How many grams of NaCl is needed to make a 5M solution in 0.5L of water?

Please helppp! :)

What is the molar mass of a gas that has density of 2.054 g/l

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

Which of the following describes a situation where competition between producers exists