1. What is your hypothesis for this experiment? Write it as an "If , then..." statement 2. What are the three variables? a. Independent b. Dependent - C. Controls - 3. What purpose would the sand serve? In other words, what does it represent in the lab? 4. What purpose would the water serve? In other words, what does it represent in the lab? 5. What purpose would the heat lamps serve? In other words, what does it represent in the lab? 6. What purpose would the thermometers use? In other words, what does it represent in the lab? 7. How can you use these materials to test whether land or water heats faster? 8. How would you compare whether land or water heats faster? How do you know? 9. Within a 24-hour period, at what three points (times) should the temperature be taken in the sand and water? Why? 10. What would be an effective conclusion for your lab?

Now consider the reaction when 45.0 g naoh have been added. what amount of naoh is this, and what amount of fecl3 can be consumed by it?

Follow the steps provided in the simulation to add water to the graduated cylinder, select one of the three samples (copper, silver, or gold), set its mass to the values given in the statements below, and calculate its density. here is a summary of the steps required: add water by clicking and holding prepare a known volume of water button. until the desired volume of water has been added. if more than the desired volume is added, click the reset button. button and redo the procedure. a single click will add about 21.0 ml of water. to set the mass, click and hold weigh out metal button. until the desired amount of metal is added to the weighing pan. once the desired mass of the metal is added, release the button. transfer the metal to water and then click on calculate density button. to see how the density is calculated using water displacement to measure the volume of the solid. to save time you can approximate the initial volume of water to â±1 ml and the initial mass of the solid to â±1 g. for example, if you are asked to add 23 ml of water, add between 22 ml and 24 ml. which metals in each of the following sets will have equal density? check all that apply.

Non renewable resources like petroleum eventually