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Schach [20]
3 years ago
13

How many total atoms are in 0.720 g of p2o5

Chemistry
2 answers:
Katarina [22]3 years ago
5 0

Answer:

4.92x10^{23}atoms,total

Explanation:

Hello,

The following mole-mass relationship is applied to find the atoms of P and O, taking into account that the molar mass of P2O5 is 78g/mol:

M_{P_2O_5}=31*2+16*5=78g/mol\\atoms_{P}=0.720gP_2O_5*\frac{1molP_2O_5}{78gP_2O_5} *\frac{2molP}{1molP_2O_5}*\frac{6.022x10^{23}atoms P}{1molP} =4.82x10^{22}atoms P\\atoms_{O}=0.720gP_2O_5*\frac{1molP_2O_5}{78gP_2O_5} *\frac{5molO}{1molP_2O_5}*\frac{6.022x10^{23}atoms O}{1molO} =1.2x10^{23}atoms O

Now, by adding those atoms, one concludes:

1.2x10^{23}atoms O+4.82x10^{22}atomsP=4.92x10^{23}atoms,total

Best regards.

11Alexandr11 [23.1K]3 years ago
3 0
The total is 7 atoms in all
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2 years ago
Of the following substances, ________ has the highest boiling point. Of the following substances, ________ has the highest boili
kolezko [41]

Answer:

Of the following substances, <u>PCl₃</u> has the highest boiling point

Explanation:

The given substances and their boiling point from online resources are;

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5 0
3 years ago
How many moles of copper are in 1.51 x 1024 Cu atoms?
kkurt [141]
<h3>Answer:</h3>

2.51 mol Cu

<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>

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

<u>Step 1: Define</u>

1.51 × 10²⁴ atoms Cu

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

Avogadro's Number

<u>Step 3: Convert</u>

  1. Set up:                                \displaystyle 1.51 \cdot 10^{24} \ atoms \ Cu(\frac{1 \ mol \ Cu}{6.022 \cdot 10^{23} \ atoms \ Cu})
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<u>Step 4: Check</u>

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

2.50747 mol Cu ≈ 2.51 mol Cu

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Explanation:

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