Guys this is science. 4.18 Module Exam. I HATE tests! I know it's to test how smart I am but I'm being sarcastic, I AM SMART AND I KNOW IT LOL but I STILL have to take the test! And I don't understand some questions on tests. I'm like yikes sometimes when I get a 60% but its mostly A's and B's. If you support and comfort me on the exact rate, I'll mark you brainliest but I'll wait till I get 2 or more answers and see which one is better! Thanks!

The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

Sodium sulfate dissolves as follows: na2so4(s) → 2na+(aq) + so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m?