If you have 38 grams of CH4 how many moles of CH4 do you have
0.42 moles
2.3 moles
609.6 moles
38 moles

Use the drop-down menus to label each of the following changes p for physical change and c for chemical change. the substance changes to a new substance. the original substance can be recovered. the color changes. gas is produced and given off. the substance changes size, shape, or volume.

Which of the following is an example of how telecommunication devices people do their jobs? a.) a security guard checks the time using a digital watch. b.) a banker does some quick math using a solar calculator. c.) a nurse uses a digital thermometer to take a patient’s temperature. d.) a construction worker reports in to his office using a cell phone.

Explain how global warming could have affected yellowstone frog and salamander habitat's, resulting in changes in the populations of these species