Answer:
Option 4
Explanation:
Hydrochloric acid is a strong one, that gives protons to medium. It can be dissociated as this:
HCl → H⁺ + Cl⁻
M means Molarity. It is a sort of concentration that indicates the moles of solute in 1L of solution.
M = moles / volume (L)
We can also say M = mmoles / mL of solution
M . mL = mmoles
0.453 M . 62.85mL = 28.5 mmoles
If we divide by 1000 → 28.5 mmol . 1 mol / 1000 mmol = 0.0285
Answer:
The empirical formula of the compound is 
.
Explanation:
Mass of magnesium in compound = 0.273 g
Mass of nitrogen in the compound = 0.105 g
Moles of magnesium =
Moles of nitrogen = 
Form empirical formula divides the lowest value of moles of an element present with all the moles of elements present.
Magnesium 
Nitrogen 
The empirical formula of a compound:
The empirical formula of the compound is .
A molecular structure shows the bond angle and the Bond length between different atoms in a compound.
Answer: Option C) 0.64kPa
Explanation:
Given that,
Original volume V1 = 11.2 L
original pressure P1 = 0.860kPa
New volume V2 = 15.0 L
New pressure P2 = ?
Since pressure and volume are involved while temperature is constant, apply Boyle's law
P1V1 = P2V2
0.860 kPa x 11.2 L = P2 x 15.0L
9.632 kPaL = P2 x 15.0L
P2 = 9.632 kPaL / 15.0L
P2 = 0.64 kPa
Thus, the pressure of the gas is 0.64kPa
