Use the molar bond enthalpy data in the table to estimate the value of Δ∘rxn for the equation C2H4(g)+HBr(g)⟶C2H5Br(g)

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.

Exit what is the density of an object having a mass of 5.0 g and a volume of 45.0 cm3?