Answer:
Percent yield is the percent ratio of actual yield to the theoretical yield. It is calculated to be the experimental yield divided by theoretical yield multiplied by 100%. If the actual and theoretical yield are the same, the percent yield is 100%.
Usually, percent yield is lower than 100% because :
1. The actual yield is often less than the theoretical value.
2. Incomplete reactions, in which some of the reactants do not react to form the product.
3. Practical losses during the experiment, such as during pouring or filtering.
4. Side reactions (unwanted reactions that compete with the desired reaction).
Answer:
Chemical digestion of food begins once the food reaches the digestive acids inside of the stomach.
Explanation:
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Answer;
2) the rate at which changes occur in a type of molecule
Explanation;
The molecular clock is figurative term for a technique that uses the mutation rate of biomolecules to deduce the time in prehistory when two or more life forms diverged.
Scientists can use relaxed-clock methods to deal with variation in the rate of the molecular clock. By measuring the patterns of evolutionary rate variation among organisms, they can also gain valuable insight into the biological processes that determine how quickly the molecular clock ticks.
In photosynthesis, carbohydrates are broken down into CO2 and water when they combine with atmospheric oxygen.