1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zaharov [31]
3 years ago
13

An ionic compound is composed of the following elements:

Chemistry
2 answers:
Amiraneli [1.4K]3 years ago
6 0

Answer: N3 H12 P O3

Explanation:

From the question :

N = 31.57% H = 9.10% P = 23.27%

O= 36.06%

Divide each of the element by their respective relative atomic masses.

N = 31.57 / 14 = 2.26

H = 9.10/ 1 = 9.10

P = 23.27 / 31= 0.750

O =36.06 / 16 = 2.25

Divide each answer by the lowest of them all, we then have:

N = 2.26/ 0.750 = Approx = 3

H = 9.10 / 0.750 = Approx = 12

P = 0.750/ 0.750= 1

O = 2.25 / 0.750 = Approx = 3

The empiral formula is

N3 H12 P O3

Marysya12 [62]3 years ago
6 0

Answer:

The empirical formula for the compound is  (NH₄)₃PO₃

Explanation:

Here we have

Nitrogen Molar mass = 14.01 g/mol, Percentage = 31.57%

Hydrogen Molar mass = 1.00784 g/mol, Percentage = 9.10%

Phosphorus Molar mass = 30.973762 g/mol, Percentage = 23.27%

Oxygen Molar mass = 15.999 g/mol, Percentage =  36.06%

Therefore the number of moles of each element per 100 g of the ionic compound is as follows;

Number of moles, n = Mass/(Molar Mass)

Mass of nitrogen, N in 100 g of ionic compound = 31.57 g n = 2.253 moles

Mass of Hydrogen, H in 100 g of ionic compound = 9.10 g, n = 9.029 moles

Mass of Phosphorus, P in 100 g of ionic compound = 23.27 g, n = 0.7513 moles

Mass of Oxygen, P in 100 g of ionic compound = 36.06 g, n = 2.2539 moles

Dividing by the smallest mole ratio, of 0.7513 (that of phosphorus) we have;

N = 3 moles

H = 12.0184 ≈ 12 moles  

P = 1 moles

O = 3 moles

Therefore, we have the empirical formula as follows;

N₃H₁₂PO₃ or (NH₄)₃PO₃.

You might be interested in
Which is greater, the moons period of rotation or its period of revolution?
balu736 [363]
C. they are equal

This is because it takes about the same amount of time for the moon to rotate around its axis that it does to rotate around the Earth.
3 0
3 years ago
Read 2 more answers
Help me find the word elliptical
maria [59]
Omg where is it?? i’ve been looking for a long time
7 0
2 years ago
A 25.0-mL sample containing Cu2+ gave an instrument signal of 25.2 units (corrected for a blank). When exactly 0.500 mL of 0.027
irga5000 [103]

Answer:

The molar concentration of Cu²⁺ in the initial solution is 6.964x10⁻⁴ M.

Explanation:

The first step to solving this problem is calculating the number of moles of Cu(NO₃)₂ added to the solution:

C = \frac{n}{V} \\0.0275 = \frac{n}{0.0005} \\

n = 1.375x10⁻⁵ mol

The second step is relating the number of moles to the signal. We know the the n calculated before is equivalent to a signal increase of 19.9 units (45.1-25.2):

1.375x10⁻⁵ mol _________ 19.9 units

        x              _________  25.2 units

x = 1.741x10⁻⁵mol

Finally, we can calculate the Cu²⁺ concentration :

C = 1.741x10⁻⁵mol / 0.025 L

C = 6.964x10⁻⁴ M

7 0
3 years ago
EXTRA POINTSSS 1. A solution at 25 degrees Celsius is 1.0 × 10–5 M H3O+. What is the concentration of OH– in this solution?
AlekseyPX

Answer:

Concentration of OH⁻:

1.0 × 10⁻⁹ M.

Explanation:

The following equilibrium goes on in aqueous solutions:

\text{H}_2\text{O}\;(l)\rightleftharpoons \text{H}^{+}\;(aq) + \text{OH}^{-}\;(aq).

The equilibrium constant for this reaction is called the self-ionization constant of water:

K_w = [\text{H}^{+}]\cdot[\text{OH}^{-}].

Note that water isn't part of this constant.

The value of K_w at 25 °C is 10^{-14}. How to memorize this value?

  • The pH of pure water at 25 °C is 7.
  • [\text{H}^{+}] = 10^{-\text{pH}} = 10^{-7}\;\text{mol}\cdot\text{dm}^{-3}
  • However, [\text{OH}^{-}] = [\text{H}^{+}]=10^{-7}\;\text{mol}\cdot\text{dm}^{-3} for pure water.
  • As a result, K_w = [\text{H}^{+}] \cdot[\text{OH}^{-}] = (10^{-7})^{2} = 10^{-14} at 25 °C.

Back to this question. [\text{H}^{+}] is given. 25 °C implies that K_w = 10^{-14}. As a result,

\displaystyle [\text{OH}^{-}] = \frac{K_w}{[\text{H}^{+}]} = \frac{10^{-14}}{1.0\times 10^{-5}} = 10^{-9} \;\text{mol}\cdot\text{dm}^{-3}.

8 0
3 years ago
What is the formula for the polyatomic ion and name the following compound<br>Sn(NO2)2​
garri49 [273]
There are 9 polyatomic ions so which one and the compound “Sn(NO2)2 is Tin(ll) Nitrite
3 0
3 years ago
Read 2 more answers
Other questions:
  • Why do sugar crystals dissolve faster in hot water than in cold water?
    5·2 answers
  • What`s the lewis structure for CH3OO?
    6·1 answer
  • PLZ ANSWER NOW
    10·2 answers
  • Which excerpt from amy tan's "fish cheeks" is most clearly an example of conflict?
    14·2 answers
  • Which of the following is the best definition of a scientific theory? A predicted experimental outcome A mathematical model (an
    12·1 answer
  • Has colored salts that will produce colored aqueous solutions
    11·1 answer
  • The density of water is 1.00 g/cm3. The density of ice is 0.92 g/cm3. By what percent is the volume increased when water is froz
    8·2 answers
  • Acetylene gas (ethyne; HC≡CH) burns with oxygen in an oxyacetylene torch to produce carbon dioxide, water vapor, and the heat ne
    7·1 answer
  • List the number of
    12·1 answer
  • SECTIONA ANSWERALL QUESTIONS (5 MARKS PER QUESTION) 1:03 mixing a solution of silver nitrate and dilute hydrochloric acid a whit
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!