A because b is for photosynthesis
Empirical formula is the simplest ratio of whole numbers of components in a compound
in 100 g of compound
C H O
mass 25.5 g 6.40 g 68.1 g
number of moles 25.5 g/12 g/mol 6.40 g/ 1 g/mol 68.1 g/ 16 g/mol
= 2.13 mol = 6.40 mol = 4.26 mol
divide by least number of moles
2.13/2.13 = 1 6.40/2.13 = 3.0 4.26/2.13 = 2.0
all rounded off
C - 1
H - 3
O - 2
empirical formula - CH₃O₂
Probably the CO2 concentration. If the earth gets warmer by rising greenhouse gases (one of which is CO2), the amount of rainfall and precipitation increases. I am not an expert, but that's my first guess.
Explanation:
Well Mercury I is a difficult one, but I if it is at room temperature then, I it would stay a liquid but below room temperature it would be melt and above room temperature it would freeze
Answer:
II and IV.
Explanation:
To know which option is correct, do the following:
Energy (E) and frequency (f) are related by the following equation:
E = hf
Where:
E is the energy.
h is the Planck's constant.
f is the frequency.
From the equation E = hf
Energy is directly proportional to the frequency. This implies that an increase in the frequency will also increase the energy and a decrease in the frequency will also decrease the energy.
Therefore, (II) in the question above is correct.
Velocity (v), wavelength (λ) and frequency (f) are related by the following equation:
v = λf
Divide both side by λ
f = v/λ
Thus, we can see clearly that the frequency is inversely proportional to the wavelength. This means that an increase in frequency will decrease the wavelength and a decrease in frequency will increase the wavelength.
Therefore, (IV) in question above is correct.
Thus, II and IV are the correct answers.
