Which of the folowing is true about radio waves?

☹They have short wavelenghts

☹They can penetrate dust clouds

☹They reveal hot gases

☹They have high energies

4) Acompound has an empirical formula of Na2co3, and a molar mass of 3.18g/mol. Find its molecular formula.

What volume of 0.205 m k3po4 solution is necessary to completely react with 154 ml of 0.0110 m nicl2? 1.65 l?

Based on the information in the graph, which statement best applies to a gas? Its particles have the highest average kinetic energy. Its particles have the smallest volume of all three states of matter.

What are the stable isotopes of carbon?

Which of the following could be said about ecological footprints? A. Exact ecological footprints are often difficult to calculate, but estimates can be useful in comparing populations. b.

What is the charge of that particle? A). + e B).-2/3 e C).0 D).+2/3

How many palisade cells from plant leaves would fit in a volume of 1.0 cm cubed of cells if the average volume of a palisade cell is 0.0147 mm cubed?

Two examples of common items that use chemical change

Which has more mass, a 28.0-cm3 piece of lead or a 16.0-cm3 piece of gold? the density of lead is 11.4 g/cm3; the density of gold is 19.3 g/cm3?

If the body is a city what would it be