3.50M solution? Show your work! What is the molarity of these solutions? Show your work!

a. 3.5 mol HBr in 500 mL of water

b. 0.0750 mol NaCl in 250.0 mL of water

c. 1.95 mol AgNO3 in 1.2 L of water

d. 0.500 mol NH3 in 2.5 L of water

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.