Answer:
correct answer is option (A) 0.012 mol
Explanation:
Given:
Molar mass of the platinum, M = 195 g/mol
Mass of the platinum in the ring, m = 2.3 g
Now,
the number of moles (n) is calculated as :
thus,
on substituting the respective values in the formula, we get
or
n = 0.01179 mol ≈ 0.012 mol
Hence, the correct answer is option (A) 0.012 mol
Answer:
Stars emit colors of many different wavelengths, but the wavelength of light where a star's emission is concentrated is related to the star's temperature - the hotter the star, the more blue it is; the cooler the star, the more red it is
Answer:
<span>5010J</span>
Explanation:
Work is force times distance, or
<span>W=F⋅d</span>.
Substitute in values from the question to get
<span>W=8.35⋅<span>102</span>N⋅6m=50.1⋅<span>102</span>Nm=5010<span>J</span></span>