Answer: 1. The ratio of the reactant aluminum to the product aluminum sulphate is 2:1
2. Option D. 1,3,2,2
Explanation: 1. From the balanced equation:
2Al + 3H2SO4 -> Al2(SO4)3 + 3H2
2moles of Al produced 1mole of Al2(SO4)3. Therefore, the ratio will be 2:1
2. C2H4 + 3O2 ---> 2CO2 + 2H2O from the equation, the coefficients are 1,3,2,2
All wavelengths/colours that are visible make up white light. From violet (between 380 nm and 450 nm) to red (between 400 nm and 700 nm).
Answer:
TRY HARD!
Explanation:
DO UR WORK ANG GET IT DONE!
To calculate this,
We know that energy is 1 photon
E = hc/wavelenth
wavelength of 10.0 m
Solution:
h = 6.626 x 10^-34 Jsec
C = 2.9979 x 10^8 m/sec
E = 6.626 10^-34 * 2.9979 10^8 / 10 = 1.9864 10^-26J
Then, the number of photons is computed by:
n = 1000 / 1.9864 10^-26 = 5.04 10^28 photons
