Answer:
3.96 × 10⁻³ mol Pb
Explanation:
Step 1: Find molar mass
Pb (Lead) - 207.2 g/mol
Step 2: Use Dimensional Analysis
= 0.003962 mol Pb
Step 3: Simplify
We have 3 sig figs
0.003962 mol Pb ≈ 0.00396 mol Pb
0.00396 mol Pb = 3.96 × 10⁻³ mol Pb
The volume of the brick in cubic meters is 0.00108 m³
<u><em>calculation</em></u>
<u><em> </em></u> volume of a brick =length x width x height
-length = 15 cm
width = 6.0 cm
height = 12 cm
volume is therefore= 15 cm x 6.0 cm x 12 cm =1080 cm³
convert 1080 cm³ into m³
that is 1 cm³ = 1 x 10^-6m³
1080 cm³ = ? m³
by cross multiplication
=[ (1080 cm³ x 1 x10^-6 m³) / 1 cm³] = 0.00108 m³
Answer:
yes yes yes yes yes yrs
Explanation:
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Answer:
271.0 L
Explanation:
Given data:
Number of moles of hydrogen = 12.1 mol
Volume = ?
Solution:
The one mole of gas at standard temperature and pressure occupy the volume of 22.4 L.
One mole volume = 22.4 L
For 12.1 mol,
12.1 mol × 22.4 L / 1 mol
271.0 L
Now by putting the standard conditions we can calculate the number of moles and check the answer weather it is wrong or right.
Formula:
PV = nRT
R = general gas constant = 0.0821 atm.L/mol.K
standard temperature = 273.15 K
standard pressure = 1 atm
Now we will put the values in formula.
PV = nRT
n = 1 atm × 271.0 L / 0.0821 atm.L/mol.K × 273.15 K
n = 271.0 L .atm / 22.4 atm. L/mol
n = 12.1 mol
so answer is correct
Isotope is two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei.
Carbon would have 6 protons, 6 Neutrons and 6 electrons.
Sulfur would have 16 protons, 16 neutrons and 16 electrons.
I hope that was a little helpful!
