Alength of glass tubing is 0.525 m. how many inches long is the tubing? (2.54 cm = 1 inch)
a. 0.0133 inches
b. 0.207 inches
c. 20.7 inches
d. 52.5 inches
e. 133 inches

Answer : The correct option is, (C) 20.7 inches

Explanation :

The conversion used from meter to centimeter is:

1 m = 100 cm

The conversion used from centimeter to inches is:

2.54 cm = 1 inch

First we have to convert the length of glass tubing from meter to centimeter.

As,

So,

Now we have to convert the length of glass tubing from centimeter to inches.

As,

So,

Therefore, the length of glass tubing in inches are 20.7 inches.

120,630,890

step-by-step explanation:

110+10=120,620+10=630,880+10=890

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%