What are the changes that occur in each step of a 4 stroke engine in terms of the pressure, volume, temperature, and moles of gas present

What is the mass of 0.46 mil of mgcl2

Can someone me with 3 and 4 plz. this is for masteries test.

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.