Hello can anyone help? Potassium, K, forms a compound with fluorine, F
Which statements about this compound are correct?

1) The compound is ionic.
2) The formula of the compound is KF.
3) The compound is soluble in water.

A) 1 2 and 3
B) 1 and 2 only.

C) 1 and 3 only
D) 2 and 3 only

A ) 1, 2 and 3

Explanation:

1 ) is correct because,

K donates 1 electron

F gain 1 electron from K.

If donating and gaining of electrons takes place between two electron, then type of compound formed is ionic.

2 ) is correct because,

K + F > KF

3 ) is correct because,

KF is soluble in cold water; very soluble in hot water.

A ) 1, 2 and 3

 1 ) is correct because,  

K donates 1 electron

F gain 1 electron from K.

If donating and gaining of electrons takes place between two electron, then type of compound formed is ionic.

2 ) is correct because,

K + F > KF

3 ) is correct because,

KF is soluble in cold water; very soluble in hot water.

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%

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'