What is one way to describe elements?

A. building blocks

B. they break down easily

C. smallest particles of material

D. they are the most expensive materials on earth

What is the common device used for measuring heat transfer for chemical reactions called? thermometer calorimeter molameter

Nitric oxides, no and no2, contribute to air pollution, acid rain, and the depletion of the ozone layer. after no forms in the combustion chamber of an automobile engine, it reacts further with oxygen to form no2. the reaction is given by

Why are all of the substances on the periodic table classified as elements?

How many neutrons are found in an atom of aluminum-27?

Using the spectra data below, which structure best matches this data? c4h8o 1h nmr triplet at 1.05 ppm (3h) singlet at 2.13 ppm (3h) quartet at 2.47 ppm (2h) ir spectrum: there is a strong peak near 1700 cm-1.

Sodium (Na) reacts with chlorine gas (Cl2 ) to form sodium chloride (NaCl) as shown in the equation: 2Na + Cl2 → 2NaCl If 4 moles of chlorine gas react, how many moles of sodium will react?

What are transuranium elements properties?

A geologist finds a section of rock that shows was ripple marks. What does it he pr send me or a ripple marks say about the area where the rock formed? A. the rock from rk s in a fast moving stream B.

375centimetercube of a gas has a pressure of 770mmHg. find it's volume if the pressure is reduced to 750mmHg

How did the planets in our solar system form?