Which one of this is endothermic and which one is exothermic?

CH2+O2 - > CO2+H2O+Energy

CaCo+Energy - > CaCo+CO2

What is the value for ∆Soreaction for the following reaction, given the standard entropy values? 2 Al (s) + 3Cl2 (g) 2AlCl3 (s)

When combing one's hair, the comb becomes positively charged. What happens to the hair being combed?

He orbital period of an object is 2 * 107 s and its total radius is 4 * 1010 m

Most earthquakes are produced by the rapid release of what kind of energy stored in rock and subjected to great forces?

Which organism lived on Earth during the Precambrian time? A. fern B. dinosaur C. cyanobacteria D. octopus

Many things can cause an organism to become extinct. Here are some possible causes of extinction. Select the human causes of extinction.

Which word equation shows lithium oxide being formed from the reaction between oxygen and lithium? oxygen + lithium oxide Right arrow. Lithium lithium + oxygen Right arrow. Lithium oxide oxygen + lithium Right arrow.

What happens to the speed of light when waves travel through a denser medium

A 1.79-L flask is filled with propane gas (C3H8), at 1.00 atm and - 16.1°C. What is the mass of the propane in the flask?

If an amino acid contained a hydrocarbon (a group of multiple carbons and hydrogens linked together) as its side group, in which of the following categories could it be appropriately designated? A) hydrophilicB) polar C) nonpolarD) basicE) acidic