Which of the following is a primary consumer in the food web shown above?

A.

grasshopper

B.

bacteria

C.

duck

D.

earthworm

Which particle has the same electron configuration as a potassium ion? A. fluoride ion B. sodium ion C. neon atom D. argon atom

How many grams of CaH2CaH2 are needed to generate 147 LL of H2H2 gas if the pressure of H2H2 is 823 torrtorr at 21 ∘C∘C? Express your answer using three significant figures.

Dominic made the table below to organize his notes about mixtures. Properties of Mixtures has no set composition must have more than one state of matter must have more than one substance What mistake did Dominic make?

In which stage of the cell cycle does the division of the nucleus occur?

What do you call a bond between two neutral atoms that share electrons

When you open a bottle of soda, bubbles of carbon dioxide start appearing. Is this a chemical or physical change and why?

Al2 (SO3) 3 what are the number of atoms

How marly electrons are in an atom of elemental sodium?

Petroleum and coal can be mined from the continental shelf. t/f

A solid substance turns into a liquid. Which best describes this change?