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
sergeinik [125]
2 years ago
6

(0904) How many atoms are there in 56.2 grams of Krypton, Kr?

Chemistry
1 answer:
Luba_88 [7]2 years ago
8 0

Answer:

56.2÷6.02×10^23

=9.34×10^23

Explanation:

Divide the given mass of the atom by the mass of an Atom (the avogadro's constant) to find the number of atoms in the given mass.

You might be interested in
DUPLICATE. The half-equivalence point of a titration occurs half way to the end point, where half of the analyte has reacted to
Law Incorporation [45]
At the half equivalence point [HA] = [A-] and pH = pKa 

<span>if Ka is 5.2e-5 then pKa = pH = 4.28</span>
5 0
3 years ago
2) Show the calculation of Kc for the following reaction if an initial reaction mixture of 0.800 mole of CO and 2.40 mole of H2
nadezda [96]

Answer:

Kc = 3.90

Explanation:

CO reacts with H_2 to form CH_4 and H_2O. balanced reaction is:

CO(g) + 3H_2 (g) \leftrightharpoons CH_4(g)  +  H_2O(g)

No. of moles of CO = 0.800 mol

No. of moles of H_2 = 2.40 mol

Volume = 8.00 L

Concentration = \frac{Moles}{Volume\ in\ L}

Concentration of CO = \frac{0.800}{8.00} = 0.100\ mol/L

Concentration of H_2 = \frac{2.40}{8.00} = 0.300\ mol/L

                 CO(g) + 3H_2 (g) \leftrightharpoons CH_4(g)  +  H_2O(g)

Initial            0.100      0.300             0   0

equi.            0.100 -x    0.300 - 3x     x    x

It is given that,

at equilibrium H_2O (x) = 0.309/8.00 = 0.0386 M

So, at equilibrium CO = 0.100 - 0.0386 = 0.0614 M

At equilibrium H_2 = 0.300 - 0.0386 × 3 = 0.184 M

At equilibrium CH_4 = 0.0386 M

Kc=\frac{[H_2O][CH_4]}{[CO][H_2]^3}

Kc=\frac{0.0386 \times 0.0386}{(0.184)^3 \times 0.0614} =3.90

8 0
3 years ago
Which statement is true about both a solid and a gas? A. They both fill a container. B. The both have defined shapes in any spac
Fiesta28 [93]
In any state of matter there is always motion in the atoms. So the answer would be C even though solids are together and gases atoms are spread out
4 0
2 years ago
Read 2 more answers
I need help!! i need to make it like 3:2
anyanavicka [17]

Answer:

use visual studio code and put in this print{3:2}-1

Explanation:

4 0
2 years ago
50 points!!!<br> Please help me
oee [108]
30. mixture of compounds
31. compound
32. element
33. compound
34. compound
34. mixture of elements and compounds
5 0
2 years ago
Other questions:
  • How many moles of glucose (C6H12O6) are in 1.5 liters of a 4.5 M C6H12O6 solution
    12·1 answer
  • Animals return water to the air through:
    8·2 answers
  • Which direction does air circulate into low pressure zones in the northern and southern hemisphere
    12·2 answers
  • Which of the following sequences lists the relative sizes of particles in a water mixture from smallest to largest?
    5·1 answer
  • Which term describes a substance that increases the concentration of hydroxide (OH-) ions in solution? *
    7·2 answers
  • Which statements about cirrus clouds are true? Choose all answers that are correct. A. Cirrus clouds form high in the sky. B. Ci
    6·1 answer
  • Helppppp!!!! Please.....
    6·1 answer
  • Help me guys plzlzlz
    15·2 answers
  • There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 14.55%. A weighted average uses the percen
    15·1 answer
  • Which type of bonding involves the sharing of electrons, in which the electrons are confined close to the more electronegative e
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!