}wbich one of the following is a pure substance? a) concrete b)wood c) salt water d) elemental silver e)milk.

Achef makes salad dressing by mixing oil, vinegar, and spices, as shown. which type of matter is the salad dressing?

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?