Hey there:
density = 11.3 g/cm³
mass = 15,1 g
Therefore:
D = m / V
11.3 = 15.1 / V
V = 15.1 / 11.3
V = 1.336 cm³
Answer:
A. by lowering the activation energy
Explanation:
- Adding a catalyst has this effect on activation energy. A catalyst provides an alternative route for the reaction with a lower activation energy. <em>As illustrated in the attached image.</em>
- This means that more particles have the activation energy required for the reaction to take place (compared to without the catalyst) and so the speed of the reaction increases.
Answer:
The acronym is used to remember evidence of a chemical change.
Explanation:
P=precipitate
U=unexpected color change
F=fizzing
A=aroma
R=replaced by a new substance
T= temperature change
Light energy is turned into chemical energy when <span>when a photochemically excited special chlorophyll molecule of the photosynthetic reaction center loses an electron, undergoing an oxidation reaction.
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Au is the symbol for gold. It comes from Latin word for gold, which is Aurunum. Its atomic number is 79.