What are the ways in which we reduce the pressure and increase the pressure of or convenience​

What’s the scientific notation for the number 6,840,000,000

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

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount