The number of valence electrons in an atom that has an atomic number of 13 is

What do seismic waves and sounds waves have in common

Which of the statements accurately describes compounds? They contain two visibly distinct parts. They can be broken down by chemical means. They cannot contain more than two different components. They are pure substances.

Explain why larger crystals form if the porcelain is made differently

Determine the ph of a 0.62 m nh4no3 solution at 25°c. The kb for nh3 is 1.76 * 10-5.

A flexible container is filled with 960.0 liters of air at 38 degrees Celsius. If pressure in the container does not change, at what temperature will the container have at a volume of 350.0 liters?

Calculate the mass of 2.25*10^22tungsten atoms.

Which weathering process involves physical forces but not chemical reactions or dissolving of minerals

Convert 4.57X-3m to the equivalent length in nanometers

A rock falls off a cliff and hits the ground after three seconds. What is its velocity right before it hits the ground? 9.8 m/s 0.31 m/s 29.4 m/s 3.3 m/s

Which compound is an isomer of pentane? (1) butane (3) methyl butane (2) propane (4) methyl propane