Answer:
a new model of the atom that describe electrons as being in a cloud
Explanation:
The balanced equation for the above reaction is as follows;
Mg + 2HCl ---> MgCl₂ + H₂
stoichiometry of Mg to HCl is 1:2
number of Mg moles reacted - 3.5 mol
1 mol of Mg reacts with 2 mol of HCl
therefore 3.5 mol of Mg requires - 2 x 3.5 = 7.0 mol of HCl
number of HCl moles required to completely react with 3.5 mol of Mg is 7.0 mol of HCl
Answer:
40.06
Explanation:
<u>(23 * 39) + (48 * 40) + (29 * 41)</u>
100
= 40.06
formula:
<u>(% of isotope A * mass of A) + (% of isotope B * mass of B) ......</u>
100
Answer:
B extinction
Explanation:
as the species does not exist any more, the species is extinct, therefore making the pictured fossil of an extinct species
hope this helps
Vinegar is denser than water
