Answer:
3.2 Calories
Explanation:
Here we will use a formula
Heat added in calories = Mass of glass x Increase in temperature x specific heat of glass
As we know that, specific heat is the amount of energy required to raise the temperature of one gram of any substance by 1°C. It has a constant value for every substance and for glass the specific heat is .16 calories/gm
Incorporating the values of mass (m), temperature(T) and specific heat (c) in formula.
calories (small calories) = l.0 g x 20 degrees x .16 calories/gm/°C
= 3.2 calories
Hope it helps:)
I think its b but hope this helps :)
using the equation of formation of water:
H2+O2---->H2O
Balancing the equation,
2H2+O2---->2H2O
So now use the ratio from the balance equation, we know that 2 mol of H2 are producing 2 mol of H2O so the ratio will be 1:1.
So as 2 mol of H2O are produced by 2 mol of H2.
That implies 1 mol of H2O are produced by 1 mol of H2.
That is 0.253 mol of H2O are produced by 0.253 mol of H2.
A mole of water molecules contains 2 moles of hydrogen atoms and 1 mole of oxygen atoms.
The atom absorb the light in the discrete packet in the photons