Caesium -bluish(Latin) Chlorine -yellow/green (Greek) Iodine -violet (Greek) <span>Rhodium -rose (Greek) Sulphur - yellow (Arabic)</span>
Fireflies. LED, fluorescent light
Answer:
Chemical reactions that absorb (or use) energy overall are called endothermic. In endothermic reactions, more energy is absorbed when the bonds in the reactants are broken than is released when new bonds are formed in the products.
Black clothing absorbs most of the light that hits it
Answer:
87.5 % is the percent yield
Explanation:
We convert the mass of H₂ to moles: 4 g / 2g/mol = 2 moles of H₂
The reaction is: CO(g) + 2H₂(g) → CH₃OH(l)
So ratio is 2:1. Therefore, If I have 2 moles of hydrogen I would produce 1 mol of methanol.
So, as molar mass of methanol is 32g/mol; 32 g is the mass of produced methanol, at the 100 % yield reaction (theoretical yield)
Percent yield will be: (produced yield/ theoretical yield) . 100
(28 g / 32g) . 100 = 87.5 %
