:

para makuha mo ang

gusto mong makuha

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Ammonium (NH4+), carbonate (CO32−), and phosphate (PO43−) are all examples of: (a) multivalent metals (b) polyatomic ions (c) co

PtichkaEL [24]

Answer:

Option b) polyatomic ions

Explanation:

Polyatomic ions are ions consisting of two or more atoms.

From the question given above, we can see that each ions consist of more than one atom as shown below:

Ions >>>>>> Number of atom present

NH4+ >>>>> 2

CO32− >>>> 2

PO43− >>>> 2

Thus, we can say that the above ions are polyatomic ions.

5 0

3 years ago

B) Explain three ways by which water can be purified in the home

frosja888 [35]

Explanation:

Water can be purified from through...

Filtration - This involves the use of filter paper to remove solid objects found in water.

Boiling - This involves keeping water at 100 deg celcius for a while through application of heat and this kills microorganisms in the water.

Addition of alum - Alum causes very fine and small particles that are suspending in water to stick together making them large enough to be removed through filtration.

Chemicals used in water treatment...

Chlorine - Chlorine is used to kill bacteria, viruses and other disease causing pathogens found in water

That's all I know...

6 0

4 years ago

A photon with 2.3 eV of energy can eject an electron from potassium. What is the corresponding wavelength of this type of light?

Ira Lisetskai [31]

Answer:

$\lambda=540.16\ nm$

Explanation:

Given that:

The energy of the photon = 2.3 eV

Energy in eV can be converted to energy in J as:

1 eV = 1.60 × 10⁻¹⁹ J

So, Energy = $2.3\times 1.60\times 10^{-19}\ J=3.68\times 10^{-19}\ J$

Considering

$Energy=\frac {h\times c}{\lambda}$

Where,

h is Plank's constant having value $6.626\times 10^{-34}\ Js$

c is the speed of light having value $3\times 10^8\ m/s$

$\lambda$ is the wavelength of the light being bombarded

Thus,

$3.68\times 10^{-19}=\frac {6.626\times 10^{-34}\times 3\times 10^8}{\lambda}$

$\frac{3.68}{10^{19}}=\frac{19.878}{10^{26}\lambda}$

$3.68\times \:10^{26}\lambda=1.9878\times 10^{20}$

$\lambda=5.40163\times 10^{-7}\ m=540.16\times 10^{-9}\ m$

Also,

1 m = 10⁻⁹ nm

So,

$\lambda=540.16\ nm$

3 0

4 years ago

A storage tank contains nitrogen, oxygen, and carbon dioxide. The partial pressure of nitrogen is 0.79 ATM and Oxygen is 0.19 AT

MrMuchimi

54 percent

Explanation:

4 0

3 years ago

What is the answer ????

Lesechka [4]

i tried my hardest and its not aExplanation:

8 0

3 years ago