Jayden has been given 5 cubic centimeters each of 4 unknown samples of gaseous substance. he has been asked to identity which one is hydrogen. sample a 0.00036, sample b 0.000018, sample c 0.00045, d 0.000022. if the density of hydrogen is 0.00009 g/cm^3, which of the unknown is hydrogen.

             Sample-C is the hydrogen.

            Data Given:

                                Volume  = 5 cm³

                                Mass of Sample-C  =  0.00045 g

                                Reference Density  =  0.00009 g/cm³

            Formula Used;

                                Density  =  Mass / Volume

                                Density  =  0.00045 g / 5 cm³

                                Density  =  0.00009 g/cm³

i do not know and i have a 100 in this class

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.