What do the presence of fish and a wide diversity of invertebrates in a river indicate?

How can you explain why greasy substances are difficult to wash off?

The specific heat of a certain type of metal is 0.128 J / (g ⋅ ∘ C). What is the final temperature if 305 J of heat is added to 93.4 g of this metal, initially at 20.0 ∘ C?

Given a reaction between an organic molecule, denoted as A, and NaSH, we observe the following observations. Using the observations, write a rate law for the reaction.

Which is the second step in the dissolving process?

Check all appropriate statements concerning pentyne. contains exactly 3 carbons contains exactly 5 carbons contains exactly 7 carbons has only single bonds has a double bond has a triple bond is an alkyne is an alkene is an alkane

What is the oxidation number of chromium in the ionic compound ammonium dichromate (nh4) 2cr2o7?

Draw an ecosystem with 10 biotic and 5 abiotic factor

Which organism is responsible for cleanup in this ecosystem? coyote vulture prairie dog grasshopper or prairie grass

What would happen if you tried to sqeeze a gas into a smaller container?

Paint, paint thinners and some cleaning agents can weaken the shell of a hard hat and may eliminate