Explain why scientists use models

What does an aluminum atom become when it loses its three valence electrons? a?

Based on reference table L, H2O is a stronger acid than

A copper coin with a mass of 6.30 grams changes temperature in the sunshine from 20.0°C to 32.0°C. How much energy is transferred? The specific heat capacity of copper is 0.377 joules/gram degree Celsius.

Na2CrO4 + PbCL2 Formula in double replacement

Carbonated drinks in cans have a small amount of space above the liquid level inside the can known as the "headspace." What would be true about the gas in this headspace if the can is opened?

In the reaction Mg (s) + 2HCl (aq) H2 (g) + MgCl2 (aq), how many grams of hydrogen gas will be produced from 125.0 milliliters of a 6.0 M HCl in an excess of Mg

An element has an atomic number of 92 and a mass number of 234, how many neutrons are there?

What energy is a quarterback's arm before throwing a pass

Which atom can accommodate an octet of electrons but doesn't necessarily have to?

Heat is an exchange of internal energy from one system to another due to A. a temperature difference between the systems. B. one system being gas and the other being solid. C. the systems having the same temperature. D.