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
ladessa [460]
2 years ago
5

An unknown compound is processed using elemental analysis and found to contain 117.4 g of platinum, 28.91 g of carbon, and 33.71

g of nitrogen. How many moles of platinum are present in the compound? Need help ASAP
Chemistry
1 answer:
VLD [36.1K]2 years ago
4 0

Answer:

1 mole of platinum (Pt).

Explanation:

From the question given above, the following data were obtained:

Platinum (Pt) = 117.4 g

Carbon (C) = 28.91 g

Nitrogen (N) = 33.71 g

Number of mole of platinum =?

To obtain the number of mole of platinum present in the compound, we shall determine the empirical formula for the compound. The empirical formula for the compound can be obtained as follow:

Pt = 117.4 g

C = 28.91 g

N = 33.71 g

Divide by their molar mass

Pt = 117.4 /195 = 0.602

C = 28.91 /12 = 2.409

N = 33.71 /14 = 2.408

Divide by the smallest

Pt = 0.602 /0.602 = 1

C = 2.409 /0.602 = 4

N = 2.408 / 0.602 = 4

Therefore, the empirical formula for the compound is PtC₄N₄ => Pt(CN)₄

From the empirical formula for the compound (i.e Pt(CN)₄) we can see that the compound contains 1 mole of platinum (Pt).

You might be interested in
A chemist prepares a solution of magnesium chloride MgCl2 by measuring out 49.mg of MgCl2 into a 100.mL volumetric flask and fil
Flura [38]

Answer:  Molarity of Cl^- anions in the chemist's solution is 0.0104 M

Explanation:

Molarity : It is defined as the number of moles of solute present per liter of the solution.

Formula used :

Molarity=\frac{n\times 1000}{V_s}

where,

n= moles of solute

Moles=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{0.049g}{95g/mol}=5.2\times 10^{-4}moles  

V_s = volume of solution in ml = 100 ml

Now put all the given values in the formula of molarity, we get

Molarity=\frac{5.2\times 10^{-4}moles\times 1000}{100ml}=5.2\times 10^{-3}mole/L

Therefore, the molarity of solution will be 5.2\times 10^{-3}mole/L

MgCl_2\rightarrow Mg^{2+}+2Cl^-

As 1 mole of MgCl_2 gives 2 moles of Cl^-

Thus 5.2\times 10^{-3}  moles of MgCl_2 gives =\frac{2}{1}\times 5.2\times 10^{-3}=0.0104

Thus the molarity of Cl^- anions in the chemist's solution is 0.0104 M

6 0
3 years ago
Explain how index minerals allow a scientist to understand the history of a metamorphic rock?
Masteriza [31]
It allows a scientist to understand the history of metamorphic rock by estimating the temperature, depth, and pressure at which a rock undergoes metamorphism. Hope that helped!
5 0
2 years ago
Read 2 more answers
Irony can be seen in which of the following lines? (Mark all that apply.)
Flura [38]

Answer:

Awnser Is B

Explanation:

5 0
3 years ago
if you are using a formula where you need the change in temperature, explain why it is not important whether your temperatures a
alexandr1967 [171]

Answer:

This is because, Kelvins and Celcius degrees both agree at fixed points i.e; the lower fixed point and upper

5 0
3 years ago
Give the number of protons, neutrons and electrons in 99Tc
miss Akunina [59]

Explanation:

Tc - 99 is technetium 99.

It is a radioactive element that decays spontaneously. It has a half-life of 211,000 years and decays to stable ruthenium.

  • On the periodic table, it has an atomic number of 43;

Mass number  = 99

Atomic number = number of protons = number of electrons in atom

  Number of protons in Tc is 43

                      electron is 43

Mass number = number of protons + number of neutrons

  Number of neutrons = mass number - number of protons = 99-43 = 56

learn more:

Atomic number brainly.com/question/2057656

#learnwithBrainly

5 0
3 years ago
Other questions:
  • The population of the world nearly doubled between the years of 1965 and 2000.
    13·1 answer
  • Which type of spectrum can be produced by a solid, liquid, or gas?
    15·2 answers
  • Wade could tell it was the night before trash pickup the garbage can stank what was it about summer that made the trash smell so
    9·2 answers
  • Please help me and get me the right answer
    10·1 answer
  • What is the net ionic charge of an oxygen ion?
    8·1 answer
  • Lipid bilayers:A. depend on hydrophobic interactions to arrange the polar head groups together in the interior of the bilayer. B
    14·1 answer
  • Rolls of foil are 302 mm wide and 0.018 mm thick. (The density of foil is 2.7 g/cm3 .)
    10·1 answer
  • How many atoms of gold (Au) are equal to 212g of gold?
    7·1 answer
  • In the number 48.93, which digit is estimated?
    5·1 answer
  • Balance the following nuclear reactions
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!