His pay is D - $690, because 40x15=600 and then you add 3 hours of double pay (30x3=90), so 600+90=690
The options given are as follows
a. Cl2
b. NO
c. NO2
d. SO2
<span>e. C2H6
</span>
we can use the ideal gas law equation to find the number of moles of gas in the container
PV = nRT
where
P - pressure - 1.38 atm x 101 325 Pa/atm = 139 829 Pa
V - volume - 0.682 x 10⁻³ m³
n - number of moles
R - universal gas constant - 8.314 Jmol⁻¹K⁻¹
T - temperature - 60 °C + 273 = 333 K
Substituting these values in the equation
139 829 Pa x 0.682 x 10⁻³ m³ = n x 8.314 Jmol⁻¹K⁻¹ x 333 K
n = 0.0344 mol
mass present - 1.58 g
molar mass = mass present / number of moles
therefore molar mass - 1.58 g / 0.0344 mol = 46 g/mol
the answer is NO₂
the molar mass of NO₂ is - 14 + (16x2) = 14 + 32 = 46
therefore unknown gas is NO₂
Answer:
Option (d) is correct
N³⁻ > F⁻ > Mg²⁺ > Si⁴⁺
Explanation:
Total electrons for all the species = 10
So these are <u>iso electronic</u> with each other.
We know
Ionic radii ∝
- Si⁴⁺ has 14 protons and 10 electrons
- Mg²⁺ has 12 protons and 10 electrons
- N³⁻ has 7 protons and 10 electrons
- F⁻ has 9 protons and 10 electrons
- Iso electronic species with greatest number of protons have small size and vice versa.
- So Si⁺⁴ have smallest size and N³⁻ have largest in size