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
iren [92.7K]
3 years ago
7

How many moles are in 1.51x10^26 atoms of xenon (Xe)? Please and thank you :)!!

Chemistry
1 answer:
RoseWind [281]3 years ago
3 0
<h3>Answer:</h3>

251 mol Xe

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 1.51 × 10²⁶ atoms Xe

[Solve] moles Xe

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

  1. [DA] Set up:                                                                                                     \displaystyle 1.51 \cdot 10^{26} \ atoms \ Xe(\frac{1 \ mol \ Xe}{6.022 \cdot 10^{23} \ atoms \ Xe})
  2. [DA] Multiply/Divide [Cancel out units]:                                                         \displaystyle 250.747 \ mol \ Xe

<u>Step 4: Check</u>

<em>Follow sig fig rule and round. We are given 3 sig figs.</em>

250.747 mol Xe ≈ 251 mol Xe

You might be interested in
Given that the molar mass of NaCl is 58.44 g/mol, what is the molarity of a solution that contains 87.75 g of NaCl in 500. mL of
Stells [14]

<u>Given information:</u>

Mass of NaCl (m) = 87.75 g

Volume of solution (V) = 500 ml = 0.5 L

Molar mass of NaCl (M) = 58.44 g/mol

<u>To determine:</u>

The molarity of NaCl solution

<u>Explanation:</u>

Molarity is defined as the number of moles of solute(n) dissolved per liter of solution (V)

i.e. M = moles of solute/liters of solution = n/V

Moles of solute (n) = mass of solute (m)/molar mass (M)

moles of NaCl = 87.75 g/58.55 g.mol-1 = 1.499 moles

Therefore,

Molarity of NaCl = 1.499 moles/0.5 L = 2.998 moles/lit ≅ 3 M

<u>Ans: (D)</u>

4 0
3 years ago
Read 2 more answers
What are thermal plasmas?
vitfil [10]
<span>plasmas that reach a temperature equal to their surroundings




----------------------=0uyjgyhjngytfgbhtfgbdc b gdf gb </span>
6 0
2 years ago
Read 2 more answers
If the half-life of an element is 150 years, how much of a 400 gram sample would remain in 750 years?
photoshop1234 [79]

Answer:

y

Explanation:

5 0
3 years ago
Acetic acid (HC2H3O2) is the active ingredient in vinegar. Calculate the mass percent composition of O in acetic acid.
skelet666 [1.2K]

Answer:

53.29% of acetic acid is Oxygen

Explanation:

Step 1: Given data

Acetic acid it's molecular formula is HC2H3O2. This means it consists of 3 elements Carbon, Hydrogen and oxygen.

Step 2: the molar masses

The molecular mass of acetic acid is:

4* H = 4* 1.01 g/mole

2* C = 2*12 g/mole

2*O = 2* 16 g/mole

Total molar mass = 4+ 24+32 = 60.052 g/mole

Step 3: Calculate the mass percent

32 g of the 60.052 g is Oxygen

(32/60.052) *100% = 53.29%

53.29% of acetic acid is Oxygen.

7 0
3 years ago
Read 2 more answers
Which list of elements consists of metalloids, only?
rewona [7]

Answer: D

Explanation: Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb), Tellurium (Te) and, Astatine (At) are all metalloids

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following describes a base? Select all that apply.
    14·2 answers
  • Draw the two-carbon hydrocarbons propane, propene, and propyne. Classify each molecule, and explain the differences between them
    11·1 answer
  • Which of the following compounds contains a double bond? A - NH3 B - CO2 C - N2 D - CI2
    5·1 answer
  • How can equilibrium of a closed system chemical reaction be disturbed? Select all that apply.
    15·2 answers
  • 99 POINTS!!!!!! PLEASE HELP ASAP!!!!!
    14·2 answers
  • Which system in the body is able to fight off most infectious diseases, such as the common cold?
    9·1 answer
  • What is a contributor of global warming?
    15·2 answers
  • Lennon-7<br> which cell is known as active cell<br>-​
    6·1 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
  • Use Appendix C to choose the solution with the higher pH:0.1MSn{NO₃)₂ or 0.1MCoNO₃)₂
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!