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
egoroff_w [7]
3 years ago
12

How many atoms of iodine are in 12.75g of CaI2? Hint. How many Iodines are there in one CaI2 particle?

Chemistry
1 answer:
xenn [34]3 years ago
4 0

Answer:

5.225x10^{22}atoms\ I

Explanation:

Hello!

In this case, since 12.75 g of calcium iodide has the following number of moles (molar mass = 293.89 g/mol):

n_{CaI_2}=12.75gCaI_2*\frac{1molCaI_2}{293.89gCaI_2}=0.0434molCaI_2

In such a way, since 1 mole of calcium iodide contains 2 moles of atoms of iodine, and one mole of atoms of iodine contains 6.022x10²³ atoms (Avogadro's number), we compute the resulting atoms as shown below:

atoms\ I=0.0434molCaI_2*\frac{2molI}{1molCaI_2} *\frac{6.022x10^{23}atoms\ I}{1molI} \\\\atoms\ I = 5.225x10^{22}atoms\ I

Best regards!

You might be interested in
Explain how to count the number of elements in a compound
valentina_108 [34]

Answer:

Using the formula cards again, add the coefficient of 2 in front of the formula and have them recalculate the number of each element and the total number of atoms in each element.

Explanation:

5 0
3 years ago
If 18 grams of oxygen reacts completely with 4 grams of hydrogen, we would expect how many grams of water?
seraphim [82]

Answer: 22 grams because mass cannot be created or destroyed

Explanation: I just took the test

4 0
3 years ago
Read 2 more answers
If 10.0 moles of sulfur dioxide react with excess chlorine gas, what is the theoretical yield (in grams) of CI2O produced?
xz_007 [3.2K]

Answer:

869 g Cl₂O

Explanation:

To find the theoretical yield of Cl₂O, you need to (1) convert moles SO₂ to moles Cl₂O (via mole-to-mole ratio from reaction coefficients) and then (2) convert moles Cl₂O to grams Cl₂O (via molar mass). It is important to arrange the conversions/ratios in a way that allows for the cancellation of units (the desired unit should be in the numerator). The final answer should have 3 sig figs to reflect the sig figs of the given amount (10.0 moles).

1 SO₂ (g) + 2 Cl₂ (g) ----> 1 SOCl₂ (g) + 1 Cl₂O (g)

Molar Mass (Cl₂O): 2(35.453 g/mol) + 15.998 g/mol

Molar Mass (Cl₂O): 86.904 g/mol

10.0 moles SO₂         1 mole Cl₂O            86.904 g
------------------------  x  ----------------------  x  ------------------  = 869 g Cl₂O
                                    1 mole SO₂              1 mole

6 0
1 year ago
Stage in a star's evolution formed as the core of a main sequence star uses up its helium and the outer layers escape into space
Lena [83]

Answer: the answer is white dwarf

Explanation:

3 0
3 years ago
Read 2 more answers
Helppppppp please please please please please
weqwewe [10]
The answer is for this question is c
8 0
3 years ago
Read 2 more answers
Other questions:
  • What occurs only on the surface of the substance
    11·1 answer
  • Whatcha energy transfer occurs when a student blows a whistle? The top one
    10·2 answers
  • PLEASE ANSWERRRRRRRRRRRRR
    9·2 answers
  • Andrew walks through his garden and observes that the shapes of dewdrops are not always the same. Suppose he wants to investigat
    9·1 answer
  • How many orbitals are in the n=3 level
    8·2 answers
  • What four properties do all waves have in common
    9·2 answers
  • Define the term homeostasis
    15·1 answer
  • Nepal is rich in species diversity why?? Explain with any three reason. Help this beginer out !!!​
    6·1 answer
  • Which of the following would be expected to have the highest surface tension?
    5·1 answer
  • ______ fats contain no carbon-carbon double bonds, whereas ______ fats contain carbon-carbon double bonds.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!