after completing an experiment to determine gravimetrically the percentage of water in a hydrate, a student reported a value of 38 percent. the correct value for the percentage of water in the hydrate is 51 percent. which of the following is the most likely explanation for this difference?

Certification programs are offered by all of the following except

Summarize the work of famous environmental scientists of the past.

An ecosystem is shown in the illustration. assume that human activities have led to a decrease in the number of eagles. a virus attack on rabbits has led to a decrease in their population in the ecosystem. which two sentences describe likely effects on the ecosystem? 1. there’s an increase in the number of snakes and insects and a decrease in the number of frogs. 2. there’s an increase in the number of snakes and insects, and the storks face increased competition for food. 3. there’s an increase in the number of storks and a decrease in the number of snakes and insects. 4. there’s an increase in the number of frogs and a decrease in the number of storks and insects. 5. there’s a decrease in the number of snakes, insects, and frogs.