From rocks and lava and earthquakes
Answer:
120 grams
Explanation:
Data:
Volume = V= 2 L
Molarity = 1.5 M
Molecular masses:
Na = 23, O= 16, H=1
Total molecular mass =M= 23+16+1 = 40
mass = m = ?
To find the mass we need to find moles from molarity formula:
Molarity = n/V
n= Molarity x V
= 1.5 x 2
n= 3 moles
Now we can find mass:
number of moles = given mass / molecular mass
n = m/M
m= n x M
= 3 x 40
m = 120 grams
Answer:
The increase in mass is because the iron fillings have combined with a sulfide to produce iron sulfide and so the mass will increase.
In such a reaction like this, the mass of the reactants must be conserved. By so doing, the mass of reactants and products must be the same.
When two substances combine together, their masses added up to that of the individual masses. This helps to conserve the mass.
Explanation:
The increase in mass is because the iron fillings have combined with a sulfide to produce iron sulfide and so the mass will increase.
In such a reaction like this, the mass of the reactants must be conserved. By so doing, the mass of reactants and products must be the same.
When two substances combine together, their masses added up to that of the individual masses. This helps to conserve the mass.
<h3><em>Heat flows from a warmer object to a cooler object.</em></h3><h3><em>hope it helps =)</em></h3>
