Answer:
A: Beryllium (Be)
Explanation:
the traits listed are traits of metals, and beryllium is the only choice presented that is a metal.
Use the ideal gas law PV = nRT and manipulate it to solve for n. PV/RT = n.
Convert to SI units:
660ml -> 0.660 L
27 degrees -> 300 K
Leave Pressure as is
Use 62.36368 for R becuase you are using mmHg for Pressure.
Now plug into the equation to get about 0.025928 mols. Divide the 3.30 grams by the mols to get about 127 g/mol.
Given parameters:
Heat of fusion of water = 334j/g
Mass of ice = 45g
Temperature of ice = 0.0°c
Unknown:
Amount of heat needed to melt = ?
Solution:
This is simply a phase change and a latent heat is required in this process.
To solve this problem; use the mathematical expression below;
H = mL
where m is the mass
L is the heat of fusion of water;
H = 45 x 334 = 15030J
<span>When naming acids, the prefix hydro- is used when the name of the acid anion ends in "-ide". Simple acids, known as binary acids, have only one anion and one hydrogen. These anions usually have the ending -ide. For example, hydrogen chloride becomes hydrochloric acid.</span>
