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Vlad1618 [11]
2 years ago
15

7. Assume that you have collected 867 L of nitrogen gas at STP. What is the mass of the nitrogen gas?

Chemistry
1 answer:
jekas [21]2 years ago
6 0

Answer:

1083.6 g

Explanation:

At STP, 1 mol of any given mass will occupy 22.4 L.

With the information above in mind we can<u> calculate how many moles of nitrogen gas (N₂) are there in 867 L</u>:

  • 867 L ÷ 22.4 L/mol = 38.7 mol

Finally we convert 38.7 moles of N₂ into grams, using its molar mass:

  • 38.7 mol * 28 g/mol = 1083.6 g
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Answer:

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Explanation:

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6 0
3 years ago
Which of these is an isoelectronic series? question 7 options: 1) na+, k+, rb+, cs+ 2) k+, ca2+, ar, s2– 3) na+, mg2+, s2–, cl–
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An isoelectronic series is where all of the ions listed have the same number of electrons in their atoms. When an atom has net charge of zero or neutral, it has equal number of protons and electrons. Hence, it means that the atomic number = no. of protons = no. of electrons. If these atoms become ions, they gain a net charge of + or -. Positive ions are cations. This means that they readily GIVE UP electrons, whereas negative ions (anions) readily ACCEPT electrons. So, to know which of these are isoelectronic, let's establish first the number of electron in a neutral atom from the periodic table:

Na=11; K=19; Rb=37; Cs = 55; Ca=20; S=16; Mg=12; Li=3; Be=4; B=5; C=6, Ar = 18

A. Na⁺: 11-1 = 10 electrons
     K⁺: 19 - 1 = 18 electrons
     Rb⁺: 37-1 = 36 electrons

B. K⁺: 19 - 1 = 18 electrons
    Ca²⁺: 20 - 2 = 18 electrons
    Ar:  18 electrons
    S²⁻:  16 +2 = 18 electrons

C. Na⁺: 11-1 = 10 electrons
    Mg²⁺: 12 - 2 = 10 electrons
     S²⁻:  16 +2 = 18 electrons

D. Li=3 electrons
    Be=4 electrons
    B=5 electrons
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The answer is letter B.
6 0
3 years ago
Describe the limitations of using models to represent atoms
morpeh [17]


Usually, a model is a depiction of a certain entity, never the real thing.  In times

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7 0
3 years ago
Jill formed ionic compounds using the index cards she combined sodium and zinc to form the compound na2zn is this a possible a i
expeople1 [14]
<span>No. Zn can only have oxidation states of 1+ or 2+. For this compound to be able to exist, the Zn would have to have an oxidation state of 2- to counteract the 2+ from the 2 sodium ions. Sodium ions each have a +1 charge, so the 2 sodium ions would carry a +2 charge. In order for the compound to exist, the net charge between the 2 sodium and 1 zinc atoms would need to be 0.</span>
5 0
3 years ago
14. Calculate the mass in grams of oxygen required to react completly with 0.75 moles of Aluminum.
cluponka [151]
  • 3mols of O_2 react with 4mol of Al
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Moles of O_2:-

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Mass of O_2:-

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Option B

8 0
2 years ago
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