1 - 2Na + O2 ➔ Na2O Balanced Not Balanced 2 - 2NaNO3 ➔ 3NaNO2 + O2 Balanced Not Balanced

3 - 2Al + 3Cl2 ➔ AlCl3 Balanced Not Balanced

4- 2P + 3I2 ➔ 2PI3 Balanced Not Balanced

5 - 2Al + 2H3PO4 ➔ 3H2 + 2AlPO4 Balanced Not Balanced

6 - H2O2 ➔ 2H2O + O2 Balanced Not Balanced

7 - 2HCl + CuO → CuCl2 + H2O Balanced Not Balanced

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

For a family dinner, jose’s mom baked a loaf of bread. during the meal, his grandmother commented, “this bread is so dense! ” what do you think his grandmother meant by the word dense? you have some ideas regarding density already, but this experiment will enrich your understanding of the relationship between mass, volume and the density of objects. when making measurements in this experiment we will be using si units, the international system of units. the purpose of using si units is to have the ability to communicate and compare data results with other experiments without having to make conversions. measurement symbol si unit length m meter mass kg kilogram volume l liters density kg/l kilograms per liter any calculations that are performed during this experiment will ultimately be reported in scientific notation. recall that scientific notation is extremely important when we have data that is extremely small or large. scientists rely on a standard form of communication to quickly make hypotheses and judgements based on data. what is the density of block a? a0kg/l what is the density of block b? a1kg/l what is the density of block c? a2kg/l what is the density of block d? a3kg/l what is the density of block e? a4kg/l which block is the densest? a5