Which of the following statements are true? i. the electrons in each molecule tend to be attracted to the most electronegative element. ii. each molecular drawing follows the localized electron model. iii. both hf and co2 are linear molecules and therefore nonpolar. iv. the bond angles of nh3 are slightly less than 109.5o because the lone pair compresses the angles between the bonding pairs.

The correct statements are 1 The electrons in each molecule tend to be attracted to the most electronegative element. and 4 The bond angles of NH3 are slightly less than 109.5° because the lone pair compresses the angles betwen the bonding pairs.

Explanation:

The electronegative atom in a covalent bond has a tendency to attract the bonding electron pairs towards itself and generate polarity within that covalent bond.

     The lone pair of electron that is present in the nitrogen atom undergo repulsion with the bond pair electrons  in NH3 thus compressing the bond angles between the bonding pairs.

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: