Hello!
The number of 20-g ice cubes required to absorb 47 kJ from a glass of water upon melting is 7 icecubes
Why?
We are going to clear from the equation of the released heat, the mass of ice (m). The specific latent heat of fusion of ice is 336 kJ/kg:
So, 7 ice cubes are required to absorb that amount of heat from the glass of water.
Have a nice day!
Answer:
Explanation:
I ) Oxide that dissolves in water to give a solution of pH greater than 7 - Na₂O
It is a metallic oxide and therefore basic in nature . It will dissolve in water to give pH more than 7 .
II )
Acidic oxide insoluble in water - SiO₂ . It reacts with CaO to give CaSiO₃
III ) NO₂
Acid anhydride : SiO₂ It is anhydride of H₂SiO₃ ( H₂O + SiO₂ )
IV ) No effect on moist paper - CO . It is neutral oxide .
V ) Peroxide - Ba O₂
VI ) Amphoteric - ZnO
Answer:
Hello There!!
Explanation:
The answer is=>a. Gibbs.
hope this helps,have a great day!!
~Pinky~
The amount of CO2 in the atmosphere has increased dramatically due to(mainly) excessive burning of fossil fuels.
