Answer:
15.63
Explanation:
250g O2 x 1 mol O2 x 2mol HgO / 32 g O2 x 1 mol O2
Explanation:
The steps given in the question are incorrect.
Step 1 should be convert atoms to moles (n). Step 2 should be convert moles (n) to mass (m).
Step 1
Use dimensional analysis to convert the number of atoms to moles.
1 mole atoms = 6.022 × 10²³ atoms
n(Ag) = 2.3 × 10²⁴ Ag atoms × (1 mol Ag/6.022 × 10²³ Ag atoms) = 3.8193 mol Ag
Step 2
Convert the moles of Ag to mass.
mass (m) = moles (n) × molar mass (M)
n(Ag) = 3.8193 mol Ag
M(Ag) = atomic weight on the periodic table in g/mol = 107.868 g Ag/mol Ag
m(Ag) = 3.8193 mol × 107.868 g/mol = 412 g Ag = 410 g Ag rounded to two significant figures
The mass of 2.3 × 10²⁴ Ag atoms is approximately 410 g.
The length of the flower garden is 529 centimeters.what is its length in meter?
240mL = 0,24L = 0,24 dm³
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C = n/V
n = 3,5 M × 0,24dm³
n = 0,84 mol NaOH
1 mole NaOH ---------- 40g
0,84 mol ----------------- X
X = 40×0,84
X = 33,6g NaOH
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