What do we beileve is at the center of the milky way

A) two stars that have collided together

B) a cluster of stars

C) A black hole

D) A collapsed planet

The graph shows the distribution of energy in the particles of two gas samples at different temperatures, T1 and T2. A, B, and C represent individual particles.

Combustion of ethylene glycol leads to a change in internal energy (/DeltaU) of - 1189 kJ at 298 K. What is the corresponding change in enthalpy in kJ/DeltaH? HOCH_2CH_2OH (l) + 5/2 O_2 (g) → 2 CO_2 (g) + 3 H_2O (l) / DeltaU = - 1189 kJ

Balance the half reaction, c5o5 2 - (g) â co3 2 - (aq), taking place in basic media. which answer below describes how many hydroxide ions are needed to balance the half reaction?

Which of these reasons did you include in your response? Check all of the boxes that apply.

According to the kinetic-molecular theory, particles of a gas Select one: a. attract each other but do not collide. b. repel each other and collide. c. neither attract nor repel each other but collide. d.

Which of those molecules are polar. Co2, So2, CH2Cl2, PCl3

A chemical spill gets into the soil and effects the plants within a forested ecosystem. explain why the top predators would be most affected by this

If the heat released during condensation goes only to warming the iron block, what is the final temperature (in ∘C∘C) of the iron block? (Assume a constant enthalpy of vaporization for water of 44.0 kJ/molkJ/mol.)

Which of the following is not a disaccharide? A) sucrose B) maltose C) lactose D) amylose E) all of the above are disaccarides

The process by which a semipermeable membrane allows water molecules, small molecules, and ions to pass through while retaining large particles