4. If 4.0 g of helium gas occupies a volume of 22.4 L at 0 °C and a pressure
of 1.0 atm, what volume does 3.0 g of Helium occupy UNDER THE SAME
CONDITIONS? (Hint: what is the molar mass of helium?) *

Find the protons, electrons and neutrons for strontium with a mass of 83

1. explain hydrogen peroxide, h 2 o 2 properties and decomposition reaction. 2. describe how each of the following natural cycles plays a part in earth’s climate system. (a) the water cycle (b) the carbon cycle

What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.