Which is most like a scientific model?

A.

a thermometer

B.

an inch

C.

an element

D.

a map

How to Calculate the percentage of compound?

The balanced chemical reaction for the decomposition of trinitrotoluene (TNT) is 2 C7H5 (NO2) 3 (s) → 7 C (s) + 7 CO (g) 3 N2 (g) + 5 H2O (g) If one mole of TNT decomposes, how many total moles of all products are formed? a. 1 b. 2 c. 11 d. 22 e. 44

Often atoms join so that each atom will have what?

What volume would 4 moles of gas occupy at stp? do this without a calculator. you may need to use longhand calculations. the question is designed to tolerate reasonable rounding?

Which of the following cannot be separated by physical means? Mixtures Solutions Elements None of the above

Least reactive element of period 3

A chemical formula shows the kind and number of Atoms that form a what? compound, mixture, solution, or suspension

What gas was used as a deadly posiosn in world war 1?

Four moles of hydrogen chloride (HCl) gas react with one mole of oxygen (O2) gas to produce two moles of chlorine gas (Cl2) and two moles of water gas (H2O).

what noble gas electron configuration is achieved by the bromine atoms in a molecule of BR2, a diatomic element?