The rock record indicates that photosynthesis began on Earth about 3.5 million years ago.

a. True

b. False

Water sitting in a raised container has kinetic, nuclear, or potential

Calculate the volume of a gas with a pressure of 100 kPa, if its volume at 120 kPa is 1.50 L.

a container holding 2.3 moles of br2 gas is st a pressure of 6.7 atm and has a volume of 14.2 l what is the temperature in k?

Is the process of kno3 dissolving in water spontaneous?

0.408 grams to moles

A = 6 is a solution to the inequality a > 6 true or false

Refer to the example about diatomic gases A and B in the text to do problems 19 - 27. For 3 moles AA, how many moles of BB will be required? __ How many moles of product will be made? __ mol answers should be 1, 2, or 3 for each blank

a drop of water weighing 0.48 g condenses on the surface of a 55-g block of aluminum that is initially at 25C.

I add 3.20 moles of Cu to an excess of AgNO3. How many miles of silver are formed?

Which phrase describes two forms of solid carbon, diamond and graphite, at STP? (1) the same crystal structure and the same properties (2) the same crystal structure and different properties (3) different crystal structures and the same properties