Answer:
Physical.
Explanation:
It is not becoming or making a new substance.
Answer:
Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. Often, physical changes can be undone, if energy is input.
Hope this helped.
Answer:
1.42 Kg of NaHCO3
Explanation:
From
Co= 10 pd/M
Where;
Co= concentration of the stock solution of acid
p= percentage of raw acid = 36%
d= density of the acid= 1.138g/mL
M= molar mass of the acid= 36.5 g/mol
Co= 10 × 36 × 1.138/36.5
Co= 11.22 M
Number of moles of acid= CV = 11.22 M × 1.508 L= 16.9 moles
The reaction equation is;
NaHCO3(aq)+HCl(aq)→NaCl(aq)+H2O(l)+CO2(g)
If 1 mole of NaHCO3 reacts with 1 mole of HCl
Then 16.9 moles of HCl reacts with 16.9 moles of NaHCO3
Hence 16.9 moles of NaHCO3 is required to neutralize the HCl.
From
n= m/ M
Where;
n= number of moles = 16.9
m= mass of NaHCO3= ??
M= molar mass of NaHCO3= 84.007 g/mol
m= n× M/1000
m= 16.9 × 84.007 /1000
m= 1.42 Kg
Hmmmm not sure I’ll tell u when I know
Answer:
double replacement is the answer