What is the identity of planet A?
Planeta
Planet B
What is the identity of planet B?
Atmosphere is mostly
carbon dioxide.
Atmosphere is
rich in oxygen.
Surface is red.
Surface has
liquid water.
It has a few clouds.
It has many
clouds.

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .

Read "who built the pyramids? ”. leave this link open while you answer the questions throughout the assignment. give at least two reasons why some people claim the pyramids of giza were constructed by aliens.

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?