A useful constant Five samples are heated by adding the same amount of energy Q to each one. The copper sample has a mass of m kg that contains N moles of copper atoms. Rank the samples based on the total change in temperature after the heat is added without looking up the specific heats of the three metals. a. N moles of gold
b. M kg of gold
c. M kg (and N moles) Of copper
d. M kg of aluminum
e. N moles of aluminum

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

In a water molecule, hydrogen and oxygen are held together by a(an) bond. a) double covalent b) ionic c) nonpolar covalent d) hydrogen e) polar covalent

What is conserved in the reaction shown below? h2(g) + cl2 (g) --> 2hcl(g)a. mass onlyb. mass and moles onlyc. mass, moles, and molecules onlyd. mass, moles, molecules, and volume