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Fofino [41]
3 years ago
6

How can atoms be neutral if they contain charged particles?

Chemistry
1 answer:
rewona [7]3 years ago
4 0
Stability of atoms is determined by neutron:proton ratio. This n/p ratio is 1:1 for elements below atomic number 20. Hope this helps.
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Ammonia react with phosphorus acid to form a compound that contains 28.2% of nitrogen 20.8%, phosphorus 8.1% of hydrogen 42.9%ox
____ [38]

Answer:

Empirical formula will be (NH₄)₃PO₄, which matches the molecular formula

Explanation:

This is the reaction:

NH₃ + H₃PO₄ → 28.2% N, 20.8% P, 8.1% H, 42.9% O

In 100 g of compound we have:

28.2 g N

20.8 g of P

8.1 g of H

42.9 g of O

Now we divide each  between the molar mass:

28.2 g / 14 g/mol = 2.01 mol

20.8 g / 30.97 g/mol = 0.671 mol

8.1 g / 1 g/mol = 8.1 mol

42.9 g / 16 g/mol =  2.68 mol

And we divide again between the lowest value of moles

2.01 mol / 0.671 mol → 3

0.671 mol / 0.671 mol → 1

8.1 mol / 0.671 mol → 12

2.68 mol / 0.671 mol → 4

Molecular formula will be: N₃PH₁₂O₄ → (NH₄)₃PO₄

Empirical formula will be (NH₄)₃PO₄, which matches the molecular formula

3 0
4 years ago
Convert 550 Hm to mm
muminat

Answer:

55,000,000

Explanation:

550 hectometers [hm] = 55,000,000 millimeters [mm]

6 0
3 years ago
At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average intensity of approximately
aleksandrvk [35]

I = average intensity of sunlight reaching at Madison = 2000 Js⁻¹m⁻²

A = area on which the light strike = 4.80 cm² = 4.80 x 10⁻⁴ m²

energy received per second by the area is given as

E = IA

inserting the values

E = (2000) (4.80 x 10⁻⁴)

E = 0.96 J

λ = wavelength of the photons in the sunlight = 510 x 10⁻⁹ m

c = speed of light = 3 x 10⁸ m/s

h = plank's constant = 6.63 x 10⁻³⁴ J-s

n = number of photons received per second

energy received per second is also given as

E = n h c /λ

inserting the values

0.96 = n (6.63 x 10⁻³⁴) (3 x 10⁸) /(510 x 10⁻⁹)

n = 2.5 x 10¹⁸ per second

7 0
3 years ago
What is the voltage of a galvanic cell with 1 silver electrode and 1 gold electrode?
Anestetic [448]
<h3>0.76 V</h3><h3 /><h3>The voltmeter shows that the standard cell potential of a galvanic cell consisting of a SHE and a Zn/Zn2+ couple is E°cell = 0.76 V.</h3><h3 />

7 0
3 years ago
Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. Which label belongs in the area marked z?
Elan Coil [88]

Answer:

Soil

Explanation:

Plants(a.k.a. Producers) obtain nitrogen(N) from the soil by absorption through their roots.

6 0
4 years ago
Read 2 more answers
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