How much energy is released when 65.8 g of water freezes

Which describes the Earth's inner core? A. a layer of hot rock B. a layer of rock that forms an outer skin C. a dense ball of solid metal D. a layer of molten metal

Find out the application of all the inert gases prepare a chart

What kind of bond forms between hydrogen and oxygen? ionic hydrogen covalent

When group 2A element from ion they A. lose two proton B. gain two proton C. lose two electron D. gain two electron

In a science experiment, 10 tomato plants were given fertilizer in their water each week and 10 tomato plants were given plain water each week. All other factors were the same for all plants.

Which of the following is an example of a molecule? F C Al O2

Organize the items listed into the proper sequence of events for gas exchange. a: O2 is transported to cells by circulatory system. b: O2 is drawn into the lungs during inhalation. c: Cells use O2 and generate CO2. d: CO2 is exhaled.

Research about the reaction of baking soda and vinegar

What mass (in mg) does 2.63 moles of nickel have? 3.56 * 105 mg 1.54 * 105 mg 2.23 * 104 mg 129 mg?

Given the propane molecule C3H8 (g) ! a) What is the balanced equation for the combustion of propane in O2? (20 pts.) b) What is the standard enthalpy change ΔH0 for the reaction at 25°C? (20 pts.