What is the mass percent of NH_Cl in the original 10.000 g of powdered mixture? Choose the closest answer. The formula for mass percent calculations is given below: %m/m = ma/Msample X 100 Select one: O 25.32% 95.42% A o 5.29% 48.62%

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

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.