Pl help it’s for a grade I will give

it is c

Explanation:

b,c,a is the decreasing for

10,7,1

Answer D: B, C, A

Explanation:

A Newton is measured in kg*m/s^2 and it can be interpreted as "this is how much an object weighing 1kg will accelerate when this much force is applied.

So to get the acceleration, we need to divide the force by the weight.

Object A:

a = 1N / 2kg = 1kg*m/s^2 / 2kg = 0.5m/s^2

Object B:

a = 10N / 8kg = 10kg*m/s^2 / 8kg = 1.25m/s^2

Object C:

a = 7N / 7kg = 7kg*m/s^2 / 7kg = 1m/s^2

So the decreasing order of acceleration is B, C, A

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%