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
GenaCL600 [577]
1 year ago
14

a cube of iron pyrite is 0.31 cm on each side and has a mass of 0.040g. what is the density of the sample?

Chemistry
1 answer:
ryzh [129]1 year ago
8 0

The density of the iron pyrite cube is 1.343 g/cm³.

Given,

Side of iron pyrite cube = 0.31 cm

Mass of iron pyrite = 0.040 g

The volume of iron pyrite cube = s³ cm³

Or, volume = 0.029791 cm³

We have to find the density of the sample.

Density is defined as the mass per unit volume. Or, it is the ratio of mass to the volume of the substance.

Using the formula for density, we get,

Density = mass/volume

Or, density = 0.40/0.029791

Or, density = 1.343 g/cm³

Hence, the density of the iron pyrite cube is 1.343 g/cm³.

To learn more about density, visit: brainly.com/question/15164682

#SPJ9

You might be interested in
Answer quick plz
muminat

Answer:

i dont know

Explanation:

8 0
3 years ago
Tasting is not advisable method for identifying substance?? True or False​
NARA [144]
False you should never taste something if you don’t know what it is
4 0
3 years ago
How would you prepare 2.5 L of a 0.800M solution of KNO3?
statuscvo [17]
First  find the mass of <span>solute:

Molar mass KNO</span>₃ = <span>101.1032 g/mol

mass =  Molarity * molar mass * volume

mass = 0.800 * 101.1032 * 2.5

mass = 202.2064 g of KNO</span>₃

<span>To prepare 2.5 L (0800 M) of KNO3 solution, must weigh 202.2064 g of salt, dissolve in a Beker, transfer with the help of a funnel of transfer to a volumetric flask, complete with water up to the mark, capping the balloon and finally shake the solution to mix.</span>

hope this helps!
7 0
3 years ago
Número cuántico que designa el nivel de energía en el que se localiza un electrón:
Fed [463]

Answer:

Creo que la respuesta es n. Transalation : I think the answer is N.

Explanation:

4 0
3 years ago
The energy of any one-electron species in its nth state (n = principal quantum number) is given by E = –BZ2 /n2 where Z is the c
Ivahew [28]

Explanation:

(a) The given data is as follows.

            B = 2.180 \times 10^{-18} J

            Z = 4 for Be

Now, for the first excited state n_{f} = 2; and n_{i} = \infinity if it is ionized.

Therefore, ionization energy will be calculated as follows.

         I.E = \frac{-Bz^{2}}{\infinity^{2}} - (\frac{-2.180 \times 10^{-18} J /times (4)^{2}}{(2)^{2}})

              = 8.72 \times 10^{-18} J

Converting this energy into kJ/mol as follows.

           8.72 \times 10^{-18} J \times 6.02 \times 10^{23} mol  

           = 5249 kJ/mol

Therefore, the ionization energy of the Be^{3+} ion in its first excited state in kilojoules per mole is 5249 kJ/mol.

(b) Change in ionization energy is as follows.

         \Delta E = -Bz^{2}(\frac{1}{(4)^{2}} - {1}{(2)^{2}}) = \frac{hc}{\lambda}

   \frac{hc}{\lambda} = 0.1875 \times 2.180 \times 10^{-18} J \times (4)^{2}                

        \lambda = \frac{6.626 \times 10^{-34} \times 2.998 \times 10^{8} m/s}{0.1875 \times 2.180 \times 10^{-18} J \times 16}

                     = 303.7 \times 10^{-10} m

or,                 = 303.7^{o}A

Therefore, wavelength of light given off from the Be^{3+} ion by electrons dropping from the fourth (n = 4) to the second (n = 2) energy levels 303.7^{o}A.

5 0
3 years ago
Other questions:
  • What mass of NH4NO3 would you need to make 250.0mL of a 0.78M solution?
    6·2 answers
  • The maximum number of electrons allowed in the fourth energy level of an h atom is
    12·1 answer
  • How does water return to the ocean
    7·1 answer
  • __is when two genetic sequences bind together because of the hydrogen bonds that form between the base pairs ​
    13·1 answer
  • A person who has a mass of 60kg run up a flight of stairs 12m high in 20 seconds What is the weight of the person​
    7·1 answer
  • Fill in the blank ......
    9·2 answers
  • What do isotopes of an element have in common? How do they differ?
    6·2 answers
  • What element is classified as a noble gas?
    8·1 answer
  • Magneisum and Bromine formation
    11·1 answer
  • How do you explain the ability of nonmetals to attract electrons to themselves?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!