Answer:
672.6 grams
Explanation:
molar mass of 1 mol of C₈H₁₈ = 114 grams
so mass of 5.9mol of C₈H₁₈ = 114* 5.9= 672.6 grams
The speed of sound depends upon
a) air density
b) temperature
c) pressure
d) humidity
so there can be different reasons that the instrument goes out of tune outside.
However in the given options the best is The speed of sound decreases with a decrease in temperature.
Answer:
4.17e+22 atoms of tin are present in the cube
Explanation:
We don't require the size of the cube. With the mass and the molar mass of tin = 118.7 amu we can find moles of Tin. As 1 mol = 6.022x10²³ atoms we can find the number of atoms:
<em>Moles Tin:</em>
8.21g * (1mol / 118.7g) = 0.0692 moles Tin
<em>Atoms Tin:</em>
0.0692 moles Tin * (6.022x10²³ atoms / mol) =
<h3>4.17e+22 atoms of tin are present in the cube</h3>
There should be 3 valence electrons surrounding the aluminum ion
Answer:
the coefficients in a chemical equation give the number of molecules (or atoms) involved in the reaction. In the example reaction, two molecules of hydrogen react with one molecule of oxygen and produce two molecules of water. Second: the coefficients give the number of moles of each substance involved in the reaction.