Answer:
.
Explanation:
Eardrum or tympanic membrane changes sound to vibration and pass through malleus, incus and stapes.
The law of conservation states that matter can't be created or destroyed in a chemical reaction. When balancing an equation, both sides need to be equal. If both sides don't have the same amount of atoms for each element, it is unbalanced
M(Na2CO3•10H2O)=23*2+12+16*3+180=286g/mol
So lets take 1 mol of this compound
m(comp)=286 gram
m(H2O)=180 gramm
w(h2o)=180/286=0.6293(62.93%)
Answer 62.93% water
228 packages
8000 / 35 = 228.57 —> You want to round down in this context, because 229 packages would exceed the weight limit.