Plz

the density of sodium is 0.97g/cmcubic. if a sample of sodium has a volume of 2.6cm cubic what is the mass of the sample

plz and show your work and plz explain to me so i can do other questions related to this

Alright, so the start point is the 2.6cm³. Next you use the density to find the amount in grams. The density can be written out as an identity which in this case would be 0.97gNa=1cm³Na. So you have this equation

2.6mL Na × ≈ 2.5g Na

Remember that 1cm³=1mL and that all answers must follow the rules of significant figures and rounding.

answer; i do believe the correct answer is (river); /// good luck

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%