What is the basic unit of all matter?

neutron

B

atom

C

electron

D

oroton

Euces

At STP, which element is solid, brittle, and a poor conductor of electricity? (1) Al (3) Ne (2) K (4) S

What is the mass of 3.90 moles of magnesium chloride

Which term is a single pathway of feeding in an ecosystem? A. food web B. energy flow C. energy pyramid D. food chain

Calculate the percent activity of the radioactive isotope rhenium-186 remaining after 3 half-lives.

Which of the following is a homogeneous mixture? a. sodium chloride b. oxygen c. salad d. salt water

Why do we see sunlight as white?

Write the chemical formula, condensed formula, and Lewis structure for each of the following hydrocarbons: (a) heptane (b) 3-methylhexane (c) trans-3-heptene (d) 4-methyl-1-hexene (e) 2-heptyne (f) 3,4-dimethyl-1-pentyne

For organisms that reproduce sexually the traits that's the offspring inherits depends on what A. The habitat the parents live in B. The area the parents migrate to C. The genes that are passed down from the parents D.

How many milliliters of ammonium sulfate solution having a concentration of 0.218 M are needed to react completely with 62.6 ml of 2.31 M sodium hydroxide solution?

Venus's atmosphere 1. has almost the same chemical composition as Earth's. 2. is predominantly made of acid droplets. 3. shows very high levels of humidity. 4. is composed mostly of carbon dioxide.