<span>An electron jumps from energy level 1 to energy level 2 by absorbing a photon of ... How many moles of methane are produced when 25.1 moles of carbon ... 10.0 grams of octane are burned in a bomb calorimeter containing 2.00 × 102 g H2O. ... is released if the water temperature increases by from 25.00oC to 37.00oC?</span><span>
</span>
The first one is not balanced
H=2. H=2.
O=2. O=1
The second one is balanced
Na =6. Na=6
S=3. S=3
Answer:
Chemical change
Explanation: Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances.
Answer:
Atomic mass of Sodium is 22.9897 u. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. The unit of measure for mass is the atomic mass unit (amu). One atomic mass unit is equal to 1.66 x 10 -24 grams.
Explanation: