People walking on the sidewalk crushthe calcium chloride pellets.
Answer is: empirical formula is H₄N₂O₂.
m(unknown compound) = 8,5 g.
m(N₂) = 2,37 g.m(H₂O) = 3,04 g.
n(N₂) = m(N₂) ÷ M(N₂).
n(N₂) = 2,37 g ÷ 28 g/mol.
n(N₂) = 0,0846 mol.
n(H₂O) = m(H₂O) ÷ M(H₂O).
n(H₂O) = 3,04 g ÷ 18 g/mol.
n(H₂O) = 0,168 mol.
n(H₂O) : n(N₂) = 0,168 mol : 0,0846 mol.
n(H₂O) : n(N₂) = 2 : 1.
Compound has four hydrogen, two oxygen and two oxygen.
It is a covalant bond. Because any compound made up of nonmetals will be covalant. Compounds made up of a non metal and metal willl form a ionic compund. :)
Answer: metallic solid
Explanation:
Copper is a metallic crystalline solid. A metallic solid is an element that can withstand high temperatures and conduct electricity.
To do this, you need to use the combined gas law
(P1)(V1) / T(1) = (P2) (V2) / 2
For temperature, convert to Kelvins
T1= 20.1C + 273
T1= 293.1 K
T2= 40 +273
T2= 313 K
Now sub the numbers into the formula
(1) (0.78) / 293.1 = (1.2) (V2) / 313
0.00266 = 1.2(V2) / 313
0.833 = 1.2(v2)
V2= 0.69 L is the new volume
