Which of the following elements is present in all living things?

a. aluminum

c. carbon

b. lead

d. helium

When bromobenzene reacts with propene in a heck reaction (in the presence of pd (php3) 4 and et3n), two constitutional isomers are obtained as the products. give the structures of the two products. interactive 3d display mode?

Write and balance the equation for the formation of magnesium hydroxide and hydrogen from magnesium and water. Determine the possible mole ratios.

The source of materials which eventually formed our vast coal and oil deposits came from (plant & animal matter, volcanic ash, rocks) buried in (ingenious, metamorphic, sedimentary) rocks all over the earth.

I put a cup of water near the window next day it's half gone is from evaporation

Which one of the following is the strongest intermolecular force experienced by noble gases? A) London Dispersion Forces (LDFs) B) dipole-dipole interactions C) hydrogen bonding D) ionic bonding E) polar covalent bonds

The flame from my candle gives off black smoke heat and light what type of changes do these indicate

Which one of the following processes results in a decrease in the number of neutrons? corrosion electron capture gamma emission positron emission alpha emission

Calculate the root mean square velocity of F2, Cl2, and Br2 at 304 K.

The total pressure inside a 1.62 cylinder kept at 35°C is 1.15 atm. If the volume of the cylinder drops to 0.74 L and the temperature remains the same, what is the new pressure inside the cylinder?

What is difference between tempering and aging?