Answer:
The concentration of NaOH in the final solution 0.0584 mole/lit
Explanation:
- 620 ml of aqueous 0.25 M NaOH
- Total moles = 0.21 + 0.155 = 0.365 moles
- 1.65 gallons = 3.785 lit x 1.65 = 6.245929 lit (∵ 1 gallon = 3.785 lit)
So Molarity of the solution after mixing 
∴ The concentration of NaOH in the final solution 0.0584 mole/lit
Balls go up & down and all around
Hope I helped! ( Smiles )
1.When a clam shell (CaCO3) is heated,carbon dioxide (CO2) is given off and a white powder, calcium oxide (CaO), forms.
This is a decomposition reaction because calm shell CaCO3 is getting decomposed into other products.
2.'Nitrogen pentoxide (N2O5) is an unstable gas that changes to nitrogen dioxide (NO2) and oxygen (O2) at room temperature.
This is also a decomposition reaction as nitrogen pentaoxide is getting decomposed.
3.Sodium (Na) reacts with chlorine (Cl) to give sodium chloride (NaCl).
This is a synthesis reaction as two reactants are producing a product.
4.Zinc (Zn) metal reacts with copper sulfate (Cu2SO4) to give zinc
sulfate (ZnSO4) and copper (Cu).
This is a displacement reaction because Zn displaces Cu.
5.A strip of magnesium (Mg) burns brightly in oxygen (O2) to form a white powder, magnesium oxide (MgO).
This is a synthesis reaction because Mg and oxygen react to form magnesy oxide.
6.On heating iron ore (Fe2O3) with carbon (C), we get iron (Fe) and carbon dioxide (CO2).
This is a synthesis reaction because iron oxide reacts with carbon to produce Fe.
Answer:
The amplitude of the sound wave in no way affects the speed of the sound as it affects the loudness of the sound produced. Loudness depends on the square of the amplitude of the wave. Amplitude is the size of the vibration, and this determines how loud the sound is. Larger vibrations make a louder sound.
Explanation:
