Iam a gas with the mass number of 19

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Which of the following is most likely true about water in chemical solutions?

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.